Live Migration Fails Due to RPC Timeout

Problem

Attempts to perform a live migration of an instance fail with an error similar to the below on the source host.

Environment

• Platform9 Managed OpenStack - All Versions

• Volume-Backed Storage

Cause

Attempting a live migration of an instance with multiple attached volumes may fail pre-migration checks due to an RPC timeout.

Resolution

1. Increase the default RPC timeout of 60 seconds using an override in /opt/pf9/etc/nova/conf.d/nova_override.conf, as shown here.

2. Restart the pf9-ostackhost service.

3. Retry the migration operation and further increase the RPC timeout if necessary.

Additional Information

For more information on Nova configuration options, please refer to the following OpenStack documentation.

Nova (Pike) Configuration Options