forked from openshift/origin
/
start_node.go
297 lines (243 loc) · 7.94 KB
/
start_node.go
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package start
import (
"errors"
"fmt"
"io/ioutil"
"os"
"path"
"path/filepath"
"strings"
"github.com/coreos/go-systemd/daemon"
"github.com/golang/glog"
"github.com/spf13/cobra"
kerrors "github.com/GoogleCloudPlatform/kubernetes/pkg/api/errors"
"github.com/GoogleCloudPlatform/kubernetes/pkg/client/record"
"github.com/openshift/origin/pkg/cmd/server/kubernetes"
"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"
cmdutil "github.com/openshift/origin/pkg/cmd/util"
"github.com/openshift/origin/pkg/cmd/util/docker"
)
type NodeOptions struct {
NodeArgs *NodeArgs
WriteConfigOnly bool
ConfigFile string
}
const longNodeCommandDesc = `
Start an OpenShift node
This command helps you launch an OpenShift node. Running
$ openshift start node --master=<masterIP>
will start an OpenShift node that attempts to connect to the master on the provided IP. The
node will run in the foreground until you terminate the process.
`
// NewCommandStartMaster provides a CLI handler for 'start' command
func NewCommandStartNode() (*cobra.Command, *NodeOptions) {
options := &NodeOptions{}
cmd := &cobra.Command{
Use: "node",
Short: "Launch OpenShift node",
Long: longNodeCommandDesc,
Run: func(c *cobra.Command, args []string) {
if err := options.Complete(); err != nil {
fmt.Println(err.Error())
c.Help()
return
}
if err := options.Validate(args); err != nil {
fmt.Println(err.Error())
c.Help()
return
}
startProfiler()
if err := options.StartNode(); err != nil {
glog.Fatal(err)
}
},
}
flags := cmd.Flags()
flags.BoolVar(&options.WriteConfigOnly, "write-config", false, "Indicates that the command should build the configuration from command-line arguments, write it to the location specified by --config, and exit.")
flags.StringVar(&options.ConfigFile, "config", "", "Location of the node configuration file to run from, or write to (when used with --write-config). When running from a configuration file, all other command-line arguments are ignored.")
options.NodeArgs = NewDefaultNodeArgs()
// make sure that KubeConnectionArgs and NodeArgs use the same CertArgs for this command
options.NodeArgs.KubeConnectionArgs.CertArgs = options.NodeArgs.CertArgs
BindNodeArgs(options.NodeArgs, flags, "")
BindListenArg(options.NodeArgs.ListenArg, flags, "")
BindImageFormatArgs(options.NodeArgs.ImageFormatArgs, flags, "")
BindKubeConnectionArgs(options.NodeArgs.KubeConnectionArgs, flags, "")
BindCertArgs(options.NodeArgs.CertArgs, flags, "")
return cmd, options
}
func (o NodeOptions) Validate(args []string) error {
if len(args) != 0 {
return errors.New("no arguments are supported for start node")
}
if o.WriteConfigOnly {
if len(o.ConfigFile) == 0 {
return errors.New("--config is required if --write-config is true")
}
}
return nil
}
func (o NodeOptions) Complete() error {
o.NodeArgs.NodeName = strings.ToLower(o.NodeArgs.NodeName)
return nil
}
// StartNode calls RunNode and then waits forever
func (o NodeOptions) StartNode() error {
if err := o.RunNode(); err != nil {
return err
}
if o.WriteConfigOnly {
return nil
}
select {}
return nil
}
// RunNode takes the options and:
// 1. Creates certs if needed
// 2. Reads fully specified node config OR builds a fully specified node config from the args
// 3. Writes the fully specified node config and exits if needed
// 4. Starts the node based on the fully specified config
func (o NodeOptions) RunNode() error {
startUsingConfigFile := !o.WriteConfigOnly && (len(o.ConfigFile) > 0)
mintCerts := o.NodeArgs.CertArgs.CreateCerts && !startUsingConfigFile
if mintCerts {
if err := o.CreateCerts(); err != nil {
return nil
}
}
var nodeConfig *configapi.NodeConfig
var err error
if startUsingConfigFile {
