galera-cluster charm will not install for bundle file with override for source

[Larry Michel]

We are running into limitation for deploying the galera-cluster using an OpenStack bundle file that have source overrides. The source overrides are needed for making sure all the charms point to the right cloud archive. For example,

overrides:
    openstack-origin: cloud:trusty-juno
    source: cloud:trusty-updates/juno

The galera-cluster charm is checking source and is only setting the repo to whatever source is set to. However, cloud:trusty-updates/juno does not have the galera bits and so the charm will fail to install:

2015-08-25 13:45:11 INFO install Reading package lists...
2015-08-25 13:45:11 INFO install Building dependency tree...
2015-08-25 13:45:11 INFO install Reading state information...
2015-08-25 13:45:11 INFO install E: Unable to locate package mysql-wsrep-server-5.6
2015-08-25 13:45:11 INFO install E: Couldn't find any package by regex 'mysql-wsrep-server-5.6'
2015-08-25 13:45:11 INFO install E: Unable to locate package mysql-wsrep-client-5.6
2015-08-25 13:45:11 INFO install E: Couldn't find any package by regex 'mysql-wsrep-client-5.6'
2015-08-25 13:45:11 INFO install E: Unable to locate package galera-3
2015-08-25 13:45:11 INFO worker.uniter.jujuc server.go:158 running hook tool "juju-log" ["Couldn't acquire DPKG lock. Will retry in 10 seconds."]
2015-08-25 13:45:11 DEBUG worker.uniter.jujuc server.go:159 hook context id "galera-cluster/0-install-6618307529263305669"; dir "/var/lib/juju/agents/unit-galera-cluster-0/charm"
2015-08-25 13:45:11 INFO juju-log Couldn't acquire DPKG lock. Will retry in 10 seconds.
2015-08-25 13:45:21 INFO install Reading package lists...
2015-08-25 13:45:22 INFO install Building dependency tree...
2015-08-25 13:45:22 INFO install Reading state information...
2015-08-25 13:45:22 INFO install E: Unable to locate package mysql-wsrep-server-5.6
2015-08-25 13:45:22 INFO install E: Couldn't find any package by regex 'mysql-wsrep-server-5.6'
2015-08-25 13:45:22 INFO install E: Unable to locate package mysql-wsrep-client-5.6
2015-08-25 13:45:22 INFO install E: Couldn't find any package by regex 'mysql-wsrep-client-5.6'
2015-08-25 13:45:22 INFO install E: Unable to locate package galera-3
2015-08-25 13:45:22 INFO worker.uniter.jujuc server.go:158 running hook tool "juju-log" ["Couldn't acquire DPKG lock. Will retry in 10 seconds."]
2015-08-25 13:45:22 DEBUG worker.uniter.jujuc server.go:159 hook context id "galera-cluster/0-install-6618307529263305669"; dir "/var/lib/juju/agents/unit-galera-cluster-0/charm"
2015-08-25 13:45:22 INFO juju-log Couldn't acquire DPKG lock. Will retry in 10 seconds.
2015-08-25 13:45:32 INFO install Reading package lists...
2015-08-25 13:45:32 INFO install Building dependency tree...
2015-08-25 13:45:32 INFO install Reading state information...
2015-08-25 13:45:32 INFO install E: Unable to locate package mysql-wsrep-server-5.6
2015-08-25 13:45:32 INFO install E: Couldn't find any package by regex 'mysql-wsrep-server-5.6'
2015-08-25 13:45:32 INFO install E: Unable to locate package mysql-wsrep-client-5.6
2015-08-25 13:45:32 INFO install E: Couldn't find any package by regex 'mysql-wsrep-client-5.6'
2015-08-25 13:45:32 INFO install E: Unable to locate package galera-3
2015-08-25 13:45:32 INFO worker.uniter.jujuc server.go:158 running hook tool "juju-log" ["Couldn't acquire DPKG lock. Will retry in 10 seconds."]
2015-08-25 13:45:32 DEBUG worker.uniter.jujuc server.go:159 hook context id "galera-cluster/0-install-6618307529263305669"; dir "/var/lib/juju/agents/unit-galera-cluster-0/charm"
2015-08-25 13:45:32 INFO juju-log Couldn't acquire DPKG lock. Will retry in 10 seconds.
2015-08-25 13:45:36 DEBUG juju.worker.leadership tracker.go:138 galera-cluster/0 renewing lease for galera-cluster leadership
2015-08-25 13:45:36 DEBUG juju.worker.leadership tracker.go:165 checking galera-cluster/0 for galera-cluster leadership
2015-08-25 13:45:36 DEBUG juju.worker.leadership tracker.go:180 galera-cluster/0 confirmed for galera-cluster leadership until 2015-08-25 13:46:36.103860179 +0000 UTC
