先写了个简单的应用部署，副本设置为5 [fencatn@k8s-master ~]$ cat nginx.yml --- apiVersion: extensions/v1beta1 kind: Deployment metadata: name: nginx-deployment spec: replicas: 5 template: metadata: labels: app: web_server spec: containers: - name: nginx image: nginx:1.7.9 [fencatn@k8s-master ~]$
然后开始部署应用 [fencatn@k8s-master ~]$ kubectl apply -f nginx.yml deployment.extensions/nginx-deployment configured [fencatn@k8s-master ~]$ kubectl get pod NAME READY STATUS RESTARTS AGE http-app-5b7568bf86-bnszg 1/1 Running 0 106m http-app-5b7568bf86-vwtl6 1/1 Running 0 106m myjob-2q7tk 0/1 Completed 0 52d myjob-4gbwc 0/1 Completed 0 52d myjob-bpw87 0/1 Completed 0 52d myjob-lmbbv 0/1 Completed 0 52d myjob-s6s7j 0/1 Completed 0 52d myjob-zz9fx 0/1 Completed 0 52d nginx-deployment-656d6ccbd5-2nc6m 1/1 Running 0 3s nginx-deployment-656d6ccbd5-hr5ff 1/1 Running 0 98s nginx-deployment-656d6ccbd5-k8lbj 1/1 Running 0 98s nginx-deployment-656d6ccbd5-rmkz6 1/1 Running 0 3s nginx-deployment-656d6ccbd5-sd4ss 1/1 Running 0 98s
查看详细属性 [fencatn@k8s-master ~]$ kubectl get pod -o wide NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES http-app-5b7568bf86-bnszg 1/1 Running 0 111m 10.244.1.20 k8s-node1 <none> <none> http-app-5b7568bf86-vwtl6 1/1 Running 0 111m 10.244.3.14 k8s-node3 <none> <none> myjob-2q7tk 0/1 Completed 0 52d 10.244.2.11 k8s-node2 <none> <none> myjob-4gbwc 0/1 Completed 0 52d 10.244.3.12 k8s-node3 <none> <none> myjob-bpw87 0/1 Completed 0 52d 10.244.3.13 k8s-node3 <none> <none> myjob-lmbbv 0/1 Completed 0 52d 10.244.1.19 k8s-node1 <none> <none> myjob-s6s7j 0/1 Completed 0 52d 10.244.2.12 k8s-node2 <none> <none> myjob-zz9fx 0/1 Completed 0 52d 10.244.1.18 k8s-node1 <none> <none> nginx-deployment-656d6ccbd5-2nc6m 1/1 Running 0 5m43s 10.244.1.24 k8s-node1 <none> <none> nginx-deployment-656d6ccbd5-hr5ff 1/1 Running 0 7m18s 10.244.1.23 k8s-node1 <none> <none> nginx-deployment-656d6ccbd5-k8lbj 1/1 Running 0 7m18s 10.244.3.17 k8s-node3 <none> <none> nginx-deployment-656d6ccbd5-rmkz6 1/1 Running 0 5m43s 10.244.2.16 k8s-node2 <none> <none> nginx-deployment-656d6ccbd5-sd4ss 1/1 Running 0 7m18s 10.244.2.15 k8s-node2 <none> <none>
过了一会 [fencatn@k8s-master ~]$ kubectl get pod -o wide NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES http-app-5b7568bf86-bnszg 1/1 Running 0 113m 10.244.1.20 k8s-node1 <none> <none> http-app-5b7568bf86-vwtl6 1/1 Running 0 113m 10.244.3.14 k8s-node3 <none> <none> myjob-4gbwc 0/1 Completed 0 52d 10.244.3.12 k8s-node3 <none> <none> myjob-bpw87 0/1 Completed 0 52d 10.244.3.13 k8s-node3 <none> <none> myjob-lmbbv 0/1 Completed 0 52d 10.244.1.19 k8s-node1 <none> <none> myjob-zz9fx 0/1 Completed 0 52d 10.244.1.18 k8s-node1 <none> <none> nginx-deployment-656d6ccbd5-2nc6m 1/1 Running 0 7m11s 10.244.1.24 k8s-node1 <none> <none> nginx-deployment-656d6ccbd5-8ckzb 1/1 Running 0 18s 10.244.3.18 k8s-node3 <none> <none> nginx-deployment-656d6ccbd5-hr5ff 1/1 Running 0 8m46s 10.244.1.23 k8s-node1 <none> <none> nginx-deployment-656d6ccbd5-j88pc 1/1 Running 0 18s 10.244.1.25 k8s-node1 <none> <none> nginx-deployment-656d6ccbd5-k8lbj 1/1 Running 0 8m46s 10.244.3.17 k8s-node3 <none> <none> nginx-deployment-656d6ccbd5-rmkz6 1/1 Terminating 0 7m11s 10.244.2.16 k8s-node2 <none> <none> nginx-deployment-656d6ccbd5-sd4ss 1/1 Terminating 0 8m46s 10.244.2.15 k8s-node2 <none> <none>
同时确认node2下线 [fencatn@k8s-master ~]$ kubectl get node NAME STATUS ROLES AGE VERSION k8s-master Ready master 52d v1.14.2 k8s-node1 Ready <none> 52d v1.14.2 k8s-node2 NotReady <none> 52d v1.14.2 k8s-node3 Ready <none> 52d v1.14.2
Node2重新开机 [fencatn@k8s-master ~]$ kubectl get node NAME STATUS ROLES AGE VERSION k8s-master Ready master 52d v1.14.2 k8s-node1 Ready <none> 52d v1.14.2 k8s-node2 Ready <none> 52d v1.14.2 k8s-node3 Ready <none> 52d v1.14.2
再次查看pod，可以发现原来状态为terminating的pod已经删除，但是已有的pod不会重新调度回去 [fencatn@k8s-master ~]$ kubectl get pod -o wide NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES http-app-5b7568bf86-bnszg 1/1 Running 0 115m 10.244.1.20 k8s-node1 <none> <none> http-app-5b7568bf86-vwtl6 1/1 Running 0 115m 10.244.3.14 k8s-node3 <none> <none> myjob-4gbwc 0/1 Completed 0 52d 10.244.3.12 k8s-node3 <none> <none> myjob-bpw87 0/1 Completed 0 52d 10.244.3.13 k8s-node3 <none> <none> myjob-lmbbv 0/1 Completed 0 52d 10.244.1.19 k8s-node1 <none> <none> myjob-zz9fx 0/1 Completed 0 52d 10.244.1.18 k8s-node1 <none> <none> nginx-deployment-656d6ccbd5-2nc6m 1/1 Running 0 9m47s 10.244.1.24 k8s-node1 <none> <none> nginx-deployment-656d6ccbd5-8ckzb 1/1 Running 0 2m54s 10.244.3.18 k8s-node3 <none> <none> nginx-deployment-656d6ccbd5-hr5ff 1/1 Running 0 11m 10.244.1.23 k8s-node1 <none> <none> nginx-deployment-656d6ccbd5-j88pc 1/1 Running 0 2m54s 10.244.1.25 k8s-node1 <none> <none> nginx-deployment-656d6ccbd5-k8lbj 1/1 Running 0 11m 10.244.3.17 k8s-node3 <none> <none>