func NewInit(cfgPath string, cfg *kubeadmapi.MasterConfiguration, skipPreFlight bool) (*Init, error) {
if cfgPath != "" {
b, err := ioutil.ReadFile(cfgPath)
if err != nil {
return nil, fmt.Errorf("unable to read config from %q [%v]", cfgPath, err)
}
if err := runtime.DecodeInto(api.Codecs.UniversalDecoder(), b, cfg); err != nil {
return nil, fmt.Errorf("unable to decode config from %q [%v]", cfgPath, err)
}
}
// Auto-detect the IP
if len(cfg.API.AdvertiseAddresses) == 0 {
// TODO(phase1+) perhaps we could actually grab eth0 and eth1
ip, err := netutil.ChooseHostInterface()
if err != nil {
return nil, err
}
cfg.API.AdvertiseAddresses = []string{ip.String()}
}
if !skipPreFlight {
fmt.Println("Running pre-flight checks")
err := preflight.RunInitMasterChecks(cfg)
if err != nil {
return nil, &preflight.PreFlightError{Msg: err.Error()}
}
} else {
fmt.Println("Skipping pre-flight checks")
}
// validate version argument
ver, err := kubeadmutil.KubernetesReleaseVersion(cfg.KubernetesVersion)
if err != nil {
if cfg.KubernetesVersion != kubeadmapiext.DefaultKubernetesVersion {
return nil, err
} else {
ver = kubeadmapiext.DefaultKubernetesFallbackVersion
}
}
cfg.KubernetesVersion = ver
fmt.Println("Using Kubernetes version:", ver)
// TODO(phase1+) create a custom flag
if cfg.CloudProvider != "" {
if cloudprovider.IsCloudProvider(cfg.CloudProvider) {
fmt.Printf("cloud provider %q initialized for the control plane. Remember to set the same cloud provider flag on the kubelet.\n", cfg.CloudProvider)
} else {
return nil, fmt.Errorf("cloud provider %q is not supported, you can use any of %v, or leave it unset.\n", cfg.CloudProvider, cloudprovider.CloudProviders())
}
}
return &Init{cfg: cfg}, nil
}
// RunInit executes master node provisioning, including certificates, needed static pod manifests, etc.
func RunInit(out io.Writer, cmd *cobra.Command, args []string, cfg *kubeadmapi.MasterConfiguration) error {
// Auto-detect the IP
if len(cfg.API.AdvertiseAddresses) == 0 {
// TODO(phase1+) perhaps we could actually grab eth0 and eth1
ip, err := netutil.ChooseHostInterface()
if err != nil {
return err
}
cfg.API.AdvertiseAddresses = []string{ip.String()}
}
// TODO(phase1+) create a custom flag
if cfg.CloudProvider != "" {
if cloudprovider.IsCloudProvider(cfg.CloudProvider) {
fmt.Printf("<cmd/init> cloud provider %q initialized for the control plane. Remember to set the same cloud provider flag on the kubelet.\n", cfg.CloudProvider)
} else {
return fmt.Errorf("<cmd/init> cloud provider %q is not supported, you can use any of %v, or leave it unset.\n", cfg.CloudProvider, cloudprovider.CloudProviders())
}
}
if err := kubemaster.CreateTokenAuthFile(&cfg.Secrets); err != nil {
return err
}
if err := kubemaster.WriteStaticPodManifests(cfg); err != nil {
return err
}
caKey, caCert, err := kubemaster.CreatePKIAssets(cfg)
if err != nil {
return err
}
kubeconfigs, err := kubemaster.CreateCertsAndConfigForClients(cfg.API.AdvertiseAddresses, []string{"kubelet", "admin"}, caKey, caCert)
if err != nil {
return err
}
// kubeadm is responsible for writing the following kubeconfig file, which
// kubelet should be waiting for. Help user avoid foot-shooting by refusing to
// write a file that has already been written (the kubelet will be up and
// running in that case - they'd need to stop the kubelet, remove the file, and
// start it again in that case).
// TODO(phase1+) this is no longer the right place to guard agains foo-shooting,
// we need to decide how to handle existing files (it may be handy to support
// importing existing files, may be we could even make our command idempotant,
// or at least allow for external PKI and stuff)
for name, kubeconfig := range kubeconfigs {
if err := kubeadmutil.WriteKubeconfigIfNotExists(name, kubeconfig); err != nil {
return err
}
}
client, err := kubemaster.CreateClientAndWaitForAPI(kubeconfigs["admin"])
if err != nil {
return err
}
schedulePodsOnMaster := false
if err := kubemaster.UpdateMasterRoleLabelsAndTaints(client, schedulePodsOnMaster); err != nil {
return err
}
if err := kubemaster.CreateDiscoveryDeploymentAndSecret(cfg, client, caCert); err != nil {
return err
}
if err := kubemaster.CreateEssentialAddons(cfg, client); err != nil {
return err
}
// TODO(phase1+) use templates to reference struct fields directly as order of args is fragile
fmt.Fprintf(out, initDoneMsgf,
cfg.Secrets.GivenToken,
cfg.API.AdvertiseAddresses[0],
)
return nil
}