class GlancesPlugin(object):
"""Main class for Glances plugin."""
def __init__(self, args=None, items_history_list=None):
"""Init the plugin of plugins class."""
# Plugin name (= module name without glances_)
self.plugin_name = self.__class__.__module__[len('glances_'):]
# logger.debug("Init plugin %s" % self.plugin_name)
# Init the args
self.args = args
# Init the default alignement (for curses)
self._align = 'left'
# Init the input method
self._input_method = 'local'
self._short_system_name = None
# Init the stats list
self.stats = None
# Init the history list
self.items_history_list = items_history_list
self.stats_history = self.init_stats_history()
# Init the limits dictionnary
self._limits = dict()
# Init the actions
self.actions = GlancesActions(args=args)
# Init the views
self.views = dict()
def exit(self):
"""Method to be called when Glances exit"""
logger.debug("Stop the {0} plugin".format(self.plugin_name))
def __repr__(self):
"""Return the raw stats."""
return self.stats
def __str__(self):
"""Return the human-readable stats."""
return str(self.stats)
def get_key(self):
"""Return the key of the list."""
return None
def add_item_history(self, key, value):
"""Add an new item (key, value) to the current history."""
try:
self.stats_history[key].append(value)
except KeyError:
self.stats_history[key] = [value]
def init_stats_history(self):
"""Init the stats history (dict of list)."""
ret = None
if self.args is not None and self.args.enable_history and self.get_items_history_list() is not None:
init_list = [i['name'] for i in self.get_items_history_list()]
logger.debug("Stats history activated for plugin {0} (items: {1})".format(self.plugin_name, init_list))
ret = {}
return ret
def reset_stats_history(self):
"""Reset the stats history (dict of list)."""
if self.args is not None and self.args.enable_history and self.get_items_history_list() is not None:
reset_list = [i['name'] for i in self.get_items_history_list()]
logger.debug("Reset history for plugin {0} (items: {1})".format(self.plugin_name, reset_list))
self.stats_history = {}
def update_stats_history(self, item_name=''):
"""Update stats history."""
if (self.stats and self.args is not None and
self.args.enable_history and
self.get_items_history_list() is not None):
self.add_item_history('date', datetime.now())
for i in self.get_items_history_list():
if isinstance(self.stats, list):
# Stats is a list of data
# Iter throught it (for exemple, iter throught network
# interface)
for l in self.stats:
self.add_item_history(
l[item_name] + '_' + i['name'], l[i['name']])
else:
# Stats is not a list
# Add the item to the history directly
self.add_item_history(i['name'], self.stats[i['name']])
def get_stats_history(self):
"""Return the stats history."""
return self.stats_history
def get_items_history_list(self):
"""Return the items history list."""
return self.items_history_list
@property
def input_method(self):
"""Get the input method."""
return self._input_method
@input_method.setter
def input_method(self, input_method):
"""Set the input method.
* local: system local grab (psutil or direct access)
* snmp: Client server mode via SNMP
* glances: Client server mode via Glances API
"""
self._input_method = input_method
@property
def short_system_name(self):
"""Get the short detected OS name (SNMP)."""
return self._short_system_name
@short_system_name.setter
def short_system_name(self, short_name):
"""Set the short detected OS name (SNMP)."""
self._short_system_name = short_name
def set_stats(self, input_stats):
"""Set the stats to input_stats."""
self.stats = input_stats
def get_stats_snmp(self, bulk=False, snmp_oid=None):
"""Update stats using SNMP.
If bulk=True, use a bulk request instead of a get request.
"""
snmp_oid = snmp_oid or {}
from glances.snmp import GlancesSNMPClient
# Init the SNMP request
clientsnmp = GlancesSNMPClient(host=self.args.client,
port=self.args.snmp_port,
version=self.args.snmp_version,
community=self.args.snmp_community)
# Process the SNMP request
ret = {}
if bulk:
# Bulk request
snmpresult = clientsnmp.getbulk_by_oid(0, 10, itervalues(*snmp_oid))
if len(snmp_oid) == 1:
# Bulk command for only one OID
# Note: key is the item indexed but the OID result
for item in snmpresult:
if iterkeys(item)[0].startswith(itervalues(snmp_oid)[0]):
ret[iterkeys(snmp_oid)[0] + iterkeys(item)
[0].split(itervalues(snmp_oid)[0])[1]] = itervalues(item)[0]
else:
# Build the internal dict with the SNMP result
# Note: key is the first item in the snmp_oid
index = 1
for item in snmpresult:
item_stats = {}
item_key = None
for key in iterkeys(snmp_oid):
oid = snmp_oid[key] + '.' + str(index)
if oid in item:
if item_key is None:
item_key = item[oid]
else:
item_stats[key] = item[oid]
if item_stats:
ret[item_key] = item_stats
index += 1
else:
# Simple get request
snmpresult = clientsnmp.get_by_oid(itervalues(*snmp_oid))
# Build the internal dict with the SNMP result
for key in iterkeys(snmp_oid):
ret[key] = snmpresult[snmp_oid[key]]
return ret
def get_raw(self):
"""Return the stats object."""
return self.stats
def get_export(self):
"""Return the stats object to export."""
return self.get_raw()
def get_stats(self):
"""Return the stats object in JSON format."""
return json.dumps(self.stats)
def get_stats_item(self, item):
"""Return the stats object for a specific item in JSON format.
Stats should be a list of dict (processlist, network...)
"""
if isinstance(self.stats, dict):
try:
return json.dumps({item: self.stats[item]})
except KeyError as e:
logger.error("Cannot get item {0} ({1})".format(item, e))
return None
elif isinstance(self.stats, list):
try:
# Source:
# http://stackoverflow.com/questions/4573875/python-get-index-of-dictionary-item-in-list
return json.dumps({item: map(itemgetter(item), self.stats)})
except (KeyError, ValueError) as e:
logger.error("Cannot get item {0} ({1})".format(item, e))
return None
else:
return None
def get_stats_value(self, item, value):
"""Return the stats object for a specific item=value in JSON format.
Stats should be a list of dict (processlist, network...)
"""
if not isinstance(self.stats, list):
return None
else:
if value.isdigit():
value = int(value)
try:
return json.dumps({value: [i for i in self.stats if i[item] == value]})
except (KeyError, ValueError) as e:
logger.error(
"Cannot get item({0})=value({1}) ({2})".format(item, value, e))
return None
def update_views(self):
"""Default builder fo the stats views.
The V of MVC
A dict of dict with the needed information to display the stats.
Example for the stat xxx:
'xxx': {'decoration': 'DEFAULT',
'optional': False,
'additional': False,
'splittable': False}
"""
ret = {}
if (isinstance(self.get_raw(), list) and
self.get_raw() is not None and
self.get_key() is not None):
# Stats are stored in a list of dict (ex: NETWORK, FS...)
for i in self.get_raw():
ret[i[self.get_key()]] = {}
for key in listkeys(i):
value = {'decoration': 'DEFAULT',
'optional': False,
'additional': False,
'splittable': False}
ret[i[self.get_key()]][key] = value
elif isinstance(self.get_raw(), dict) and self.get_raw() is not None:
# Stats are stored in a dict (ex: CPU, LOAD...)
for key in listkeys(self.get_raw()):
value = {'decoration': 'DEFAULT',
'optional': False,
'additional': False,
'splittable': False}
ret[key] = value
self.views = ret
return self.views
def set_views(self, input_views):
"""Set the views to input_views."""
self.views = input_views
def get_views(self, item=None, key=None, option=None):
"""Return the views object.
If key is None, return all the view for the current plugin
else if option is None return the view for the specific key (all option)
else return the view fo the specific key/option
Specify item if the stats are stored in a dict of dict (ex: NETWORK, FS...)
"""
if item is None:
item_views = self.views
else:
item_views = self.views[item]
if key is None:
return item_views
else:
if option is None:
return item_views[key]
else:
return item_views[key][option]
def load_limits(self, config):
"""Load limits from the configuration file, if it exists."""
if (hasattr(config, 'has_section') and
config.has_section(self.plugin_name)):
for level, _ in config.items(self.plugin_name):
# Read limits
limit = '_'.join([self.plugin_name, level])
try:
self._limits[limit] = config.get_float_value(self.plugin_name, level)
except ValueError:
self._limits[limit] = config.get_value(self.plugin_name, level).split(",")
logger.debug("Load limit: {0} = {1}".format(limit, self._limits[limit]))
@property
def limits(self):
"""Return the limits object."""
return self._limits
@limits.setter
def limits(self, input_limits):
"""Set the limits to input_limits."""
self._limits = input_limits
def get_alert(self, current=0, minimum=0, maximum=100, header="", log=False):
"""Return the alert status relative to a current value.
Use this function for minor stats.
If current < CAREFUL of max then alert = OK
If current > CAREFUL of max then alert = CAREFUL
If current > WARNING of max then alert = WARNING
If current > CRITICAL of max then alert = CRITICAL
If defined 'header' is added between the plugin name and the status.
Only useful for stats with several alert status.
If log=True than add log if necessary
elif log=False than do not log
elig log=None than apply the config given in the conf file
"""
# Compute the %
try:
value = (current * 100) / maximum
except ZeroDivisionError:
return 'DEFAULT'
except TypeError:
return 'DEFAULT'
# Build the stat_name = plugin_name + header
if header == "":
stat_name = self.plugin_name
else:
stat_name = self.plugin_name + '_' + header
# Manage limits
ret = 'OK'
try:
if value > self.__get_limit('critical', stat_name=stat_name):
ret = 'CRITICAL'
elif value > self.__get_limit('warning', stat_name=stat_name):
ret = 'WARNING'
elif value > self.__get_limit('careful', stat_name=stat_name):
ret = 'CAREFUL'
elif current < minimum:
ret = 'CAREFUL'
except KeyError:
return 'DEFAULT'
# Manage log
log_str = ""
if self.__get_limit_log(stat_name=stat_name, default_action=log):
# Add _LOG to the return string
# So stats will be highlited with a specific color
log_str = "_LOG"
# Add the log to the list
glances_logs.add(ret, stat_name.upper(), value, [])
# Manage action
# Here is a command line for the current trigger ?
try:
command = self.__get_limit_action(ret.lower(), stat_name=stat_name)
except KeyError:
# Reset the trigger
self.actions.set(stat_name, ret.lower())
else:
# A command line is available for the current alert, run it
# Build the {{mustache}} dictionnary
if isinstance(self.stats, list):
# If the stats are stored in a list of dict (fs plugin for exemple)
# Return the dict for the current header
mustache_dict = {}
for item in self.stats:
if item[self.get_key()] == header:
mustache_dict = item
break
else:
# Use the stats dict
mustache_dict = self.stats
# Run the action
self.actions.run(
stat_name, ret.lower(), command, mustache_dict=mustache_dict)
# Default is ok
return ret + log_str
def get_alert_log(self, current=0, minimum=0, maximum=100, header=""):
"""Get the alert log."""
return self.get_alert(current, minimum, maximum, header, log=True)
def __get_limit(self, criticity, stat_name=""):
"""Return the limit value for the alert."""
