// 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
}
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})
}