forked from influxdata/kapacitor
/
server.go
592 lines (502 loc) · 14.9 KB
/
server.go
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package run
import (
"errors"
"fmt"
"io/ioutil"
"log"
"os"
"path/filepath"
"runtime"
"runtime/pprof"
"strings"
"time"
"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/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/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/talk"
"github.com/influxdata/kapacitor/services/task_store"
"github.com/influxdata/kapacitor/services/udf"
"github.com/influxdata/kapacitor/services/udp"
"github.com/influxdata/kapacitor/services/victorops"
"github.com/influxdata/kapacitor/wlog"
"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 {
buildInfo BuildInfo
dataDir string
hostname string
err chan error
TaskMaster *kapacitor.TaskMaster
LogService logging.Interface
HTTPDService *httpd.Service
TaskStore *task_store.Service
ReplayService *replay.Service
InfluxDBService *influxdb.Service
MetaClient *metaclient
QueryExecutor *queryexecutor
Services []Service
ClusterID string
ServerID string
// Profiling
CPUProfile string
MemProfile string
Logger *log.Logger
}
// NewServer returns a new instance of Server built from a config.
func NewServer(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{
buildInfo: *buildInfo,
dataDir: c.DataDir,
hostname: c.Hostname,
err: make(chan error),
LogService: logService,
MetaClient: &metaclient{},
QueryExecutor: &queryexecutor{},
Logger: l,
}
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.TaskMaster = kapacitor.NewTaskMaster(logService)
if err := s.TaskMaster.Open(); err != nil {
return nil, err
}
// Append Kapacitor services.
s.appendUDFService(c.UDF)
s.appendDeadmanService(c.Deadman)
s.appendSMTPService(c.SMTP)
s.initHTTPDService(c.HTTP)
s.appendInfluxDBService(c.InfluxDB, c.defaultInfluxDB, c.Hostname)
s.appendTaskStoreService(c.Task)
s.appendReplayStoreService(c.Replay)
s.appendOpsGenieService(c.OpsGenie)
s.appendVictorOpsService(c.VictorOps)
s.appendPagerDutyService(c.PagerDuty)
s.appendHipChatService(c.HipChat)
s.appendAlertaService(c.Alerta)
s.appendSlackService(c.Slack)
s.appendSensuService(c.Sensu)
s.appendTalkService(c.Talk)
// Append InfluxDB services
s.appendCollectdService(c.Collectd)
if err := s.appendOpenTSDBService(c.OpenTSDB); err != nil {
return nil, err
}
for _, g := range c.UDPs {
s.appendUDPService(g)
}
for _, g := range c.Graphites {
if err := s.appendGraphiteService(g); err != nil {
return nil, err
}
}
// append StatsService and ReportingService last so all stats are ready
// to be reported
s.appendStatsService(c.Stats)
s.appendReportingService(c.Reporting)
// Append HTTPD Service last
s.appendHTTPDService()
return s, nil
}
func (s *Server) appendSMTPService(c smtp.Config) {
if c.Enabled {
l := s.LogService.NewLogger("[smtp] ", log.LstdFlags)
srv := smtp.NewService(c, l)
s.TaskMaster.SMTPService = srv
s.Services = append(s.Services, srv)
}
}
func (s *Server) appendInfluxDBService(c []influxdb.Config, defaultInfluxDB int, hostname string) {
if len(c) > 0 {
l := s.LogService.NewLogger("[influxdb] ", log.LstdFlags)
srv := influxdb.NewService(c, defaultInfluxDB, hostname, l)
srv.PointsWriter = s.TaskMaster
srv.LogService = s.LogService
s.InfluxDBService = srv
s.TaskMaster.InfluxDBService = srv
s.Services = append(s.Services, srv)
}
}
func (s *Server) initHTTPDService(c httpd.Config) {
l := s.LogService.NewLogger("[httpd] ", log.LstdFlags)
srv := httpd.NewService(c, l)
srv.Handler.MetaClient = s.MetaClient
srv.Handler.PointsWriter = s.TaskMaster
srv.Handler.Version = s.buildInfo.Version
s.HTTPDService = srv
s.TaskMaster.HTTPDService = srv
}
func (s *Server) appendHTTPDService() {
s.Services = append(s.Services, s.HTTPDService)
}
func (s *Server) appendTaskStoreService(c task_store.Config) {
l := s.LogService.NewLogger("[task_store] ", log.LstdFlags)
srv := task_store.NewService(c, l)
srv.HTTPDService = s.HTTPDService
srv.TaskMaster = s.TaskMaster
s.TaskStore = srv
s.TaskMaster.TaskStore = srv
s.Services = append(s.Services, srv)
}
func (s *Server) appendReplayStoreService(c replay.Config) {
l := s.LogService.NewLogger("[replay] ", log.LstdFlags)
srv := replay.NewService(c, l)
srv.TaskStore = s.TaskStore
srv.HTTPDService = s.HTTPDService
srv.InfluxDBService = s.InfluxDBService
srv.TaskMaster = s.TaskMaster
s.ReplayService = srv
s.Services = append(s.Services, srv)
}
func (s *Server) appendDeadmanService(c deadman.Config) {
l := s.LogService.NewLogger("[deadman] ", log.LstdFlags)
srv := deadman.NewService(c, l)
s.TaskMaster.DeadmanService = srv
s.Services = append(s.Services, srv)
}
func (s *Server) appendUDFService(c udf.Config) {
