mirror of
https://github.com/k3s-io/kubernetes.git
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92 lines
2.5 KiB
Go
92 lines
2.5 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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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 cmd
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import (
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"fmt"
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"io"
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"github.com/renstrom/dedent"
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"github.com/spf13/cobra"
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kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/api"
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kubenode "k8s.io/kubernetes/cmd/kubeadm/app/node"
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kubeadmutil "k8s.io/kubernetes/cmd/kubeadm/app/util"
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cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
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)
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var (
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joinDoneMsgf = dedent.Dedent(`
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Node join complete:
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* Certificate signing request sent to master and response
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received.
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* Kubelet informed of new secure connection details.
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Run 'kubectl get nodes' on the master to see this machine join.
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`)
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)
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// NewCmdJoin returns "kubeadm join" command.
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func NewCmdJoin(out io.Writer) *cobra.Command {
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cfg := &kubeadmapi.NodeConfiguration{}
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cmd := &cobra.Command{
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Use: "join",
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Short: "Run this on any machine you wish to join an existing cluster.",
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Run: func(cmd *cobra.Command, args []string) {
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err := RunJoin(out, cmd, args, cfg)
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cmdutil.CheckErr(err)
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},
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}
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cmd.PersistentFlags().StringVar(
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&cfg.Secrets.GivenToken, "token", "",
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"(required) Shared secret used to secure bootstrap. Must match the output of 'kubeadm init'",
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)
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return cmd
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}
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// RunJoin executes worked node provisioning and tries to join an existing cluster.
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func RunJoin(out io.Writer, cmd *cobra.Command, args []string, s *kubeadmapi.NodeConfiguration) error {
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// TODO(phase1+) this we are missing args from the help text, there should be a way to tell cobra about it
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if len(args) == 0 {
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return fmt.Errorf("<cmd/join> must specify master IP address (see --help)")
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}
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s.MasterAddresses = append(s.MasterAddresses, args...)
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ok, err := kubeadmutil.UseGivenTokenIfValid(&s.Secrets)
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if !ok {
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if err != nil {
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return fmt.Errorf("<cmd/join> %v (see --help)\n", err)
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}
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return fmt.Errorf("Must specify --token (see --help)\n")
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}
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kubeconfig, err := kubenode.RetrieveTrustedClusterInfo(s)
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if err != nil {
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return err
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}
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err = kubeadmutil.WriteKubeconfigIfNotExists("kubelet", kubeconfig)
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if err != nil {
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return err
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}
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fmt.Fprintf(out, joinDoneMsgf)
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return nil
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}
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