The charm currently configures events to be published to
rabbit on both the config.event_topic (event.sample queue)
and alarm topic but as of Queens Ceilometer no longer
consumes event.sample. This patch makes the event_sink
publishers configurable and defaults to publishing to
aodh to retain backwards compatibility.

Change-Id: I5b55f31adcf2b069ff51e387a416f9f1ac4099f8
Partial-Bug: #1676586

This change adds polling.yaml to the list of managed config files, for
Queens and above.  Two new config items are added alongside the
template, to take into account a choice between the two polling.yaml
files supplied with the Ceilometer source, one which has a small list of
pollsters and the other which has all pollsters.  Additionally the
change adds the option to set the polling interval.

Change-Id: Ifff72870cf79bea23dbd21586857dd832c9e1405
Closes-Bug: 1785933
Closes-Bug: 1652848

The configuration file /etc/ceilometer/pipeline.yaml will be managed by
juju, currently it is not. On every change of this file
ceilometer-collector daemon is restarted.

Change-Id: Ie18a5284812f4f698b929b9e17b34289e7732bf7
Closes-Bug: 1715672

There is a use-case to forward events received by ceilometer from
OpenStack services to an external system via http/udp. It comes
from the fact that aodh does not include all information about an
event alarm into POSTed data. Raw event data can be published by
ceilometer via http/udp to an external system without giving a
user direct access to rabbitmq.

This patch adds a context generator, associated templates, and
configuration entry for configuring multiple event-sinks in
/etc/ceilometer/event_pipeline.yaml. This also modifies the
ceilometer.conf templates to reflect the correct naming of the
same file to align with upstream Ceilometer.

Also adds support for a future Panko charm event consumer using
the event-service interface in the above context with associated
metadata and hook symlinks.

This change will only effect Mitaka and later clouds.

Closes Bug: 1763321

Change-Id: I931438c720272bd9a3d2b958ebabcd3584790bd0

Align ceilometer charm with worker-multiplier usage as found
across the majority of OpenStack Charms.  Worker configuration
values are set for API, Notification and Collector services
as needed for each release. Note that for Ocata or later, API
services are executed as WSGI apps under Apache which was
already plugged into the standard worker calculation logic
in charm helpers.

This includes dropping of the existing api-worker configuration
option in preference to a calculated approach.

Change-Id: Idba7c3012d9d24b7ae6ef8eade4a5261ef1cbddc
Closes-Bug: #1745189

The default HAProxy timeout values are fairly strict. On a busy cloud
it is common to exceed one or more of these timeouts. The only
indication that HAProxy has exceeded a timeout and dropped the
connection is errors such as "BadStatusLine" or "EOF." These can be
very difficult to diagnose when intermittent.

This charm-helpers sync pulls in the change to update the default
timeout values to more real world settings. These values have been
extensively tested in ServerStack. Configured values will not be
overridden.

Partial Bug: #1736171

Change-Id: I2474ba8abbd77d89b82d2fefb51aef463c45169b

Add support for use of internal endpoints for inter-service
API calls from ceilometer.

Change-Id: Id702de85fb2236f21773ee7f2fb3698012b5f16c
Closes-Bug: 1713923

Add new metric-service interface to support use of
Gnocchi as a storage backend for resource and metric
data.

Configure ceilometer to use the gnocchi dispatcher
in the event that ceilometer is related to gnocchi.
This has the side effect of disabling the ceilometer
API - Aodh and Gnocchi API's should be used directly
in this deployment topology.

Note that Gnocchi is only supported in OpenStack
Mitaka or later; 'metrics-service' is added to the
required interfaces configuration as an alternative
to 'mongodb' for >= Mitaka.

Change-Id: Ia31dfefd5efa3fb5ec2ba5d132ee865c567bd8df

Change-Id: Iafcf482dd75e808207611cc03fa552a751aa3e9e

This change aligns with the Ocata ceilometer package, which has
moved the ceilometer-api to run under mod_wsgi with apache2.

Change-Id: I0f13f3bcb346182541376843a65d07f570f89442

ceilometer.conf template >= Kilo does not contain metering-time-to-live
and event-time-to-live parameters. Add these options so we can control
ceilometer database growth.

Change-Id: Id5831280daeb582586bfa615268309c4abec5d63
Closes-Bug: 1561220

Implement DNS high availability. Pass the correct information to
hacluster to register a DNS entry with MAAS 2.0 or greater rather
than using a virtual IP.

Charm-helpers sync to bring in DNS HA helpers

Change-Id: I543095a210e668f30c3617990b3ee668a3143dd9

Add charmhelpers.contrib.hardening and calls to install,
config-changed, upgrade-charm and update-status hooks. Also
add new config option to allow one or more hardening
modules to be applied at runtime.

Change-Id: I7752d72cc5a3f47fe66bca23aac730d76af8556a

Partially-Closes-Bug: 1473426

Adds in the config option for overriding public endpoint addresses
and introduces a unit tests to ensure that the override for the
public address is functioning correctly.

Closes-Bug: #1398182

Ceilometer api HA