/usr/share/gocode/src/github.com/influxdata/influxdb/cmd/influxd/run/server.go is in golang-github-influxdb-influxdb-dev 1.1.1+dfsg1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import (
"fmt"
"io"
"log"
"net"
"os"
"path/filepath"
"runtime"
"runtime/pprof"
"time"
"github.com/influxdata/influxdb"
"github.com/influxdata/influxdb/coordinator"
"github.com/influxdata/influxdb/influxql"
"github.com/influxdata/influxdb/models"
"github.com/influxdata/influxdb/monitor"
"github.com/influxdata/influxdb/services/admin"
"github.com/influxdata/influxdb/services/collectd"
"github.com/influxdata/influxdb/services/continuous_querier"
"github.com/influxdata/influxdb/services/graphite"
"github.com/influxdata/influxdb/services/httpd"
"github.com/influxdata/influxdb/services/meta"
"github.com/influxdata/influxdb/services/opentsdb"
"github.com/influxdata/influxdb/services/precreator"
"github.com/influxdata/influxdb/services/retention"
"github.com/influxdata/influxdb/services/snapshotter"
"github.com/influxdata/influxdb/services/subscriber"
"github.com/influxdata/influxdb/services/udp"
"github.com/influxdata/influxdb/tcp"
"github.com/influxdata/influxdb/tsdb"
client "github.com/influxdata/usage-client/v1"
// Initialize the engine packages
_ "github.com/influxdata/influxdb/tsdb/engine"
)
var startTime time.Time
func init() {
startTime = time.Now().UTC()
}
// BuildInfo represents the build details for the server code.
type BuildInfo struct {
Version string
Commit string
Branch string
Time string
}
// Server represents a container for the metadata and storage data and services.
// It is built using a Config and it manages the startup and shutdown of all
// services in the proper order.
type Server struct {
buildInfo BuildInfo
err chan error
closing chan struct{}
BindAddress string
Listener net.Listener
Logger *log.Logger
MetaClient *meta.Client
TSDBStore *tsdb.Store
QueryExecutor *influxql.QueryExecutor
PointsWriter *coordinator.PointsWriter
Subscriber *subscriber.Service
Services []Service
// These references are required for the tcp muxer.
SnapshotterService *snapshotter.Service
Monitor *monitor.Monitor
// Server reporting and registration
reportingEnabled bool
// Profiling
CPUProfile string
MemProfile string
// httpAPIAddr is the host:port combination for the main HTTP API for querying and writing data
httpAPIAddr string
// httpUseTLS specifies if we should use a TLS connection to the http servers
httpUseTLS bool
// tcpAddr is the host:port combination for the TCP listener that services mux onto
tcpAddr string
config *Config
// logOutput is the writer to which all services should be configured to
// write logs to after appension.
logOutput io.Writer
}
// 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
}
}
if err := raftDBExists(c.Meta.Dir); err != nil {
return nil, err
}
// 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,
Logger: log.New(os.Stderr, "", log.LstdFlags),
MetaClient: meta.NewClient(c.Meta),
reportingEnabled: c.ReportingEnabled,
httpAPIAddr: c.HTTPD.BindAddress,
httpUseTLS: c.HTTPD.HTTPSEnabled,
tcpAddr: bind,
config: c,
logOutput: os.Stderr,
}
s.Monitor = monitor.New(s, c.Monitor)
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 = coordinator.NewPointsWriter()
s.PointsWriter.WriteTimeout = time.Duration(c.Coordinator.WriteTimeout)
s.PointsWriter.TSDBStore = s.TSDBStore
s.PointsWriter.Subscriber = s.Subscriber
// Initialize query executor.
