一、滾動更新
1、將myapp控制器下的pod資源鏡像升級為："ikubernetes/myapp:v6"
[root@master ~]# kubectl set image sts myapp myapp=ikubernetes/myapp:v6 statefulset.apps/myapp image updated
2、實時監控更新操作過程
[root@master chapter9]# kubectl get pods -l app=myapp-pod -w NAME READY STATUS RESTARTS AGE myapp-0 1/1 Running 0 39s myapp-1 1/1 Running 0 36s myapp-2 1/1 Running 0 34s myapp-2 1/1 Terminating 0 38s myapp-2 0/1 Terminating 0 40s myapp-2 0/1 Terminating 0 49s myapp-2 0/1 Terminating 0 49s myapp-2 0/1 Pending 0 0s myapp-2 0/1 Pending 0 0s myapp-2 0/1 ContainerCreating 0 0s myapp-2 1/1 Running 0 2s myapp-1 1/1 Terminating 0 53s myapp-1 0/1 Terminating 0 55s myapp-1 0/1 Terminating 0 56s myapp-1 0/1 Terminating 0 56s myapp-1 0/1 Pending 0 0s myapp-1 0/1 Pending 0 0s myapp-1 0/1 ContainerCreating 0 0s myapp-1 1/1 Running 0 2s myapp-0 1/1 Terminating 0 61s myapp-0 0/1 Terminating 0 62s myapp-0 0/1 Terminating 0 63s myapp-0 0/1 Terminating 0 63s myapp-0 0/1 Pending 0 0s myapp-0 0/1 Pending 0 0s myapp-0 0/1 ContainerCreating 0 0s myapp-0 1/1 Running 0 3s
3、驗證更新是否生效
[root@master ~]# for i in 0 1 2; do kubectl get po myapp-$i --template '{{range $i,$c := .spec.containers}}{{$c.image}}{{end}}';echo; done
ikubernetes/myapp:v6
ikubernetes/myapp:v6
ikubernetes/myapp:v6
另外、用戶也可使用""命令跟蹤statefulset資源滾動更新過程中的狀態信息
二、暫存更新操作
1、暫存更新
[root@master ~]# kubectl patch statefulset myapp -p '{"spec":{"updateStrategy":{"rollingUpdate":{"partition":3}}}}'
statefulset.apps/myapp patched
2、而后、更新myapp控制器的pod資源鏡像版本更新為："ikubernetes/myapp:v7"
[root@master ~]# kubectl set image sts myapp myapp=ikubernetes/myapp:v7 statefulset.apps/myapp image updated
3、接着檢測各POD資源的鏡像文件版本信息、可以發現其版本並為發生改變
[root@master ~]# for i in 0 1 2; do kubectl get po myapp-$i --template '{{range $i,$c := .spec.containers}}{{$c.image}}{{end}}';echo; done
ikubernetes/myapp:v6
ikubernetes/myapp:v6
ikubernetes/myapp:v6
刪除了pod對象myapp-1、隨后待其重建操作啟動后、再獲取與其相關的鏡像信息、結果依然顯示了舊的版本
[root@master ~]# kubectl delete pod myapp-1 pod "myapp-1" deleted [root@master ~]# kubectl get pods myapp-1 -o custom-columns=NAME:metadata.name,IMAGE:spec.containers[0].image NAME IMAGE myapp-1 ikubernetes/myapp:v6
由此可見、暫存狀態的更新操作對所有的pod資源均不產生影響
三、金絲雀部署
1、更新分區myapp-2 的鏡像為："ikubernetes/myapp:v7"
[root@master ~]# kubectl patch statefulset myapp -p '{"spec":{"updateStrategy":{"rollingUpdate":{"partition":2}}}}'
statefulset.apps/myapp patched
2、驗證版本是否生效
[root@master ~]# kubectl get pods -l app=myapp-pod -o custom-columns=NAME:metadata.name,IMAGE:spec.containers[0].image NAME IMAGE myapp-0 ikubernetes/myapp:v6 myapp-1 ikubernetes/myapp:v6 myapp-2 ikubernetes/myapp:v7