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This commit implements composable HA for the pacemaker profiles.
- Everytime a pacemaker resource gets included on a node,
that node will add a node cluster property with the name of the resource
(e.g. galera-role=true)
- Add a location rule constraint to force running the resource only
on the nodes that have that property
- We also make sure that any pacemaker resource/property creation has a
predefined number of tries (20 by default). The reason for this is
that within composable HA, it might be possible to get "older CIB"
errors when another node changed the CIB while we were doing an
operation on it. Simply retrying fixes this.
- Also make sure that we use the newly introduced
pacemaker::constraint::order class instead of the older
pacemaker::constraint::base class. The former uses the push_cib()
function and hence behaves correctly in case multiple nodes try
to modify the CIB at the same time.
Change-Id: I63da4f48da14534fd76265764569e76300534472
Depends-On: Ib931adaff43dbc16220a90fb509845178d696402
Depends-On: I8d78cc1b14f0e18e034b979a826bf3cdb0878bae
Depends-On: Iba1017c33b1cd4d56a3ee8824d851b38cfdbc2d3
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Currently the /var/lib/tripleo/pacemaker-restarts directory is created
only when base/pacemaker.pp file is included in the manifest. There is a
notification that ensures precedence order and trigger the touch.
The trigger and the dependency on the base/pacemaker.pp should not be
required as someone using the tripleo::pacemaker::resource_restart_flag
would expect the file to be created no matter what.
For instance in the Cinder upgrade in the convergence step has this
defined:
Cinder_config<||> ~> Tripleo::Pacemaker::Resource_restart_flag["${::cinder::params::volume_service}"]
but in the convergence step, the base/pacemaker.pp is not included and
the above trigger fails as the directory is not created.
It looks the same for manilla.pp.
This patch removes the trigger and ensures the directory is created when
needed.
Change-Id: Ic3aa82c818662e9e88e21c8381d657adef5b43ac
Closes-Bug: #1632232
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Write restart flag file for services managed by Pacemaker into
/var/lib/tripleo/pacemaker-restarts directory. The name of the file must
match the name of the clone resource defined in pacemaker. The
post-puppet restart script will restart each service having a restart
flag file and remove those files.
This approach focuses on $pacemaker_master only (we don't want to
restart the pacemaker services 3 times when we have 3 controllers), so
it relies on the assumption that we're making the matching config
changes across the pacemaker nodes.
Change-Id: I6369ab0c82dbf3c8f21043f8aa9ab810744ddc12
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In tripleo heat template, overcloud_controller_pacemaker.pp has a lot of
duplicate code to define haproxy and vip creation. This is an attempt
to refactor this.
Change-Id: I4cc6711911c1bfa1bc6063979e2b2a7ab5b8d37b
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Michele Baldessari
Sofer Athlan-Guyot
Jiri Stransky