Docker Kubernetes 容器更新與回滾
阿新 • • 發佈:2018-11-24
Docker Kubernetes 容器更新與回滾
環境:
- 系統:Centos 7.4 x64
- Docker版本:18.09.0
- Kubernetes版本:v1.8
- 管理節點:192.168.1.79
- 工作節點:192.168.1.78
- 工作節點:192.168.1.77
建立環境:
- 1、Deployment名稱:nginx-deployment
- 2、pods副本數為:3
- 3、image映象:nginx1.9
更新升級
方案一:管理節點:滾動升級映象。
kubectl set image deployment nginx-deployment nginx=nginx:1.11
kubectl set image 資源型別/資源名稱 容器名稱=映象版本命令註解
方案二:管理節點:修改原yaml配置檔案重新載入完成滾動升級
kubectl apply -f nginx-deployment.yaml
管理節點:檢視升級情況
命令:kubectl describe deployment nginx-deployment # 映象已更新 Image: nginx:1.11 Type Reason Age From Message檢視deployment映象升級描述資訊---- ------ ---- ---- ------- # 擴容版本 Normal ScalingReplicaSet 24m deployment-controller Scaled up replica set nginx-deployment-845cfc7fb9 to 3 Normal ScalingReplicaSet 49s deployment-controller Scaled up replica set nginx-deployment-7ff5df4cfb to 1 # 縮容版本Normal ScalingReplicaSet 34s deployment-controller Scaled down replica set nginx-deployment-845cfc7fb9 to 2 # 擴容版本 Normal ScalingReplicaSet 34s deployment-controller Scaled up replica set nginx-deployment-7ff5df4cfb to 2 # 縮容版本 Normal ScalingReplicaSet 18s deployment-controller Scaled down replica set nginx-deployment-845cfc7fb9 to 1 # 擴容版本 Normal ScalingReplicaSet 18s deployment-controller Scaled up replica set nginx-deployment-7ff5df4cfb to 3 # 縮容版本 Normal ScalingReplicaSet 15s deployment-controller Scaled down replica set nginx-deployment-845cfc7fb9 to 0
命令:kubectl rollout status deployment/nginx-deployment Waiting for rollout to finish: 1 out of 3 new replicas have been updated... Waiting for rollout to finish: 1 out of 3 new replicas have been updated... Waiting for rollout to finish: 1 out of 3 new replicas have been updated... Waiting for rollout to finish: 2 out of 3 new replicas have been updated... Waiting for rollout to finish: 2 out of 3 new replicas have been updated... Waiting for rollout to finish: 2 out of 3 new replicas have been updated... Waiting for rollout to finish: 1 old replicas are pending termination... Waiting for rollout to finish: 1 old replicas are pending termination... deployment "nginx-deployment" successfully rolled out實時觀察釋出狀態:
命令:kubectl rollout history deployment/nginx-deployment deployments "nginx-deployment" REVISION CHANGE-CAUSE 1 <none> 2 <none>檢視deployment歷史修訂版本
命令:kubectl rollout history deployment/nginx-deployment --revision=1 deployments "nginx-deployment" with revision #1 Pod Template: Labels: app=nginx pod-template-hash=4017973965 Containers: nginx: Image: nginx:1.10 Port: 80/TCP Environment: <none> Mounts: <none> Volumes: <none>檢視指定歷史修訂版本
版本回滾
管理節點:回滾到上一個版本
kubectl rollout undo deployment nginx-deployment
kubectl rollout undo 資源型別 資源名稱命令註解
管理節點:指定版本回滾
kubectl rollout undo deployment/nginx-deployment --to-revision=3
kubectl rollout undo 資源型別 資源名稱 --to-revision=版本號
注:kubectl rollout history 資源型別 資源名稱 檢視的版本號。
命令註解
管理節點:查看回滾情況
命令:kubectl rollout history deployment/nginx-deployment deployments "nginx-deployment" REVISION CHANGE-CAUSE 1 <none> 2 <none> 4 <none> 5 <none> 注:將還原版本覆蓋,並生成新的版本號。檢視deployment歷史修訂版本