x/openstack-resource-agents
Code Issues Proposed changes

Add a configurable delay to Nova Evacuate calls

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In case /var/lib/nova/instances resides on NFS we have seen migrations
failing with 'Failed to get "write" lock - Is another process using the
image' errors.

This has been tracked down to grace/lease timeouts not having expired
before attempting the migration/evacuate, so in this cases it might be
desirable to delay the nova evacuate call to give the storage time to
release the locks.

Change-Id: Ie2fe784202d754eda38092479b1ab3ff4d02136a
Resolves: rhbz#1740069
This commit is contained in:
Luca Miccini 2019-09-25 17:12:39 +02:00
parent 41387bf09d
commit 8b9c49fd96
1 changed files with 14 additions and 0 deletions
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14
ocf/NovaEvacuate
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@ -125,6 +125,15 @@ Enable extra logging from the evacuation process
<content type="boolean" default="0" /> <content type="boolean" default="0" />
</parameter> </parameter>
<parameter name="evacuate_delay" unique="0" required="0">
<longdesc lang="en">
Allows delaying the nova evacuate API call, e.g. to give a storage array time to clean
up eventual locks/leases.
</longdesc>
<shortdesc lang="en">Nova evacuate delay</shortdesc>
<content type="integer" default="0" />
</parameter>
</parameters> </parameters>
<actions> <actions>
@ -216,6 +225,11 @@ handle_evacuations() {
fence_agent="fence_evacuate" fence_agent="fence_evacuate"
fi fi
if [ ${OCF_RESKEY_evacuate_delay} != 0 ]; then
ocf_log info "Delaying nova evacuate by $OCF_RESKEY_evacuate_delay seconds"
sleep ${OCF_RESKEY_evacuate_delay}
fi
ocf_log notice "Initiating evacuation of $node with $fence_agent" ocf_log notice "Initiating evacuation of $node with $fence_agent"
$fence_agent ${fence_options} -o status -n ${node} $fence_agent ${fence_options} -o status -n ${node}
if [ $? = 1 ]; then if [ $? = 1 ]; then