nodeConfig, err = ReadNodeConfig(o.ConfigFile)
} else {
nodeConfig, err = o.NodeArgs.BuildSerializeableNodeConfig()
}
if err != nil {
return err
}
if o.WriteConfigOnly {
// Resolve relative to CWD
cwd, err := os.Getwd()
if err != nil {
return err
}
if err := configapi.ResolveNodeConfigPaths(nodeConfig, cwd); err != nil {
return err
}
// Relativize to config file dir
base, err := cmdutil.MakeAbs(filepath.Dir(o.ConfigFile), cwd)
if err != nil {
return err
}
if err := configapi.RelativizeNodeConfigPaths(nodeConfig, base); err != nil {
return err
}
content, err := WriteNode(nodeConfig)
if err != nil {
return err
}
if err := ioutil.WriteFile(o.ConfigFile, content, 0644); err != nil {
return err
}
return nil
}
errs := validation.ValidateNodeConfig(nodeConfig)
if len(errs) != 0 {
return kerrors.NewInvalid("nodeConfig", "", errs)
}
_, kubeClientConfig, err := configapi.GetKubeClient(nodeConfig.MasterKubeConfig)
if err != nil {
return err
}
glog.Infof("Starting an OpenShift node, connecting to %s", kubeClientConfig.Host)
if err := StartNode(*nodeConfig); err != nil {
return err
}
return nil
}
func (o NodeOptions) CreateCerts() error {
signerOptions := &admin.CreateSignerCertOptions{
CertFile: admin.DefaultCertFilename(o.NodeArgs.CertArgs.CertDir, "ca"),
KeyFile: admin.DefaultKeyFilename(o.NodeArgs.CertArgs.CertDir, "ca"),
SerialFile: admin.DefaultSerialFilename(o.NodeArgs.CertArgs.CertDir, "ca"),
Name: admin.DefaultSignerName(),
}
if err := signerOptions.Validate(nil); err != nil {
return err
}
if _, err := signerOptions.CreateSignerCert(); err != nil {
return err
}
getSignerOptions := &admin.GetSignerCertOptions{
CertFile: admin.DefaultCertFilename(o.NodeArgs.CertArgs.CertDir, "ca"),
KeyFile: admin.DefaultKeyFilename(o.NodeArgs.CertArgs.CertDir, "ca"),
SerialFile: admin.DefaultSerialFilename(o.NodeArgs.CertArgs.CertDir, "ca"),
}
var dnsIP string
if len(o.NodeArgs.ClusterDNS) > 0 {
dnsIP = o.NodeArgs.ClusterDNS.String()
}
masterAddr, err := o.NodeArgs.KubeConnectionArgs.GetKubernetesAddress(&o.NodeArgs.DefaultKubernetesURL)
if err != nil {
return err
}
nodeConfigDir := path.Join(o.NodeArgs.CertArgs.CertDir, admin.DefaultNodeDir(o.NodeArgs.NodeName))
createNodeConfigOptions := admin.CreateNodeConfigOptions{
GetSignerCertOptions: getSignerOptions,
NodeConfigDir: nodeConfigDir,
NodeName: o.NodeArgs.NodeName,
Hostnames: []string{o.NodeArgs.NodeName},
VolumeDir: o.NodeArgs.VolumeDir,
NetworkContainerImage: o.NodeArgs.ImageFormatArgs.ImageTemplate.ExpandOrDie("pod"),
AllowDisabledDocker: o.NodeArgs.AllowDisabledDocker,
DNSDomain: o.NodeArgs.ClusterDomain,
DNSIP: dnsIP,
ListenAddr: o.NodeArgs.ListenArg.ListenAddr,
APIServerURL: masterAddr.String(),
APIServerCAFile: getSignerOptions.CertFile,
}
if err := createNodeConfigOptions.Validate(nil); err != nil {
return err
}
if err := createNodeConfigOptions.CreateNodeFolder(); err != nil {
return err
}
return nil
}
func ReadNodeConfig(filename string) (*configapi.NodeConfig, error) {
data, err := ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
config := &configapi.NodeConfig{}
if err := configapilatest.Codec.DecodeInto(data, config); err != nil {
return nil, err
}
base, err := cmdutil.MakeAbs(filepath.Dir(filename), "")
if err != nil {
return nil, err
}
if err := configapi.ResolveNodeConfigPaths(config, base); err != nil {
return nil, err
}
return config, nil
}
func StartNode(config configapi.NodeConfig) error {
nodeConfig, err := kubernetes.BuildKubernetesNodeConfig(config)
if err != nil {
return err
}
// TODO: recording should occur in individual components
if config.RecordEvents {
record.StartRecording(nodeConfig.Client.Events(""))
}
nodeConfig.EnsureVolumeDir()
nodeConfig.EnsureDocker(docker.NewHelper())
nodeConfig.RunProxy()
nodeConfig.RunKubelet()
go daemon.SdNotify("READY=1")
return nil
}