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From 8b9c49fd965f73709d5a6e2c21987ba26af4856b Mon Sep 17 00:00:00 2001
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From: Luca Miccini <lmiccini@redhat.com>
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Date: Wed, 25 Sep 2019 17:12:39 +0200
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Subject: [PATCH] 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
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failing with 'Failed to get "write" lock - Is another process using the
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image' errors.
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This has been tracked down to grace/lease timeouts not having expired
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before attempting the migration/evacuate, so in this cases it might be
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desirable to delay the nova evacuate call to give the storage time to
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release the locks.
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Change-Id: Ie2fe784202d754eda38092479b1ab3ff4d02136a
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Resolves: rhbz#1740069
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---
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diff --git a/heartbeat/NovaEvacuate b/heartbeat/NovaEvacuate
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index 810f30a..596f520 100644
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--- a/heartbeat/NovaEvacuate
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+++ b/heartbeat/NovaEvacuate
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@@ -125,6 +125,15 @@
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<content type="boolean" default="0" />
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</parameter>
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+<parameter name="evacuate_delay" unique="0" required="0">
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+<longdesc lang="en">
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+Allows delaying the nova evacuate API call, e.g. to give a storage array time to clean
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+up eventual locks/leases.
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+</longdesc>
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+<shortdesc lang="en">Nova evacuate delay</shortdesc>
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+<content type="integer" default="0" />
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+</parameter>
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+
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</parameters>
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<actions>
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@@ -216,6 +225,11 @@
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fence_agent="fence_evacuate"
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fi
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+ if [ ${OCF_RESKEY_evacuate_delay} != 0 ]; then
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+ ocf_log info "Delaying nova evacuate by $OCF_RESKEY_evacuate_delay seconds"
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+ sleep ${OCF_RESKEY_evacuate_delay}
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+ fi
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+
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ocf_log notice "Initiating evacuation of $node with $fence_agent"
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$fence_agent ${fence_options} -o status -n ${node}
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if [ $? = 1 ]; then
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