// updateReplicationGraphForPromotedSlave makes sure the newly promoted slave // is correctly represented in the replication graph func (agent *ActionAgent) updateReplicationGraphForPromotedSlave(ctx context.Context, tablet *topo.TabletInfo) error { // Update tablet regardless - trend towards consistency. tablet.State = topo.STATE_READ_WRITE tablet.Type = topo.TYPE_MASTER tablet.Parent.Cell = "" tablet.Parent.Uid = topo.NO_TABLET tablet.Health = nil err := topo.UpdateTablet(ctx, agent.TopoServer, tablet) if err != nil { return err } // NOTE(msolomon) A serving graph update is required, but in // order for the shard to be consistent the old master must be // scrapped first. That is externally coordinated by the // wrangler reparent action. // Insert the new tablet location in the replication graph now that // we've updated the tablet. err = topo.UpdateTabletReplicationData(ctx, agent.TopoServer, tablet.Tablet) if err != nil && err != topo.ErrNodeExists { return err } return nil }