Exemplo n.º 1
0
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
}
Exemplo n.º 2
0
// 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
}