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start_master.go
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start_master.go
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package start
import (
"errors"
"fmt"
"io"
"io/ioutil"
"net"
"os"
"path"
"path/filepath"
"strings"
"github.com/coreos/go-systemd/daemon"
"github.com/golang/glog"
"github.com/spf13/cobra"
kerrors "k8s.io/kubernetes/pkg/api/errors"
"k8s.io/kubernetes/pkg/capabilities"
kcmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
kubelettypes "k8s.io/kubernetes/pkg/kubelet/types"
"k8s.io/kubernetes/pkg/util/sets"
"github.com/openshift/origin/pkg/cmd/server/admin"
configapi "github.com/openshift/origin/pkg/cmd/server/api"
configapilatest "github.com/openshift/origin/pkg/cmd/server/api/latest"
"github.com/openshift/origin/pkg/cmd/server/api/validation"
"github.com/openshift/origin/pkg/cmd/server/bootstrappolicy"
"github.com/openshift/origin/pkg/cmd/server/etcd"
"github.com/openshift/origin/pkg/cmd/server/kubernetes"
"github.com/openshift/origin/pkg/cmd/server/origin"
cmdutil "github.com/openshift/origin/pkg/cmd/util"
"github.com/openshift/origin/pkg/version"
)
type MasterOptions struct {
MasterArgs *MasterArgs
CreateCertificates bool
ConfigFile string
Output io.Writer
DisabledFeatures []string
}
func (o *MasterOptions) DefaultsFromName(basename string) {
if cmdutil.GetProductName(basename) == cmdutil.ProductAtomicEnterprise {
o.DisabledFeatures = configapi.AtomicDisabledFeatures
}
}
const masterLong = `Start a master server
This command helps you launch a master server. Running
$ %[1]s start master
will start a master listening on all interfaces, launch an etcd server to store
persistent data, and launch the Kubernetes system components. The server will run in the
foreground until you terminate the process.
Note: starting the master without passing the --master address will attempt to find the IP
address that will be visible inside running Docker containers. This is not always successful,
so if you have problems tell the master what public address it should use via --master=<ip>.
You may also pass --etcd=<address> to connect to an external etcd server.
You may also pass --kubeconfig=<path> to connect to an external Kubernetes cluster.`
// NewCommandStartMaster provides a CLI handler for 'start master' command
func NewCommandStartMaster(basename string, out io.Writer) (*cobra.Command, *MasterOptions) {
options := &MasterOptions{Output: out}
options.DefaultsFromName(basename)
cmd := &cobra.Command{
Use: "master",
Short: "Launch a master",
Long: fmt.Sprintf(masterLong, basename),
Run: func(c *cobra.Command, args []string) {
if err := options.Complete(); err != nil {
fmt.Fprintln(c.Out(), kcmdutil.UsageError(c, err.Error()))
return
}
if err := options.Validate(args); err != nil {
fmt.Fprintln(c.Out(), kcmdutil.UsageError(c, err.Error()))
return
}
startProfiler()
if err := options.StartMaster(); err != nil {
if kerrors.IsInvalid(err) {
if details := err.(*kerrors.StatusError).ErrStatus.Details; details != nil {
fmt.Fprintf(c.Out(), "Invalid %s %s\n", details.Kind, details.Name)
for _, cause := range details.Causes {
fmt.Fprintf(c.Out(), " %s: %s\n", cause.Field, cause.Message)
}
os.Exit(255)
}
}
glog.Fatal(err)
}
},
}
options.MasterArgs = NewDefaultMasterArgs()
options.MasterArgs.StartAPI = true
options.MasterArgs.StartControllers = true
options.MasterArgs.OverrideConfig = func(config *configapi.MasterConfig) error {
if config.KubernetesMasterConfig != nil && options.MasterArgs.MasterAddr.Provided {
if ip := net.ParseIP(options.MasterArgs.MasterAddr.Host); ip != nil {
glog.V(2).Infof("Using a masterIP override %q", ip)
config.KubernetesMasterConfig.MasterIP = ip.String()
}
}
return nil
}
flags := cmd.Flags()
flags.Var(options.MasterArgs.ConfigDir, "write-config", "Directory to write an initial config into. After writing, exit without starting the server.")