s.QueryExecutor = influxql.NewQueryExecutor()
s.QueryExecutor.StatementExecutor = &coordinator.StatementExecutor{
MetaClient: s.MetaClient,
TaskManager: s.QueryExecutor.TaskManager,
TSDBStore: coordinator.LocalTSDBStore{Store: s.TSDBStore},
Monitor: s.Monitor,
PointsWriter: s.PointsWriter,
MaxSelectPointN: c.Coordinator.MaxSelectPointN,
MaxSelectSeriesN: c.Coordinator.MaxSelectSeriesN,
MaxSelectBucketsN: c.Coordinator.MaxSelectBucketsN,
}
s.QueryExecutor.TaskManager.QueryTimeout = time.Duration(c.Coordinator.QueryTimeout)
s.QueryExecutor.TaskManager.LogQueriesAfter = time.Duration(c.Coordinator.LogQueriesAfter)
s.QueryExecutor.TaskManager.MaxConcurrentQueries = c.Coordinator.MaxConcurrentQueries
// 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
}
func (s *Server) Statistics(tags map[string]string) []models.Statistic {
var statistics []models.Statistic
statistics = append(statistics, s.QueryExecutor.Statistics(tags)...)
statistics = append(statistics, s.TSDBStore.Statistics(tags)...)
statistics = append(statistics, s.PointsWriter.Statistics(tags)...)
statistics = append(statistics, s.Subscriber.Statistics(tags)...)
for _, srv := range s.Services {
if m, ok := srv.(monitor.Reporter); ok {
statistics = append(statistics, m.Statistics(tags)...)
}
}
return statistics
}
func (s *Server) appendSnapshotterService() {
srv := snapshotter.NewService()
srv.TSDBStore = s.TSDBStore
srv.MetaClient = s.MetaClient
s.Services = append(s.Services, srv)
s.SnapshotterService = srv
}
// SetLogOutput sets the logger used for all messages. It must not be called
// after the Open method has been called.
func (s *Server) SetLogOutput(w io.Writer) {
s.Logger = log.New(os.Stderr, "", log.LstdFlags)
s.logOutput = w
}
func (s *Server) appendMonitorService() {
s.Services = append(s.Services, s.Monitor)
}
func (s *Server) appendRetentionPolicyService(c retention.Config) {
if !c.Enabled {
return
}
srv := retention.NewService(c)
srv.MetaClient = s.MetaClient
srv.TSDBStore = s.TSDBStore
s.Services = append(s.Services, srv)
}
func (s *Server) appendAdminService(c admin.Config) {
if !c.Enabled {
return
}
c.Version = s.buildInfo.Version
srv := admin.NewService(c)
s.Services = append(s.Services, srv)
}
func (s *Server) appendHTTPDService(c httpd.Config) {
if !c.Enabled {
return
}
srv := httpd.NewService(c)
srv.Handler.MetaClient = s.MetaClient
srv.Handler.QueryAuthorizer = meta.NewQueryAuthorizer(s.MetaClient)
srv.Handler.WriteAuthorizer = meta.NewWriteAuthorizer(s.MetaClient)
srv.Handler.QueryExecutor = s.QueryExecutor
srv.Handler.Monitor = s.Monitor
srv.Handler.PointsWriter = s.PointsWriter
srv.Handler.Version = s.buildInfo.Version
s.Services = append(s.Services, srv)
}
func (s *Server) appendCollectdService(c collectd.Config) {
if !c.Enabled {
return
}
srv := collectd.NewService(c)
srv.MetaClient = s.MetaClient
srv.PointsWriter = s.PointsWriter
s.Services = append(s.Services, srv)
}
func (s *Server) appendOpenTSDBService(c opentsdb.Config) error {
if !c.Enabled {
return nil
}
srv, err := opentsdb.NewService(c)
if err != nil {
return err
}
srv.PointsWriter = s.PointsWriter
srv.MetaClient = s.MetaClient
s.Services = append(s.Services, srv)
return nil
}
func (s *Server) appendGraphiteService(c graphite.Config) error {
if !c.Enabled {
return nil
}
srv, err := graphite.NewService(c)
if err != nil {
return err
}
srv.PointsWriter = s.PointsWriter
srv.MetaClient = s.MetaClient
srv.Monitor = s.Monitor
s.Services = append(s.Services, srv)
return nil
}
func (s *Server) appendPrecreatorService(c precreator.Config) error {
if !c.Enabled {
return nil
}
srv, err := precreator.NewService(c)
if err != nil {
return err
}
srv.MetaClient = s.MetaClient
s.Services = append(s.Services, srv)
return nil
}
func (s *Server) appendUDPService(c udp.Config) {
if !c.Enabled {
return
}
srv := udp.NewService(c)
srv.PointsWriter = s.PointsWriter
srv.MetaClient = s.MetaClient
s.Services = append(s.Services, srv)
}
func (s *Server) appendContinuousQueryService(c continuous_querier.Config) {
if !c.Enabled {
return
}
srv := continuous_querier.NewService(c)
srv.MetaClient = s.MetaClient
srv.QueryExecutor = s.QueryExecutor
s.Services = append(s.Services, srv)
}
// Err returns an error channel that multiplexes all out of band errors received from all services.
