b42fcfc19a
All OpenStack charms are now directly published to the charm store on landing; switch Amulet helper to resolve charms using the charm store rather than bzr branches, removing the lag between charm changes landing and being available for other charms to use for testing. This is also important for new layered charms where the charm must be build and published prior to being consumable. Change-Id: Ie9b1f1a3a52dacdf258863d505e9f3b00b093eec
112 lines
3.6 KiB
Python
112 lines
3.6 KiB
Python
# Copyright 2014-2016 Canonical Limited.
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#
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# This file is part of charm-helpers.
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#
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# charm-helpers is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License version 3 as
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# published by the Free Software Foundation.
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#
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# charm-helpers is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with charm-helpers. If not, see <http://www.gnu.org/licenses/>.
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#
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# Copyright 2016 Canonical Ltd.
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#
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# Authors:
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# Openstack Charmers <
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#
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"""
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Helpers for high availability.
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"""
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import re
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from charmhelpers.core.hookenv import (
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log,
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relation_set,
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charm_name,
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config,
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status_set,
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DEBUG,
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)
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from charmhelpers.contrib.openstack.ip import (
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resolve_address,
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)
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class DNSHAException(Exception):
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"""Raised when an error occurs setting up DNS HA
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"""
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pass
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def update_dns_ha_resource_params(resources, resource_params,
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relation_id=None,
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crm_ocf='ocf:maas:dns'):
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""" Check for os-*-hostname settings and update resource dictionaries for
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the HA relation.
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@param resources: Pointer to dictionary of resources.
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Usually instantiated in ha_joined().
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@param resource_params: Pointer to dictionary of resource parameters.
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Usually instantiated in ha_joined()
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@param relation_id: Relation ID of the ha relation
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@param crm_ocf: Corosync Open Cluster Framework resource agent to use for
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DNS HA
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"""
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settings = ['os-admin-hostname', 'os-internal-hostname',
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'os-public-hostname']
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# Check which DNS settings are set and update dictionaries
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hostname_group = []
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for setting in settings:
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hostname = config(setting)
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if hostname is None:
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log('DNS HA: Hostname setting {} is None. Ignoring.'
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''.format(setting),
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DEBUG)
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continue
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m = re.search('os-(.+?)-hostname', setting)
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if m:
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networkspace = m.group(1)
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else:
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msg = ('Unexpected DNS hostname setting: {}. '
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'Cannot determine network space name'
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''.format(setting))
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status_set('blocked', msg)
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raise DNSHAException(msg)
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hostname_key = 'res_{}_{}_hostname'.format(charm_name(), networkspace)
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if hostname_key in hostname_group:
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log('DNS HA: Resource {}: {} already exists in '
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'hostname group - skipping'.format(hostname_key, hostname),
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DEBUG)
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continue
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hostname_group.append(hostname_key)
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resources[hostname_key] = crm_ocf
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resource_params[hostname_key] = (
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'params fqdn="{}" ip_address="{}" '
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''.format(hostname, resolve_address(endpoint_type=networkspace,
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override=False)))
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if len(hostname_group) >= 1:
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log('DNS HA: Hostname group is set with {} as members. '
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'Informing the ha relation'.format(' '.join(hostname_group)),
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DEBUG)
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relation_set(relation_id=relation_id, groups={
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'grp_{}_hostnames'.format(charm_name()): ' '.join(hostname_group)})
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else:
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msg = 'DNS HA: Hostname group has no members.'
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status_set('blocked', msg)
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raise DNSHAException(msg)
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