flags.StringVar(&options.ConfigFile, "config", "", "Location of the master configuration file to run from. When running from a configuration file, all other command-line arguments are ignored.")
flags.BoolVar(&options.CreateCertificates, "create-certs", true, "Indicates whether missing certs should be created")
BindMasterArgs(options.MasterArgs, flags, "")
BindListenArg(options.MasterArgs.ListenArg, flags, "")
BindImageFormatArgs(options.MasterArgs.ImageFormatArgs, flags, "")
BindKubeConnectionArgs(options.MasterArgs.KubeConnectionArgs, flags, "")
BindNetworkArgs(options.MasterArgs.NetworkArgs, flags, "")
// autocompletion hints
cmd.MarkFlagFilename("write-config")
cmd.MarkFlagFilename("config", "yaml", "yml")
startControllers, _ := NewCommandStartMasterControllers("controllers", basename, out)
startAPI, _ := NewCommandStartMasterAPI("api", basename, out)
cmd.AddCommand(startAPI)
cmd.AddCommand(startControllers)
return cmd, options
}
func (o MasterOptions) Validate(args []string) error {
if len(args) != 0 {
return errors.New("no arguments are supported for start master")
}
if o.IsWriteConfigOnly() {
if o.IsRunFromConfig() {
return errors.New("--config may not be set if --write-config is set")
}
}
if len(o.MasterArgs.ConfigDir.Value()) == 0 {
return errors.New("configDir must have a value")
}
// if we are not starting up using a config file, run the argument validation
if !o.IsRunFromConfig() {
if err := o.MasterArgs.Validate(); err != nil {
return err
}
}
return nil
}
func (o *MasterOptions) Complete() error {
if !o.MasterArgs.ConfigDir.Provided() {
o.MasterArgs.ConfigDir.Default("openshift.local.config/master")
}
nodeList := sets.NewString()
// take everything toLower
for _, s := range o.MasterArgs.NodeList {
nodeList.Insert(strings.ToLower(s))
}
o.MasterArgs.NodeList = nodeList.List()
return nil
}
// StartMaster calls RunMaster and then waits forever
func (o MasterOptions) StartMaster() error {
if err := o.RunMaster(); err != nil {
return err
}
if o.IsWriteConfigOnly() {
return nil
}
// TODO: this should be encapsulated by RunMaster, but StartAllInOne has no
// way to communicate whether RunMaster should block.
go daemon.SdNotify("READY=1")
select {}
}
// RunMaster takes the options and:
// 1. Creates certs if needed
// 2. Reads fully specified master config OR builds a fully specified master config from the args
// 3. Writes the fully specified master config and exits if needed
// 4. Starts the master based on the fully specified config
func (o MasterOptions) RunMaster() error {
startUsingConfigFile := !o.IsWriteConfigOnly() && o.IsRunFromConfig()
if !startUsingConfigFile && o.CreateCertificates {
glog.V(2).Infof("Generating master configuration")
if err := o.CreateCerts(); err != nil {
return err
}
if err := o.CreateBootstrapPolicy(); err != nil {
return err
}
}
var masterConfig *configapi.MasterConfig
var err error
if startUsingConfigFile {
masterConfig, err = configapilatest.ReadAndResolveMasterConfig(o.ConfigFile)
} else {
masterConfig, err = o.MasterArgs.BuildSerializeableMasterConfig()
}
if err != nil {
return err
}
if o.IsWriteConfigOnly() {
// Resolve relative to CWD
cwd, err := os.Getwd()
if err != nil {
return err
}
if err := configapi.ResolveMasterConfigPaths(masterConfig, cwd); err != nil {
return err
}
// Relativize to config file dir
base, err := cmdutil.MakeAbs(filepath.Dir(o.MasterArgs.GetConfigFileToWrite()), cwd)
if err != nil {
return err
}
if err := configapi.RelativizeMasterConfigPaths(masterConfig, base); err != nil {
return err
}
content, err := configapilatest.WriteYAML(masterConfig)
if err != nil {
return err
}
if err := os.MkdirAll(path.Dir(o.MasterArgs.GetConfigFileToWrite()), os.FileMode(0755)); err != nil {
return err
}
if err := ioutil.WriteFile(o.MasterArgs.GetConfigFileToWrite(), content, 0644); err != nil {
return err
}
fmt.Fprintf(o.Output, "Wrote master config to: %s\n", o.MasterArgs.GetConfigFileToWrite())
return nil
}
if o.MasterArgs.OverrideConfig != nil {
if err := o.MasterArgs.OverrideConfig(masterConfig); err != nil {
return err
}
}
// Inject disabled feature flags based on distribution being used and
// regardless of configuration. They aren't written to config file to
// prevent upgrade path issues.