# Get the limit for stat + header
# Exemple: network_wlan0_rx_careful
try:
limit = self._limits[stat_name + '_' + criticity]
except KeyError:
# Try fallback to plugin default limit
# Exemple: network_careful
limit = self._limits[self.plugin_name + '_' + criticity]
# Return the limit
return limit
def __get_limit_action(self, criticity, stat_name=""):
"""Return the action for the alert."""
# Get the action for stat + header
# Exemple: network_wlan0_rx_careful_action
try:
ret = self._limits[stat_name + '_' + criticity + '_action']
except KeyError:
# Try fallback to plugin default limit
# Exemple: network_careful_action
ret = self._limits[self.plugin_name + '_' + criticity + '_action']
# Return the action list
return ret
def __get_limit_log(self, stat_name, default_action=False):
"""Return the log tag for the alert."""
# Get the log tag for stat + header
# Exemple: network_wlan0_rx_log
try:
log_tag = self._limits[stat_name + '_log']
except KeyError:
# Try fallback to plugin default log
# Exemple: network_log
try:
log_tag = self._limits[self.plugin_name + '_log']
except KeyError:
# By defaukt, log are disabled
return default_action
# Return the action list
return log_tag[0].lower() == 'true'
def get_conf_value(self, value, header="", plugin_name=None):
"""Return the configuration (header_) value for the current plugin.
...or the one given by the plugin_name var.
"""
if plugin_name is None:
# If not default use the current plugin name
plugin_name = self.plugin_name
if header != "":
# Add the header
plugin_name = plugin_name + '_' + header
try:
return self._limits[plugin_name + '_' + value]
except KeyError:
return []
def is_hide(self, value, header=""):
"""
Return True if the value is in the hide configuration list.
The hide configuration list is defined in the glances.conf file.
It is a comma separed list of regexp.
Example for diskio:
hide=sda2,sda5,loop.*
"""
# TODO: possible optimisation: create a re.compile list
return not all(j is None for j in [re.match(i, value) for i in self.get_conf_value('hide', header=header)])
def has_alias(self, header):
"""Return the alias name for the relative header or None if nonexist."""
try:
return self._limits[self.plugin_name + '_' + header + '_' + 'alias'][0]
except (KeyError, IndexError):
return None
def msg_curse(self, args=None, max_width=None):
"""Return default string to display in the curse interface."""
return [self.curse_add_line(str(self.stats))]
def get_stats_display(self, args=None, max_width=None):
"""Return a dict with all the information needed to display the stat.
key | description
----------------------------
display | Display the stat (True or False)
msgdict | Message to display (list of dict [{ 'msg': msg, 'decoration': decoration } ... ])
align | Message position
"""
display_curse = False
if hasattr(self, 'display_curse'):
display_curse = self.display_curse
if hasattr(self, 'align'):
align_curse = self._align
if max_width is not None:
ret = {'display': display_curse,
'msgdict': self.msg_curse(args, max_width=max_width),
'align': align_curse}
else:
ret = {'display': display_curse,
'msgdict': self.msg_curse(args),
'align': align_curse}
return ret
def curse_add_line(self, msg, decoration="DEFAULT",
optional=False, additional=False,
splittable=False):
"""Return a dict with.
Where:
msg: string
decoration:
DEFAULT: no decoration
UNDERLINE: underline
BOLD: bold
TITLE: for stat title
PROCESS: for process name
STATUS: for process status
NICE: for process niceness
CPU_TIME: for process cpu time
OK: Value is OK and non logged
OK_LOG: Value is OK and logged
CAREFUL: Value is CAREFUL and non logged
CAREFUL_LOG: Value is CAREFUL and logged
WARNING: Value is WARINING and non logged
WARNING_LOG: Value is WARINING and logged
CRITICAL: Value is CRITICAL and non logged
CRITICAL_LOG: Value is CRITICAL and logged
optional: True if the stat is optional (display only if space is available)
additional: True if the stat is additional (display only if space is available after optional)
spittable: Line can be splitted to fit on the screen (default is not)
"""
return {'msg': msg, 'decoration': decoration, 'optional': optional, 'additional': additional, 'splittable': splittable}
def curse_new_line(self):
"""Go to a new line."""
return self.curse_add_line('\n')
@property
def align(self):
"""Get the curse align."""
return self._align
@align.setter
def align(self, value):
"""Set the curse align.
value: left, right, bottom.
"""
self._align = value
def auto_unit(self, number, low_precision=False):
"""Make a nice human-readable string out of number.
Number of decimal places increases as quantity approaches 1.
examples:
CASE: 613421788 RESULT: 585M low_precision: 585M
CASE: 5307033647 RESULT: 4.94G low_precision: 4.9G
CASE: 44968414685 RESULT: 41.9G low_precision: 41.9G
CASE: 838471403472 RESULT: 781G low_precision: 781G
CASE: 9683209690677 RESULT: 8.81T low_precision: 8.8T
CASE: 1073741824 RESULT: 1024M low_precision: 1024M
CASE: 1181116006 RESULT: 1.10G low_precision: 1.1G
'low_precision=True' returns less decimal places potentially
sacrificing precision for more readability.
"""
symbols = ('K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y')
prefix = {
'Y': 1208925819614629174706176,
'Z': 1180591620717411303424,
'E': 1152921504606846976,
'P': 1125899906842624,
'T': 1099511627776,
'G': 1073741824,
'M': 1048576,
'K': 1024
}
for symbol in reversed(symbols):
value = float(number) / prefix[symbol]
if value > 1:
decimal_precision = 0
if value < 10:
decimal_precision = 2
elif value < 100:
decimal_precision = 1
if low_precision:
if symbol in 'MK':
decimal_precision = 0
else:
decimal_precision = min(1, decimal_precision)
elif symbol in 'K':
decimal_precision = 0
return '{0:.{decimal}f}{symbol}'.format(
value, decimal=decimal_precision, symbol=symbol)
return '{0!s}'.format(number)
def _log_result_decorator(fct):
"""Log (DEBUG) the result of the function fct."""
def wrapper(*args, **kw):
ret = fct(*args, **kw)
logger.debug("%s %s %s return %s" % (
args[0].__class__.__name__,
args[0].__class__.__module__[len('glances_'):],
fct.__name__, ret))
return ret
return wrapper
# Mandatory to call the decorator in childs' classes
_log_result_decorator = staticmethod(_log_result_decorator)
class GlancesPlugin(object):
"""Main class for Glances plugin."""
def __init__(self,
args=None,
items_history_list=None,
stats_init_value={}):
"""Init the plugin of plugins class.
All Glances' plugins should inherit from this class. Most of the
methods are already implemented in the father classes.
Your plugin should return a dict or a list of dicts (stored in the
self.stats). As an example, you can have a look on the mem plugin
(for dict) or network (for list of dicts).
A plugin should implement:
- the __init__ constructor: define the self.display_curse
- the reset method: to set your self.stats variable to {} or []
- the update method: where your self.stats variable is set
and optionnaly:
- the get_key method: set the key of the dict (only for list of dict)
- the update_view method: only if you need to trick your output
- the msg_curse: define the curse (UI) message (if display_curse is True)
:args: args parameters
:items_history_list: list of items to store in the history
:stats_init_value: Default value for a stats item
"""
# Plugin name (= module name without glances_)
self.plugin_name = self.__class__.__module__[len('glances_'):]
# logger.debug("Init plugin %s" % self.plugin_name)
# Init the args
self.args = args
# Init the default alignement (for curses)
self._align = 'left'
# Init the input method
self._input_method = 'local'
self._short_system_name = None
# Init the history list
self.items_history_list = items_history_list
self.stats_history = self.init_stats_history()
# Init the limits dictionnary
self._limits = dict()
# Init the actions
self.actions = GlancesActions(args=args)
# Init the views
self.views = dict()
# Init the stats
self.stats_init_value = stats_init_value
self.stats = None
self.reset()
def __repr__(self):
"""Return the raw stats."""
return self.stats
def __str__(self):
"""Return the human-readable stats."""
return str(self.stats)
def get_init_value(self):
"""Return a copy of the init value."""
return copy.copy(self.stats_init_value)
def reset(self):
"""Reset the stats.
This method should be overwrited by childs' classes.
"""
self.stats = self.get_init_value()
def exit(self):
"""Just log an event when Glances exit."""
logger.debug("Stop the {} plugin".format(self.plugin_name))
def get_key(self):
"""Return the key of the list."""
return None
def is_enable(self, plugin_name=None):
"""Return true if plugin is enabled."""
if not plugin_name:
plugin_name = self.plugin_name
try:
d = getattr(self.args, 'disable_' + plugin_name)
except AttributeError:
return True
else:
return d is False
def is_disable(self, plugin_name=None):
"""Return true if plugin is disabled."""
return not self.is_enable(plugin_name=plugin_name)
def _json_dumps(self, d):
"""Return the object 'd' in a JSON format.
Manage the issue #815 for Windows OS
"""
try:
return json.dumps(d)
except UnicodeDecodeError:
return json.dumps(d, ensure_ascii=False)
def _history_enable(self):
return self.args is not None and not self.args.disable_history and self.get_items_history_list() is not None
def init_stats_history(self):
"""Init the stats history (dict of GlancesAttribute)."""
if self._history_enable():
init_list = [a['name'] for a in self.get_items_history_list()]
logger.debug("Stats history activated for plugin {} (items: {})".format(self.plugin_name, init_list))
return GlancesHistory()
def reset_stats_history(self):
"""Reset the stats history (dict of GlancesAttribute)."""
if self._history_enable():
reset_list = [a['name'] for a in self.get_items_history_list()]
logger.debug("Reset history for plugin {} (items: {})".format(self.plugin_name, reset_list))
self.stats_history.reset()
def update_stats_history(self):
"""Update stats history."""
