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server.go
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// Provides a server type for starting and configuring a Kapacitor server.
package server
import (
"fmt"
"io/ioutil"
"log"
"os"
"path/filepath"
"runtime"
"runtime/pprof"
"strings"
"github.com/influxdata/influxdb/influxql"
"github.com/influxdata/influxdb/services/collectd"
"github.com/influxdata/influxdb/services/graphite"
"github.com/influxdata/influxdb/services/meta"
"github.com/influxdata/influxdb/services/opentsdb"
"github.com/influxdata/kapacitor"
"github.com/influxdata/kapacitor/auth"
iclient "github.com/influxdata/kapacitor/influxdb"
"github.com/influxdata/kapacitor/services/alerta"
"github.com/influxdata/kapacitor/services/deadman"
"github.com/influxdata/kapacitor/services/hipchat"
"github.com/influxdata/kapacitor/services/httpd"
"github.com/influxdata/kapacitor/services/influxdb"
"github.com/influxdata/kapacitor/services/logging"
"github.com/influxdata/kapacitor/services/noauth"
"github.com/influxdata/kapacitor/services/opsgenie"
"github.com/influxdata/kapacitor/services/pagerduty"
"github.com/influxdata/kapacitor/services/replay"
"github.com/influxdata/kapacitor/services/reporting"
"github.com/influxdata/kapacitor/services/sensu"
"github.com/influxdata/kapacitor/services/slack"
"github.com/influxdata/kapacitor/services/smtp"
"github.com/influxdata/kapacitor/services/stats"
"github.com/influxdata/kapacitor/services/storage"
"github.com/influxdata/kapacitor/services/talk"
"github.com/influxdata/kapacitor/services/task_store"
"github.com/influxdata/kapacitor/services/telegram"
"github.com/influxdata/kapacitor/services/udf"
"github.com/influxdata/kapacitor/services/udp"
"github.com/influxdata/kapacitor/services/victorops"
"github.com/pkg/errors"
"github.com/twinj/uuid"
)
const clusterIDFilename = "cluster.id"
const serverIDFilename = "server.id"
// BuildInfo represents the build details for the server code.
type BuildInfo struct {
Version string
Commit string
Branch 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 {
dataDir string
hostname string
config *Config
err chan error
TaskMaster *kapacitor.TaskMaster
TaskMasterLookup *kapacitor.TaskMasterLookup
AuthService auth.Interface
HTTPDService *httpd.Service
StorageService *storage.Service
TaskStore *task_store.Service
ReplayService *replay.Service
InfluxDBService *influxdb.Service
MetaClient *kapacitor.NoopMetaClient
QueryExecutor *Queryexecutor
// List of services in startup order
Services []Service
// Map of service name to index in Services list
ServicesByName map[string]int
BuildInfo BuildInfo
ClusterID string
ServerID string
// Profiling
CPUProfile string
MemProfile string
LogService logging.Interface
Logger *log.Logger
}
// New returns a new instance of Server built from a config.
func New(c *Config, buildInfo BuildInfo, logService logging.Interface) (*Server, error) {
err := c.Validate()
if err != nil {
return nil, fmt.Errorf("%s. To generate a valid configuration file run `kapacitord config > kapacitor.generated.conf`.", err)
}
l := logService.NewLogger("[srv] ", log.LstdFlags)
s := &Server{
config: c,
BuildInfo: buildInfo,
dataDir: c.DataDir,
hostname: c.Hostname,
err: make(chan error),
LogService: logService,
MetaClient: &kapacitor.NoopMetaClient{},
QueryExecutor: &Queryexecutor{},
Logger: l,
ServicesByName: make(map[string]int),
}
s.Logger.Println("I! Kapacitor hostname:", s.hostname)
// Setup IDs
err = s.setupIDs()
if err != nil {
return nil, err
}
// Set published vars
kapacitor.ClusterIDVar.Set(s.ClusterID)
kapacitor.ServerIDVar.Set(s.ServerID)
kapacitor.HostVar.Set(s.hostname)
kapacitor.ProductVar.Set(kapacitor.Product)
kapacitor.VersionVar.Set(s.BuildInfo.Version)
s.Logger.Printf("I! ClusterID: %s ServerID: %s", s.ClusterID, s.ServerID)
// Start Task Master
s.TaskMasterLookup = kapacitor.NewTaskMasterLookup()
s.TaskMaster = kapacitor.NewTaskMaster(kapacitor.MainTaskMaster, logService)
s.TaskMasterLookup.Set(s.TaskMaster)
if err := s.TaskMaster.Open(); err != nil {
return nil, err
}
// Append Kapacitor services.
