def check_and_confirm_change(self, diffs):
""" Checks whether there are any changes detected between
running config and config file, and prompts whether
to update the running config or not
"""
if not diffs:
return False
return utils.ask_str("Do you want to update the running"
" config to match the config file? (y/n): ",
yesno=True)
def write_config(config, pyrax):
""" Prompt for missing keys in the config file and writes a new one out """
config.parse_config()
try:
if config.lc_config.validate() and \
config.as_config.validate() and \
config.as_config.id:
utils.print_msg(
"Config defined in %s passes validation."
" Checking for misconfiguration and missing"
" optional keys.." % (config.config_file), bcolors.OKGREEN)
except AttributeError:
pass
##
# Write [autoscale] config
##
if not config.as_config.id:
group = utils.get_object_from_list(pyrax.autoscale,
"group",
create_new_option=True)
if group is not None:
config.set_config_option('autoscale', 'id', group)
if not config.as_config.name:
group_name = utils.ask_str("Name of autoscale_group: ")
config.set_config_option('autoscale', 'name', group_name)
if not isinstance(config.as_config.scale_up, int):
scale_up = utils.ask_integer(
"Number of servers to scale up by when triggered: ")
config.set_config_option('autoscale', 'scale_up', scale_up)
if not isinstance(config.as_config.scale_down, int):
scale_down = utils.ask_integer(
"Number of servers to scale down by when triggered: ")
config.set_config_option('autoscale', 'scale_down', scale_down)
if not isinstance(config.as_config.max_entities, int):
max_entities = utils.ask_integer(
"Max number of servers to scale up to (max_entities): ")
config.set_config_option('autoscale', 'max_entities', max_entities)
if not isinstance(config.as_config.min_entities, int):
max_entities = config.as_config.max_entities
min_entities = utils.ask_integer(
"Never scale down below this number of servers (min_entities): ")
if min_entities > max_entities:
print_msg(
"min_entities must be smaller than or equal"
"to max_entities (%d)" % max_entities, bcolors.FAIL)
min_entities = utils.ask_integer(
"Never scale down below this "
"number of servers"
" (min_entities): ",
allowed_input=xrange(0, max_entities))
config.set_config_option('autoscale', 'min_entities', min_entities)
if not isinstance(config.as_config.cooldown, int):
cooldown = utils.ask_integer(
"Do not process scale event more frequent than"
" this (cooldown, seconds): ")
config.set_config_option('autoscale', 'cooldown', cooldown)
##
# Write [launch-config] config
##
if not config.lc_config.image:
image = utils.get_object_from_list(pyrax.images, "image")
config.set_config_option('launch-configuration', 'image', image)
if not config.lc_config.flavor:
flavor = utils.get_object_from_list(pyrax.cloudservers.flavors,
"flavor")
config.set_config_option('launch-configuration', 'flavor', flavor)
if not config.lc_config.key_name:
key_name = utils.get_object_from_list(pyrax.cloudservers.keypairs,
"ssh-key to add to"
" /root/.ssh/authorized_keys on"
" the servers",
create_new_option=True)
if key_name is None:
key_name = utils.add_new_key(pyrax)
config.set_config_option('launch-configuration', 'key_name', key_name)
if not config.lc_config.name:
name = utils.ask_str("Server name (note that an 11 character suffix"
" will be added to this name): ")
config.set_config_option('launch-configuration', 'name', name)
if config.get('launch-configuration', 'cloud_init') is None:
print("When servers are booted up, the contents of the cloud-init"
" script will be executed on the server. This is a way to"
" install and configure the software the machine needs"
" in order to serve its purpose.\n"
"To use the default - input: templates/cloud-init.yml.j2")
cloud_init = utils.ask_file("Path to cloud-init script: ")
config.set_config_option('launch-configuration', 'cloud_init',
cloud_init)
if not isinstance(config.lc_config.networks, list):
networks = []
utils.print_msg(
"Supply one or more networks you wish to"
"attach the cloud servers to", bcolors.QUESTION)
while True:
network = utils.get_object_from_list(pyrax.cloud_networks,
"network",
quit_option=True)
if network and network not in networks:
networks.append(str(network))
elif network:
pass
else:
break
config.set_config_option('launch-configuration', 'networks', networks)
if not config.get('launch-configuration', 'skip_default_networks'):
print("By default, the launch config will contain the default"
" networks (PublicNet and ServiceNet). You can optionally"
" disable these, but some Rackspace services will not function"