# If the plugin data is a dict, the dict's key should be used
if self.get_key() is None:
item_name = ''
else:
item_name = self.get_key()
# Build the history
if self.get_export() and self._history_enable():
for i in self.get_items_history_list():
if isinstance(self.get_export(), list):
# Stats is a list of data
# Iter throught it (for exemple, iter throught network
# interface)
for l in self.get_export():
self.stats_history.add(
nativestr(l[item_name]) + '_' + nativestr(i['name']),
l[i['name']],
description=i['description'],
history_max_size=self._limits['history_size'])
else:
# Stats is not a list
# Add the item to the history directly
self.stats_history.add(nativestr(i['name']),
self.get_export()[i['name']],
description=i['description'],
history_max_size=self._limits['history_size'])
def get_items_history_list(self):
"""Return the items history list."""
return self.items_history_list
def get_raw_history(self, item=None, nb=0):
"""Return the history (RAW format).
- the stats history (dict of list) if item is None
- the stats history for the given item (list) instead
- None if item did not exist in the history
"""
s = self.stats_history.get(nb=nb)
if item is None:
return s
else:
if item in s:
return s[item]
else:
return None
def get_json_history(self, item=None, nb=0):
"""Return the history (JSON format).
- the stats history (dict of list) if item is None
- the stats history for the given item (list) instead
- None if item did not exist in the history
Limit to lasts nb items (all if nb=0)
"""
s = self.stats_history.get_json(nb=nb)
if item is None:
return s
else:
if item in s:
return s[item]
else:
return None
def get_export_history(self, item=None):
"""Return the stats history object to export."""
return self.get_raw_history(item=item)
def get_stats_history(self, item=None, nb=0):
"""Return the stats history (JSON format)."""
s = self.get_json_history(nb=nb)
if item is None:
return self._json_dumps(s)
if isinstance(s, dict):
try:
return self._json_dumps({item: s[item]})
except KeyError as e:
logger.error("Cannot get item history {} ({})".format(item, e))
return None
elif isinstance(s, list):
try:
# Source:
# http://stackoverflow.com/questions/4573875/python-get-index-of-dictionary-item-in-list
return self._json_dumps({item: map(itemgetter(item), s)})
except (KeyError, ValueError) as e:
logger.error("Cannot get item history {} ({})".format(item, e))
return None
else:
return None
def get_trend(self, item, nb=6):
"""Get the trend regarding to the last nb values.
The trend is the diff between the mean of the last nb values
and the current one.
"""
raw_history = self.get_raw_history(item=item, nb=nb)
if raw_history is None or len(raw_history) < nb:
return None
last_nb = [v[1] for v in raw_history]
return last_nb[-1] - mean(last_nb[:-1])
@property
def input_method(self):
"""Get the input method."""
return self._input_method
@input_method.setter
def input_method(self, input_method):
"""Set the input method.
* local: system local grab (psutil or direct access)
* snmp: Client server mode via SNMP
* glances: Client server mode via Glances API
"""
self._input_method = input_method
@property
def short_system_name(self):
"""Get the short detected OS name (SNMP)."""
return self._short_system_name
def sorted_stats(self):
"""Get the stats sorted by an alias (if present) or key."""
key = self.get_key()
return sorted(self.stats, key=lambda stat: tuple(map(
lambda part: int(part) if part.isdigit() else part.lower(),
re.split(r"(\d+|\D+)", self.has_alias(stat[key]) or stat[key])
)))
@short_system_name.setter
def short_system_name(self, short_name):
"""Set the short detected OS name (SNMP)."""
self._short_system_name = short_name
def set_stats(self, input_stats):
"""Set the stats to input_stats."""
self.stats = input_stats
def get_stats_snmp(self, bulk=False, snmp_oid=None):
"""Update stats using SNMP.
If bulk=True, use a bulk request instead of a get request.
"""
snmp_oid = snmp_oid or {}
from glances.snmp import GlancesSNMPClient
# Init the SNMP request
clientsnmp = GlancesSNMPClient(host=self.args.client,
port=self.args.snmp_port,
version=self.args.snmp_version,
community=self.args.snmp_community)
# Process the SNMP request
ret = {}
if bulk:
# Bulk request
snmpresult = clientsnmp.getbulk_by_oid(0, 10, itervalues(*snmp_oid))
if len(snmp_oid) == 1:
# Bulk command for only one OID
# Note: key is the item indexed but the OID result
for item in snmpresult:
if iterkeys(item)[0].startswith(itervalues(snmp_oid)[0]):
ret[iterkeys(snmp_oid)[0] + iterkeys(item)
[0].split(itervalues(snmp_oid)[0])[1]] = itervalues(item)[0]
else:
# Build the internal dict with the SNMP result
# Note: key is the first item in the snmp_oid
index = 1
for item in snmpresult:
item_stats = {}
item_key = None
for key in iterkeys(snmp_oid):
oid = snmp_oid[key] + '.' + str(index)
if oid in item:
if item_key is None:
item_key = item[oid]
else:
item_stats[key] = item[oid]
if item_stats:
ret[item_key] = item_stats
index += 1
else:
# Simple get request
snmpresult = clientsnmp.get_by_oid(itervalues(*snmp_oid))
# Build the internal dict with the SNMP result
for key in iterkeys(snmp_oid):
ret[key] = snmpresult[snmp_oid[key]]
return ret
def get_raw(self):
"""Return the stats object."""
return self.stats
def get_export(self):
"""Return the stats object to export."""
return self.get_raw()
def get_stats(self):
"""Return the stats object in JSON format."""
return self._json_dumps(self.stats)
def get_stats_item(self, item):
"""Return the stats object for a specific item in JSON format.
Stats should be a list of dict (processlist, network...)
"""
if isinstance(self.stats, dict):
try:
return self._json_dumps({item: self.stats[item]})
except KeyError as e:
logger.error("Cannot get item {} ({})".format(item, e))
return None
elif isinstance(self.stats, list):
try:
# Source:
# http://stackoverflow.com/questions/4573875/python-get-index-of-dictionary-item-in-list
return self._json_dumps({item: map(itemgetter(item), self.stats)})
except (KeyError, ValueError) as e:
logger.error("Cannot get item {} ({})".format(item, e))
return None
else:
return None
def get_stats_value(self, item, value):
"""Return the stats object for a specific item=value in JSON format.
Stats should be a list of dict (processlist, network...)
"""
if not isinstance(self.stats, list):
return None
else:
if value.isdigit():
value = int(value)
try:
return self._json_dumps({value: [i for i in self.stats if i[item] == value]})
except (KeyError, ValueError) as e:
logger.error(
"Cannot get item({})=value({}) ({})".format(item, value, e))
return None
def update_views(self):
"""Update the stats views.
The V of MVC
A dict of dict with the needed information to display the stats.
Example for the stat xxx:
'xxx': {'decoration': 'DEFAULT',
'optional': False,
'additional': False,
'splittable': False}
"""
ret = {}
if (isinstance(self.get_raw(), list) and
self.get_raw() is not None and
self.get_key() is not None):
# Stats are stored in a list of dict (ex: NETWORK, FS...)
for i in self.get_raw():
ret[i[self.get_key()]] = {}
for key in listkeys(i):
value = {'decoration': 'DEFAULT',
'optional': False,
'additional': False,
'splittable': False}
ret[i[self.get_key()]][key] = value
elif isinstance(self.get_raw(), dict) and self.get_raw() is not None:
# Stats are stored in a dict (ex: CPU, LOAD...)
for key in listkeys(self.get_raw()):
value = {'decoration': 'DEFAULT',
'optional': False,
'additional': False,
'splittable': False}
ret[key] = value
self.views = ret
return self.views
def set_views(self, input_views):
"""Set the views to input_views."""
self.views = input_views
def get_views(self, item=None, key=None, option=None):
"""Return the views object.
If key is None, return all the view for the current plugin
else if option is None return the view for the specific key (all option)
else return the view fo the specific key/option
Specify item if the stats are stored in a dict of dict (ex: NETWORK, FS...)
"""
if item is None:
item_views = self.views
else:
item_views = self.views[item]
if key is None:
return item_views
else:
if option is None:
return item_views[key]
else:
if option in item_views[key]:
return item_views[key][option]
else:
return 'DEFAULT'
def get_json_views(self, item=None, key=None, option=None):
"""Return the views (in JSON)."""
return self._json_dumps(self.get_views(item, key, option))
def load_limits(self, config):
"""Load limits from the configuration file, if it exists."""
# By default set the history length to 3 points per second during one day
self._limits['history_size'] = 28800
if not hasattr(config, 'has_section'):
return False
# Read the global section
if config.has_section('global'):
self._limits['history_size'] = config.get_float_value('global', 'history_size', default=28800)
logger.debug("Load configuration key: {} = {}".format('history_size', self._limits['history_size']))
# Read the plugin specific section
if config.has_section(self.plugin_name):
for level, _ in config.items(self.plugin_name):
# Read limits
limit = '_'.join([self.plugin_name, level])
try:
self._limits[limit] = config.get_float_value(self.plugin_name, level)
except ValueError:
self._limits[limit] = config.get_value(self.plugin_name, level).split(",")
logger.debug("Load limit: {} = {}".format(limit, self._limits[limit]))
return True
@property
def limits(self):
"""Return the limits object."""
return self._limits
@limits.setter
def limits(self, input_limits):
"""Set the limits to input_limits."""
self._limits = input_limits
def get_stats_action(self):
"""Return stats for the action.
By default return all the stats.
Can be overwrite by plugins implementation.
For example, Docker will return self.stats['containers']
"""
return self.stats
def get_stat_name(self, header=""):
""""Return the stat name with an optional header"""
ret = self.plugin_name
if header != "":
ret += '_' + header
return ret
def get_alert(self,
current=0,
minimum=0,
maximum=100,
highlight_zero=True,
is_max=False,
header="",
action_key=None,
log=False):
"""Return the alert status relative to a current value.
Use this function for minor stats.
If current < CAREFUL of max then alert = OK
If current > CAREFUL of max then alert = CAREFUL
If current > WARNING of max then alert = WARNING
If current > CRITICAL of max then alert = CRITICAL
If highlight=True than 0.0 is highlighted
If defined 'header' is added between the plugin name and the status.
Only useful for stats with several alert status.
