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run.go
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package main
import (
"flag"
"fmt"
"io/ioutil"
"log"
"net"
"net/http"
"net/url"
"os"
"path/filepath"
"runtime"
"strconv"
"strings"
"time"
"github.com/influxdb/influxdb"
"github.com/influxdb/influxdb/admin"
"github.com/influxdb/influxdb/collectd"
"github.com/influxdb/influxdb/graphite"
"github.com/influxdb/influxdb/httpd"
"github.com/influxdb/influxdb/messaging"
"github.com/influxdb/influxdb/opentsdb"
"github.com/influxdb/influxdb/raft"
"github.com/influxdb/influxdb/udp"
)
type RunCommand struct {
// The logger passed to the ticker during execution.
Logger *log.Logger
logWriter *os.File
config *Config
hostname string
node *Node
}
func NewRunCommand() *RunCommand {
return &RunCommand{
node: &Node{},
}
}
type Node struct {
broker *influxdb.Broker
dataNode *influxdb.Server
raftLog *raft.Log
}
func (s *Node) Close() {
if s.broker != nil {
if err := s.broker.Close(); err != nil {
log.Fatalf("error closing broker: %s", err)
}
}
if s.raftLog != nil {
if err := s.raftLog.Close(); err != nil {
log.Fatalf("error closing raft log: %s", err)
}
}
if s.dataNode != nil {
if err := s.dataNode.Close(); err != nil {
log.Fatalf("error data broker: %s", err)
}
}
}
func (cmd *RunCommand) Run(args ...string) error {
// Set up logger.
cmd.Logger = log.New(os.Stderr, "", log.LstdFlags)
// Parse command flags.
fs := flag.NewFlagSet("", flag.ExitOnError)
var configPath, pidfile, hostname, join, cpuprofile, memprofile string
fs.StringVar(&configPath, "config", "", "")
fs.StringVar(&pidfile, "pidfile", "", "")
fs.StringVar(&hostname, "hostname", "", "")
fs.StringVar(&join, "join", "", "")
fs.StringVar(&cpuprofile, "cpuprofile", "", "")
fs.StringVar(&memprofile, "memprofile", "", "")
fs.Usage = printRunUsage
fs.Parse(args)
cmd.hostname = hostname
// Start profiling, if set.
startProfiling(cpuprofile, memprofile)
defer stopProfiling()
// Print sweet InfluxDB logo and write the process id to file.
fmt.Print(logo)
writePIDFile(pidfile)
// Set parallelism.
runtime.GOMAXPROCS(runtime.NumCPU())
log.Printf("GOMAXPROCS set to %d", runtime.GOMAXPROCS(0))
var err error
// Parse configuration file from disk.
if configPath != "" {
cmd.config, err = parseConfig(configPath, hostname)
} else {
cmd.config, err = NewTestConfig()
}
if err != nil {
cmd.Logger.Fatal(err)
} else if configPath == "" {
cmd.Logger.Println("No config provided, using default settings")
}
// Use the config JoinURLs by default
joinURLs := cmd.config.Initialization.JoinURLs
// If a -join flag was passed, these should override the config
if join != "" {
joinURLs = join
}
cmd.CheckConfig()
cmd.Open(cmd.config, joinURLs)
// Wait indefinitely.
<-(chan struct{})(nil)
return nil
}
// CheckConfig validates the configuration
func (cmd *RunCommand) CheckConfig() {
if !(cmd.config.Data.Enabled || cmd.config.Broker.Enabled) {
cmd.Logger.Fatal("Node must be configured as a broker node, data node, or as both. Run `influxd config` to generate a valid configuration.")
}
if cmd.config.Broker.Enabled && cmd.config.Broker.Dir == "" {
cmd.Logger.Fatal("Broker.Dir must be specified. Run `influxd config` to generate a valid configuration.")
}
if cmd.config.Data.Enabled && cmd.config.Data.Dir == "" {
cmd.Logger.Fatal("Data.Dir must be specified. Run `influxd config` to generate a valid configuration.")
