Ejemplo n.º 1
0
// Operate on a backup tablet. Shutdown mysqld and copy the data files aside.
func (ta *TabletActor) snapshot(actionNode *ActionNode) error {
	args := actionNode.args.(*SnapshotArgs)

	tablet, err := ta.ts.GetTablet(ta.tabletAlias)
	if err != nil {
		return err
	}

	if tablet.Type != topo.TYPE_BACKUP {
		return fmt.Errorf("expected backup type, not %v: %v", tablet.Type, ta.tabletAlias)
	}

	filename, slaveStartRequired, readOnly, err := ta.mysqld.CreateSnapshot(tablet.DbName(), tablet.Addr, false, args.Concurrency, args.ServerMode, map[string]string{"TABLET_ALIAS": ta.tabletAlias.String()})
	if err != nil {
		return err
	}

	sr := &SnapshotReply{ManifestPath: filename, SlaveStartRequired: slaveStartRequired, ReadOnly: readOnly}
	if tablet.Parent.Uid == topo.NO_TABLET {
		// If this is a master, this will be the new parent.
		// FIXME(msolomon) this doesn't work in hierarchical replication.
		sr.ParentAlias = tablet.Alias()
		sr.ZkParentPath = tablet.Path() // XXX
	} else {
		sr.ParentAlias = tablet.Parent
		sr.ZkParentPath = zktopo.TabletPathForAlias(tablet.Parent) // XXX
	}
	actionNode.reply = sr
	return nil
}
Ejemplo n.º 2
0
func (ai *ActionInitiator) Restore(dstTabletAlias topo.TabletAlias, args *RestoreArgs) (actionPath string, err error) {
	args.ZkSrcTabletPath = zktopo.TabletPathForAlias(args.SrcTabletAlias) // XXX
	args.ZkParentPath = zktopo.TabletPathForAlias(args.ParentAlias)       // XXX
	return ai.writeTabletAction(dstTabletAlias, &ActionNode{Action: TABLET_ACTION_RESTORE, args: args})
}