If defined, 'action_key' define the key for the actions.
By default, the action_key is equal to the header.
If log=True than add log if necessary
elif log=False than do not log
elif log=None than apply the config given in the conf file
"""
# Manage 0 (0.0) value if highlight_zero is not True
if not highlight_zero and current == 0:
return 'DEFAULT'
# Compute the %
try:
value = (current * 100) / maximum
except ZeroDivisionError:
return 'DEFAULT'
except TypeError:
return 'DEFAULT'
# Build the stat_name
stat_name = self.get_stat_name(header=header)
# Manage limits
# If is_max is set then display the value in MAX
ret = 'MAX' if is_max else 'OK'
try:
if value >= self.get_limit('critical', stat_name=stat_name):
ret = 'CRITICAL'
elif value >= self.get_limit('warning', stat_name=stat_name):
ret = 'WARNING'
elif value >= self.get_limit('careful', stat_name=stat_name):
ret = 'CAREFUL'
elif current < minimum:
ret = 'CAREFUL'
except KeyError:
return 'DEFAULT'
# Manage log
log_str = ""
if self.get_limit_log(stat_name=stat_name, default_action=log):
# Add _LOG to the return string
# So stats will be highlited with a specific color
log_str = "_LOG"
# Add the log to the list
glances_events.add(ret, stat_name.upper(), value)
# Manage threshold
self.manage_threshold(stat_name, ret)
# Manage action
self.manage_action(stat_name, ret.lower(), header, action_key)
# Default is 'OK'
return ret + log_str
def manage_threshold(self,
stat_name,
trigger):
"""Manage the threshold for the current stat."""
glances_thresholds.add(stat_name, trigger)
def manage_action(self,
stat_name,
trigger,
header,
action_key):
"""Manage the action for the current stat."""
# Here is a command line for the current trigger ?
try:
command, repeat = self.get_limit_action(trigger, stat_name=stat_name)
except KeyError:
# Reset the trigger
self.actions.set(stat_name, trigger)
else:
# Define the action key for the stats dict
# If not define, then it sets to header
if action_key is None:
action_key = header
# A command line is available for the current alert
# 1) Build the {{mustache}} dictionnary
if isinstance(self.get_stats_action(), list):
# If the stats are stored in a list of dict (fs plugin for exemple)
# Return the dict for the current header
mustache_dict = {}
for item in self.get_stats_action():
if item[self.get_key()] == action_key:
mustache_dict = item
break
else:
# Use the stats dict
mustache_dict = self.get_stats_action()
# 2) Run the action
self.actions.run(
stat_name, trigger,
command, repeat, mustache_dict=mustache_dict)
def get_alert_log(self,
current=0,
minimum=0,
maximum=100,
header="",
action_key=None):
"""Get the alert log."""
return self.get_alert(current=current,
minimum=minimum,
maximum=maximum,
header=header,
action_key=action_key,
log=True)
def get_limit(self, criticity, stat_name=""):
"""Return the limit value for the alert."""
# Get the limit for stat + header
# Exemple: network_wlan0_rx_careful
try:
limit = self._limits[stat_name + '_' + criticity]
except KeyError:
# Try fallback to plugin default limit
# Exemple: network_careful
limit = self._limits[self.plugin_name + '_' + criticity]
# logger.debug("{} {} value is {}".format(stat_name, criticity, limit))
# Return the limiter
return limit
def get_limit_action(self, criticity, stat_name=""):
"""Return the tuple (action, repeat) for the alert.
- action is a command line
- repeat is a bool
"""
# Get the action for stat + header
# Exemple: network_wlan0_rx_careful_action
# Action key available ?
ret = [(stat_name + '_' + criticity + '_action', False),
(stat_name + '_' + criticity + '_action_repeat', True),
(self.plugin_name + '_' + criticity + '_action', False),
(self.plugin_name + '_' + criticity + '_action_repeat', True)]
for r in ret:
if r[0] in self._limits:
return self._limits[r[0]], r[1]
# No key found, the raise an error
raise KeyError
def get_limit_log(self, stat_name, default_action=False):
"""Return the log tag for the alert."""
# Get the log tag for stat + header
# Exemple: network_wlan0_rx_log
try:
log_tag = self._limits[stat_name + '_log']
except KeyError:
# Try fallback to plugin default log
# Exemple: network_log
try:
log_tag = self._limits[self.plugin_name + '_log']
except KeyError:
# By defaukt, log are disabled
return default_action
# Return the action list
return log_tag[0].lower() == 'true'
def get_conf_value(self, value, header="", plugin_name=None):
"""Return the configuration (header_) value for the current plugin.
...or the one given by the plugin_name var.
"""
if plugin_name is None:
# If not default use the current plugin name
plugin_name = self.plugin_name
if header != "":
# Add the header
plugin_name = plugin_name + '_' + header
try:
return self._limits[plugin_name + '_' + value]
except KeyError:
return []
def is_hide(self, value, header=""):
"""Return True if the value is in the hide configuration list.
The hide configuration list is defined in the glances.conf file.
It is a comma separed list of regexp.
Example for diskio:
hide=sda2,sda5,loop.*
"""
# TODO: possible optimisation: create a re.compile list
return not all(j is None for j in [re.match(i, value.lower()) for i in self.get_conf_value('hide', header=header)])
def has_alias(self, header):
"""Return the alias name for the relative header or None if nonexist."""
try:
# Force to lower case (issue #1126)
return self._limits[self.plugin_name + '_' + header.lower() + '_' + 'alias'][0]
except (KeyError, IndexError):
# logger.debug("No alias found for {}".format(header))
return None
def msg_curse(self, args=None, max_width=None):
"""Return default string to display in the curse interface."""
return [self.curse_add_line(str(self.stats))]
def get_stats_display(self, args=None, max_width=None):
"""Return a dict with all the information needed to display the stat.
key | description
----------------------------
display | Display the stat (True or False)
msgdict | Message to display (list of dict [{ 'msg': msg, 'decoration': decoration } ... ])
align | Message position
"""
display_curse = False
if hasattr(self, 'display_curse'):
display_curse = self.display_curse
if hasattr(self, 'align'):
align_curse = self._align
if max_width is not None:
ret = {'display': display_curse,
'msgdict': self.msg_curse(args, max_width=max_width),
'align': align_curse}
else:
ret = {'display': display_curse,
'msgdict': self.msg_curse(args),
'align': align_curse}
return ret
def curse_add_line(self, msg, decoration="DEFAULT",
optional=False, additional=False,
splittable=False):
"""Return a dict with.
Where:
msg: string
decoration:
DEFAULT: no decoration
UNDERLINE: underline
BOLD: bold
TITLE: for stat title
PROCESS: for process name
STATUS: for process status
NICE: for process niceness
CPU_TIME: for process cpu time
OK: Value is OK and non logged
OK_LOG: Value is OK and logged
CAREFUL: Value is CAREFUL and non logged
CAREFUL_LOG: Value is CAREFUL and logged
WARNING: Value is WARINING and non logged
WARNING_LOG: Value is WARINING and logged
CRITICAL: Value is CRITICAL and non logged
CRITICAL_LOG: Value is CRITICAL and logged
optional: True if the stat is optional (display only if space is available)
additional: True if the stat is additional (display only if space is available after optional)
spittable: Line can be splitted to fit on the screen (default is not)
"""
return {'msg': msg, 'decoration': decoration, 'optional': optional, 'additional': additional, 'splittable': splittable}
def curse_new_line(self):
"""Go to a new line."""
return self.curse_add_line('\n')
@property
def align(self):
"""Get the curse align."""
return self._align
@align.setter
def align(self, value):
"""Set the curse align.
value: left, right, bottom.
"""
self._align = value
def auto_unit(self, number,
low_precision=False,
min_symbol='K'
):
"""Make a nice human-readable string out of number.
Number of decimal places increases as quantity approaches 1.
CASE: 613421788 RESULT: 585M low_precision: 585M
CASE: 5307033647 RESULT: 4.94G low_precision: 4.9G
CASE: 44968414685 RESULT: 41.9G low_precision: 41.9G
CASE: 838471403472 RESULT: 781G low_precision: 781G
CASE: 9683209690677 RESULT: 8.81T low_precision: 8.8T
CASE: 1073741824 RESULT: 1024M low_precision: 1024M
CASE: 1181116006 RESULT: 1.10G low_precision: 1.1G
:low_precision: returns less decimal places potentially (default is False)
sacrificing precision for more readability.
:min_symbol: Do not approache if number < min_symbol (default is K)
"""
symbols = ('K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y')
if min_symbol in symbols:
symbols = symbols[symbols.index(min_symbol):]
prefix = {
'Y': 1208925819614629174706176,
'Z': 1180591620717411303424,
'E': 1152921504606846976,
'P': 1125899906842624,
'T': 1099511627776,
'G': 1073741824,
'M': 1048576,
'K': 1024
}
for symbol in reversed(symbols):
value = float(number) / prefix[symbol]
if value > 1:
decimal_precision = 0
if value < 10:
decimal_precision = 2
elif value < 100:
decimal_precision = 1
if low_precision:
if symbol in 'MK':
decimal_precision = 0
else:
decimal_precision = min(1, decimal_precision)
elif symbol in 'K':
decimal_precision = 0
return '{:.{decimal}f}{symbol}'.format(
value, decimal=decimal_precision, symbol=symbol)
return '{!s}'.format(number)
def trend_msg(self, trend, significant=1):
"""Return the trend message.
Do not take into account if trend < significant
"""
ret = '-'
if trend is None:
ret = ' '
elif trend > significant:
ret = '/'
elif trend < -significant:
ret = '\\'
return ret
def _check_decorator(fct):
"""Check if the plugin is enabled."""
def wrapper(self, *args, **kw):
if self.is_enable():
ret = fct(self, *args, **kw)
else:
ret = self.stats
return ret
return wrapper
def _log_result_decorator(fct):
"""Log (DEBUG) the result of the function fct."""
def wrapper(*args, **kw):
ret = fct(*args, **kw)
logger.debug("%s %s %s return %s" % (
args[0].__class__.__name__,
args[0].__class__.__module__[len('glances_'):],
fct.__name__, ret))
return ret
return wrapper
# Mandatory to call the decorator in childs' classes
_check_decorator = staticmethod(_check_decorator)
_log_result_decorator = staticmethod(_log_result_decorator)
class GlancesPlugin(object):
"""Main class for Glances plugin."""
def __init__(self,
args=None,
items_history_list=None,
stats_init_value={}):
"""Init the plugin of plugins class.