}
}
func (cmd *RunCommand) Open(config *Config, join string) (*messaging.Broker, *influxdb.Server, *raft.Log) {
if config != nil {
cmd.config = config
}
log.Printf("influxdb started, version %s, commit %s", version, commit)
// Parse join urls from the --join flag.
joinURLs := parseURLs(join)
// Open broker & raft log, initialize or join as necessary.
if cmd.config.Broker.Enabled {
cmd.openBroker(joinURLs)
// If were running as a broker locally, always connect to it since it must
// be ready before we can start the data node.
joinURLs = []url.URL{cmd.node.broker.URL()}
}
// Start the broker handler.
h := &Handler{
Config: config,
Broker: cmd.node.broker,
Log: cmd.node.raftLog,
}
// We want to make sure we are spun up before we exit this function, so we manually listen and serve
listener, err := net.Listen("tcp", cmd.config.ClusterAddr())
if err != nil {
log.Fatalf("TCP server failed to listen on %s. %s ", cmd.config.ClusterAddr(), err)
}
go func() {
err := http.Serve(listener, h)
if err != nil {
log.Fatalf("TCP server failed to server on %s: %s", cmd.config.ClusterAddr(), err)
}
}()
log.Printf("TCP server listening on %s", cmd.config.ClusterAddr())
var s *influxdb.Server
// Open server, initialize or join as necessary.
if cmd.config.Data.Enabled {
//FIXME: Need to also pass in dataURLs to bootstrap a data node
s = cmd.openServer(joinURLs)
s.SetAuthenticationEnabled(cmd.config.Authentication.Enabled)
// Enable retention policy enforcement if requested.
if cmd.config.Data.RetentionCheckEnabled {
interval := time.Duration(cmd.config.Data.RetentionCheckPeriod)
if err := s.StartRetentionPolicyEnforcement(interval); err != nil {
log.Fatalf("retention policy enforcement failed: %s", err.Error())
}
log.Printf("broker enforcing retention policies with check interval of %s", interval)
}
// Start shard group pre-create
interval := cmd.config.ShardGroupPreCreateCheckPeriod()
if err := s.StartShardGroupsPreCreate(interval); err != nil {
log.Fatalf("shard group pre-create failed: %s", err.Error())
}
log.Printf("shard group pre-create with check interval of %s", interval)
}
// Start the server handler. Attach to broker if listening on the same port.
if s != nil {
h.Server = s
if config.Snapshot.Enabled {
// Start snapshot handler.
go func() {
log.Fatal(http.ListenAndServe(
cmd.config.SnapshotAddr(),
&httpd.SnapshotHandler{
CreateSnapshotWriter: s.CreateSnapshotWriter,
},
))
}()
log.Printf("snapshot endpoint listening on %s", cmd.config.SnapshotAddr())
} else {
log.Println("snapshot endpoint disabled")
}
// Start the admin interface on the default port
if cmd.config.Admin.Enabled {
port := fmt.Sprintf(":%d", cmd.config.Admin.Port)
log.Printf("starting admin server on %s", port)
a := admin.NewServer(port)
go a.ListenAndServe()
}
// Spin up the collectd server
if cmd.config.Collectd.Enabled {
c := cmd.config.Collectd
cs := collectd.NewServer(s, c.TypesDB)
cs.Database = c.Database
err := collectd.ListenAndServe(cs, c.ConnectionString(cmd.config.BindAddress))
if err != nil {
log.Printf("failed to start collectd Server: %v\n", err.Error())
}
}
// Start the server bound to a UDP listener
if cmd.config.UDP.Enabled {
log.Printf("Starting UDP listener on %s", cmd.config.APIAddrUDP())
u := udp.NewUDPServer(s)
if err := u.ListenAndServe(cmd.config.APIAddrUDP()); err != nil {
log.Printf("Failed to start UDP listener on %s: %s", cmd.config.APIAddrUDP(), err)
}
}
// Spin up any Graphite servers
for _, c := range cmd.config.Graphites {
if !c.Enabled {
continue
}
// Configure Graphite parsing.
parser := graphite.NewParser()
parser.Separator = c.NameSeparatorString()
parser.LastEnabled = c.LastEnabled()
if err := s.CreateDatabaseIfNotExists(c.DatabaseString()); err != nil {
log.Fatalf("failed to create database for %s Graphite server: %s", c.Protocol, err.Error())
}
// Spin up the server.
var g graphite.Server
g, err := graphite.NewServer(c.Protocol, parser, s, c.DatabaseString())
if err != nil {
log.Fatalf("failed to initialize %s Graphite server: %s", c.Protocol, err.Error())
}
err = g.ListenAndServe(c.ConnectionString(cmd.config.BindAddress))
if err != nil {
log.Fatalf("failed to start %s Graphite server: %s", c.Protocol, err.Error())
}
}
// Spin up any OpenTSDB servers
if config.OpenTSDB.Enabled {
o := config.OpenTSDB
db := o.DatabaseString()
laddr := o.ListenAddress(config.BindAddress)
policy := o.RetentionPolicy
if err := s.CreateDatabaseIfNotExists(db); err != nil {
log.Fatalf("failed to create database for OpenTSDB server: %s", err.Error())
}
if policy != "" {
// Ensure retention policy exists.