func (s *Server) Err() <-chan error { return s.err }
// Open opens the meta and data store and all services.
func (s *Server) Open() error {
// Start profiling, if set.
startProfile(s.CPUProfile, s.MemProfile)
// Open shared TCP connection.
ln, err := net.Listen("tcp", s.BindAddress)
if err != nil {
return fmt.Errorf("listen: %s", err)
}
s.Listener = ln
// Multiplex listener.
mux := tcp.NewMux()
go mux.Serve(ln)
// Append services.
s.appendMonitorService()
s.appendPrecreatorService(s.config.Precreator)
s.appendSnapshotterService()
s.appendAdminService(s.config.Admin)
s.appendContinuousQueryService(s.config.ContinuousQuery)
s.appendHTTPDService(s.config.HTTPD)
s.appendRetentionPolicyService(s.config.Retention)
for _, i := range s.config.GraphiteInputs {
if err := s.appendGraphiteService(i); err != nil {
return err
}
}
for _, i := range s.config.CollectdInputs {
s.appendCollectdService(i)
}
for _, i := range s.config.OpenTSDBInputs {
if err := s.appendOpenTSDBService(i); err != nil {
return err
}
}
for _, i := range s.config.UDPInputs {
s.appendUDPService(i)
}
s.Subscriber.MetaClient = s.MetaClient
s.Subscriber.MetaClient = s.MetaClient
s.PointsWriter.MetaClient = s.MetaClient
s.Monitor.MetaClient = s.MetaClient
s.SnapshotterService.Listener = mux.Listen(snapshotter.MuxHeader)
// Configure logging for all services and clients.
w := s.logOutput
if s.config.Meta.LoggingEnabled {
s.MetaClient.SetLogOutput(w)
}
s.TSDBStore.SetLogOutput(w)
if s.config.Data.QueryLogEnabled {
s.QueryExecutor.SetLogOutput(w)
}
s.PointsWriter.SetLogOutput(w)
s.Subscriber.SetLogOutput(w)
for _, svc := range s.Services {
svc.SetLogOutput(w)
}
s.SnapshotterService.SetLogOutput(w)
s.Monitor.SetLogOutput(w)
// Open TSDB store.
if err := s.TSDBStore.Open(); err != nil {
return fmt.Errorf("open tsdb store: %s", err)
}
// Open the subcriber service
if err := s.Subscriber.Open(); err != nil {
return fmt.Errorf("open subscriber: %s", err)
}
// Open the points writer service
if err := s.PointsWriter.Open(); err != nil {
return fmt.Errorf("open points writer: %s", err)
}
for _, service := range s.Services {
if err := service.Open(); err != nil {
return fmt.Errorf("open service: %s", err)
}
}
// Start the reporting service, if not disabled.
if s.reportingEnabled {
go s.startServerReporting()
}
return nil
}
// Close shuts down the meta and data stores and all services.
func (s *Server) Close() error {
stopProfile()
// Close the listener first to stop any new connections
if s.Listener != nil {
s.Listener.Close()
}
// Close services to allow any inflight requests to complete
// and prevent new requests from being accepted.