All Glances' plugins should inherit from this class. Most of the
methods are already implemented in the father classes.
Your plugin should return a dict or a list of dicts (stored in the
self.stats). As an example, you can have a look on the mem plugin
(for dict) or network (for list of dicts).
A plugin should implement:
- the __init__ constructor: define the self.display_curse
- the reset method: to set your self.stats variable to {} or []
- the update method: where your self.stats variable is set
and optionnaly:
- the get_key method: set the key of the dict (only for list of dict)
- the update_view method: only if you need to trick your output
- the msg_curse: define the curse (UI) message (if display_curse is True)
:args: args parameters
:items_history_list: list of items to store in the history
:stats_init_value: Default value for a stats item
"""
# Plugin name (= module name without glances_)
self.plugin_name = self.__class__.__module__[len('glances_'):]
# logger.debug("Init plugin %s" % self.plugin_name)
# Init the args
self.args = args
# Init the default alignement (for curses)
self._align = 'left'
# Init the input method
self._input_method = 'local'
self._short_system_name = None
# Init the history list
self.items_history_list = items_history_list
self.stats_history = self.init_stats_history()
# Init the limits dictionnary
self._limits = dict()
# Init the actions
self.actions = GlancesActions(args=args)
# Init the views
self.views = dict()
# Init the stats
self.stats_init_value = stats_init_value
self.stats = None
self.reset()
def __repr__(self):
"""Return the raw stats."""
return self.stats
def __str__(self):
"""Return the human-readable stats."""
return str(self.stats)
def get_init_value(self):
"""Return a copy of the init value."""
return copy.copy(self.stats_init_value)
def reset(self):
"""Reset the stats.
This method should be overwrited by childs' classes.
"""
self.stats = self.get_init_value()
def exit(self):
"""Just log an event when Glances exit."""
logger.debug("Stop the {} plugin".format(self.plugin_name))
def get_key(self):
"""Return the key of the list."""
return None
def is_enable(self, plugin_name=None):
"""Return true if plugin is enabled."""
if not plugin_name:
plugin_name = self.plugin_name
try:
d = getattr(self.args, 'disable_' + plugin_name)
except AttributeError:
return True
else:
return d is False
def is_disable(self, plugin_name=None):
"""Return true if plugin is disabled."""
return not self.is_enable(plugin_name=plugin_name)
def _json_dumps(self, d):
"""Return the object 'd' in a JSON format.
Manage the issue #815 for Windows OS
"""
try:
return json.dumps(d)
except UnicodeDecodeError:
return json.dumps(d, ensure_ascii=False)
def _history_enable(self):
return self.args is not None and not self.args.disable_history and self.get_items_history_list(
) is not None
def init_stats_history(self):
"""Init the stats history (dict of GlancesAttribute)."""
if self._history_enable():
init_list = [a['name'] for a in self.get_items_history_list()]
logger.debug(
"Stats history activated for plugin {} (items: {})".format(
self.plugin_name, init_list))
return GlancesHistory()
def reset_stats_history(self):
"""Reset the stats history (dict of GlancesAttribute)."""
if self._history_enable():
reset_list = [a['name'] for a in self.get_items_history_list()]
logger.debug("Reset history for plugin {} (items: {})".format(
self.plugin_name, reset_list))
self.stats_history.reset()
def update_stats_history(self):
"""Update stats history."""
# If the plugin data is a dict, the dict's key should be used
if self.get_key() is None:
item_name = ''
else:
item_name = self.get_key()
# Build the history
if self.get_export() and self._history_enable():
for i in self.get_items_history_list():
if isinstance(self.get_export(), list):
# Stats is a list of data
# Iter throught it (for exemple, iter throught network
# interface)
for l in self.get_export():
self.stats_history.add(
str(l[item_name]) + '_' + i['name'],
l[i['name']],
description=i['description'],
history_max_size=self._limits['history_size'])
else:
# Stats is not a list
# Add the item to the history directly
self.stats_history.add(
i['name'],
self.get_export()[i['name']],
description=i['description'],
history_max_size=self._limits['history_size'])
def get_items_history_list(self):
"""Return the items history list."""
return self.items_history_list
def get_raw_history(self, item=None, nb=0):
"""Return the history (RAW format).
- the stats history (dict of list) if item is None
- the stats history for the given item (list) instead
- None if item did not exist in the history
"""
s = self.stats_history.get(nb=nb)
if item is None:
return s
else:
if item in s:
return s[item]
else:
return None
def get_json_history(self, item=None, nb=0):
"""Return the history (JSON format).
- the stats history (dict of list) if item is None
- the stats history for the given item (list) instead
- None if item did not exist in the history
Limit to lasts nb items (all if nb=0)
"""
s = self.stats_history.get_json(nb=nb)
if item is None:
return s
else:
if item in s:
return s[item]
else:
return None
def get_export_history(self, item=None):
"""Return the stats history object to export."""
return self.get_raw_history(item=item)
def get_stats_history(self, item=None, nb=0):
"""Return the stats history (JSON format)."""
s = self.get_json_history(nb=nb)
if item is None:
return self._json_dumps(s)
if isinstance(s, dict):
try:
return self._json_dumps({item: s[item]})
except KeyError as e:
logger.error("Cannot get item history {} ({})".format(item, e))
return None
elif isinstance(s, list):
try:
# Source:
# http://stackoverflow.com/questions/4573875/python-get-index-of-dictionary-item-in-list
return self._json_dumps({item: map(itemgetter(item), s)})
except (KeyError, ValueError) as e:
logger.error("Cannot get item history {} ({})".format(item, e))
return None
else:
return None
def get_trend(self, item, nb=6):
"""Get the trend regarding to the last nb values.
The trend is the diff between the mean of the last nb values
and the current one.
"""
raw_history = self.get_raw_history(item=item, nb=nb)
if raw_history is None or len(raw_history) < nb:
return None
last_nb = [v[1] for v in raw_history]
return last_nb[-1] - mean(last_nb[:-1])
@property
def input_method(self):
"""Get the input method."""
return self._input_method
@input_method.setter
def input_method(self, input_method):
"""Set the input method.
* local: system local grab (psutil or direct access)
* snmp: Client server mode via SNMP
* glances: Client server mode via Glances API
"""
self._input_method = input_method
@property
def short_system_name(self):
"""Get the short detected OS name (SNMP)."""
return self._short_system_name
def sorted_stats(self):
"""Get the stats sorted by an alias (if present) or key."""
key = self.get_key()
return sorted(
self.stats,
key=lambda stat: tuple(
map(
lambda part: int(part) if part.isdigit() else part.lower(),
re.split(r"(\d+|\D+)",
self.has_alias(stat[key]) or stat[key]))))
@short_system_name.setter
def short_system_name(self, short_name):
"""Set the short detected OS name (SNMP)."""
self._short_system_name = short_name
def set_stats(self, input_stats):
"""Set the stats to input_stats."""
self.stats = input_stats
def get_stats_snmp(self, bulk=False, snmp_oid=None):
"""Update stats using SNMP.
If bulk=True, use a bulk request instead of a get request.
"""
snmp_oid = snmp_oid or {}
from glances.snmp import GlancesSNMPClient
# Init the SNMP request
clientsnmp = GlancesSNMPClient(host=self.args.client,
port=self.args.snmp_port,
version=self.args.snmp_version,
community=self.args.snmp_community)
# Process the SNMP request
ret = {}
if bulk:
# Bulk request
snmpresult = clientsnmp.getbulk_by_oid(0, 10,
itervalues(*snmp_oid))
if len(snmp_oid) == 1:
# Bulk command for only one OID
# Note: key is the item indexed but the OID result
for item in snmpresult:
if iterkeys(item)[0].startswith(itervalues(snmp_oid)[0]):
ret[iterkeys(snmp_oid)[0] + iterkeys(item)[0].split(
itervalues(snmp_oid)[0])[1]] = itervalues(item)[0]
else:
# Build the internal dict with the SNMP result
# Note: key is the first item in the snmp_oid
index = 1
for item in snmpresult:
item_stats = {}
item_key = None
for key in iterkeys(snmp_oid):
oid = snmp_oid[key] + '.' + str(index)
if oid in item:
if item_key is None:
item_key = item[oid]
else:
item_stats[key] = item[oid]
if item_stats:
ret[item_key] = item_stats
index += 1
else:
# Simple get request
snmpresult = clientsnmp.get_by_oid(itervalues(*snmp_oid))
# Build the internal dict with the SNMP result
for key in iterkeys(snmp_oid):
ret[key] = snmpresult[snmp_oid[key]]
return ret
def get_raw(self):
"""Return the stats object."""
return self.stats
def get_export(self):
"""Return the stats object to export."""
return self.get_raw()
def get_stats(self):
"""Return the stats object in JSON format."""
return self._json_dumps(self.stats)
def get_stats_item(self, item):
"""Return the stats object for a specific item in JSON format.
Stats should be a list of dict (processlist, network...)
"""
if isinstance(self.stats, dict):
try:
return self._json_dumps({item: self.stats[item]})
except KeyError as e:
logger.error("Cannot get item {} ({})".format(item, e))
return None
elif isinstance(self.stats, list):
try:
# Source:
# http://stackoverflow.com/questions/4573875/python-get-index-of-dictionary-item-in-list
return self._json_dumps(
{item: map(itemgetter(item), self.stats)})
except (KeyError, ValueError) as e:
logger.error("Cannot get item {} ({})".format(item, e))
return None
else:
return None
def get_stats_value(self, item, value):
"""Return the stats object for a specific item=value in JSON format.
Stats should be a list of dict (processlist, network...)
"""
if not isinstance(self.stats, list):
return None
else:
if value.isdigit():
value = int(value)
try:
return self._json_dumps(
{value: [i for i in self.stats if i[item] == value]})
except (KeyError, ValueError) as e:
logger.error("Cannot get item({})=value({}) ({})".format(
item, value, e))
return None
def update_views(self):
"""Update the stats views.
The V of MVC
A dict of dict with the needed information to display the stats.
