github.com/sealerio/sealer@v0.11.1-0.20240507115618-f4f89c5853ae/pkg/runtime/k0s/delete_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  	"context"
    19  	"fmt"
    20  	"net"
    21  
    22  	"github.com/sirupsen/logrus"
    23  	"golang.org/x/sync/errgroup"
    24  )
    25  
    26  func (k *Runtime) deleteMasters(mastersToDelete, remainMasters []net.IP) error {
    27  	var remainMaster0 *net.IP
    28  	if len(remainMasters) > 0 {
    29  		remainMaster0 = &remainMasters[0]
    30  		logrus.Infof("Master changed, remain master0 is: %s", remainMaster0)
    31  	}
    32  
    33  	eg, _ := errgroup.WithContext(context.Background())
    34  	for _, m := range mastersToDelete {
    35  		master := m
    36  		eg.Go(func() error {
    37  			logrus.Infof("Start to delete master %s", master)
    38  			if err := k.deleteMaster(master); err != nil {
    39  				return fmt.Errorf("failed to delete master %s: %v", master, err)
    40  			}
    41  			logrus.Infof("Succeeded in deleting master %s", master)
    42  			return nil
    43  		})
    44  	}
    45  	return eg.Wait()
    46  }
    47  
    48  func (k *Runtime) deleteMaster(master net.IP) error {
    49  	/** To delete a node from k0s cluster, following these steps.
    50  	STEP1: stop k0s service
    51  	STEP2: reset the node with install configuration
    52  	STEP3: remove k0s cluster config generate by k0s under /etc/k0s
    53  	STEP4: remove private registry config in /etc/host
    54  	STEP5: remove bin file such as: kubectl, and remove .kube directory
    55  	STEP6: remove k0s bin file
    56  	STEP7: no need to delete node though k8s client, cause k0s don't show master node in k8s cluster
    57  	*/
    58  	remoteCleanCmd := []string{"k0s stop",
    59  		"k0s reset",
    60  		"rm -rf /etc/k0s/",
    61  		"rm -rf /usr/bin/kube* && rm -rf ~/.kube/",
    62  		"rm -rf /usr/bin/k0s"}
    63  	if err := k.infra.CmdAsync(master, nil, remoteCleanCmd...); err != nil {
    64  		return err
    65  	}
    66  	return nil
    67  }