github.com/sealerio/sealer@v0.11.1-0.20240507115618-f4f89c5853ae/pkg/runtime/k0s/join_masters.go (about)

     1  // Copyright © 2022 Alibaba Group Holding Ltd.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package k0s
    16  
    17  import (
    18  	"fmt"
    19  	"net"
    20  	"time"
    21  
    22  	"github.com/pkg/errors"
    23  	"github.com/sirupsen/logrus"
    24  )
    25  
    26  const TimeForWaitingK0sStart = 10
    27  
    28  func (k *Runtime) joinMasters(masters []net.IP, registryInfo string) error {
    29  	if len(masters) == 0 {
    30  		return nil
    31  	}
    32  
    33  	if err := k.initKube(masters); err != nil {
    34  		return err
    35  	}
    36  
    37  	if err := k.WaitSSHReady(6, masters...); err != nil {
    38  		return errors.Wrap(err, "join masters wait for ssh ready time out")
    39  	}
    40  	/**To join a node, following these steps.
    41  	STEP1: send private registry cert and add registry info into node
    42  	STEP2: copy k0s join token
    43  	STEP3: use k0s command to join node with master role.
    44  	STEP4: k0s create default config
    45  	STEP5: modify the private image repository field and so on in k0s config
    46  	STEP6: join node with token
    47  	STEP7: start the k0scontroller.service
    48  	*/
    49  	if err := k.CopyJoinToken(ControllerRole, masters); err != nil {
    50  		return err
    51  	}
    52  	cmds := k.JoinCommand(ControllerRole, registryInfo)
    53  	if cmds == nil {
    54  		return fmt.Errorf("failed to get join master command")
    55  	}
    56  
    57  	for _, master := range masters {
    58  		logrus.Infof("Start to join %s as master", master)
    59  		if err := k.infra.CmdAsync(master, nil, cmds...); err != nil {
    60  			return fmt.Errorf("failed to exec command(%s) on master(%s): %v", cmds, master, err)
    61  		}
    62  		if err := k.fetchKubeconfig(master); err != nil {
    63  			return fmt.Errorf("failed to fetch admin.conf on master(%s): %v", master, err)
    64  		}
    65  		logrus.Infof("Succeeded in joining %s as master", master)
    66  	}
    67  	return nil
    68  }
    69  
    70  func (k *Runtime) fetchKubeconfig(m net.IP) error {
    71  	logrus.Infof("waiting around 10 seconds for fetch k0s admin.conf")
    72  	// waiting k0s start success.
    73  	time.Sleep(time.Second * TimeForWaitingK0sStart)
    74  	if err := k.infra.CmdAsync(m, nil, "rm -rf .kube/config && mkdir -p /root/.kube && cp /var/lib/k0s/pki/admin.conf /root/.kube/config"); err != nil {
    75  		return err
    76  	}
    77  	return nil
    78  }