rp := influxdb.NewRetentionPolicy(policy)
if err := s.CreateRetentionPolicyIfNotExists(db, rp); err != nil {
log.Fatalf("failed to create retention policy for OpenTSDB: %s", err.Error())
}
}
os := opentsdb.NewServer(s, policy, db)
log.Println("Starting OpenTSDB service on", laddr)
go os.ListenAndServe(laddr)
}
// Start up self-monitoring if enabled.
if cmd.config.Monitoring.Enabled {
database := monitoringDatabase
policy := monitoringRetentionPolicy
interval := time.Duration(cmd.config.Monitoring.WriteInterval)
// Ensure database exists.
if err := s.CreateDatabaseIfNotExists(database); err != nil {
log.Fatalf("failed to create database %s for internal monitoring: %s", database, err.Error())
}
// Ensure retention policy exists.
rp := influxdb.NewRetentionPolicy(policy)
if err := s.CreateRetentionPolicyIfNotExists(database, rp); err != nil {
log.Fatalf("failed to create retention policy for internal monitoring: %s", err.Error())
}
s.StartSelfMonitoring(database, policy, interval)
log.Printf("started self-monitoring at interval of %s", interval)
}
}
// unless disabled, start the loop to report anonymous usage stats every 24h
if !cmd.config.ReportingDisabled {
if cmd.config.Broker.Enabled && cmd.config.Data.Enabled {
// Make sure we have a config object b4 we try to use it.
if clusterID := cmd.node.broker.Broker.ClusterID(); clusterID != 0 {
go s.StartReportingLoop(clusterID)
}
} else {
log.Fatalln("failed to start reporting because not running as a broker and a data node")
}
}
var b *messaging.Broker
if cmd.node.broker != nil {
b = cmd.node.broker.Broker
// have it occasionally tell a data node in the cluster to run continuous queries
if cmd.config.ContinuousQuery.Disabled {
log.Printf("Not running continuous queries. [continuous_queries].disabled is set to true.")
} else {
cmd.node.broker.RunContinuousQueryLoop()
}
}
return b, s, cmd.node.raftLog
}
func (cmd *RunCommand) Close() {
cmd.node.Close()
}
// write the current process id to a file specified by path.
func writePIDFile(path string) {
if path == "" {
return
}
// Ensure the required directory structure exists.
err := os.MkdirAll(filepath.Dir(path), 0755)
if err != nil {
log.Fatal(err)
}
// Retrieve the PID and write it.
pid := strconv.Itoa(os.Getpid())
if err := ioutil.WriteFile(path, []byte(pid), 0644); err != nil {
log.Fatal(err)
}
}
// parseConfig parses the configuration from a given path. Sets overrides as needed.
func parseConfig(path, hostname string) (*Config, error) {
if path == "" {
return NewConfig(), nil
}
// Parse configuration.
config, err := ParseConfigFile(path)
if err != nil {
return nil, fmt.Errorf("config: %s", err)
}
// Override config properties.
if hostname != "" {
config.Hostname = hostname
}
return config, nil
}
// creates and initializes a broker.
func (cmd *RunCommand) openBroker(brokerURLs []url.URL) {
path := cmd.config.BrokerDir()
u := cmd.config.ClusterURL()
raftTracing := cmd.config.Logging.RaftTracing
// Create broker
b := influxdb.NewBroker()
cmd.node.broker = b
// Create raft log.
l := raft.NewLog()
l.SetURL(u)
l.DebugEnabled = raftTracing
b.Log = l
cmd.node.raftLog = l
// Open broker so it can feed last index data to the log.
if err := b.Open(path); err != nil {
log.Fatalf("failed to open broker at %s : %s", path, err)
}
log.Printf("broker opened at %s", path)
// Attach the broker as the finite state machine of the raft log.
l.FSM = &messaging.RaftFSM{Broker: b}
// Open raft log inside broker directory.
if err := l.Open(filepath.Join(path, "raft")); err != nil {
log.Fatalf("raft: %s", err)
}
index, _ := l.LastLogIndexTerm()
// Checks to see if the raft index is 0. If it's 0, it might be the first
// node in the cluster and must initialize or join
if index == 0 {
// If we have join URLs, then attemp to join the cluster
if len(brokerURLs) > 0 {
joinLog(l, brokerURLs)
return
}
if err := l.Initialize(); err != nil {
log.Fatalf("initialize raft log: %s", err)
}
u := b.Broker.URL()
log.Printf("initialized broker: %s\n", (&u).String())
} else {
log.Printf("broker already member of cluster. Using existing state and ignoring join URLs")
}
}
// joins a raft log to an existing cluster.
