[gnuoy,r=james-page] Add support for nrpe
This commit is contained in:
Liam Young
commit
85c1946e73
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@ -11,3 +11,4 @@ include:
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- contrib.network.ip
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- contrib.peerstorage
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- contrib.python.packages
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- contrib.charmsupport
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11
config.yaml
11
config.yaml
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@ -292,3 +292,14 @@ options:
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order for this charm to function correctly, the privacy extension must be
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disabled and a non-temporary address must be configured/available on
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your network interface.
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nagios_context:
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default: "juju"
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type: string
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description: |
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Used by the nrpe-external-master subordinate charm.
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A string that will be prepended to instance name to set the host name
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in nagios. So for instance the hostname would be something like:
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juju-myservice-0
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If you're running multiple environments with the same services in them
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this allows you to differentiate between them.
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@ -0,0 +1,308 @@
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"""Compatibility with the nrpe-external-master charm"""
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# Copyright 2012 Canonical Ltd.
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#
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# Authors:
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# Matthew Wedgwood <matthew.wedgwood@canonical.com>
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import subprocess
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import pwd
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import grp
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import os
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import re
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import shlex
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import yaml
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from charmhelpers.core.hookenv import (
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config,
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local_unit,
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log,
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relation_ids,
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relation_set,
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relations_of_type,
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)
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from charmhelpers.core.host import service
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# This module adds compatibility with the nrpe-external-master and plain nrpe
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# subordinate charms. To use it in your charm:
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#
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# 1. Update metadata.yaml
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#
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# provides:
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# (...)
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# nrpe-external-master:
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# interface: nrpe-external-master
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# scope: container
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#
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# and/or
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#
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# provides:
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# (...)
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# local-monitors:
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# interface: local-monitors
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# scope: container
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#
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# 2. Add the following to config.yaml
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#
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# nagios_context:
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# default: "juju"
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# type: string
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# description: |
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# Used by the nrpe subordinate charms.
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# A string that will be prepended to instance name to set the host name
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# in nagios. So for instance the hostname would be something like:
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# juju-myservice-0
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# If you're running multiple environments with the same services in them
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# this allows you to differentiate between them.
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# nagios_servicegroups:
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# default: ""
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# type: string
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# description: |
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# A comma-separated list of nagios servicegroups.
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# If left empty, the nagios_context will be used as the servicegroup
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#
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# 3. Add custom checks (Nagios plugins) to files/nrpe-external-master
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#
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# 4. Update your hooks.py with something like this:
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#
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# from charmsupport.nrpe import NRPE
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# (...)
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# def update_nrpe_config():
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# nrpe_compat = NRPE()
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# nrpe_compat.add_check(
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# shortname = "myservice",
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# description = "Check MyService",
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# check_cmd = "check_http -w 2 -c 10 http://localhost"
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# )
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# nrpe_compat.add_check(
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# "myservice_other",