2015-08-25 13:45:36 INFO juju.worker.leadership tracker.go:182 galera-cluster/0 will renew galera-cluster leadership at 2015-08-25 13:46:06.103860179 +0000 UTC
2015-08-25 13:45:42 INFO install Reading package lists...
2015-08-25 13:45:42 INFO install Building dependency tree...
2015-08-25 13:45:42 INFO install Reading state information...
2015-08-25 13:45:42 INFO install E: Unable to locate package mysql-wsrep-server-5.6
2015-08-25 13:45:42 INFO install E: Couldn't find any package by regex 'mysql-wsrep-server-5.6'
2015-08-25 13:45:42 INFO install E: Unable to locate package mysql-wsrep-client-5.6
2015-08-25 13:45:42 INFO install E: Couldn't find any package by regex 'mysql-wsrep-client-5.6'
2015-08-25 13:45:42 INFO install E: Unable to locate package galera-3
2015-08-25 13:45:42 INFO install Traceback (most recent call last):
2015-08-25 13:45:42 INFO install File "/var/lib/juju/agents/unit-galera-cluster-0/charm/hooks/install", line 441, in <module>
2015-08-25 13:45:42 INFO install main()
2015-08-25 13:45:42 INFO install File "/var/lib/juju/agents/unit-galera-cluster-0/charm/hooks/install", line 435, in main
2015-08-25 13:45:42 INFO install hooks.execute(sys.argv)
2015-08-25 13:45:42 INFO install File "/var/lib/juju/agents/unit-galera-cluster-0/charm/hooks/charmhelpers/core/hookenv.py", line 544, in execute
2015-08-25 13:45:42 INFO install self._hooks[hook_name]()
2015-08-25 13:45:42 INFO install File "/var/lib/juju/agents/unit-galera-cluster-0/charm/hooks/install", line 94, in install
2015-08-25 13:45:42 INFO install apt_install(PACKAGES, fatal=True)
2015-08-25 13:45:42 INFO install File "/var/lib/juju/agents/unit-galera-cluster-0/charm/hooks/charmhelpers/fetch/__init__.py", line 183, in apt_install
2015-08-25 13:45:42 INFO install _run_apt_command(cmd, fatal)
2015-08-25 13:45:42 INFO install File "/var/lib/juju/agents/unit-galera-cluster-0/charm/hooks/charmhelpers/fetch/__init__.py", line 428, in _run_apt_command
2015-08-25 13:45:42 INFO install result = subprocess.check_call(cmd, env=env)
2015-08-25 13:45:42 INFO install File "/usr/lib/python2.7/subprocess.py", line 540, in check_call
2015-08-25 13:45:42 INFO install raise CalledProcessError(retcode, cmd)
2015-08-25 13:45:42 INFO install subprocess.CalledProcessError: Command '['apt-get', '--assume-yes', '--option=Dpkg::Options::=--force-confold', 'install', 'mysql-wsrep-server-5.6', 'mysql-wsrep-client-5.6', 'galera-3']' returned non-zero exit status 100
2015-08-25 13:45:43 INFO juju.worker.uniter.context context.go:543 handling reboot
2015-08-25 13:45:43 ERROR juju.worker.uniter.operation runhook.go:103 hook "install" failed: exit status 1
2015-08-25 13:45:43 DEBUG juju.worker.uniter modes.go:31 [AGENT-STATUS] failed: run install hook
2015-08-25 13:45:43 INFO juju.worker.uniter modes.go:543 ModeContinue exiting
2015-08-25 13:45:43 INFO juju.worker.uniter modes.go:541 ModeHookError starting

The galera-cluster charm needs to have an option that does not conflict source so the galera package location can be passed in.

[Larry Michel (lmic)]

I tested a branch lp:~lmic/charms/trusty/galera-cluster/galera-cluster+source-galera-config-option where I added source-galera config option so that a galera specific repository can always be set regardless of source, and it worked. The old behavior with source remains the same.

  galera-cluster:
    charm: local:trusty/galera-cluster-45
    exposed: false
    relations:
      cluster:
      - galera-cluster
      shared-db:
      - cinder
      - glance
      - heat
      - keystone
      - neutron-api
      - neutron-gateway
      - nova-cloud-controller
    service-status:
      current: unknown
      since: 10 Sep 2015 16:32:21Z
    units:
      galera-cluster/0:
        agent-state: started
        agent-status:
          current: idle
          since: 10 Sep 2015 16:48:33Z
          version: 1.24.5
        agent-version: 1.24.5
        machine: '4'
        open-ports:
        - 3306/tcp
        public-address: flaglervm05.oilstaging
        workload-status:
          current: unknown
          since: 10 Sep 2015 16:32:21Z