masterConfig.DisabledFeatures.Add(o.DisabledFeatures...)
validationResults := validation.ValidateMasterConfig(masterConfig)
if len(validationResults.Warnings) != 0 {
for _, warning := range validationResults.Warnings {
glog.Warningf("%v", warning)
}
}
if len(validationResults.Errors) != 0 {
return kerrors.NewInvalid("MasterConfig", o.ConfigFile, validationResults.Errors)
}
if !o.MasterArgs.StartControllers {
masterConfig.Controllers = configapi.ControllersDisabled
}
m := &Master{
config: masterConfig,
api: o.MasterArgs.StartAPI,
controllers: o.MasterArgs.StartControllers,
}
return m.Start()
}
func (o MasterOptions) CreateBootstrapPolicy() error {
writeBootstrapPolicy := admin.CreateBootstrapPolicyFileOptions{
File: o.MasterArgs.GetPolicyFile(),
OpenShiftSharedResourcesNamespace: bootstrappolicy.DefaultOpenShiftSharedResourcesNamespace,
}
return writeBootstrapPolicy.CreateBootstrapPolicyFile()
}
func (o MasterOptions) CreateCerts() error {
masterAddr, err := o.MasterArgs.GetMasterAddress()
if err != nil {
return err
}
publicMasterAddr, err := o.MasterArgs.GetMasterPublicAddress()
if err != nil {
return err
}
signerName := admin.DefaultSignerName()
hostnames, err := o.MasterArgs.GetServerCertHostnames()
if err != nil {
return err
}
mintAllCertsOptions := admin.CreateMasterCertsOptions{
CertDir: o.MasterArgs.ConfigDir.Value(),
SignerName: signerName,
Hostnames: hostnames.List(),
APIServerURL: masterAddr.String(),
PublicAPIServerURL: publicMasterAddr.String(),
Output: o.Output,
}
if err := mintAllCertsOptions.Validate(nil); err != nil {
return err
}
if err := mintAllCertsOptions.CreateMasterCerts(); err != nil {
return err
}
return nil
}
func buildKubernetesMasterConfig(openshiftConfig *origin.MasterConfig) (*kubernetes.MasterConfig, error) {
if openshiftConfig.Options.KubernetesMasterConfig == nil {
return nil, nil
}
kubeConfig, err := kubernetes.BuildKubernetesMasterConfig(openshiftConfig.Options, openshiftConfig.RequestContextMapper, openshiftConfig.KubeClient())
return kubeConfig, err
}
// Master encapsulates starting the components of the master
type Master struct {
config *configapi.MasterConfig
controllers bool
api bool
}
// NewMaster create a master launcher
func NewMaster(config *configapi.MasterConfig, controllers, api bool) *Master {
return &Master{
config: config,
controllers: controllers,
api: api,
}
}
// Start launches a master. It will error if possible, but some background processes may still
// be running and the process should exit after it finishes.
