應用升級
Kubectl set image --help 有案例指定新版本
[root@k8s-master ~]# kubectl set image deployment/nginx nginx=nginx:1.11
升級之后他會將所有版本進行替換，用describe來查看版本
[root@k8s-master ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
busybox-5d4f595646-dzjv4 1/1 Running 0 2d
nginx-76c4c6d6d8-5w825 1/1 Running 0 2m
nginx-76c4c6d6d8-bh2sm 1/1 Running 0 2m
nginx-76c4c6d6d8-cwhw5 1/1 Running 0 1m
用describe來查看版本，看到版本已經升級為1.11版本了，另外下面還有他的輸出信息
[root@k8s-master ~]# kubectl describe po/nginx-76c4c6d6d8-cwhw5
nginx:
Container ID: docker://ca046dd27d86bc10f330131be7ba5b91b14cb555c5d9677bb23f481e4e69aa67
Image: nginx:1.11
第二種修改應用版本===可以使用edit
直接進行編輯就行
[root@k8s-master ~]# kubectl edit deploy/nginx
找到image直接修改進行保存，升級之后他會將所有版本進行替換，用describe來查看版本
等啟動之后查看pod重啟新的鏡像已經運行了
[root@k8s-master ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
busybox-5d4f595646-dzjv4 1/1 Running 0 2d
nginx-7454cd89d8-fpncj 1/1 Running 0 5m
nginx-7454cd89d8-gdz8c 1/1 Running 0 4m
nginx-7454cd89d8-tlngj 1/1 Running 0 5m
用describe查看Pod鏡像信息
[root@k8s-master ~]# kubectl describe po/nginx-7454cd89d8-tlngj
nginx:
Container ID: docker://6768df2391defe44097e3ce2a857529ec614d49962181c1cf541c1bbc6dbce08
Image: nginx:1.15
用node端直接訪問查看版本
[root@k8s-node1 ~]# curl -I 10.10.10.173:88
HTTP/1.1 200 OK
Server: nginx/1.15.12
Date: Mon, 08 Jul 2019 04:23:42 GMT
查看版本升級信息
[root@k8s-master ~]# kubectl rollout history deploy/nginx
deployments "nginx"
REVISION CHANGE-CAUSE
1 <none>
2 <none>
3 <none>
記錄版本信息狀態，便於回滾
[root@k8s-master ~]# kubectl set image deployment/nginx nginx=nginx:1.16 --record
[root@k8s-master ~]# kubectl rollout history deploy/nginx
deployments "nginx"
REVISION CHANGE-CAUSE
1 <none>
2 <none>
3 <none>
4 kubectl set image deployment/nginx nginx=nginx:1.16 --record=true
進行回滾用rollout undo，默認恢復到上一個版本也就是1.15
[root@k8s-master ~]# kubectl rollout undo deploy/nginx
默認少一個3,也就是回到上次第三次版本了
[root@k8s-master ~]# kubectl rollout history deploy/nginx
deployments "nginx"
REVISION CHANGE-CAUSE
1 <none>
2 <none>
4 kubectl set image deployment/nginx nginx=nginx:1.16 --record=true
5 <none>
[root@k8s-master ~]# kubectl describe po/nginx-7454cd89d8-txjpm
Containers:
nginx:
Container ID: docker://f17b88c301d61b8c75a46cba84d97c285f5d61886c081b3cfc9c0668e5cbf4e3
Image: nginx:1.15
業務量突然增加，我們需要增加副本
[root@k8s-master ~]# kubectl scale deploy/nginx --replicas=10
deployment "nginx" scaled
[root@k8s-master ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
busybox-5d4f595646-dzjv4 1/1 Running 0 2d
nginx-7454cd89d8-4cct8 1/1 Running 0 19s
nginx-7454cd89d8-75tvg 1/1 Running 0 7m
nginx-7454cd89d8-7v5qp 1/1 Running 0 1m
nginx-7454cd89d8-dtsgq 1/1 Running 0 19s
nginx-7454cd89d8-hjcpw 1/1 Running 0 7m
nginx-7454cd89d8-mhhww 1/1 Running 0 19s
nginx-7454cd89d8-txjpm 1/1 Running 0 7m
nginx-7454cd89d8-vkmjn 1/1 Running 0 19s
nginx-7454cd89d8-z8dbn 1/1 Running 0 19s
nginx-7454cd89d8-zn8pm 1/1 Running 0 1m
業務量下降我們進行縮容
[root@k8s-master ~]# kubectl scale deploy/nginx --replicas=5
[root@k8s-master ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
busybox-5d4f595646-dzjv4 1/1 Running 0 2d
nginx-7454cd89d8-75tvg 1/1 Running 0 8m
nginx-7454cd89d8-7v5qp 1/1 Running 0 3m
nginx-7454cd89d8-hjcpw 1/1 Running 0 8m
nginx-7454cd89d8-txjpm 1/1 Running 0 8m
nginx-7454cd89d8-zn8pm 1/1 Running 0 3m
要是不需要這些資源或者換項目了
直接用delete=======刪除deploy還有service
[root@k8s-master ~]# kubectl delete deploy/nginx
deployment "nginx" deleted
[root@k8s-master ~]# kubectl delete svc/nginx-service
查看資源已經刪除
[root@k8s-master ~]# kubectl get all