// DeleteTablet implements topo.Server.
func (s *Server) DeleteTablet(ctx context.Context, tabletAlias topo.TabletAlias) error {
cell, err := s.getCell(tabletAlias.Cell)
if err != nil {
return err
}
// Get the keyspace and shard names for the TabletChange event.
ti, tiErr := s.GetTablet(ctx, tabletAlias)
_, err = cell.Delete(tabletDirPath(tabletAlias.String()), true /* recursive */)
if err != nil {
return convertError(err)
}
// Only try to log if we have the required info.
if tiErr == nil {
// Only copy the identity info for the tablet. The rest has been deleted.
event.Dispatch(&events.TabletChange{
Tablet: topo.Tablet{
Alias: ti.Tablet.Alias,
Keyspace: ti.Tablet.Keyspace,
Shard: ti.Tablet.Shard,
},
Status: "deleted",
})
}
return nil
}
func (ar *ActionRepository) ApplyTabletAction(actionName string, tabletAlias topo.TabletAlias, r *http.Request) *ActionResult {
result := &ActionResult{Name: actionName, Parameters: tabletAlias.String()}
action, ok := ar.tabletActions[actionName]
if !ok {
result.error("Unknown tablet action")
return result
}
// check the role
if action.role != "" {
if err := acl.CheckAccessHTTP(r, action.role); err != nil {
result.error("Access denied")
return result
}
}
// run the action
ar.wr.ResetActionTimeout(wrangler.DefaultActionTimeout)
output, err := action.method(ar.wr, tabletAlias, r)
if err != nil {
result.error(err.Error())
return result
}
result.Output = output
return result
}
// ApplyTabletAction applies the provided action to the tablet.
func (ar *ActionRepository) ApplyTabletAction(ctx context.Context, actionName string, tabletAlias topo.TabletAlias, r *http.Request) *ActionResult {
result := &ActionResult{Name: actionName, Parameters: tabletAlias.String()}
action, ok := ar.tabletActions[actionName]
if !ok {
result.error("Unknown tablet action")
return result
}
// check the role
if action.role != "" {
if err := acl.CheckAccessHTTP(r, action.role); err != nil {
result.error("Access denied")
return result
}
}
// run the action
ctx, cancel := context.WithTimeout(ctx, *actionTimeout)
wr := wrangler.New(logutil.NewConsoleLogger(), ar.ts, tmclient.NewTabletManagerClient(), *lockTimeout)
output, err := action.method(ctx, wr, tabletAlias, r)
cancel()
if err != nil {
result.error(err.Error())
return result
}
result.Output = output
return result
}
// RecordTabletTagAction records a new TabletTagAction
// into the specified Cleaner
func RecordTabletTagAction(cleaner *Cleaner, tabletAlias topo.TabletAlias, name, value string) {
cleaner.Record(TabletTagActionName, tabletAlias.String(), &TabletTagAction{
TabletAlias: tabletAlias,
Name: name,
Value: value,
})
}
// FIXME(msolomon) This validate presumes the master is up and running.
// Even when that isn't true, there are validation processes that might be valuable.
func (wr *Wrangler) validateShard(keyspace, shard string, pingTablets bool, wg *sync.WaitGroup, results chan<- vresult) {
shardInfo, err := wr.ts.GetShard(keyspace, shard)
if err != nil {
results <- vresult{keyspace + "/" + shard, err}
return
}
aliases, err := topo.FindAllTabletAliasesInShard(wr.ts, keyspace, shard)
if err != nil {
results <- vresult{keyspace + "/" + shard, err}
}
tabletMap, _ := GetTabletMap(wr.ts, aliases)
var masterAlias topo.TabletAlias
for _, alias := range aliases {
tabletInfo, ok := tabletMap[alias]
if !ok {
results <- vresult{alias.String(), fmt.Errorf("tablet not found in map")}
continue
}
if tabletInfo.Parent.Uid == topo.NO_TABLET {
if masterAlias.Cell != "" {
results <- vresult{alias.String(), fmt.Errorf("tablet already has a master %v", masterAlias)}
} else {
masterAlias = alias
}
}
}
if masterAlias.Cell == "" {
results <- vresult{keyspace + "/" + shard, fmt.Errorf("no master for shard")}
} else if shardInfo.MasterAlias != masterAlias {
results <- vresult{keyspace + "/" + shard, fmt.Errorf("master mismatch for shard: found %v, expected %v", masterAlias, shardInfo.MasterAlias)}
}
for _, alias := range aliases {
tabletReplicationPath := masterAlias.String()
if alias != masterAlias {
tabletReplicationPath += "/" + alias.String()
}
wg.Add(1)
go func(alias topo.TabletAlias) {
results <- vresult{tabletReplicationPath, topo.Validate(wr.ts, alias, tabletReplicationPath)}
wg.Done()
}(alias)
}
if pingTablets {
wr.validateReplication(shardInfo, tabletMap, results)
wr.pingTablets(tabletMap, wg, results)
}
return
}
// FindChangeSlaveTypeActionByTarget finds the first action for the target
func FindChangeSlaveTypeActionByTarget(cleaner *Cleaner, tabletAlias topo.TabletAlias) (*ChangeSlaveTypeAction, error) {
action, err := cleaner.GetActionByName(ChangeSlaveTypeActionName, tabletAlias.String())
if err != nil {
return nil, err
}
result, ok := action.(*ChangeSlaveTypeAction)
if !ok {
return nil, fmt.Errorf("Action with wrong type: %v", action)
}
return result, nil
}
// helper method to asynchronously diff a schema
func (wr *Wrangler) diffSchema(masterSchema *mysqlctl.SchemaDefinition, masterTabletAlias, alias topo.TabletAlias, includeViews bool, wg *sync.WaitGroup, er concurrency.ErrorRecorder) {
defer wg.Done()
relog.Info("Gathering schema for %v", alias)
slaveSchema, err := wr.GetSchema(alias, nil, includeViews)
if err != nil {
er.RecordError(err)
return
}
relog.Info("Diffing schema for %v", alias)
mysqlctl.DiffSchema(masterTabletAlias.String(), masterSchema, alias.String(), slaveSchema, er)
}
// diffPermissions is a helper method to asynchronously diff a permissions
func (wr *Wrangler) diffPermissions(ctx context.Context, masterPermissions *myproto.Permissions, masterAlias topo.TabletAlias, alias topo.TabletAlias, wg *sync.WaitGroup, er concurrency.ErrorRecorder) {
defer wg.Done()
log.Infof("Gathering permissions for %v", alias)
slavePermissions, err := wr.GetPermissions(ctx, alias)
if err != nil {
er.RecordError(err)
return
}
log.Infof("Diffing permissions for %v", alias)
myproto.DiffPermissions(masterAlias.String(), masterPermissions, alias.String(), slavePermissions, er)
}
// helper method to asynchronously diff a schema
func (wr *Wrangler) diffSchema(ctx context.Context, masterSchema *myproto.SchemaDefinition, masterTabletAlias, alias topo.TabletAlias, excludeTables []string, includeViews bool, wg *sync.WaitGroup, er concurrency.ErrorRecorder) {
defer wg.Done()
log.Infof("Gathering schema for %v", alias)
slaveSchema, err := wr.GetSchema(ctx, alias, nil, excludeTables, includeViews)
if err != nil {
er.RecordError(err)
return
}
log.Infof("Diffing schema for %v", alias)
myproto.DiffSchema(masterTabletAlias.String(), masterSchema, alias.String(), slaveSchema, er)
}
func (ar *ActionRepository) ApplyTabletAction(actionName string, tabletAlias topo.TabletAlias, r *http.Request) *ActionResult {
result := &ActionResult{Name: actionName, Parameters: tabletAlias.String()}
action, ok := ar.tabletActions[actionName]
if !ok {
result.error("Unknown tablet action")
return result
}
ar.wr.ResetActionTimeout(wrangler.DefaultActionTimeout)
output, err := action(ar.wr, tabletAlias, r)
if err != nil {
result.error(err.Error())
return result
}
result.Output = output
return result
}
// GetTablet implements topo.Server.
func (s *Server) GetTablet(ctx context.Context, tabletAlias topo.TabletAlias) (*topo.TabletInfo, error) {
cell, err := s.getCell(tabletAlias.Cell)
if err != nil {
return nil, err
}
resp, err := cell.Get(tabletFilePath(tabletAlias.String()), false /* sort */, false /* recursive */)
if err != nil {
return nil, convertError(err)
}
if resp.Node == nil {
return nil, ErrBadResponse
}
value := &topo.Tablet{}
if err := json.Unmarshal([]byte(resp.Node.Value), value); err != nil {
return nil, fmt.Errorf("bad tablet data (%v): %q", err, resp.Node.Value)
}
return topo.NewTabletInfo(value, int64(resp.Node.ModifiedIndex)), nil
}
// add TABLET_ALIAS to environment
func configureTabletHook(hk *hook.Hook, tabletAlias topo.TabletAlias) {
if hk.ExtraEnv == nil {
hk.ExtraEnv = make(map[string]string, 1)
}
hk.ExtraEnv["TABLET_ALIAS"] = tabletAlias.String()
}
// RecordChangeSlaveTypeAction records a new ChangeSlaveTypeAction
// into the specified Cleaner
func RecordChangeSlaveTypeAction(cleaner *Cleaner, tabletAlias topo.TabletAlias, tabletType topo.TabletType) {
cleaner.Record(ChangeSlaveTypeActionName, tabletAlias.String(), &ChangeSlaveTypeAction{
TabletAlias: tabletAlias,
TabletType: tabletType,
})
}
// PopulateReparentJournal adds an entry into the reparent_journal table.
func (agent *ActionAgent) PopulateReparentJournal(ctx context.Context, timeCreatedNS int64, actionName string, masterAlias topo.TabletAlias, pos myproto.ReplicationPosition) error {
cmds := mysqlctl.CreateReparentJournal()
cmds = append(cmds, mysqlctl.PopulateReparentJournal(timeCreatedNS, actionName, masterAlias.String(), pos))
return agent.MysqlDaemon.ExecuteSuperQueryList(cmds)
}
// GetTabletPath implements vtctld Explorer.
func (ex Explorer) GetTabletPath(alias topo.TabletAlias) string {
return path.Join(explorerRoot, alias.Cell, tabletDirPath(alias.String()))
}
// RecordStartBlpAction records a new StartBlpAction
// into the specified Cleaner
func RecordStartBlpAction(cleaner *Cleaner, tabletAlias topo.TabletAlias, waitTime time.Duration) {
cleaner.Record(StartBlpActionName, tabletAlias.String(), &StartBlpAction{
TabletAlias: tabletAlias,
WaitTime: waitTime,
})
}