l := s.LogService.NewLogger("[udf] ", log.LstdFlags)
srv := udf.NewService(c, l)
s.TaskMaster.UDFService = srv
s.Services = append(s.Services, srv)
}
func (s *Server) appendOpsGenieService(c opsgenie.Config) {
if c.Enabled {
l := s.LogService.NewLogger("[opsgenie] ", log.LstdFlags)
srv := opsgenie.NewService(c, l)
s.TaskMaster.OpsGenieService = srv
s.Services = append(s.Services, srv)
}
}
func (s *Server) appendVictorOpsService(c victorops.Config) {
if c.Enabled {
l := s.LogService.NewLogger("[victorops] ", log.LstdFlags)
srv := victorops.NewService(c, l)
s.TaskMaster.VictorOpsService = srv
s.Services = append(s.Services, srv)
}
}
func (s *Server) appendPagerDutyService(c pagerduty.Config) {
if c.Enabled {
l := s.LogService.NewLogger("[pagerduty] ", log.LstdFlags)
srv := pagerduty.NewService(c, l)
srv.HTTPDService = s.HTTPDService
s.TaskMaster.PagerDutyService = srv
s.Services = append(s.Services, srv)
}
}
func (s *Server) appendSensuService(c sensu.Config) {
if c.Enabled {
l := s.LogService.NewLogger("[sensu] ", log.LstdFlags)
srv := sensu.NewService(c, l)
s.TaskMaster.SensuService = srv
s.Services = append(s.Services, srv)
}
}
func (s *Server) appendSlackService(c slack.Config) {
if c.Enabled {
l := s.LogService.NewLogger("[slack] ", log.LstdFlags)
srv := slack.NewService(c, l)
s.TaskMaster.SlackService = srv
s.Services = append(s.Services, srv)
}
}
func (s *Server) appendHipChatService(c hipchat.Config) {
if c.Enabled {
l := s.LogService.NewLogger("[hipchat] ", log.LstdFlags)
srv := hipchat.NewService(c, l)
s.TaskMaster.HipChatService = srv
s.Services = append(s.Services, srv)
}
}
func (s *Server) appendAlertaService(c alerta.Config) {
if c.Enabled {
l := s.LogService.NewLogger("[alerta] ", log.LstdFlags)
srv := alerta.NewService(c, l)
s.TaskMaster.AlertaService = srv
s.Services = append(s.Services, srv)
}
}
func (s *Server) appendCollectdService(c collectd.Config) {
if !c.Enabled {
return
}
l := s.LogService.NewStaticLevelLogger("[collectd] ", log.LstdFlags, wlog.INFO)
srv := collectd.NewService(c)
srv.SetLogger(l)
srv.MetaClient = s.MetaClient
srv.PointsWriter = s.TaskMaster
s.Services = append(s.Services, srv)
}
func (s *Server) appendOpenTSDBService(c opentsdb.Config) error {
if !c.Enabled {
return nil
}
l := s.LogService.NewStaticLevelLogger("[opentsdb] ", log.LstdFlags, wlog.INFO)
srv, err := opentsdb.NewService(c)
if err != nil {
return err
}
srv.SetLogger(l)
srv.PointsWriter = s.TaskMaster
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
}
l := s.LogService.NewStaticLevelLogger("[graphite] ", log.LstdFlags, wlog.INFO)
srv, err := graphite.NewService(c)
if err != nil {
return err
}
srv.SetLogger(l)
srv.PointsWriter = s.TaskMaster
srv.MetaClient = s.MetaClient
s.Services = append(s.Services, srv)
return nil
}
func (s *Server) appendUDPService(c udp.Config) {
if !c.Enabled {
return
}
l := s.LogService.NewLogger("[udp] ", log.LstdFlags)
srv := udp.NewService(c, l)
srv.PointsWriter = s.TaskMaster
s.Services = append(s.Services, srv)
}
func (s *Server) appendStatsService(c stats.Config) {
if c.Enabled {
l := s.LogService.NewLogger("[stats] ", log.LstdFlags)
srv := stats.NewService(c, l)
srv.TaskMaster = s.TaskMaster
s.TaskMaster.TimingService = srv
s.Services = append(s.Services, srv)
}
}
func (s *Server) appendReportingService(c reporting.Config) {
if c.Enabled {
l := s.LogService.NewLogger("[reporting] ", log.LstdFlags)
srv := reporting.NewService(c, l)
s.Services = append(s.Services, srv)
}
}
func (s *Server) appendTalkService(c talk.Config) {
if c.Enabled {
l := s.LogService.NewLogger("[talk] ", log.LstdFlags)
srv := talk.NewService(c, l)
s.TaskMaster.TalkService = srv
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 all the services.
func (s *Server) Open() error {
if err := func() 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
}(); err != nil {
s.Close()
return err
}
go func() {
// Watch if something dies
var err error
select {
case err = <-s.HTTPDService.Err():
}
s.err <- err
}()
return nil
}
// 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 metaclient struct{}
func (m *metaclient) WaitForLeader(d time.Duration) error {
return nil
}
func (m *metaclient) CreateDatabase(name string) (*meta.DatabaseInfo, error) {
return nil, nil
}
func (m *metaclient) Database(name string) (*meta.DatabaseInfo, error) {
return &meta.DatabaseInfo{
Name: name,
}, nil
}
func (m *metaclient) Authenticate(username, password string) (ui *meta.UserInfo, err error) {
return nil, errors.New("not authenticated")
}
func (m *metaclient) Users() ([]meta.UserInfo, error) {
return nil, errors.New("no user")
}
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")
}