func (m *Master) Start() error {
// Allow privileged containers
// TODO: make this configurable and not the default https://github.com/openshift/origin/issues/662
capabilities.Initialize(capabilities.Capabilities{
AllowPrivileged: true,
PrivilegedSources: capabilities.PrivilegedSources{
HostNetworkSources: []string{kubelettypes.ApiserverSource, kubelettypes.FileSource},
HostPIDSources: []string{kubelettypes.ApiserverSource, kubelettypes.FileSource},
HostIPCSources: []string{kubelettypes.ApiserverSource, kubelettypes.FileSource},
},
})
openshiftConfig, err := origin.BuildMasterConfig(*m.config)
if err != nil {
return err
}
kubeMasterConfig, err := buildKubernetesMasterConfig(openshiftConfig)
if err != nil {
return err
}
if m.api {
glog.Infof("Starting master on %s (%s)", m.config.ServingInfo.BindAddress, version.Get().String())
glog.Infof("Public master address is %s", m.config.AssetConfig.MasterPublicURL)
if len(m.config.DisabledFeatures) > 0 {
glog.V(4).Infof("Disabled features: %s", strings.Join(m.config.DisabledFeatures, ", "))
}
glog.Infof("Using images from %q", openshiftConfig.ImageFor("<component>"))
if err := startAPI(openshiftConfig, kubeMasterConfig); err != nil {
return err
}
if m.controllers {
// run controllers asynchronously (not required to be "ready")
go func() {
if err := startControllers(openshiftConfig, kubeMasterConfig); err != nil {
glog.Fatal(err)
}
}()
}
return nil
}
if m.controllers {
glog.Infof("Starting controllers on %s (%s)", m.config.ServingInfo.BindAddress, version.Get().String())
if len(m.config.DisabledFeatures) > 0 {
glog.V(4).Infof("Disabled features: %s", strings.Join(m.config.DisabledFeatures, ", "))
}
glog.Infof("Using images from %q", openshiftConfig.ImageFor("<component>"))
if err := startHealth(openshiftConfig); err != nil {
return err
}
if err := startControllers(openshiftConfig, kubeMasterConfig); err != nil {
return err
}
}
return nil
}
func startHealth(openshiftConfig *origin.MasterConfig) error {
openshiftConfig.RunHealth()
return nil
}
// startAPI starts the components of the master that are considered part of the API - the Kubernetes
// API and core controllers, the Origin API, the group, policy, project, and authorization caches,
// etcd, the asset server (for the UI), the OAuth server endpoints, and the DNS server.
// TODO: allow to be more granularly targeted
func startAPI(oc *origin.MasterConfig, kc *kubernetes.MasterConfig) error {
// start etcd
if oc.Options.EtcdConfig != nil {
etcd.RunEtcd(oc.Options.EtcdConfig)
}
// verify we can connect to etcd with the provided config
if err := etcd.TestEtcdClient(oc.EtcdClient); err != nil {
return err
}
// Must start policy caching immediately
oc.RunGroupCache()
oc.RunPolicyCache()
oc.RunProjectCache()
unprotectedInstallers := []origin.APIInstaller{}
if oc.Options.OAuthConfig != nil {
authConfig, err := origin.BuildAuthConfig(oc.Options)
if err != nil {
return err
}
unprotectedInstallers = append(unprotectedInstallers, authConfig)
}
var standaloneAssetConfig *origin.AssetConfig
if oc.WebConsoleEnabled() {
config, err := origin.BuildAssetConfig(*oc.Options.AssetConfig)
if err != nil {
return err
}
if oc.Options.AssetConfig.ServingInfo.BindAddress == oc.Options.ServingInfo.BindAddress {
unprotectedInstallers = append(unprotectedInstallers, config)
} else {
standaloneAssetConfig = config
}
}
if kc != nil {
oc.Run([]origin.APIInstaller{kc}, unprotectedInstallers)