Example for the stat xxx:
'xxx': {'decoration': 'DEFAULT',
'optional': False,
'additional': False,
'splittable': False}
"""
ret = {}
if (isinstance(self.get_raw(), list) and self.get_raw() is not None
and self.get_key() is not None):
# Stats are stored in a list of dict (ex: NETWORK, FS...)
for i in self.get_raw():
ret[i[self.get_key()]] = {}
for key in listkeys(i):
value = {
'decoration': 'DEFAULT',
'optional': False,
'additional': False,
'splittable': False
}
ret[i[self.get_key()]][key] = value
elif isinstance(self.get_raw(), dict) and self.get_raw() is not None:
# Stats are stored in a dict (ex: CPU, LOAD...)
for key in listkeys(self.get_raw()):
value = {
'decoration': 'DEFAULT',
'optional': False,
'additional': False,
'splittable': False
}
ret[key] = value
self.views = ret
return self.views
def set_views(self, input_views):
"""Set the views to input_views."""
self.views = input_views
def get_views(self, item=None, key=None, option=None):
"""Return the views object.
If key is None, return all the view for the current plugin
else if option is None return the view for the specific key (all option)
else return the view fo the specific key/option
Specify item if the stats are stored in a dict of dict (ex: NETWORK, FS...)
"""
if item is None:
item_views = self.views
else:
item_views = self.views[item]
if key is None:
return item_views
else:
if option is None:
return item_views[key]
else:
if option in item_views[key]:
return item_views[key][option]
else:
return 'DEFAULT'
def get_json_views(self, item=None, key=None, option=None):
"""Return the views (in JSON)."""
return self._json_dumps(self.get_views(item, key, option))
def load_limits(self, config):
"""Load limits from the configuration file, if it exists."""
# By default set the history length to 3 points per second during one day
self._limits['history_size'] = 28800
if not hasattr(config, 'has_section'):
return False
# Read the global section
if config.has_section('global'):
self._limits['history_size'] = config.get_float_value(
'global', 'history_size', default=28800)
logger.debug("Load configuration key: {} = {}".format(
'history_size', self._limits['history_size']))
# Read the plugin specific section
if config.has_section(self.plugin_name):
for level, _ in config.items(self.plugin_name):
# Read limits
limit = '_'.join([self.plugin_name, level])
try:
self._limits[limit] = config.get_float_value(
self.plugin_name, level)
except ValueError:
self._limits[limit] = config.get_value(
self.plugin_name, level).split(",")
logger.debug("Load limit: {} = {}".format(
limit, self._limits[limit]))
return True
@property
def limits(self):
"""Return the limits object."""
return self._limits
@limits.setter
def limits(self, input_limits):
"""Set the limits to input_limits."""
self._limits = input_limits
def get_stats_action(self):
"""Return stats for the action.
By default return all the stats.
Can be overwrite by plugins implementation.
For example, Docker will return self.stats['containers']
"""
return self.stats
def get_alert(self,
current=0,
minimum=0,
maximum=100,
highlight_zero=True,
is_max=False,
header="",
action_key=None,
log=False):
"""Return the alert status relative to a current value.
Use this function for minor stats.
If current < CAREFUL of max then alert = OK
If current > CAREFUL of max then alert = CAREFUL
If current > WARNING of max then alert = WARNING
If current > CRITICAL of max then alert = CRITICAL
If highlight=True than 0.0 is highlighted
If defined 'header' is added between the plugin name and the status.
Only useful for stats with several alert status.
If defined, 'action_key' define the key for the actions.
By default, the action_key is equal to the header.
If log=True than add log if necessary
elif log=False than do not log
elif log=None than apply the config given in the conf file
"""
# Manage 0 (0.0) value if highlight_zero is not True
if not highlight_zero and current == 0:
return 'DEFAULT'
# Compute the %
try:
value = (current * 100) / maximum
except ZeroDivisionError:
return 'DEFAULT'
except TypeError:
return 'DEFAULT'
# Build the stat_name = plugin_name + header
if header == "":
stat_name = self.plugin_name
else:
stat_name = self.plugin_name + '_' + header
# Manage limits
# If is_max is set then display the value in MAX
ret = 'MAX' if is_max else 'OK'
try:
if value >= self.get_limit('critical', stat_name=stat_name):
ret = 'CRITICAL'
elif value >= self.get_limit('warning', stat_name=stat_name):
ret = 'WARNING'
elif value >= self.get_limit('careful', stat_name=stat_name):
ret = 'CAREFUL'
elif current < minimum:
ret = 'CAREFUL'
except KeyError:
return 'DEFAULT'
# Manage log
log_str = ""
if self.get_limit_log(stat_name=stat_name, default_action=log):
# Add _LOG to the return string
# So stats will be highlited with a specific color
log_str = "_LOG"
# Add the log to the list
glances_logs.add(ret, stat_name.upper(), value)
# Manage threshold
self.manage_threshold(stat_name, ret)
# Manage action
self.manage_action(stat_name, ret.lower(), header, action_key)
# Default is 'OK'
return ret + log_str
def manage_threshold(self, stat_name, trigger):
"""Manage the threshold for the current stat."""
glances_thresholds.add(stat_name, trigger)
# logger.info(glances_thresholds.get())
def manage_action(self, stat_name, trigger, header, action_key):
"""Manage the action for the current stat."""
# Here is a command line for the current trigger ?
try:
command, repeat = self.get_limit_action(trigger,
stat_name=stat_name)
except KeyError:
# Reset the trigger
self.actions.set(stat_name, trigger)
else:
# Define the action key for the stats dict
# If not define, then it sets to header
if action_key is None:
action_key = header
# A command line is available for the current alert
# 1) Build the {{mustache}} dictionnary
if isinstance(self.get_stats_action(), list):
# If the stats are stored in a list of dict (fs plugin for exemple)
# Return the dict for the current header
mustache_dict = {}
for item in self.get_stats_action():
if item[self.get_key()] == action_key:
mustache_dict = item
break
else:
# Use the stats dict
mustache_dict = self.get_stats_action()
# 2) Run the action
self.actions.run(stat_name,
trigger,
command,
repeat,
mustache_dict=mustache_dict)
def get_alert_log(self,
current=0,
minimum=0,
maximum=100,
header="",
action_key=None):
"""Get the alert log."""
return self.get_alert(current=current,
minimum=minimum,
maximum=maximum,
header=header,
action_key=action_key,
log=True)
def get_limit(self, criticity, stat_name=""):
"""Return the limit value for the alert."""
# Get the limit for stat + header
# Exemple: network_wlan0_rx_careful
try:
limit = self._limits[stat_name + '_' + criticity]
except KeyError:
# Try fallback to plugin default limit
# Exemple: network_careful
limit = self._limits[self.plugin_name + '_' + criticity]
# logger.debug("{} {} value is {}".format(stat_name, criticity, limit))
# Return the limit
return limit
def get_limit_action(self, criticity, stat_name=""):
"""Return the tuple (action, repeat) for the alert.
- action is a command line
- repeat is a bool
"""
# Get the action for stat + header
# Exemple: network_wlan0_rx_careful_action
# Action key available ?
ret = [(stat_name + '_' + criticity + '_action', False),
(stat_name + '_' + criticity + '_action_repeat', True),
(self.plugin_name + '_' + criticity + '_action', False),
(self.plugin_name + '_' + criticity + '_action_repeat', True)]
for r in ret:
if r[0] in self._limits:
return self._limits[r[0]], r[1]
# No key found, the raise an error
raise KeyError
def get_limit_log(self, stat_name, default_action=False):
"""Return the log tag for the alert."""
# Get the log tag for stat + header
# Exemple: network_wlan0_rx_log
try:
log_tag = self._limits[stat_name + '_log']
except KeyError:
# Try fallback to plugin default log
# Exemple: network_log
try:
log_tag = self._limits[self.plugin_name + '_log']
except KeyError:
# By defaukt, log are disabled
return default_action
# Return the action list
return log_tag[0].lower() == 'true'
def get_conf_value(self, value, header="", plugin_name=None):
"""Return the configuration (header_) value for the current plugin.
...or the one given by the plugin_name var.
"""
if plugin_name is None:
# If not default use the current plugin name
plugin_name = self.plugin_name
if header != "":
# Add the header
plugin_name = plugin_name + '_' + header
try:
return self._limits[plugin_name + '_' + value]
except KeyError:
return []
def is_hide(self, value, header=""):
"""Return True if the value is in the hide configuration list.
The hide configuration list is defined in the glances.conf file.
It is a comma separed list of regexp.
Example for diskio:
hide=sda2,sda5,loop.*
"""
# TODO: possible optimisation: create a re.compile list
return not all(j is None for j in [
re.match(i, value.lower())
for i in self.get_conf_value('hide', header=header)
])
def has_alias(self, header):
"""Return the alias name for the relative header or None if nonexist."""
try:
# Force to lower case (issue #1126)
return self._limits[self.plugin_name + '_' + header.lower() + '_' +
'alias'][0]
except (KeyError, IndexError):
# logger.debug("No alias found for {}".format(header))
return None
def msg_curse(self, args=None, max_width=None):
"""Return default string to display in the curse interface."""
return [self.curse_add_line(str(self.stats))]
def get_stats_display(self, args=None, max_width=None):
"""Return a dict with all the information needed to display the stat.
key | description
----------------------------
display | Display the stat (True or False)
msgdict | Message to display (list of dict [{ 'msg': msg, 'decoration': decoration } ... ])
align | Message position
"""
display_curse = False
if hasattr(self, 'display_curse'):
display_curse = self.display_curse
if hasattr(self, 'align'):
align_curse = self._align
if max_width is not None:
ret = {
'display': display_curse,
'msgdict': self.msg_curse(args, max_width=max_width),
'align': align_curse
}
else:
ret = {
'display': display_curse,
'msgdict': self.msg_curse(args),
'align': align_curse
}
return ret
def curse_add_line(self,
msg,
decoration="DEFAULT",
optional=False,
additional=False,
splittable=False):
"""Return a dict with.
Where:
msg: string
decoration:
DEFAULT: no decoration
UNDERLINE: underline
BOLD: bold
TITLE: for stat title
PROCESS: for process name
STATUS: for process status
NICE: for process niceness
CPU_TIME: for process cpu time
OK: Value is OK and non logged
OK_LOG: Value is OK and logged
CAREFUL: Value is CAREFUL and non logged
CAREFUL_LOG: Value is CAREFUL and logged
WARNING: Value is WARINING and non logged
WARNING_LOG: Value is WARINING and logged
CRITICAL: Value is CRITICAL and non logged
CRITICAL_LOG: Value is CRITICAL and logged
optional: True if the stat is optional (display only if space is available)
additional: True if the stat is additional (display only if space is available after optional)
spittable: Line can be splitted to fit on the screen (default is not)
"""
return {
'msg': msg,
'decoration': decoration,
'optional': optional,
'additional': additional,
'splittable': splittable
}
def curse_new_line(self):
"""Go to a new line."""
return self.curse_add_line('\n')
@property
def align(self):
"""Get the curse align."""
return self._align
@align.setter
def align(self, value):
"""Set the curse align.
value: left, right, bottom.
