github.com/alibaba/sealer@v0.8.6-0.20220430115802-37a2bdaa8173/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 "strconv" 20 "time" 21 22 v2 "github.com/alibaba/sealer/types/api/v2" 23 24 "github.com/alibaba/sealer/utils/ssh" 25 ) 26 27 type HostChecker struct { 28 } 29 30 func (a HostChecker) Check(cluster *v2.Cluster, phase string) error { 31 var ipList []string 32 for _, hosts := range cluster.Spec.Hosts { 33 ipList = append(ipList, hosts.IPS...) 34 } 35 36 if err := checkHostnameUnique(cluster, ipList); err != nil { 37 return err 38 } 39 return checkTimeSync(cluster, ipList) 40 } 41 42 func NewHostChecker() Interface { 43 return &HostChecker{} 44 } 45 46 func checkHostnameUnique(cluster *v2.Cluster, ipList []string) error { 47 hostnameList := map[string]bool{} 48 for _, ip := range ipList { 49 s, err := ssh.GetHostSSHClient(ip, cluster) 50 if err != nil { 51 return fmt.Errorf("checker: failed to get host %s client,%v", ip, err) 52 } 53 hostname, err := s.CmdToString(ip, "hostname", "") 54 if err != nil { 55 return fmt.Errorf("checker: failed to get host %s hostname, %v", ip, err) 56 } 57 if hostnameList[hostname] { 58 return fmt.Errorf("checker: hostname cannot be repeated, please set diffent hostname") 59 } 60 hostnameList[hostname] = true 61 } 62 return nil 63 } 64 65 //Check whether the node time is synchronized 66 func checkTimeSync(cluster *v2.Cluster, ipList []string) error { 67 for _, ip := range ipList { 68 s, err := ssh.GetHostSSHClient(ip, cluster) 69 if err != nil { 70 return fmt.Errorf("checker: failed to get host %s client,%v", ip, err) 71 } 72 timeStamp, err := s.CmdToString(ip, "date +%s", "") 73 if err != nil { 74 return fmt.Errorf("checker: failed to get %s timestamp, %v", ip, err) 75 } 76 ts, err := strconv.Atoi(timeStamp) 77 if err != nil { 78 return fmt.Errorf("checker: failed to reverse timestamp %s, %v", timeStamp, err) 79 } 80 timeDiff := time.Since(time.Unix(int64(ts), 0)).Minutes() 81 if timeDiff < -1 || timeDiff > 1 { 82 return fmt.Errorf("checker: the time of %s node is not synchronized", ip) 83 } 84 } 85 return nil 86 }