Instance made ACTIVE before replication is started

Bug #1465604 reported by Doug Shelley on 2015-06-16
10
This bug affects 2 people
Affects Status Importance Assigned to Milestone
OpenStack DBaaS (Trove)
Medium
Doug Shelley

Bug Description

Currently the guest prepare code on Mysql looks like the following:
    def prepare(self, context, packages, databases, memory_mb, users,
                device_path=None, mount_point=None, backup_info=None,
                config_contents=None, root_password=None, overrides=None,
                cluster_config=None, snapshot=None):
        """Makes ready DBAAS on a Guest container."""
        MySqlAppStatus.get().begin_install()
...
<snip>
...
 app.complete_install_or_restart()
...
<snip>
...
   if snapshot:
            self.attach_replica(context, snapshot, snapshot['config'])

The complete_install_or_restart call puts the instance in ACTIVE state, however the attach_replica call hasn't been made. It is during this call that the instance is configured as a slave and connected to the master to start replication.

For an instance that is being configured as a replica, it would make sense to not have it go active until after the attach_replica call is made.

Doug Shelley (0-doug) on 2015-06-16
Changed in trove:
assignee: nobody → Doug Shelley (0-doug)
milestone: none → liberty-2
Changed in trove:
status: New → Triaged
importance: Undecided → Medium
Changed in trove:
milestone: liberty-2 → liberty-3
Changed in trove:
milestone: liberty-3 → next
Changed in trove:
milestone: next → liberty-rc1
Changed in trove:
milestone: liberty-rc1 → mitaka-1
György Szombathelyi (gyurco) wrote :

It seems, when the replica goes ACTIVE, the taskmanager immediately deletes the snapshot backup, so the slave will fail, since it cannot restore the master's state from the snapshot.

Changed in trove:
milestone: mitaka-1 → mitaka-3
Amrith Kumar (amrith) on 2016-03-11
Changed in trove:
milestone: mitaka-3 → mitaka-rc1
Doug Shelley (0-doug) on 2016-03-11
Changed in trove:
milestone: mitaka-rc1 → newton-1
Amrith Kumar (amrith) on 2016-09-18
Changed in trove:
milestone: newton-1 → ongoing
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