"""
self._align = value
def auto_unit(self, number, low_precision=False, min_symbol='K'):
"""Make a nice human-readable string out of number.
Number of decimal places increases as quantity approaches 1.
CASE: 613421788 RESULT: 585M low_precision: 585M
CASE: 5307033647 RESULT: 4.94G low_precision: 4.9G
CASE: 44968414685 RESULT: 41.9G low_precision: 41.9G
CASE: 838471403472 RESULT: 781G low_precision: 781G
CASE: 9683209690677 RESULT: 8.81T low_precision: 8.8T
CASE: 1073741824 RESULT: 1024M low_precision: 1024M
CASE: 1181116006 RESULT: 1.10G low_precision: 1.1G
:low_precision: returns less decimal places potentially (default is False)
sacrificing precision for more readability.
:min_symbol: Do not approache if number < min_symbol (default is K)
"""
symbols = ('K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y')
if min_symbol in symbols:
symbols = symbols[symbols.index(min_symbol):]
prefix = {
'Y': 1208925819614629174706176,
'Z': 1180591620717411303424,
'E': 1152921504606846976,
'P': 1125899906842624,
'T': 1099511627776,
'G': 1073741824,
'M': 1048576,
'K': 1024
}
for symbol in reversed(symbols):
value = float(number) / prefix[symbol]
if value > 1:
decimal_precision = 0
if value < 10:
decimal_precision = 2
elif value < 100:
decimal_precision = 1
if low_precision:
if symbol in 'MK':
decimal_precision = 0
else:
decimal_precision = min(1, decimal_precision)
elif symbol in 'K':
decimal_precision = 0
return '{:.{decimal}f}{symbol}'.format(
value, decimal=decimal_precision, symbol=symbol)
return '{!s}'.format(number)
def trend_msg(self, trend, significant=1):
"""Return the trend message.
Do not take into account if trend < significant
"""
ret = '-'
if trend is None:
ret = ' '
elif trend > significant:
ret = '/'
elif trend < -significant:
ret = '\\'
return ret
def _check_decorator(fct):
"""Check if the plugin is enabled."""
def wrapper(self, *args, **kw):
if self.is_enable():
ret = fct(self, *args, **kw)
else:
ret = self.stats
return ret
return wrapper
def _log_result_decorator(fct):
"""Log (DEBUG) the result of the function fct."""
def wrapper(*args, **kw):
ret = fct(*args, **kw)
logger.debug("%s %s %s return %s" %
(args[0].__class__.__name__,
args[0].__class__.__module__[len('glances_'):],
fct.__name__, ret))
return ret
return wrapper
# Mandatory to call the decorator in childs' classes
_check_decorator = staticmethod(_check_decorator)
_log_result_decorator = staticmethod(_log_result_decorator)
class GlancesPlugin(object):
"""Main class for Glances plugin."""
def __init__(self, args=None, items_history_list=None):
"""Init the plugin of plugins class."""
# Plugin name (= module name without glances_)
self.plugin_name = self.__class__.__module__[len('glances_'):]
# logger.debug("Init plugin %s" % self.plugin_name)
# Init the args
self.args = args
# Init the default alignement (for curses)
self._align = 'left'
# Init the input method
self._input_method = 'local'
self._short_system_name = None
# Init the stats list
self.stats = None
# Init the history list
self.items_history_list = items_history_list
self.stats_history = self.init_stats_history()
# Init the limits dictionnary
self._limits = dict()
# Init the actions
self.actions = GlancesActions(args=args)
# Init the views
self.views = dict()
def exit(self):
"""Method to be called when Glances exit"""
logger.debug("Stop the {0} plugin".format(self.plugin_name))
def __repr__(self):
"""Return the raw stats."""
return self.stats
def __str__(self):
"""Return the human-readable stats."""
return str(self.stats)
def get_key(self):
"""Return the key of the list."""
return None
def add_item_history(self, key, value):
"""Add an new item (key, value) to the current history."""
try:
self.stats_history[key].append(value)
except KeyError:
self.stats_history[key] = [value]
def init_stats_history(self):
"""Init the stats history (dict of list)."""
ret = None
if self.args is not None and self.args.enable_history and self.get_items_history_list(
) is not None:
init_list = [i['name'] for i in self.get_items_history_list()]
logger.debug(
"Stats history activated for plugin {0} (items: {1})".format(
self.plugin_name, init_list))
ret = {}
return ret
def reset_stats_history(self):
"""Reset the stats history (dict of list)."""
if self.args is not None and self.args.enable_history and self.get_items_history_list(
) is not None:
reset_list = [i['name'] for i in self.get_items_history_list()]
logger.debug("Reset history for plugin {0} (items: {1})".format(
self.plugin_name, reset_list))
self.stats_history = {}
def update_stats_history(self, item_name=''):
"""Update stats history."""
if (self.stats and self.args is not None and self.args.enable_history
and self.get_items_history_list() is not None):
self.add_item_history('date', datetime.now())
for i in self.get_items_history_list():
if isinstance(self.stats, list):
# Stats is a list of data
# Iter throught it (for exemple, iter throught network
# interface)
for l in self.stats:
self.add_item_history(l[item_name] + '_' + i['name'],
l[i['name']])
else:
# Stats is not a list
# Add the item to the history directly
self.add_item_history(i['name'], self.stats[i['name']])
def get_stats_history(self):
"""Return the stats history."""
return self.stats_history
def get_items_history_list(self):
"""Return the items history list."""
return self.items_history_list
@property
def input_method(self):
"""Get the input method."""
return self._input_method
@input_method.setter
def input_method(self, input_method):
"""Set the input method.
* local: system local grab (psutil or direct access)
* snmp: Client server mode via SNMP
* glances: Client server mode via Glances API
"""
self._input_method = input_method
@property
def short_system_name(self):
"""Get the short detected OS name (SNMP)."""
return self._short_system_name
@short_system_name.setter
def short_system_name(self, short_name):
"""Set the short detected OS name (SNMP)."""
self._short_system_name = short_name
def set_stats(self, input_stats):
"""Set the stats to input_stats."""
self.stats = input_stats
def get_stats_snmp(self, bulk=False, snmp_oid=None):
"""Update stats using SNMP.
If bulk=True, use a bulk request instead of a get request.
"""
snmp_oid = snmp_oid or {}
from glances.snmp import GlancesSNMPClient
# Init the SNMP request
clientsnmp = GlancesSNMPClient(host=self.args.client,
port=self.args.snmp_port,
version=self.args.snmp_version,
community=self.args.snmp_community)
# Process the SNMP request
ret = {}
if bulk:
# Bulk request
snmpresult = clientsnmp.getbulk_by_oid(0, 10,
itervalues(*snmp_oid))
if len(snmp_oid) == 1:
# Bulk command for only one OID
# Note: key is the item indexed but the OID result
for item in snmpresult:
if iterkeys(item)[0].startswith(itervalues(snmp_oid)[0]):
ret[iterkeys(snmp_oid)[0] + iterkeys(item)[0].split(
itervalues(snmp_oid)[0])[1]] = itervalues(item)[0]
else:
# Build the internal dict with the SNMP result
# Note: key is the first item in the snmp_oid
index = 1
for item in snmpresult:
item_stats = {}
item_key = None
for key in iterkeys(snmp_oid):
oid = snmp_oid[key] + '.' + str(index)
if oid in item:
if item_key is None:
item_key = item[oid]
else:
item_stats[key] = item[oid]
if item_stats:
ret[item_key] = item_stats
index += 1
else:
# Simple get request
snmpresult = clientsnmp.get_by_oid(itervalues(*snmp_oid))
# Build the internal dict with the SNMP result
for key in iterkeys(snmp_oid):
ret[key] = snmpresult[snmp_oid[key]]
return ret
def get_raw(self):
"""Return the stats object."""
return self.stats
def get_export(self):
"""Return the stats object to export."""
return self.get_raw()
def get_stats(self):
"""Return the stats object in JSON format."""
return json.dumps(self.stats)
def get_stats_item(self, item):
"""Return the stats object for a specific item in JSON format.
Stats should be a list of dict (processlist, network...)
"""
if isinstance(self.stats, dict):
try:
return json.dumps({item: self.stats[item]})
except KeyError as e:
logger.error("Cannot get item {0} ({1})".format(item, e))
return None
elif isinstance(self.stats, list):
try:
# Source:
# http://stackoverflow.com/questions/4573875/python-get-index-of-dictionary-item-in-list
return json.dumps({item: map(itemgetter(item), self.stats)})
except (KeyError, ValueError) as e:
logger.error("Cannot get item {0} ({1})".format(item, e))
return None
else:
return None
def get_stats_value(self, item, value):
"""Return the stats object for a specific item=value in JSON format.
Stats should be a list of dict (processlist, network...)
"""
if not isinstance(self.stats, list):
return None
else:
if value.isdigit():
value = int(value)
try:
return json.dumps(
{value: [i for i in self.stats if i[item] == value]})
except (KeyError, ValueError) as e:
logger.error("Cannot get item({0})=value({1}) ({2})".format(
item, value, e))
return None
def update_views(self):
"""Default builder fo the stats views.
The V of MVC
A dict of dict with the needed information to display the stats.
Example for the stat xxx:
'xxx': {'decoration': 'DEFAULT',
'optional': False,
'additional': False,
'splittable': False}
"""
ret = {}
if (isinstance(self.get_raw(), list) and self.get_raw() is not None
and self.get_key() is not None):
# Stats are stored in a list of dict (ex: NETWORK, FS...)
for i in self.get_raw():
ret[i[self.get_key()]] = {}
for key in listkeys(i):
value = {
'decoration': 'DEFAULT',
'optional': False,
'additional': False,
'splittable': False
}
ret[i[self.get_key()]][key] = value
elif isinstance(self.get_raw(), dict) and self.get_raw() is not None:
# Stats are stored in a dict (ex: CPU, LOAD...)
for key in listkeys(self.get_raw()):
value = {
'decoration': 'DEFAULT',
'optional': False,
'additional': False,
'splittable': False
}
ret[key] = value
self.views = ret
return self.views
def set_views(self, input_views):
"""Set the views to input_views."""
self.views = input_views
def get_views(self, item=None, key=None, option=None):
"""Return the views object.
