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It turns out that reducing number of rabbitmq queues in cluster
significantly improves performance of cluster especially in the case of
failover recovery time. Right now the cluster uses ha-all mode for rabbitmq
queues.
It is best to change this to "ha-exactly" mode and reduce the number
of queue copies to ceil(N/2) where N is number of controllers in the
cluster - so in typical scenario of 3 controller It would be 2 by
default.
It does not make much sense to keep the copies of queues over whole
cluster since if the quorum of nodes is lost then the rest of cluster
nodes will be stopped anyway. We let the user override this with a
parameter.
I.e. for a 3 node controlplane cluster we will go from this:
pcs resource show rabbitmq
Resource: rabbitmq (class=ocf provider=heartbeat type=rabbitmq-cluster)
Attributes: set_policy="ha-all ^(?!amq\.).* {"ha-mode":"all"}"
To this:
pcs resource show rabbitmq
Resource: rabbitmq (class=ocf provider=heartbeat type=rabbitmq-cluster)
Attributes: set_policy="ha-all ^(?!amq\.).* {"ha-mode":"exactly","ha-params":2}"
According to Marin Krcmarik's testing recovery time from failure was
reduced significantly.
Co-Authored-By: Marian Krcmarik <mkrcmari@redhat.com>
Change-Id: Ib62001c03e1e08f58cf0c6e0ba07a8879a584084
Partial-Bug: #1628998
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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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As we are staring to manually check overcloud services
the first step is to check that the puppet profiles
are all aligned.
Changes applied:
No logic added or removed in this submission.
Removed unused parameters.
Align header comments structure.
All profiles parameters sorted following:
"Mandatory params first sorted alphabetically
then optional params sorted alphabetically."
Note: Following submissions will check pacemaker,
cinder, mistral and redis services in the base profiles
as some of them has the $pacemaker_master parameter
defaulted to true.
Change-Id: I2f91c3f6baa33f74b5625789eec83233179a9655
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Add RabbitMQ composable role, and keep the same logic that we had in
THT.
Implements: blueprint refactor-puppet-manifests
Change-Id: I961bdbe1cc6dd1d4a315de616439f9fc77d793ae
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Michele Baldessari
Jiri Stransky
Carlos Camacho
Emilien Macchi