s.appendUDFService()
s.appendDeadmanService()
s.appendSMTPService()
s.InitHTTPDService()
s.appendStorageService()
s.appendAuthService()
if err := s.appendInfluxDBService(); err != nil {
return nil, errors.Wrap(err, "influxdb service")
}
s.appendTaskStoreService()
s.appendReplayService()
// Append Alert integration services
s.appendOpsGenieService()
s.appendVictorOpsService()
s.appendPagerDutyService()
s.appendTelegramService()
s.appendHipChatService()
s.appendAlertaService()
s.appendSlackService()
s.appendSensuService()
s.appendTalkService()
// Append InfluxDB input services
s.appendCollectdService()
s.appendUDPServices()
if err := s.appendOpenTSDBService(); err != nil {
return nil, errors.Wrap(err, "opentsdb service")
}
if err := s.appendGraphiteServices(); err != nil {
return nil, errors.Wrap(err, "graphite service")
}
// Append StatsService and ReportingService after other services so all stats are ready
// to be reported
s.appendStatsService()
s.appendReportingService()
// Append HTTPD Service last so that the API is not listening till everything else succeeded.
s.appendHTTPDService()
return s, nil
}
func (s *Server) AppendService(name string, srv Service) {
i := len(s.Services)
s.Services = append(s.Services, srv)
s.ServicesByName[name] = i
}
func (s *Server) appendStorageService() {
l := s.LogService.NewLogger("[storage] ", log.LstdFlags)
srv := storage.NewService(s.config.Storage, l)
s.StorageService = srv
s.AppendService("storage", srv)
}
func (s *Server) appendSMTPService() {
c := s.config.SMTP
if c.Enabled {
l := s.LogService.NewLogger("[smtp] ", log.LstdFlags)
srv := smtp.NewService(c, l)
s.TaskMaster.SMTPService = srv
s.AppendService("smtp", srv)
}
}
func (s *Server) appendInfluxDBService() error {
c := s.config.InfluxDB
if len(c) > 0 {
l := s.LogService.NewLogger("[influxdb] ", log.LstdFlags)
httpPort, err := s.config.HTTP.Port()
if err != nil {
return errors.Wrap(err, "failed to get http port")
}
srv := influxdb.NewService(c, s.config.defaultInfluxDB, httpPort, s.config.Hostname, s.config.HTTP.AuthEnabled, l)
srv.HTTPDService = s.HTTPDService
srv.PointsWriter = s.TaskMaster
srv.LogService = s.LogService
srv.AuthService = s.AuthService
srv.ClientCreator = iclient.ClientCreator{}
s.InfluxDBService = srv
s.TaskMaster.InfluxDBService = srv
s.AppendService("influxdb", srv)
}
return nil
}
func (s *Server) InitHTTPDService() {
l := s.LogService.NewLogger("[httpd] ", log.LstdFlags)
srv := httpd.NewService(s.config.HTTP, s.hostname, l, s.LogService)
srv.Handler.PointsWriter = s.TaskMaster
srv.Handler.Version = s.BuildInfo.Version
s.HTTPDService = srv
s.TaskMaster.HTTPDService = srv
}
func (s *Server) appendHTTPDService() {
s.AppendService("httpd", s.HTTPDService)
}
func (s *Server) appendTaskStoreService() {
l := s.LogService.NewLogger("[task_store] ", log.LstdFlags)
srv := task_store.NewService(s.config.Task, l)
srv.StorageService = s.StorageService
srv.HTTPDService = s.HTTPDService
srv.TaskMasterLookup = s.TaskMasterLookup
s.TaskStore = srv
s.TaskMaster.TaskStore = srv
s.AppendService("task_store", srv)
}
func (s *Server) appendReplayService() {
l := s.LogService.NewLogger("[replay] ", log.LstdFlags)
srv := replay.NewService(s.config.Replay, l)
srv.StorageService = s.StorageService
srv.TaskStore = s.TaskStore
srv.HTTPDService = s.HTTPDService
srv.InfluxDBService = s.InfluxDBService
srv.TaskMaster = s.TaskMaster
srv.TaskMasterLookup = s.TaskMasterLookup
s.ReplayService = srv
s.AppendService("replay", srv)
}
func (s *Server) appendDeadmanService() {
l := s.LogService.NewLogger("[deadman] ", log.LstdFlags)
srv := deadman.NewService(s.config.Deadman, l)
s.TaskMaster.DeadmanService = srv
s.AppendService("deadman", srv)
}
func (s *Server) appendUDFService() {
l := s.LogService.NewLogger("[udf] ", log.LstdFlags)
srv := udf.NewService(s.config.UDF, l)
s.TaskMaster.UDFService = srv
s.AppendService("udf", srv)
}
func (s *Server) appendAuthService() {
l := s.LogService.NewLogger("[noauth] ", log.LstdFlags)
srv := noauth.NewService(l)
s.AuthService = srv
s.HTTPDService.Handler.AuthService = srv
