def get_jmx_status():
"""This function tries to read the 2 jmxfetch status file which are yaml file
located in the temp directory.
There are 2 files:
- One generated by the Agent itself, for jmx checks that can't be initialized because
there are missing stuff.
Its format is as following:
###
invalid_checks:
jmx: !!python/object/apply:jmxfetch.InvalidJMXConfiguration [You need to have at
least one instance defined in the YAML file for this check]
timestamp: 1391040927.136523
###
- One generated by jmxfetch that return information about the collection of metrics
its format is as following:
###
timestamp: 1391037347435
checks:
failed_checks:
jmx:
- {message: Unable to create instance. Please check your yaml file, status: ERROR}
initialized_checks:
tomcat:
- {message: null, status: OK, metric_count: 7, instance_name: jmx-remihakim.fr-3000}
###
"""
check_statuses = []
java_status_path = JMXFiles.get_status_file_path()
python_status_path = JMXFiles.get_python_status_file_path()
if not os.path.exists(java_status_path) and not os.path.exists(python_status_path):
log.debug("There is no jmx_status file at: %s or at: %s" % (java_status_path, python_status_path))
return []
check_data = defaultdict(lambda: defaultdict(list))
try:
if os.path.exists(java_status_path):
java_jmx_stats = yaml.load(file(java_status_path))
status_age = time.time() - java_jmx_stats.get('timestamp')/1000 # JMX timestamp is saved in milliseconds
jmx_checks = java_jmx_stats.get('checks', {})
if status_age > 60:
check_statuses.append(
CheckStatus("jmx", [
InstanceStatus(
0,
STATUS_ERROR,
error="JMXfetch didn't return any metrics during the last minute"
)
])
)
else:
for check_name, instances in jmx_checks.get('failed_checks', {}).iteritems():
for info in instances:
message = info.get('message', None)
metric_count = info.get('metric_count', 0)
service_check_count = info.get('service_check_count', 0)
status = info.get('status')
instance_name = info.get('instance_name', None)
check_data[check_name]['statuses'].append(get_jmx_instance_status(instance_name, status, message, metric_count))
check_data[check_name]['metric_count'].append(metric_count)
check_data[check_name]['service_check_count'].append(service_check_count)
for check_name, instances in jmx_checks.get('initialized_checks', {}).iteritems():
for info in instances:
message = info.get('message', None)
metric_count = info.get('metric_count', 0)
service_check_count = info.get('service_check_count', 0)
status = info.get('status')
instance_name = info.get('instance_name', None)
check_data[check_name]['statuses'].append(get_jmx_instance_status(instance_name, status, message, metric_count))
check_data[check_name]['metric_count'].append(metric_count)
check_data[check_name]['service_check_count'].append(service_check_count)
for check_name, data in check_data.iteritems():
check_status = CheckStatus(check_name, data['statuses'],
metric_count=sum(data['metric_count']),
service_check_count=sum(data['service_check_count']))
check_statuses.append(check_status)
if os.path.exists(python_status_path):
python_jmx_stats = yaml.load(file(python_status_path))
jmx_checks = python_jmx_stats.get('invalid_checks', {})
for check_name, excep in jmx_checks.iteritems():
check_statuses.append(CheckStatus(check_name, [], init_failed_error=excep))
return check_statuses
except Exception:
log.exception("Couldn't load latest jmx status")
return []
def _start(self, path_to_java, java_run_opts, jmx_checks, command, reporter, tools_jar_path):
statsd_port = self.agentConfig.get('dogstatsd_port', "8125")
if reporter is None:
reporter = "statsd:%s" % str(statsd_port)
log.info("Starting jmxfetch:")
try:
path_to_java = path_to_java or "java"
java_run_opts = java_run_opts or ""
path_to_jmxfetch = self._get_path_to_jmxfetch()
path_to_status_file = JMXFiles.get_status_file_path()
if tools_jar_path is None:
classpath = path_to_jmxfetch
else:
classpath = r"%s:%s" % (tools_jar_path, path_to_jmxfetch)
subprocess_args = [
path_to_java, # Path to the java bin
'-classpath',
classpath,
JMXFETCH_MAIN_CLASS,
'--check_period', str(self.check_frequency * 1000), # Period of the main loop of jmxfetch in ms
'--conf_directory', r"%s" % self.confd_path, # Path of the conf.d directory that will be read by jmxfetch,
'--log_level', JAVA_LOGGING_LEVEL.get(self.logging_config.get("log_level"), "INFO"), # Log Level: Mapping from Python log level to log4j log levels
'--log_location', r"%s" % self.logging_config.get('jmxfetch_log_file'), # Path of the log file
'--reporter', reporter, # Reporter to use
'--status_location', r"%s" % path_to_status_file, # Path to the status file to write
command, # Name of the command
]
if Platform.is_windows():
# Signal handlers are not supported on Windows:
# use a file to trigger JMXFetch exit instead
path_to_exit_file = JMXFiles.get_python_exit_file_path()
subprocess_args.insert(len(subprocess_args) - 1, '--exit_file_location')
subprocess_args.insert(len(subprocess_args) - 1, path_to_exit_file)
subprocess_args.insert(4, '--check')
for check in jmx_checks:
subprocess_args.insert(5, check)
# Specify a maximum memory allocation pool for the JVM
if "Xmx" not in java_run_opts and "XX:MaxHeapSize" not in java_run_opts:
java_run_opts += _JVM_DEFAULT_MAX_MEMORY_ALLOCATION
# Specify the initial memory allocation pool for the JVM
if "Xms" not in java_run_opts and "XX:InitialHeapSize" not in java_run_opts:
java_run_opts += _JVM_DEFAULT_INITIAL_MEMORY_ALLOCATION
for opt in java_run_opts.split():
subprocess_args.insert(1, opt)
log.info("Running %s" % " ".join(subprocess_args))
jmx_process = subprocess.Popen(subprocess_args, close_fds=True)
self.jmx_process = jmx_process
# Register SIGINT and SIGTERM signal handlers
self.register_signal_handlers()
# Wait for JMXFetch to return
jmx_process.wait()
return jmx_process.returncode
except OSError:
java_path_msg = "Couldn't launch JMXTerm. Is Java in your PATH ?"
log.exception(java_path_msg)
invalid_checks = {}
for check in jmx_checks:
check_name = check.split('.')[0]
check_name = check_name.encode('ascii', 'ignore')
invalid_checks[check_name] = java_path_msg
JMXFiles.write_status_file(invalid_checks)
raise
except Exception:
log.exception("Couldn't launch JMXFetch")
raise
