charm-hacluster/hooks/pacemaker-remote-relation-joined
Liam Young e357f2a1b5 Add support for pacemaker-remotes
This change adds support for pacmaker-remots joining the cluster
via the pacemaher-remote relation. The pacemaker-remotes can
advertise whether they should host resources. If the
pacemaker-remotes are only being used for failure detection
(as is the case with masakari host monitors) then they
will not host resources.

Pacemaker remotes are managed in the cluster as resources
which nominally run on a member in the main cluster. The
resource that corresponds to the pacemaker-remote is managed
via configure_pacemaker_remotes and configure_pacemaker_remote
functions.

If the pacemaker-remotes should not run resources then the
cluster needs to be switched to an opt-in cluster. In an
opt-in cluster location rules are needed to explicitly
allow a resource to run on a specific node. This behaviour
is controlled via the global cluster parameter 'symmetric-cluster'
this is set via the new method set_cluster_symmetry. The method
add_location_rules_for_local_nodes is used for creating these
explicit rules.

Change-Id: I0a66cfb1ecad02c2b185c5e6402e77f713d25f8b
2019-04-03 10:50:58 +00:00

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