示例#1
0
// change a tablet type to RESTORE and set all the other arguments.
// from now on, we can go to:
// - back to IDLE if we don't use the tablet at all (after for instance
//   a successful ReserveForRestore but a failed Snapshot)
// - to SCRAP if something in the process on the target host fails
// - to SPARE if the clone works
func (agent *ActionAgent) changeTypeToRestore(ctx context.Context, tablet, sourceTablet *topo.TabletInfo, parentAlias topo.TabletAlias, keyRange key.KeyRange) error {
	// run the optional preflight_assigned hook
	hk := hook.NewSimpleHook("preflight_assigned")
	topotools.ConfigureTabletHook(hk, agent.TabletAlias)
	if err := hk.ExecuteOptional(); err != nil {
		return err
	}

	// change the type
	tablet.Parent = parentAlias
	tablet.Keyspace = sourceTablet.Keyspace
	tablet.Shard = sourceTablet.Shard
	tablet.Type = topo.TYPE_RESTORE
	tablet.KeyRange = keyRange
	tablet.DbNameOverride = sourceTablet.DbNameOverride
	if err := topo.UpdateTablet(ctx, agent.TopoServer, tablet); err != nil {
		return err
	}

	// and create the replication graph items
	return topo.UpdateTabletReplicationData(ctx, agent.TopoServer, tablet.Tablet)
}
示例#2
0
// ExecuteHook executes the provided hook locally, and returns the result.
// Should be called under RpcWrapLockAction.
func (agent *ActionAgent) ExecuteHook(ctx context.Context, hk *hook.Hook) *hook.HookResult {
	topotools.ConfigureTabletHook(hk, agent.TabletAlias)
	return hk.Execute()
}