for _, service := range s.Services {
service.Close()
}
if s.PointsWriter != nil {
s.PointsWriter.Close()
}
if s.QueryExecutor != nil {
s.QueryExecutor.Close()
}
// Close the TSDBStore, no more reads or writes at this point
if s.TSDBStore != nil {
s.TSDBStore.Close()
}
if s.Subscriber != nil {
s.Subscriber.Close()
}
if s.MetaClient != nil {
s.MetaClient.Close()
}
close(s.closing)
return nil
}
// startServerReporting starts periodic server reporting.
func (s *Server) startServerReporting() {
s.reportServer()
ticker := time.NewTicker(24 * time.Hour)
defer ticker.Stop()
for {
select {
case <-s.closing:
return
case <-ticker.C:
s.reportServer()
}
}
}
// reportServer reports usage statistics about the system.
func (s *Server) reportServer() {
dis := s.MetaClient.Databases()
numDatabases := len(dis)
numMeasurements := 0
numSeries := 0
// Only needed in the case of a data node
if s.TSDBStore != nil {
for _, di := range dis {
d := s.TSDBStore.DatabaseIndex(di.Name)
if d == nil {
// No data in this store for this database.
continue
}
m, s := d.MeasurementSeriesCounts()
numMeasurements += m
numSeries += s
}
}
clusterID := s.MetaClient.ClusterID()
cl := client.New("")
usage := client.Usage{
Product: "influxdb",
Data: []client.UsageData{
{
Values: client.Values{
"os": runtime.GOOS,
"arch": runtime.GOARCH,
"version": s.buildInfo.Version,
"cluster_id": fmt.Sprintf("%v", clusterID),
"num_series": numSeries,
"num_measurements": numMeasurements,
"num_databases": numDatabases,
"uptime": time.Since(startTime).Seconds(),
},
},
},
}
s.Logger.Printf("Sending usage statistics to usage.influxdata.com")
go cl.Save(usage)
}
// monitorErrorChan reads an error channel and resends it through the server.
func (s *Server) monitorErrorChan(ch <-chan error) {
for {
select {
case err, ok := <-ch:
if !ok {
return
}
s.err <- err
case <-s.closing:
return
}
}
}
// Service represents a service attached to the server.
type Service interface {
SetLogOutput(w io.Writer)
Open() error
Close() error
}
// prof stores the file locations of active profiles.
var prof struct {
cpu *os.File
mem *os.File
}
// StartProfile initializes the cpu and memory profile, if specified.
func startProfile(cpuprofile, memprofile string) {
if cpuprofile != "" {
f, err := os.Create(cpuprofile)
if err != nil {
log.Fatalf("cpuprofile: %v", err)
}
log.Printf("writing CPU profile to: %s\n", cpuprofile)
prof.cpu = f
pprof.StartCPUProfile(prof.cpu)
}
if memprofile != "" {
f, err := os.Create(memprofile)
if err != nil {
log.Fatalf("memprofile: %v", err)
}
log.Printf("writing mem profile to: %s\n", memprofile)
prof.mem = f
runtime.MemProfileRate = 4096
}
}
// StopProfile closes the cpu and memory profiles if they are running.
func stopProfile() {
if prof.cpu != nil {
pprof.StopCPUProfile()
prof.cpu.Close()
log.Println("CPU profile stopped")
}
if prof.mem != nil {
pprof.Lookup("heap").WriteTo(prof.mem, 0)
prof.mem.Close()
log.Println("mem profile stopped")
}
}
type tcpaddr struct{ host string }
func (a *tcpaddr) Network() string { return "tcp" }
func (a *tcpaddr) String() string { return a.host }
// monitorPointsWriter is a wrapper around `coordinator.PointsWriter` that helps
// to prevent a circular dependency between the `cluster` and `monitor` packages.
type monitorPointsWriter coordinator.PointsWriter
func (pw *monitorPointsWriter) WritePoints(database, retentionPolicy string, points models.Points) error {
return (*coordinator.PointsWriter)(pw).WritePoints(database, retentionPolicy, models.ConsistencyLevelAny, points)
}
func raftDBExists(dir string) error {
// 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(dir, "raft.db")
if _, err := os.Stat(raftFile); err == nil {
return 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)
}
return nil
}
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