s.AppendService("auth", srv)
}
func (s *Server) appendOpsGenieService() {
c := s.config.OpsGenie
if c.Enabled {
l := s.LogService.NewLogger("[opsgenie] ", log.LstdFlags)
srv := opsgenie.NewService(c, l)
s.TaskMaster.OpsGenieService = srv
s.AppendService("opsgenie", srv)
}
}
func (s *Server) appendVictorOpsService() {
c := s.config.VictorOps
if c.Enabled {
l := s.LogService.NewLogger("[victorops] ", log.LstdFlags)
srv := victorops.NewService(c, l)
s.TaskMaster.VictorOpsService = srv
s.AppendService("victorops", srv)
}
}
func (s *Server) appendPagerDutyService() {
c := s.config.PagerDuty
if c.Enabled {
l := s.LogService.NewLogger("[pagerduty] ", log.LstdFlags)
srv := pagerduty.NewService(c, l)
srv.HTTPDService = s.HTTPDService
s.TaskMaster.PagerDutyService = srv
s.AppendService("pagerduty", srv)
}
}
func (s *Server) appendSensuService() {
c := s.config.Sensu
if c.Enabled {
l := s.LogService.NewLogger("[sensu] ", log.LstdFlags)
srv := sensu.NewService(c, l)
s.TaskMaster.SensuService = srv
s.AppendService("sensu", srv)
}
}
func (s *Server) appendSlackService() {
c := s.config.Slack
if c.Enabled {
l := s.LogService.NewLogger("[slack] ", log.LstdFlags)
srv := slack.NewService(c, l)
s.TaskMaster.SlackService = srv
s.AppendService("slack", srv)
}
}
func (s *Server) appendTelegramService() {
c := s.config.Telegram
if c.Enabled {
l := s.LogService.NewLogger("[telegram] ", log.LstdFlags)
srv := telegram.NewService(c, l)
s.TaskMaster.TelegramService = srv
s.AppendService("telegram", srv)
}
}
func (s *Server) appendHipChatService() {
c := s.config.HipChat
if c.Enabled {
l := s.LogService.NewLogger("[hipchat] ", log.LstdFlags)
srv := hipchat.NewService(c, l)
s.TaskMaster.HipChatService = srv
s.AppendService("hipchat", srv)
}
}
func (s *Server) appendAlertaService() {
c := s.config.Alerta
if c.Enabled {
l := s.LogService.NewLogger("[alerta] ", log.LstdFlags)
srv := alerta.NewService(c, l)
s.TaskMaster.AlertaService = srv
s.AppendService("alerta", srv)
}
}
func (s *Server) appendTalkService() {
c := s.config.Talk
if c.Enabled {
l := s.LogService.NewLogger("[talk] ", log.LstdFlags)
srv := talk.NewService(c, l)
s.TaskMaster.TalkService = srv
s.AppendService("talk", srv)
}
}
func (s *Server) appendCollectdService() {
c := s.config.Collectd
if !c.Enabled {
return
}
srv := collectd.NewService(c)
w := s.LogService.NewStaticLevelWriter(logging.INFO)
srv.SetLogOutput(w)
srv.MetaClient = s.MetaClient
srv.PointsWriter = s.TaskMaster
s.AppendService("collectd", srv)
}
func (s *Server) appendOpenTSDBService() error {
c := s.config.OpenTSDB
if !c.Enabled {
return nil
}
srv, err := opentsdb.NewService(c)
if err != nil {
return err
}
w := s.LogService.NewStaticLevelWriter(logging.INFO)
srv.SetLogOutput(w)
srv.PointsWriter = s.TaskMaster
srv.MetaClient = s.MetaClient
s.AppendService("opentsdb", srv)
return nil
}
func (s *Server) appendGraphiteServices() error {
for i, c := range s.config.Graphites {
if !c.Enabled {
continue
}
srv, err := graphite.NewService(c)
if err != nil {
return errors.Wrap(err, "creating new graphite service")
}
w := s.LogService.NewStaticLevelWriter(logging.INFO)
srv.SetLogOutput(w)
srv.PointsWriter = s.TaskMaster
srv.MetaClient = s.MetaClient
s.AppendService(fmt.Sprintf("graphite%d", i), srv)
}
return nil
}
func (s *Server) appendUDPServices() {
for i, c := range s.config.UDPs {
if !c.Enabled {
continue
}
l := s.LogService.NewLogger("[udp] ", log.LstdFlags)
srv := udp.NewService(c, l)
srv.PointsWriter = s.TaskMaster
s.AppendService(fmt.Sprintf("udp%d", i), srv)
}
}
func (s *Server) appendStatsService() {
c := s.config.Stats
if c.Enabled {
l := s.LogService.NewLogger("[stats] ", log.LstdFlags)
srv := stats.NewService(c, l)
srv.TaskMaster = s.TaskMaster
s.TaskMaster.TimingService = srv
s.AppendService("stats", srv)
}
}
func (s *Server) appendReportingService() {
c := s.config.Reporting
if c.Enabled {
l := s.LogService.NewLogger("[reporting] ", log.LstdFlags)
srv := reporting.NewService(c, l)
s.AppendService("reporting", 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 all the services.