} else {
_, kubeClientConfig, err := configapi.GetKubeClient(oc.Options.MasterClients.ExternalKubernetesKubeConfig)
if err != nil {
return err
}
proxy := &kubernetes.ProxyConfig{
ClientConfig: kubeClientConfig,
}
oc.Run([]origin.APIInstaller{proxy}, unprotectedInstallers)
}
oc.InitializeObjects()
if standaloneAssetConfig != nil {
standaloneAssetConfig.Run()
}
if oc.Options.DNSConfig != nil {
oc.RunDNSServer()
}
oc.RunProjectAuthorizationCache()
return nil
}
// startControllers launches the controllers
func startControllers(oc *origin.MasterConfig, kc *kubernetes.MasterConfig) error {
if oc.Options.Controllers == configapi.ControllersDisabled {
return nil
}
go func() {
oc.ControllerPlugStart()
// when a manual shutdown (DELETE /controllers) or lease lost occurs, the process should exit
// this ensures no code is still running as a controller, and allows a process manager to reset
// the controller to come back into a candidate state and compete for the lease
oc.ControllerPlug.WaitForStop()
glog.Fatalf("Controller shutdown requested")
}()
oc.ControllerPlug.WaitForStart()
glog.Infof("Controllers starting (%s)", oc.Options.Controllers)
// Start these first, because they provide credentials for other controllers' clients
oc.RunServiceAccountsController()
oc.RunServiceAccountTokensController()
// used by admission controllers
oc.RunServiceAccountPullSecretsControllers()
oc.RunSecurityAllocationController()
if kc != nil {
_, rcClient, err := oc.GetServiceAccountClients(oc.ReplicationControllerServiceAccount)
if err != nil {
glog.Fatalf("Could not get client for replication controller: %v", err)
}
_, jobClient, err := oc.GetServiceAccountClients(oc.JobControllerServiceAccount)
if err != nil {
glog.Fatalf("Could not get client for job controller: %v", err)
}
hpaOClient, hpaKClient, err := oc.GetServiceAccountClients(oc.HPAControllerServiceAccount)
if err != nil {
glog.Fatalf("Could not get client for HPA controller: %v", err)
}
_, pvKClient, err := oc.GetServiceAccountClients(oc.PersistentVolumeControllerServiceAccount)
if err != nil {
glog.Fatalf("Could not get client for persistent volume controller: %v", err)
}
// called by admission control
kc.RunResourceQuotaManager()
// no special order
kc.RunNodeController()
kc.RunScheduler()
kc.RunReplicationController(rcClient)
if kc.Master.EnableExp {
kc.RunJobController(jobClient)
kc.RunHPAController(hpaOClient, hpaKClient, oc.Options.PolicyConfig.OpenShiftInfrastructureNamespace)
}
kc.RunEndpointController()
kc.RunNamespaceController()
kc.RunPersistentVolumeClaimBinder()
kc.RunPersistentVolumeClaimRecycler(oc.ImageFor("deployer"), pvKClient)
glog.Infof("Started Kubernetes Controllers")
}
// no special order
if configapi.IsBuildEnabled(&oc.Options) {
oc.RunBuildController()
oc.RunBuildPodController()
oc.RunBuildConfigChangeController()
oc.RunBuildImageChangeTriggerController()
}
oc.RunDeploymentController()
oc.RunDeployerPodController()
oc.RunDeploymentConfigController()
oc.RunDeploymentConfigChangeController()
oc.RunDeploymentImageChangeTriggerController()
oc.RunImageImportController()
oc.RunOriginNamespaceController()
oc.RunSDNController()
glog.Infof("Started Origin Controllers")
return nil
}
func (o MasterOptions) IsWriteConfigOnly() bool {
return o.MasterArgs.ConfigDir.Provided()
}
func (o MasterOptions) IsRunFromConfig() bool {
return (len(o.ConfigFile) > 0)
}