If key is None, return all the view for the current plugin
else if option is None return the view for the specific key (all option)
else return the view fo the specific key/option
Specify item if the stats are stored in a dict of dict (ex: NETWORK, FS...)
"""
if item is None:
item_views = self.views
else:
item_views = self.views[item]
if key is None:
return item_views
else:
if option is None:
return item_views[key]
else:
return item_views[key][option]
def load_limits(self, config):
"""Load limits from the configuration file, if it exists."""
if (hasattr(config, 'has_section')
and config.has_section(self.plugin_name)):
for level, _ in config.items(self.plugin_name):
# Read limits
limit = '_'.join([self.plugin_name, level])
try:
self._limits[limit] = config.get_float_value(
self.plugin_name, level)
except ValueError:
self._limits[limit] = config.get_value(
self.plugin_name, level).split(",")
logger.debug("Load limit: {0} = {1}".format(
limit, self._limits[limit]))
@property
def limits(self):
"""Return the limits object."""
return self._limits
@limits.setter
def limits(self, input_limits):
"""Set the limits to input_limits."""
self._limits = input_limits
def get_alert(self,
current=0,
minimum=0,
maximum=100,
header="",
log=False):
"""Return the alert status relative to a current value.
Use this function for minor stats.
If current < CAREFUL of max then alert = OK
If current > CAREFUL of max then alert = CAREFUL
If current > WARNING of max then alert = WARNING
If current > CRITICAL of max then alert = CRITICAL
If defined 'header' is added between the plugin name and the status.
Only useful for stats with several alert status.
If log=True than add log if necessary
elif log=False than do not log
elig log=None than apply the config given in the conf file
"""
# Compute the %
try:
value = (current * 100) / maximum
except ZeroDivisionError:
return 'DEFAULT'
except TypeError:
return 'DEFAULT'
# Build the stat_name = plugin_name + header
if header == "":
stat_name = self.plugin_name
else:
stat_name = self.plugin_name + '_' + header
# Manage limits
ret = 'OK'
try:
if value > self.__get_limit('critical', stat_name=stat_name):
ret = 'CRITICAL'
elif value > self.__get_limit('warning', stat_name=stat_name):
ret = 'WARNING'
elif value > self.__get_limit('careful', stat_name=stat_name):
ret = 'CAREFUL'
elif current < minimum:
ret = 'CAREFUL'
except KeyError:
return 'DEFAULT'
# Manage log
log_str = ""
if self.__get_limit_log(stat_name=stat_name, default_action=log):
# Add _LOG to the return string
# So stats will be highlited with a specific color
log_str = "_LOG"
# Add the log to the list
glances_logs.add(ret, stat_name.upper(), value, [])
# Manage action
# Here is a command line for the current trigger ?
try:
command = self.__get_limit_action(ret.lower(), stat_name=stat_name)
except KeyError:
# Reset the trigger
self.actions.set(stat_name, ret.lower())
else:
# A command line is available for the current alert, run it
# Build the {{mustache}} dictionnary
if isinstance(self.stats, list):
# If the stats are stored in a list of dict (fs plugin for exemple)
# Return the dict for the current header
mustache_dict = {}
for item in self.stats:
if item[self.get_key()] == header:
mustache_dict = item
break
else:
# Use the stats dict
mustache_dict = self.stats
# Run the action
self.actions.run(stat_name,
ret.lower(),
command,
mustache_dict=mustache_dict)
# Default is ok
return ret + log_str
def get_alert_log(self, current=0, minimum=0, maximum=100, header=""):
"""Get the alert log."""
return self.get_alert(current, minimum, maximum, header, log=True)
def __get_limit(self, criticity, stat_name=""):
"""Return the limit value for the alert."""
# Get the limit for stat + header
# Exemple: network_wlan0_rx_careful
try:
limit = self._limits[stat_name + '_' + criticity]
except KeyError:
# Try fallback to plugin default limit
# Exemple: network_careful
limit = self._limits[self.plugin_name + '_' + criticity]
# Return the limit
return limit
def __get_limit_action(self, criticity, stat_name=""):
"""Return the action for the alert."""
# Get the action for stat + header
# Exemple: network_wlan0_rx_careful_action
try:
ret = self._limits[stat_name + '_' + criticity + '_action']
except KeyError:
# Try fallback to plugin default limit
# Exemple: network_careful_action
ret = self._limits[self.plugin_name + '_' + criticity + '_action']
# Return the action list
return ret
def __get_limit_log(self, stat_name, default_action=False):
"""Return the log tag for the alert."""
# Get the log tag for stat + header
# Exemple: network_wlan0_rx_log
try:
log_tag = self._limits[stat_name + '_log']
except KeyError:
# Try fallback to plugin default log
# Exemple: network_log
try:
log_tag = self._limits[self.plugin_name + '_log']
except KeyError:
# By defaukt, log are disabled
return default_action
# Return the action list
return log_tag[0].lower() == 'true'
def get_conf_value(self, value, header="", plugin_name=None):
"""Return the configuration (header_) value for the current plugin.
...or the one given by the plugin_name var.
"""
if plugin_name is None:
# If not default use the current plugin name
plugin_name = self.plugin_name
if header != "":
# Add the header
plugin_name = plugin_name + '_' + header
try:
return self._limits[plugin_name + '_' + value]
except KeyError:
return []
def is_hide(self, value, header=""):
"""
Return True if the value is in the hide configuration list.
The hide configuration list is defined in the glances.conf file.
It is a comma separed list of regexp.
Example for diskio:
hide=sda2,sda5,loop.*
"""
# TODO: possible optimisation: create a re.compile list
return not all(j is None for j in [
re.match(i, value)
for i in self.get_conf_value('hide', header=header)
])
def has_alias(self, header):
"""Return the alias name for the relative header or None if nonexist."""
try:
return self._limits[self.plugin_name + '_' + header + '_' +
'alias'][0]
except (KeyError, IndexError):
return None
def msg_curse(self, args=None, max_width=None):
"""Return default string to display in the curse interface."""
return [self.curse_add_line(str(self.stats))]
def get_stats_display(self, args=None, max_width=None):
"""Return a dict with all the information needed to display the stat.
key | description
----------------------------
display | Display the stat (True or False)
msgdict | Message to display (list of dict [{ 'msg': msg, 'decoration': decoration } ... ])
align | Message position
"""
display_curse = False
if hasattr(self, 'display_curse'):
display_curse = self.display_curse
if hasattr(self, 'align'):
align_curse = self._align
if max_width is not None:
ret = {
'display': display_curse,
'msgdict': self.msg_curse(args, max_width=max_width),
'align': align_curse
}
else:
ret = {
'display': display_curse,
'msgdict': self.msg_curse(args),
'align': align_curse
}
return ret
def curse_add_line(self,
msg,
decoration="DEFAULT",
optional=False,
additional=False,
splittable=False):
"""Return a dict with.
Where:
msg: string
decoration:
DEFAULT: no decoration
UNDERLINE: underline
BOLD: bold
TITLE: for stat title
PROCESS: for process name
STATUS: for process status
NICE: for process niceness
CPU_TIME: for process cpu time
OK: Value is OK and non logged
OK_LOG: Value is OK and logged
CAREFUL: Value is CAREFUL and non logged
CAREFUL_LOG: Value is CAREFUL and logged
WARNING: Value is WARINING and non logged
WARNING_LOG: Value is WARINING and logged
CRITICAL: Value is CRITICAL and non logged
CRITICAL_LOG: Value is CRITICAL and logged
optional: True if the stat is optional (display only if space is available)
additional: True if the stat is additional (display only if space is available after optional)
spittable: Line can be splitted to fit on the screen (default is not)
"""
return {
'msg': msg,
'decoration': decoration,
'optional': optional,
'additional': additional,
'splittable': splittable
}
def curse_new_line(self):
"""Go to a new line."""
return self.curse_add_line('\n')
@property
def align(self):
"""Get the curse align."""
return self._align
@align.setter
def align(self, value):
"""Set the curse align.
value: left, right, bottom.
"""
self._align = value
def auto_unit(self, number, low_precision=False):
"""Make a nice human-readable string out of number.
Number of decimal places increases as quantity approaches 1.
examples:
CASE: 613421788 RESULT: 585M low_precision: 585M
CASE: 5307033647 RESULT: 4.94G low_precision: 4.9G
CASE: 44968414685 RESULT: 41.9G low_precision: 41.9G
CASE: 838471403472 RESULT: 781G low_precision: 781G
CASE: 9683209690677 RESULT: 8.81T low_precision: 8.8T
CASE: 1073741824 RESULT: 1024M low_precision: 1024M
CASE: 1181116006 RESULT: 1.10G low_precision: 1.1G
'low_precision=True' returns less decimal places potentially
sacrificing precision for more readability.
"""
symbols = ('K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y')
prefix = {
'Y': 1208925819614629174706176,
'Z': 1180591620717411303424,
'E': 1152921504606846976,
'P': 1125899906842624,
'T': 1099511627776,
'G': 1073741824,
'M': 1048576,
'K': 1024
}
for symbol in reversed(symbols):
value = float(number) / prefix[symbol]
if value > 1:
decimal_precision = 0
if value < 10:
decimal_precision = 2
elif value < 100:
decimal_precision = 1
if low_precision:
if symbol in 'MK':
decimal_precision = 0
else:
decimal_precision = min(1, decimal_precision)
elif symbol in 'K':
decimal_precision = 0
return '{0:.{decimal}f}{symbol}'.format(
value, decimal=decimal_precision, symbol=symbol)
return '{0!s}'.format(number)
def _log_result_decorator(fct):
"""Log (DEBUG) the result of the function fct."""
def wrapper(*args, **kw):
ret = fct(*args, **kw)
logger.debug("%s %s %s return %s" %
(args[0].__class__.__name__,
args[0].__class__.__module__[len('glances_'):],
fct.__name__, ret))
return ret
return wrapper
# Mandatory to call the decorator in childs' classes
_log_result_decorator = staticmethod(_log_result_decorator)