| 命令 |
解释 |
| kubectl scale |
实现水平扩展或收缩 |
| kubectl rollout status |
部署状态变更，状态检查 |
| kubectl rollout history |
部署的历史 |
| kubectl rollout undo |
回滚部署到最近或者某个版本 |
实际操作：
1. 执行命令: kubectl scale deployment nginx --replicas=3
deployment.extensions/nginx scaled
2.执行命令:kubectl get deployments
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
nginx 3 3 3 3 50m
3.kubectl describe rs nginx-65899c769f
Name: nginx-65899c769f
Namespace: default
Selector: pod-template-hash=2145573259,run=nginx
Labels: pod-template-hash=2145573259
run=nginx
Annotations: deployment.kubernetes.io/desired-replicas: 3
deployment.kubernetes.io/max-replicas: 4
deployment.kubernetes.io/revision: 1
Controlled By: Deployment/nginx
Replicas: 3 current / 3 desired
Pods Status: 3 Running / 0 Waiting / 0 Succeeded / 0 Failed
Pod Template:
Labels: pod-template-hash=2145573259
run=nginx
Containers:
nginx:
Image: nginx
Port: <none>
Host Port: <none>
Environment: <none>
Mounts: <none>
Volumes: <none>
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal SuccessfulCreate 51m replicaset-controller Created pod: nginx-65899c769f-qjlfj
Normal SuccessfulCreate 2m6s replicaset-controller Created pod: nginx-65899c769f-qptcl
Normal SuccessfulCreate 2m6s replicaset-controller Created pod: nginx-65899c769f-6pzwn
4. kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-65899c769f-6pzwn 1/1 Running 0 3m
nginx-65899c769f-qjlfj 1/1 Running 0 52m
nginx-65899c769f-qptcl 1/1 Running 0 3m
5.kubectl describe services nginx
Name: nginx
Namespace: default
Labels: app=nginx
Annotations: <none>
Selector: run=nginx
Type: NodePort
IP: 10.102.111.71
Port: http 8888/TCP
TargetPort: 80/TCP
NodePort: http 30001/TCP
Endpoints: 172.17.0.5:80,172.17.0.6:80,172.17.0.7:80
Session Affinity: None
External Traffic Policy: Cluster
Events: <none>
5.kubectl get endpoints
NAME ENDPOINTS AGE
kubernetes 192.168.99.100:8443 23h
nginx 172.17.0.5:80,172.17.0.6:80,172.17.0.7:80 20m
nginx-wls 172.17.0.5:80,172.17.0.6:80,172.17.0.7:80 9m
6. kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-65899c769f-6pzwn 0/1 Terminating 0 6m
nginx-65899c769f-qjlfj 1/1 Running 0 56m
nginx-65899c769f-qptcl 1/1 Running 0 6m
[root@wls yaml]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-65899c769f-qjlfj 1/1 Running 0 56m
nginx-65899c769f-qptcl 1/1 Running 0 6m
7. kubectl set image deploy nginx nginx=nginx:1.9.1
deployment.extensions/nginx image updated
8. kubectl rollout history deployment nginx
deployment.extensions/nginx
REVISION CHANGE-CAUSE
1 <none>
2 <none>
9.kubectl describe deployments nginx
Name: nginx
Namespace: default
CreationTimestamp: Sun, 28 Oct 2018 21:46:00 +0800
Labels: run=nginx
Annotations: deployment.kubernetes.io/revision: 2
Selector: run=nginx
Replicas: 2 desired | 2 updated | 2 total | 2 available | 0 unavailable
StrategyType: RollingUpdate
MinReadySeconds: 0
RollingUpdateStrategy: 25% max unavailable, 25% max surge
Pod Template:
Labels: run=nginx
Containers:
nginx:
Image: nginx:1.9.1
Port: <none>
Host Port: <none>
Environment: <none>
Mounts: <none>
Volumes: <none>
Conditions:
Type Status Reason
---- ------ ------
Available True MinimumReplicasAvailable
Progressing True NewReplicaSetAvailable
OldReplicaSets: <none>
NewReplicaSet: nginx-76bc854778 (2/2 replicas created)
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal ScalingReplicaSet 11m deployment-controller Scaled up replica set nginx-65899c769f to 3
Normal ScalingReplicaSet 5m19s deployment-controller Scaled down replica set nginx-65899c769f to 2
Normal ScalingReplicaSet 70s deployment-controller Scaled up replica set nginx-76bc854778 to 1
Normal ScalingReplicaSet 30s deployment-controller Scaled down replica set nginx-65899c769f to 1
Normal ScalingReplicaSet 30s deployment-controller Scaled up replica set nginx-76bc854778 to 2
Normal ScalingReplicaSet 24s deployment-controller Scaled down replica set nginx-65899c769f to 0
11. kubectl rollout undo deployment nginx 回滚
deployment.extensions/nginx
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