// NewQueryExecutor returns a new instance of QueryExecutor.
// This query executor always has a node id of 0.
func NewQueryExecutor() *QueryExecutor {
e := &QueryExecutor{
QueryExecutor: cluster.NewQueryExecutor(),
}
e.Node = &influxdb.Node{ID: 0}
e.QueryExecutor.MetaClient = &e.MetaClient
e.QueryExecutor.TSDBStore = &e.TSDBStore
e.QueryExecutor.LogOutput = &e.LogOutput
if testing.Verbose() {
e.QueryExecutor.LogOutput = io.MultiWriter(e.QueryExecutor.LogOutput, os.Stderr)
}
return e
}
// NewServer returns a new instance of Server built from a config.
func NewServer(c *Config, buildInfo *BuildInfo) (*Server, error) {
// We need to ensure that a meta directory always exists even if
// we don't start the meta store. node.json is always stored under
// the meta directory.
if err := os.MkdirAll(c.Meta.Dir, 0777); err != nil {
return nil, fmt.Errorf("mkdir all: %s", err)
}
// 0.10-rc1 and prior would sometimes put the node.json at the root
// dir which breaks backup/restore and restarting nodes. This moves
// the file from the root so it's always under the meta dir.
oldPath := filepath.Join(filepath.Dir(c.Meta.Dir), "node.json")
newPath := filepath.Join(c.Meta.Dir, "node.json")
if _, err := os.Stat(oldPath); err == nil {
if err := os.Rename(oldPath, newPath); err != nil {
return nil, err
}
}
_, err := influxdb.LoadNode(c.Meta.Dir)
if err != nil {
if !os.IsNotExist(err) {
return nil, err
}
}
// Check to see if there is a raft db, if so, error out with a message
// to downgrade, export, and then import the meta data
raftFile := filepath.Join(c.Meta.Dir, "raft.db")
if _, err := os.Stat(raftFile); err == nil {
return nil, fmt.Errorf("detected %s. To proceed, you'll need to either 1) downgrade to v0.11.x, export your metadata, upgrade to the current version again, and then import the metadata or 2) delete the file, which will effectively reset your database. For more assistance with the upgrade, see: https://docs.influxdata.com/influxdb/v0.12/administration/upgrading/", raftFile)
}
// In 0.10.0 bind-address got moved to the top level. Check
// The old location to keep things backwards compatible
bind := c.BindAddress
s := &Server{
buildInfo: *buildInfo,
err: make(chan error),
closing: make(chan struct{}),
BindAddress: bind,
MetaClient: meta.NewClient(c.Meta),
Monitor: monitor.New(c.Monitor),
reportingDisabled: c.ReportingDisabled,
httpAPIAddr: c.HTTPD.BindAddress,
httpUseTLS: c.HTTPD.HTTPSEnabled,
tcpAddr: bind,
config: c,
}
if err := s.MetaClient.Open(); err != nil {
return nil, err
}
s.TSDBStore = tsdb.NewStore(c.Data.Dir)
s.TSDBStore.EngineOptions.Config = c.Data
// Copy TSDB configuration.
s.TSDBStore.EngineOptions.EngineVersion = c.Data.Engine
// Create the Subscriber service
s.Subscriber = subscriber.NewService(c.Subscriber)
// Initialize points writer.
s.PointsWriter = cluster.NewPointsWriter()
s.PointsWriter.WriteTimeout = time.Duration(c.Cluster.WriteTimeout)
s.PointsWriter.TSDBStore = s.TSDBStore
s.PointsWriter.Subscriber = s.Subscriber
// Initialize query executor.
s.QueryExecutor = cluster.NewQueryExecutor()
s.QueryExecutor.MetaClient = s.MetaClient
s.QueryExecutor.TSDBStore = s.TSDBStore
s.QueryExecutor.Monitor = s.Monitor
s.QueryExecutor.PointsWriter = s.PointsWriter
s.QueryExecutor.QueryTimeout = time.Duration(c.Cluster.QueryTimeout)
s.QueryExecutor.QueryManager = influxql.DefaultQueryManager(c.Cluster.MaxConcurrentQueries)
s.QueryExecutor.MaxSelectPointN = c.Cluster.MaxSelectPointN
s.QueryExecutor.MaxSelectSeriesN = c.Cluster.MaxSelectSeriesN
s.QueryExecutor.MaxSelectBucketsN = c.Cluster.MaxSelectBucketsN
if c.Data.QueryLogEnabled {
s.QueryExecutor.LogOutput = os.Stderr
}
// Initialize the monitor
s.Monitor.Version = s.buildInfo.Version
s.Monitor.Commit = s.buildInfo.Commit
s.Monitor.Branch = s.buildInfo.Branch
s.Monitor.BuildTime = s.buildInfo.Time
s.Monitor.PointsWriter = (*monitorPointsWriter)(s.PointsWriter)
return s, nil
}