func joinLog(l *raft.Log, brokerURLs []url.URL) {
// Attempts to join each server until successful.
for _, u := range brokerURLs {
if err := l.Join(u); err != nil {
log.Printf("join: failed to connect to raft cluster: %s: %s", (&u).String(), err)
} else {
log.Printf("join: connected raft log to %s", (&u).String())
return
}
}
log.Fatalf("join: failed to connect raft log to any specified server")
}
// creates and initializes a server.
func (cmd *RunCommand) openServer(joinURLs []url.URL) *influxdb.Server {
// Create messaging client to the brokers.
c := influxdb.NewMessagingClient(cmd.config.ClusterURL())
c.SetURLs(joinURLs)
if err := c.Open(filepath.Join(cmd.config.Data.Dir, messagingClientFile)); err != nil {
log.Fatalf("messaging client error: %s", err)
}
// If no URLs exist on the client the return an error since we cannot reach a broker.
if len(c.URLs()) == 0 {
log.Fatal("messaging client has no broker URLs")
}
// Create and open the server.
s := influxdb.NewServer()
s.WriteTrace = cmd.config.Logging.WriteTracing
s.RetentionAutoCreate = cmd.config.Data.RetentionAutoCreate
s.RecomputePreviousN = cmd.config.ContinuousQuery.RecomputePreviousN
s.RecomputeNoOlderThan = time.Duration(cmd.config.ContinuousQuery.RecomputeNoOlderThan)
s.ComputeRunsPerInterval = cmd.config.ContinuousQuery.ComputeRunsPerInterval
s.ComputeNoMoreThan = time.Duration(cmd.config.ContinuousQuery.ComputeNoMoreThan)
s.Version = version
s.CommitHash = commit
cmd.node.dataNode = s
// Open server with data directory and broker client.
if err := s.Open(cmd.config.Data.Dir, c); err != nil {
log.Fatalf("failed to open data node: %v", err.Error())
}
log.Printf("data node opened at %s", cmd.config.Data.Dir)
dataNodeIndex := s.Index()
if dataNodeIndex == 0 {
if len(joinURLs) > 0 {
joinServer(s, cmd.config.ClusterURL(), joinURLs)
return s
}
if err := s.Initialize(cmd.config.ClusterURL()); err != nil {
log.Fatalf("server initialization error: %s", err)
}
u := cmd.config.ClusterURL()
log.Printf("initialized data node: %s\n", (&u).String())
return s
} else {
log.Printf("data node already member of cluster. Using existing state and ignoring join URLs")
}
return s
}
// joins a server to an existing cluster.
func joinServer(s *influxdb.Server, u url.URL, joinURLs []url.URL) {
// TODO: Use separate broker and data join urls.
// Create data node on an existing data node.
for _, joinURL := range joinURLs {
if err := s.Join(&u, &joinURL); err != nil {
// No data nodes could be found to join. We're the first.
if err == influxdb.ErrDataNodeNotFound {
if err := s.Initialize(u); err != nil {
log.Fatalf("server initialization error: %s", err)
}
log.Printf("initialized data node: %s\n", (&u).String())
return
}
log.Printf("join: failed to connect data node: %s: %s", (&u).String(), err)
} else {
log.Printf("join: connected data node to %s", u)
return
}
}
log.Fatalf("join: failed to connect data node to any specified server")
}
// parses a comma-delimited list of URLs.
func parseURLs(s string) (a []url.URL) {
if s == "" {
return nil
}
for _, s := range strings.Split(s, ",") {
u, err := url.Parse(s)
if err != nil {
log.Fatalf("cannot parse urls: %s", err)
}
a = append(a, *u)
}
return
}
// returns true if the file exists.
func fileExists(path string) bool {
if _, err := os.Stat(path); os.IsNotExist(err) {
return false
}
return true
}
func printRunUsage() {
log.Printf(`usage: run [flags]
run starts the broker and data node server. If this is the first time running
the command then a new cluster will be initialized unless the -join argument
is used.
-config <path>
Set the path to the configuration file.
-hostname <name>
Override the hostname, the 'hostname' configuration
option will be overridden.
-join <url>
Joins the server to an existing cluster.
-pidfile <path>
Write process ID to a file.
`)
}