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264 lines
6.8 KiB
264 lines
6.8 KiB
/*
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Copyright 2016 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package main // import "k8s.io/helm/cmd/tiller"
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import (
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"fmt"
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"io/ioutil"
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"net"
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"net/http"
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"os"
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"strings"
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"github.com/spf13/cobra"
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log "github.com/Sirupsen/logrus"
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"k8s.io/helm/pkg/kube"
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"k8s.io/helm/pkg/logutil"
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"k8s.io/helm/pkg/proto/hapi/services"
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"k8s.io/helm/pkg/storage"
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"k8s.io/helm/pkg/storage/driver"
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"k8s.io/helm/pkg/tiller"
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"k8s.io/helm/pkg/tiller/environment"
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"k8s.io/helm/pkg/version"
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)
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const (
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storageMemory = "memory"
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storageConfigMap = "configmap"
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)
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// Variable for the string log level
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var level string
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// rootServer is the root gRPC server.
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//
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// Each gRPC service registers itself to this server during init().
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var rootServer = tiller.NewServer()
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// env is the default environment.
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//
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// Any changes to env should be done before rootServer.Serve() is called.
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var env = environment.New()
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var (
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grpcAddr = ":44134"
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probeAddr = ":44135"
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traceAddr = ":44136"
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enableTracing = false
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store = storageConfigMap
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)
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const globalUsage = `The Kubernetes Helm server.
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Tiller is the server for Helm. It provides in-cluster resource management.
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By default, Tiller listens for gRPC connections on port 44134.
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`
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var rootCommand = &cobra.Command{
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Use: "tiller",
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Short: "The Kubernetes Helm server.",
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Long: globalUsage,
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Run: start,
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}
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// logger with base fields for this package
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var logger *log.Entry
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func init() {
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logger = log.WithFields(log.Fields{
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"_package": "main",
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})
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// Makes the logger use a full timestamp
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log.SetFormatter(&log.TextFormatter{FullTimestamp: true})
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}
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func main() {
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p := rootCommand.PersistentFlags()
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p.StringVarP(&grpcAddr, "listen", "l", ":44134", "address:port to listen on")
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p.StringVar(&store, "storage", storageConfigMap, "storage driver to use. One of 'configmap' or 'memory'")
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p.BoolVar(&enableTracing, "trace", false, "enable rpc tracing")
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p.StringVar(&level, "log-level", "INFO", "level to log at. One of 'ERROR', 'INFO', 'DEBUG'")
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if err := rootCommand.Execute(); err != nil {
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fmt.Fprint(os.Stderr, err)
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os.Exit(1)
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}
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}
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func start(c *cobra.Command, args []string) {
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// Set the log level first
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logLevel, err := logutil.GetLevel(level)
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if err != nil {
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "start",
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"error": err,
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}).Error("Unable to get log level")
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os.Exit(1)
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}
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "start",
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"level": level,
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}).Debug("Setting log level")
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log.SetLevel(logLevel)
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clientset, err := kube.New(nil).ClientSet()
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if err != nil {
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "start",
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"error": err,
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}).Error("Cannot initialize Kubernetes connection")
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os.Exit(1)
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}
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "start",
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"driver": store,
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}).Debug("Setting storage driver")
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switch store {
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case storageMemory:
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env.Releases = storage.Init(driver.NewMemory())
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case storageConfigMap:
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env.Releases = storage.Init(driver.NewConfigMaps(clientset.Core().ConfigMaps(namespace())))
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}
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "start",
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"address": grpcAddr,
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}).Debug("Starting GRPC server")
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lstn, err := net.Listen("tcp", grpcAddr)
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if err != nil {
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "start",
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"error": err,
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}).Error("Server died")
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fmt.Fprintf(os.Stderr, "Server died: %s\n", err)
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os.Exit(1)
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}
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "start",
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}).Infof("Tiller %s running", version.GetVersion())
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "start",
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}).Infof("GRPC listening on %s", grpcAddr)
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "start",
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}).Infof("Probes listening on %s", probeAddr)
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "start",
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}).Infof("Storage driver is %s", env.Releases.Name())
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if enableTracing {
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "start",
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"address": grpcAddr,
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}).Debug("Starting GRPC trace")
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startTracing(traceAddr)
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}
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srvErrCh := make(chan error)
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probeErrCh := make(chan error)
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "start",
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}).Debug("Starting release server")
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go func() {
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svc := tiller.NewReleaseServer(env, clientset)
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services.RegisterReleaseServiceServer(rootServer, svc)
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if err := rootServer.Serve(lstn); err != nil {
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srvErrCh <- err
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}
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}()
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "start",
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}).Debug("Starting probes server")
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go func() {
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mux := newProbesMux()
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if err := http.ListenAndServe(probeAddr, mux); err != nil {
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probeErrCh <- err
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}
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}()
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select {
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case err := <-srvErrCh:
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "start",
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"error": err,
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}).Error("Release server died")
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os.Exit(1)
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case err := <-probeErrCh:
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "start",
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"error": err,
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}).Error("Probes server died")
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}
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}
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// namespace returns the namespace of tiller
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func namespace() string {
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "namespace",
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}).Debug("Getting tiller namespace")
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if ns := os.Getenv("TILLER_NAMESPACE"); ns != "" {
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "namespace",
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"namespace": ns,
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}).Debug("Found TILLER_NAMESPACE environment variable")
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return ns
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}
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "namespace",
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}).Debug("No namespace variable set. Attempting to get namespace from service account token")
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// Fall back to the namespace associated with the service account token, if available
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if data, err := ioutil.ReadFile("/var/run/secrets/kubernetes.io/serviceaccount/namespace"); err == nil {
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if ns := strings.TrimSpace(string(data)); len(ns) > 0 {
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "namespace",
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"namespace": ns,
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}).Debug("Found service account token namespace")
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return ns
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}
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}
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logger.WithFields(log.Fields{
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"_module": "tiller",
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"_context": "namespace",
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"namespace": environment.DefaultTillerNamespace,
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}).Debug("No namespaces found. Returning default namespace")
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return environment.DefaultTillerNamespace
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}
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