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# "Check for widget failures",
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# check_cmd = "/srv/myapp/scripts/widget_check"
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# )
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# nrpe_compat.write()
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#
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# def config_changed():
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# (...)
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# update_nrpe_config()
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#
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# def nrpe_external_master_relation_changed():
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# update_nrpe_config()
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#
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# def local_monitors_relation_changed():
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# update_nrpe_config()
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#
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# 5. ln -s hooks.py nrpe-external-master-relation-changed
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# ln -s hooks.py local-monitors-relation-changed
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class CheckException(Exception):
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pass
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class Check(object):
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shortname_re = '[A-Za-z0-9-_]+$'
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service_template = ("""
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#---------------------------------------------------
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# This file is Juju managed
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#---------------------------------------------------
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define service {{
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use active-service
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host_name {nagios_hostname}
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service_description {nagios_hostname}[{shortname}] """
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"""{description}
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check_command check_nrpe!{command}
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servicegroups {nagios_servicegroup}
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}}
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""")
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def __init__(self, shortname, description, check_cmd):
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super(Check, self).__init__()
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# XXX: could be better to calculate this from the service name
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if not re.match(self.shortname_re, shortname):
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raise CheckException("shortname must match {}".format(
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Check.shortname_re))
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self.shortname = shortname
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self.command = "check_{}".format(shortname)
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# Note: a set of invalid characters is defined by the
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# Nagios server config
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# The default is: illegal_object_name_chars=`~!$%^&*"|'<>?,()=
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self.description = description
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self.check_cmd = self._locate_cmd(check_cmd)
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def _locate_cmd(self, check_cmd):
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search_path = (
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'/usr/lib/nagios/plugins',
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'/usr/local/lib/nagios/plugins',
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)
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parts = shlex.split(check_cmd)
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for path in search_path:
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if os.path.exists(os.path.join(path, parts[0])):
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command = os.path.join(path, parts[0])
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if len(parts) > 1:
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command += " " + " ".join(parts[1:])
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return command
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log('Check command not found: {}'.format(parts[0]))
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return ''
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def write(self, nagios_context, hostname, nagios_servicegroups=None):
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nrpe_check_file = '/etc/nagios/nrpe.d/{}.cfg'.format(
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self.command)
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with open(nrpe_check_file, 'w') as nrpe_check_config:
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nrpe_check_config.write("# check {}\n".format(self.shortname))
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nrpe_check_config.write("command[{}]={}\n".format(
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self.command, self.check_cmd))
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if not os.path.exists(NRPE.nagios_exportdir):
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log('Not writing service config as {} is not accessible'.format(
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NRPE.nagios_exportdir))
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else:
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self.write_service_config(nagios_context, hostname,
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nagios_servicegroups)
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def write_service_config(self, nagios_context, hostname,
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nagios_servicegroups=None):
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for f in os.listdir(NRPE.nagios_exportdir):
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if re.search('.*{}.cfg'.format(self.command), f):
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os.remove(os.path.join(NRPE.nagios_exportdir, f))
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if not nagios_servicegroups:
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nagios_servicegroups = nagios_context
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templ_vars = {
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'nagios_hostname': hostname,
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'nagios_servicegroup': nagios_servicegroups,
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'description': self.description,
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'shortname': self.shortname,
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'command': self.command,
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}
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nrpe_service_text = Check.service_template.format(**templ_vars)
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nrpe_service_file = '{}/service__{}_{}.cfg'.format(
