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Virtual Machines Enter Paused State on OpenStack Host After ONTAP Upgrade

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Applies to

  • NetApp AFF-A700
  • ONTAP 9.15.1P8 (Cluster-Mode)
  • OpenStack/KVM environments using Platform9 VM-HA
  • iSCSI-attached Linux compute nodes

Issue

After performing an ONTAP upgrade, a single OpenStack/KVM compute host experienced an outage. All virtual machines running on this host entered a paused state. The issue was resolved after the host was rebooted.

Relevant log output from /var/log/pf9/pf9-vmha-agent.log:

ERROR "unable to send payload to hamgr" status=503
INFO  "Not able to reach hamgr"
INFO  "All hosts and DU not reachable assuming current host is offline, pausing all domains"
INFO  Running command "[sudo virsh suspend <uuid>]" (repeated for all 28 domains)

Additional log output from /var/log/pf9/ostackhost.log:

ERROR nova.virt.driver [...] Exception dispatching event <LifecycleEvent:...Paused>: Remote error: DBConnectionError (pymysql.err.OperationalError) (2013, 'Lost connection to MySQL server during query')

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