github.com/sealerio/sealer@v0.11.1-0.20240507115618-f4f89c5853ae/pkg/checker/host_checker.go (about)

     1  // Copyright © 2021 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 checker
    16  
    17  import (
    18  	"fmt"
    19  	"net"
    20  	"strconv"
    21  	"time"
    22  
    23  	v2 "github.com/sealerio/sealer/types/api/v2"
    24  
    25  	"github.com/sealerio/sealer/utils/ssh"
    26  )
    27  
    28  type HostChecker struct {
    29  }
    30  
    31  func (a HostChecker) Check(cluster *v2.Cluster, phase string) error {
    32  	var ipList []net.IP
    33  	for _, hosts := range cluster.Spec.Hosts {
    34  		ipList = append(ipList, hosts.IPS...)
    35  	}
    36  
    37  	if err := checkHostnameUnique(cluster, ipList); err != nil {
    38  		return err
    39  	}
    40  	return checkTimeSync(cluster, ipList)
    41  }
    42  
    43  func checkHostnameUnique(cluster *v2.Cluster, ipList []net.IP) error {
    44  	hostnameList := map[string]bool{}
    45  	for _, ip := range ipList {
    46  		s, err := ssh.GetHostSSHClient(ip, cluster)
    47  		if err != nil {
    48  			return fmt.Errorf("checker: failed to get ssh client of host(%s): %v", ip, err)
    49  		}
    50  		hostname, err := s.CmdToString(ip, nil, "hostname", "")
    51  		if err != nil {
    52  			return fmt.Errorf("checker: failed to get hostname of host(%s): %v", ip, err)
    53  		}
    54  		if hostnameList[hostname] {
    55  			return fmt.Errorf("checker: hostname of host(%s) cannot be repeated, please set diffent hostname", ip)
    56  		}
    57  		hostnameList[hostname] = true
    58  	}
    59  	return nil
    60  }
    61  
    62  // Check whether the node time is synchronized
    63  func checkTimeSync(cluster *v2.Cluster, ipList []net.IP) error {
    64  	for _, ip := range ipList {
    65  		s, err := ssh.GetHostSSHClient(ip, cluster)
    66  		if err != nil {
    67  			return fmt.Errorf("checker: failed to get ssh client of host(%s): %v", ip, err)
    68  		}
    69  		timeStamp, err := s.CmdToString(ip, nil, "date +%s", "")
    70  		if err != nil {
    71  			return fmt.Errorf("checker: failed to get timestamp of host(%s): %v", ip, err)
    72  		}
    73  		ts, err := strconv.Atoi(timeStamp)
    74  		if err != nil {
    75  			return fmt.Errorf("checker: failed to reverse timestamp %s of host(%s): %v", timeStamp, ip, err)
    76  		}
    77  		timeDiff := time.Since(time.Unix(int64(ts), 0)).Minutes()
    78  		if timeDiff < -1 || timeDiff > 1 {
    79  			return fmt.Errorf("checker: time of host(%s) is not synchronized", ip)
    80  		}
    81  	}
    82  	return nil
    83  }