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NRPE.nagios_exportdir, hostname, self.command)
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with open(nrpe_service_file, 'w') as nrpe_service_config:
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nrpe_service_config.write(str(nrpe_service_text))
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def run(self):
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subprocess.call(self.check_cmd)
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class NRPE(object):
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nagios_logdir = '/var/log/nagios'
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nagios_exportdir = '/var/lib/nagios/export'
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nrpe_confdir = '/etc/nagios/nrpe.d'
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def __init__(self, hostname=None):
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super(NRPE, self).__init__()
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self.config = config()
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self.nagios_context = self.config['nagios_context']
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if 'nagios_servicegroups' in self.config:
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self.nagios_servicegroups = self.config['nagios_servicegroups']
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else:
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self.nagios_servicegroups = 'juju'
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self.unit_name = local_unit().replace('/', '-')
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if hostname:
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self.hostname = hostname
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else:
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self.hostname = "{}-{}".format(self.nagios_context, self.unit_name)
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self.checks = []
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def add_check(self, *args, **kwargs):
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self.checks.append(Check(*args, **kwargs))
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def write(self):
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try:
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nagios_uid = pwd.getpwnam('nagios').pw_uid
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nagios_gid = grp.getgrnam('nagios').gr_gid
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except:
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log("Nagios user not set up, nrpe checks not updated")
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return
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if not os.path.exists(NRPE.nagios_logdir):
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os.mkdir(NRPE.nagios_logdir)
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os.chown(NRPE.nagios_logdir, nagios_uid, nagios_gid)
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nrpe_monitors = {}
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monitors = {"monitors": {"remote": {"nrpe": nrpe_monitors}}}
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for nrpecheck in self.checks:
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nrpecheck.write(self.nagios_context, self.hostname,
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self.nagios_servicegroups)
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nrpe_monitors[nrpecheck.shortname] = {
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"command": nrpecheck.command,
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}
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service('restart', 'nagios-nrpe-server')
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for rid in relation_ids("local-monitors"):
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relation_set(relation_id=rid, monitors=yaml.dump(monitors))
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def get_nagios_hostcontext(relation_name='nrpe-external-master'):
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"""
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Query relation with nrpe subordinate, return the nagios_host_context
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:param str relation_name: Name of relation nrpe sub joined to
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"""
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for rel in relations_of_type(relation_name):
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if 'nagios_hostname' in rel:
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return rel['nagios_host_context']
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def get_nagios_hostname(relation_name='nrpe-external-master'):
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"""
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Query relation with nrpe subordinate, return the nagios_hostname
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:param str relation_name: Name of relation nrpe sub joined to
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"""
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for rel in relations_of_type(relation_name):
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if 'nagios_hostname' in rel:
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return rel['nagios_hostname']
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def get_nagios_unit_name(relation_name='nrpe-external-master'):
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"""
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Return the nagios unit name prepended with host_context if needed
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:param str relation_name: Name of relation nrpe sub joined to
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"""
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host_context = get_nagios_hostcontext(relation_name)
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if host_context:
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unit = "%s:%s" % (host_context, local_unit())
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else:
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unit = local_unit()
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return unit
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def add_init_service_checks(nrpe, services, unit_name):
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"""
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Add checks for each service in list
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:param NRPE nrpe: NRPE object to add check to
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:param list services: List of services to check
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:param str unit_name: Unit name to use in check description
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"""
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for svc in services:
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upstart_init = '/etc/init/%s.conf' % svc
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sysv_init = '/etc/init.d/%s' % svc
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if os.path.exists(upstart_init):
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nrpe.add_check(
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shortname=svc,
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description='process check {%s}' % unit_name,
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check_cmd='check_upstart_job %s' % svc