" properly without them, and they are obligatory on Managed"
" service levels")
keep = utils.ask_str("Keep default networks? (y/n): ", yesno=True)
if keep:
config.set_config_option('launch-configuration',
'skip_default_networks', False)
else:
config.set_config_option('launch-configuration',
'skip_default_networks', True)
if not config.get('launch-configuration', 'disk_config'):
disk_config = utils.ask_str(
"Disk config method (AUTO or MANUAL): ",
allowed_input=['AUTO', 'MANUAL', 'auto', 'manual'])
config.set_config_option('launch-configuration', 'disk_config',
disk_config.upper())
##
# Write [rax-autoscaler] config
##
if not isinstance(config.ras_config.load_balancers, list):
load_balancers = []
utils.print_msg(
"Supply one or more load balancers you wish to"
" attach the cloud servers to", bcolors.QUESTION)
while True:
load_balancer = utils.get_object_from_list(
pyrax.cloud_loadbalancers, "load balancer", quit_option=True)
if load_balancer and load_balancer not in load_balancers:
load_balancers.append(load_balancer)
elif load_balancer:
pass
else:
break
config.set_config_option('rax-autoscaler', 'load_balancers',
load_balancers)
if not isinstance(config.ras_config.num_static_servers, int):
num_static_servers = utils.ask_integer(
"How many nodes in the load balancer are"
" not part of the scaling group? (0 for none): ")
config.set_config_option('rax-autoscaler', 'num_static_servers',
num_static_servers)
if not isinstance(config.ras_config.private_key, str) or \
not utils.is_readable(config.ras_config.private_key):
print("When scaled up, the servers need to log in to the admin server"
" in order to download the playbook, or perform other tasks as"
" laid out in the cloud-init template.\nSupply a private key"
" which can be used to log in as the user 'autoscale' on the"
" admin server")
private_key = utils.ask_file("Private key to inject"
" into /root/.ssh/id_rsa on servers: ")
config.set_config_option('rax-autoscaler', 'private_key', private_key)
if not isinstance(config.ras_config.admin_server, str):
admin_server = utils.ask_str("IP or host-name of admin server to"
" download playbook from: ")
config.set_config_option('rax-autoscaler', 'admin_server',
admin_server)
# Re-parse the file on-disk and validate
config.parse_config()
config.validate()
def main():
parser = argparse.ArgumentParser('Set up and manage autoscale groups')
parser.add_argument('--no-create-config', required=False,
action="store_true",
help='Fail rather than prompt for'
' missing config variables')
parser.add_argument('--config-file', type=str,
default='/opt/autoscale/autoscaler.ini',
help='Path to config file (default'
' /opt/autoscale/autoscaler.ini)')
args = parser.parse_args()
""" We need to parse the config file first of all, since we need a pyrax
client for creating and further parsing the config file we require
a minimal config with at least cloud credentials in it
"""
config = utils.config(args.config_file, credentials_only=True)
username, api_key, region = config.get_credentials()
pyrax.set_setting('identity_type', 'rackspace')
pyrax.set_setting('region', region)
pyrax.set_credentials(username, api_key)
if not args.no_create_config:
create_config.write_config(config, pyrax)
# Re-read config if changed and run through validation
config = utils.config(args.config_file)
# Converts CSV user input to structures used by pyrax and names to IDs etc.
utils.config_fixup(config)
while True:
try:
auto_scale = autoscale.autoscale(config, pyrax)
break
except pyrax.exceptions.NotFound:
question = (bcolors.FAIL + "You specified a scaling group"
" with ID %s, which does not appear to exist on"
" this account. Would you "
" like to create it? (y/n): " % (
config.as_config.id) + bcolors.ENDC)
if not utils.ask_str(question, yesno=True):
exit(0)
else:
# If given an empty ID, __init__ in autoscale will create a
# group
config.as_config.id = None
except Exception:
raise
scale_down = auto_scale.get_scale_down_policy()
scale_up = auto_scale.get_scale_up_policy()
config.set_config_option('rax-autoscaler', 'scale_up_webhook',
auto_scale.get_webhook_url(scale_up))
config.set_config_option('rax-autoscaler', 'scale_down_webhook',
auto_scale.get_webhook_url(scale_down))
config.set_config_option('rax-autoscaler', 'scale_up_policy',
auto_scale.get_scale_up_policy().id)
config.set_config_option('rax-autoscaler', 'scale_down_policy',
auto_scale.get_scale_down_policy().id)
config.set_config_option('autoscale', 'id', auto_scale.get_id())
create_config.generate_rax_as_config(config)