func (s *Server) Open() error {
if err := s.startServices(); err != nil {
s.Close()
return err
}
go s.watchServices()
return nil
}
func (s *Server) startServices() error {
// Start profiling, if set.
s.startProfile(s.CPUProfile, s.MemProfile)
for _, service := range s.Services {
s.Logger.Printf("D! opening service: %T", service)
if err := service.Open(); err != nil {
return fmt.Errorf("open service %T: %s", service, err)
}
s.Logger.Printf("D! opened service: %T", service)
}
return nil
}
// Watch if something dies
func (s *Server) watchServices() {
var err error
select {
case err = <-s.HTTPDService.Err():
}
s.err <- err
}
// Close shuts down the meta and data stores and all services.
func (s *Server) Close() error {
s.stopProfile()
// First stop all tasks.
s.TaskMaster.StopTasks()
// Close services now that all tasks are stopped.
for _, service := range s.Services {
s.Logger.Printf("D! closing service: %T", service)
err := service.Close()
if err != nil {
s.Logger.Printf("E! error closing service %T: %v", service, err)
}
s.Logger.Printf("D! closed service: %T", service)
}
// Finally close the task master
return s.TaskMaster.Close()
}
func (s *Server) setupIDs() error {
clusterIDPath := filepath.Join(s.dataDir, clusterIDFilename)
clusterID, err := s.readID(clusterIDPath)
if err != nil && !os.IsNotExist(err) {
return err
}
if clusterID == "" {
clusterID = uuid.NewV4().String()
s.writeID(clusterIDPath, clusterID)
}
s.ClusterID = clusterID
serverIDPath := filepath.Join(s.dataDir, serverIDFilename)
serverID, err := s.readID(serverIDPath)
if err != nil && !os.IsNotExist(err) {
return err
}
if serverID == "" {
serverID = uuid.NewV4().String()
s.writeID(serverIDPath, serverID)
}
s.ServerID = serverID
return nil
}
func (s *Server) readID(file string) (string, error) {
f, err := os.Open(file)
if err != nil {
return "", err
}
defer f.Close()
b, err := ioutil.ReadAll(f)
if err != nil {
return "", err
}
return strings.TrimSpace(string(b)), nil
}
func (s *Server) writeID(file, id string) error {
f, err := os.Create(file)
if err != nil {
return err
}
defer f.Close()
_, err = f.Write([]byte(id))
if err != nil {
return err
}
return nil
}
// Service represents a service attached to the server.
type Service interface {
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 (s *Server) startProfile(cpuprofile, memprofile string) {
if cpuprofile != "" {
f, err := os.Create(cpuprofile)
if err != nil {
s.Logger.Fatalf("E! cpuprofile: %v", err)
}
s.Logger.Printf("I! writing CPU profile to: %s\n", cpuprofile)
prof.cpu = f
pprof.StartCPUProfile(prof.cpu)
}
if memprofile != "" {
f, err := os.Create(memprofile)
if err != nil {
s.Logger.Fatalf("E! memprofile: %v", err)
}
s.Logger.Printf("I! 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 (s *Server) stopProfile() {
if prof.cpu != nil {
pprof.StopCPUProfile()
prof.cpu.Close()
s.Logger.Println("I! CPU profile stopped")
}
if prof.mem != nil {
pprof.Lookup("heap").WriteTo(prof.mem, 0)
prof.mem.Close()
s.Logger.Println("I! mem profile stopped")
}
}
type tcpaddr struct{ host string }
func (a *tcpaddr) Network() string { return "tcp" }
func (a *tcpaddr) String() string { return a.host }
type Queryexecutor struct{}
func (qe *Queryexecutor) Authorize(u *meta.UserInfo, q *influxql.Query, db string) error {
return nil
}
func (qe *Queryexecutor) ExecuteQuery(q *influxql.Query, db string, chunkSize int) (<-chan *influxql.Result, error) {
return nil, errors.New("cannot execute queries against Kapacitor")
}