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)
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elif os.path.exists(sysv_init):
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cronpath = '/etc/cron.d/nagios-service-check-%s' % svc
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cron_file = ('*/5 * * * * root '
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'/usr/local/lib/nagios/plugins/check_exit_status.pl '
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'-s /etc/init.d/%s status > '
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'/var/lib/nagios/service-check-%s.txt\n' % (svc,
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svc)
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)
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f = open(cronpath, 'w')
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f.write(cron_file)
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f.close()
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nrpe.add_check(
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shortname=svc,
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description='process check {%s}' % unit_name,
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check_cmd='check_status_file.py -f '
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'/var/lib/nagios/service-check-%s.txt' % svc,
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)
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@ -0,0 +1,159 @@
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'''
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Functions for managing volumes in juju units. One volume is supported per unit.
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Subordinates may have their own storage, provided it is on its own partition.
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Configuration stanzas::
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volume-ephemeral:
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type: boolean
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default: true
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description: >
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If false, a volume is mounted as sepecified in "volume-map"
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If true, ephemeral storage will be used, meaning that log data
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will only exist as long as the machine. YOU HAVE BEEN WARNED.
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volume-map:
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type: string
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default: {}
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description: >
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YAML map of units to device names, e.g:
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"{ rsyslog/0: /dev/vdb, rsyslog/1: /dev/vdb }"
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Service units will raise a configure-error if volume-ephemeral
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is 'true' and no volume-map value is set. Use 'juju set' to set a
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value and 'juju resolved' to complete configuration.
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Usage::
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from charmsupport.volumes import configure_volume, VolumeConfigurationError
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from charmsupport.hookenv import log, ERROR
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def post_mount_hook():
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stop_service('myservice')
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def post_mount_hook():
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start_service('myservice')
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if __name__ == '__main__':
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try:
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configure_volume(before_change=pre_mount_hook,
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after_change=post_mount_hook)
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except VolumeConfigurationError:
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log('Storage could not be configured', ERROR)
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'''
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# XXX: Known limitations
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# - fstab is neither consulted nor updated
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import os
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from charmhelpers.core import hookenv
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from charmhelpers.core import host
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import yaml
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MOUNT_BASE = '/srv/juju/volumes'
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class VolumeConfigurationError(Exception):
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'''Volume configuration data is missing or invalid'''
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pass
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def get_config():
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'''Gather and sanity-check volume configuration data'''
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volume_config = {}
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config = hookenv.config()
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errors = False
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if config.get('volume-ephemeral') in (True, 'True', 'true', 'Yes', 'yes'):
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volume_config['ephemeral'] = True
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else:
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volume_config['ephemeral'] = False
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try:
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volume_map = yaml.safe_load(config.get('volume-map', '{}'))
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except yaml.YAMLError as e:
|
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hookenv.log("Error parsing YAML volume-map: {}".format(e),
|
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hookenv.ERROR)
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errors = True
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if volume_map is None:
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# probably an empty string
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volume_map = {}
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elif not isinstance(volume_map, dict):
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hookenv.log("Volume-map should be a dictionary, not {}".format(
|
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type(volume_map)))
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errors = True
|
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volume_config['device'] = volume_map.get(os.environ['JUJU_UNIT_NAME'])
|
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if volume_config['device'] and volume_config['ephemeral']:
|
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# asked for ephemeral storage but also defined a volume ID
|
||||
hookenv.log('A volume is defined for this unit, but ephemeral '
|
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'storage was requested', hookenv.ERROR)
