// NewServer returns a new instance of Server built from a config.
func NewServer(c *Config, version string) (*Server, error) {
s := &Server{
version: version,
err: make(chan error),
closing: make(chan struct{}),
Hostname: c.Meta.Hostname,
BindAddress: c.Meta.BindAddress,
MetaStore: meta.NewStore(c.Meta),
DataStore: db.NewStore(c.Data.Dir),
reportingDisabled: c.ReportingDisabled,
}
// Copy TSDB configuration.
s.DataStore.MaxWALSize = c.Data.MaxWALSize
s.DataStore.WALFlushInterval = time.Duration(c.Data.WALFlushInterval)
s.DataStore.WALPartitionFlushDelay = time.Duration(c.Data.WALPartitionFlushDelay)
// Set the shard mapper
s.ShardMapper = cluster.NewShardMapper(time.Duration(c.Cluster.ShardMapperTimeout))
s.ShardMapper.ForceRemoteMapping = c.Cluster.ForceRemoteShardMapping
s.ShardMapper.MetaStore = s.MetaStore
s.ShardMapper.DataStore = s.DataStore
// Initialize query executor.
s.QueryExecutor = db.NewQueryExecutor(s.DataStore)
s.QueryExecutor.MetaStore = s.MetaStore
s.QueryExecutor.MetaStatementExecutor = &meta.StatementExecutor{Store: s.MetaStore}
// Set the shard writer
s.ShardWriter = cluster.NewShardWriter(time.Duration(c.Cluster.ShardWriterTimeout))
s.ShardWriter.MetaStore = s.MetaStore
// Create the hinted handoff service
s.HintedHandoff = hh.NewService(c.HintedHandoff, s.ShardWriter)
// Initialize points writer.
s.MessagesWriter = cluster.NewMessagesWriter()
s.MessagesWriter.WriteTimeout = time.Duration(c.Cluster.WriteTimeout)
s.MessagesWriter.MetaStore = s.MetaStore
s.MessagesWriter.DataStore = s.DataStore
s.MessagesWriter.ShardWriter = s.ShardWriter
s.MessagesWriter.HintedHandoff = s.HintedHandoff
// Append services.
s.appendClusterService(c.Cluster)
s.appendSnapshotterService()
s.appendAdminService(c.Admin)
s.appendHTTPDService(c.HTTPD)
s.appendRetentionPolicyService(c.Retention)
return s, nil
}
// unpackMeta reads the metadata from the snapshot and initializes a raft
// cluster and replaces the root metadata.
func (cmd *Command) unpackMeta(mr *snapshot.MultiReader, sf snapshot.File, config *Config) error {
// Read meta into buffer.
var buf bytes.Buffer
if _, err := io.CopyN(&buf, mr, sf.Size); err != nil {
return fmt.Errorf("copy: %s", err)
}
// Unpack into metadata.
var data meta.Data
if err := data.UnmarshalBinary(buf.Bytes()); err != nil {
return fmt.Errorf("unmarshal: %s", err)
}
// Copy meta config and remove peers so it starts in single mode.
c := config.Meta
c.Peers = nil
// Initialize meta store.
store := meta.NewStore(config.Meta)
store.RaftListener = newNopListener()
store.ExecListener = newNopListener()
// Determine advertised address.
_, port, err := net.SplitHostPort(config.Meta.BindAddress)
if err != nil {
return fmt.Errorf("split bind address: %s", err)
}
hostport := net.JoinHostPort(config.Meta.Hostname, port)
// Resolve address.
addr, err := net.ResolveTCPAddr("tcp", hostport)
if err != nil {
return fmt.Errorf("resolve tcp: addr=%s, err=%s", hostport, err)
}
store.Addr = addr
// Open the meta store.
if err := store.Open(); err != nil {
return fmt.Errorf("open store: %s", err)
}
defer store.Close()
// Wait for the store to be ready or error.
select {
case <-store.Ready():
case err := <-store.Err():
return err
}
// Force set the full metadata.
if err := store.SetData(&data); err != nil {
return fmt.Errorf("set data: %s", err)
}
return nil
}