func (ls *Stores) readBootstrapInfoLocked(bi *gossip.BootstrapInfo) error {
latestTS := roachpb.ZeroTimestamp
timestamps := map[roachpb.StoreID]roachpb.Timestamp{}
// Find the most recent bootstrap info, collecting timestamps for
// each store along the way.
for id, s := range ls.storeMap {
var storeBI gossip.BootstrapInfo
ok, err := engine.MVCCGetProto(s.engine, keys.StoreGossipKey(), roachpb.ZeroTimestamp, true, nil, &storeBI)
if err != nil {
return err
}
timestamps[id] = storeBI.Timestamp
if ok && latestTS.Less(storeBI.Timestamp) {
latestTS = storeBI.Timestamp
*bi = storeBI
}
}
// Update all stores with an earlier timestamp.
for id, s := range ls.storeMap {
if timestamps[id].Less(latestTS) {
if err := engine.MVCCPutProto(s.engine, nil, keys.StoreGossipKey(), roachpb.ZeroTimestamp, nil, bi); err != nil {
return err
}
log.Infof("updated gossip bootstrap info to %s", s)
}
}
ls.biLatestTS = latestTS
return nil
}
// WriteBootstrapInfo implements the gossip.Storage interface. Write
// persists the supplied bootstrap info to every known store. Returns
// nil on success; otherwise returns first error encountered writing
// to the stores.
func (ls *Stores) WriteBootstrapInfo(bi *gossip.BootstrapInfo) error {
ls.mu.RLock()
defer ls.mu.RUnlock()
ls.biLatestTS = ls.clock.Now()
bi.Timestamp = ls.biLatestTS
for _, s := range ls.storeMap {
if err := engine.MVCCPutProto(s.engine, nil, keys.StoreGossipKey(), roachpb.ZeroTimestamp, nil, bi); err != nil {
return err
}
log.Infof("wrote gossip bootstrap info to %s", s)
}
return nil
}
func (ls *Stores) updateBootstrapInfo(bi *gossip.BootstrapInfo) error {
if bi.Timestamp.Less(ls.biLatestTS) {
return nil
}
// Update the latest timestamp and set cached version.
ls.biLatestTS = bi.Timestamp
ls.latestBI = protoutil.Clone(bi).(*gossip.BootstrapInfo)
// Update all stores.
for _, s := range ls.storeMap {
if err := engine.MVCCPutProto(context.Background(), s.engine, nil, keys.StoreGossipKey(), hlc.ZeroTimestamp, nil, bi); err != nil {
return err
}
}
return nil
}
// ReadBootstrapInfo implements the gossip.Storage interface. Read
// attempts to read gossip bootstrap info from every known store and
// finds the most recent from all stores to initialize the bootstrap
// info argument. Returns an error on any issues reading data for the
// stores (but excluding the case in which no data has been persisted
// yet).
func (ls *Stores) ReadBootstrapInfo(bi *gossip.BootstrapInfo) error {
ls.mu.RLock()
defer ls.mu.RUnlock()
latestTS := hlc.ZeroTimestamp
// Find the most recent bootstrap info.
for _, s := range ls.storeMap {
var storeBI gossip.BootstrapInfo
ok, err := engine.MVCCGetProto(context.Background(), s.engine, keys.StoreGossipKey(), hlc.ZeroTimestamp, true, nil, &storeBI)
if err != nil {
return err
}
if ok && latestTS.Less(storeBI.Timestamp) {
latestTS = storeBI.Timestamp
*bi = storeBI
}
}
log.Infof("read %d node addresses from persistent storage", len(bi.Addresses))
return ls.updateBootstrapInfo(bi)
}