|
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errors = True
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elif not volume_config['device'] and not volume_config['ephemeral']:
|
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# asked for permanent storage but did not define volume ID
|
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hookenv.log('Ephemeral storage was requested, but there is no volume '
|
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'defined for this unit.', hookenv.ERROR)
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errors = True
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unit_mount_name = hookenv.local_unit().replace('/', '-')
|
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volume_config['mountpoint'] = os.path.join(MOUNT_BASE, unit_mount_name)
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|
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if errors:
|
||||
return None
|
||||
return volume_config
|
||||
|
||||
|
||||
def mount_volume(config):
|
||||
if os.path.exists(config['mountpoint']):
|
||||
if not os.path.isdir(config['mountpoint']):
|
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hookenv.log('Not a directory: {}'.format(config['mountpoint']))
|
||||
raise VolumeConfigurationError()
|
||||
else:
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host.mkdir(config['mountpoint'])
|
||||
if os.path.ismount(config['mountpoint']):
|
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unmount_volume(config)
|
||||
if not host.mount(config['device'], config['mountpoint'], persist=True):
|
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raise VolumeConfigurationError()
|
||||
|
||||
|
||||
def unmount_volume(config):
|
||||
if os.path.ismount(config['mountpoint']):
|
||||
if not host.umount(config['mountpoint'], persist=True):
|
||||
raise VolumeConfigurationError()
|
||||
|
||||
|
||||
def managed_mounts():
|
||||
'''List of all mounted managed volumes'''
|
||||
return filter(lambda mount: mount[0].startswith(MOUNT_BASE), host.mounts())
|
||||
|
||||
|
||||
def configure_volume(before_change=lambda: None, after_change=lambda: None):
|
||||
'''Set up storage (or don't) according to the charm's volume configuration.
|
||||
Returns the mount point or "ephemeral". before_change and after_change
|
||||
are optional functions to be called if the volume configuration changes.
|
||||
'''
|
||||
|
||||
config = get_config()
|
||||
if not config:
|
||||
hookenv.log('Failed to read volume configuration', hookenv.CRITICAL)
|
||||
raise VolumeConfigurationError()
|
||||
|
||||
if config['ephemeral']:
|
||||
if os.path.ismount(config['mountpoint']):
|
||||
before_change()
|
||||
unmount_volume(config)
|
||||
after_change()
|
||||
return 'ephemeral'
|
||||
else:
|
||||
# persistent storage
|
||||
if os.path.ismount(config['mountpoint']):
|
||||
mounts = dict(managed_mounts())
|
||||
if mounts.get(config['mountpoint']) != config['device']:
|
||||
before_change()
|
||||
unmount_volume(config)
|
||||
mount_volume(config)
|
||||
after_change()
|
||||
else:
|
||||
before_change()
|
||||
mount_volume(config)
|
||||
after_change()
|
||||
return config['mountpoint']
|
||||
|
|
@ -53,6 +53,7 @@ UBUNTU_OPENSTACK_RELEASE = OrderedDict([
|
|||
('saucy', 'havana'),
|
||||
('trusty', 'icehouse'),
|
||||
('utopic', 'juno'),
|
||||
('vivid', 'kilo'),
|
||||
])
|
||||
|
||||
|
||||
|
|
@ -64,6 +65,7 @@ OPENSTACK_CODENAMES = OrderedDict([
|
|||
('2013.2', 'havana'),
|
||||
('2014.1', 'icehouse'),
|
||||
('2014.2', 'juno'),
|
||||
('2015.1', 'kilo'),
|
||||
])
|
||||
|
||||
# The ugly duckling
|
||||
|
|
@ -84,6 +86,7 @@ SWIFT_CODENAMES = OrderedDict([
|
|||
('2.0.0', 'juno'),
|
||||
('2.1.0', 'juno'),
|
||||
('2.2.0', 'juno'),
|
||||
('2.2.1', 'kilo'),
|
||||
])
|
||||
|
||||
DEFAULT_LOOPBACK_SIZE = '5G'
|
||||
|
|
@ -289,6 +292,9 @@ def configure_installation_source(rel):
|
|||
'juno': 'trusty-updates/juno',
|
||||
'juno/updates': 'trusty-updates/juno',
|
||||
'juno/proposed': 'trusty-proposed/juno',
|
||||
'kilo': 'trusty-updates/kilo',
|
||||
'kilo/updates': 'trusty-updates/kilo',
|
||||
'kilo/proposed': 'trusty-proposed/kilo',
|
||||
}
|
||||
|
||||
try:
|
||||
|
|
|
|||
|
|
@ -64,9 +64,16 @@ CLOUD_ARCHIVE_POCKETS = {
|
|||
'trusty-juno/updates': 'trusty-updates/juno',
|
||||
'trusty-updates/juno': 'trusty-updates/juno',
|
||||
'juno/proposed': 'trusty-proposed/juno',
|
||||
'juno/proposed': 'trusty-proposed/juno',
|
||||
'trusty-juno/proposed': 'trusty-proposed/juno',
|
||||
'trusty-proposed/juno': 'trusty-proposed/juno',
|
||||
# Kilo
|
||||
'kilo': 'trusty-updates/kilo',
|
||||
'trusty-kilo': 'trusty-updates/kilo',
|
||||
'trusty-kilo/updates': 'trusty-updates/kilo',
|
||||
'trusty-updates/kilo': 'trusty-updates/kilo',
|
||||
'kilo/proposed': 'trusty-proposed/kilo',
|
||||
'trusty-kilo/proposed': 'trusty-proposed/kilo',
|
||||
'trusty-proposed/kilo': 'trusty-proposed/kilo',
|
||||
}
|
||||
|
||||
# The order of this list is very important. Handlers should be listed in from
|
||||
|
|
|
|||
|
|
@ -116,6 +116,8 @@ from charmhelpers.contrib.network.ip import (
|
|||
|
||||
from charmhelpers.contrib.openstack.context import ADDRESS_TYPES
|
||||
|
||||
from charmhelpers.contrib.charmsupport import nrpe
|
||||
|
||||
hooks = Hooks()
|
||||
CONFIGS = register_configs()
|
||||
|
||||
|
|
@ -131,8 +133,9 @@ def install():
|
|||
if os.path.isdir(_files):
|
||||
for f in os.listdir(_files):
|
||||
f = os.path.join(_files, f)
|
||||
log('Installing %s to /usr/bin' % f)
|
||||
shutil.copy2(f, '/usr/bin')
|
||||
if os.path.isfile(f):
|
||||
log('Installing %s to /usr/bin' % f)
|
||||
shutil.copy2(f, '/usr/bin')
|
||||
[open_port(port) for port in determine_ports()]
|
||||
log('Disabling services into db relation joined')
|
||||
disable_services()
|
||||
|
|
@ -166,6 +169,7 @@ def config_changed():
|
|||
for r_id in relation_ids('identity-service'):
|
||||
identity_joined(rid=r_id)
|
||||
[cluster_joined(rid) for rid in relation_ids('cluster')]
|
||||
update_nrpe_config()
|
||||
|
||||
|
||||
@hooks.hook('amqp-relation-joined')
|
||||
|
|
@ -775,6 +779,7 @@ def upgrade_charm():
|
|||
for r_id in relation_ids('cloud-compute'):
|
||||
for unit in related_units(r_id):
|
||||
compute_changed(r_id, unit)
|
||||
update_nrpe_config()
|
||||
|
||||
|
||||
# remote_restart is defaulted to true as nova-cells may have started the
|
||||
|
|
@ -849,6 +854,18 @@ def neutron_api_relation_broken():
|
|||
quantum_joined(rid=rid)
|
||||
|
||||
|
||||
@hooks.hook('nrpe-external-master-relation-joined',
|
||||
'nrpe-external-master-relation-changed')
|
||||
def update_nrpe_config():
|
||||
# python-dbus is used by check_upstart_job
|
||||
apt_install('python-dbus')
|
||||
hostname = nrpe.get_nagios_hostname()
|
||||
current_unit = nrpe.get_nagios_unit_name()
|
||||
nrpe_setup = nrpe.NRPE(hostname=hostname)
|
||||
nrpe.add_init_service_checks(nrpe_setup, services(), current_unit)
|
||||
nrpe_setup.write()
|
||||
|
||||
|
||||
@hooks.hook('memcache-relation-joined',
|
||||
'memcache-relation-departed',
|
||||
'memcache-relation-changed',
|
||||
|
|
|
|||
|
|
@ -0,0 +1 @@
|
|||
nova_cc_hooks.py
|
||||
|
|
@ -0,0 +1 @@
|
|||
nova_cc_hooks.py
|
||||
|
|
@ -7,6 +7,9 @@ description: |
|
|||
categories:
|
||||
- openstack
|
||||
provides:
|
||||
nrpe-external-master:
|
||||
interface: nrpe-external-master
|
||||
scope: container
|
||||
cloud-controller:
|
||||
interface: nova
|
||||
requires:
|
||||
|
|
|
|||
|
|
@ -64,6 +64,7 @@ TO_PATCH = [
|
|||
'migrate_nova_database',
|
||||
'migrate_neutron_database',
|
||||
'uuid',
|
||||
'update_nrpe_config',
|
||||
]
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue