运行一个容器：
apiVersion: apps/v1
kind: Deployment
metadata:
annotations:
deployment.kubernetes.io/revision: "1"
creationTimestamp: "2020-09-19T02:41:11Z"
generation: 1
labels:
app: nginx
name: nginx
namespace: default
spec:
progressDeadlineSeconds: 600
replicas: 3 # 副本数
revisionHistoryLimit: 10 # 历史记录保留的个数
selector:
matchLabels:
app: nginx
strategy:
rollingUpdate:
maxSurge: 25%
maxUnavailable: 25%
type: RollingUpdate
template:
metadata:
creationTimestamp: null
labels:
app: nginx
spec:
containers:
- image: nginx:1.15.4
imagePullPolicy: IfNotPresent
name: nginx
resources: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
dnsPolicy: ClusterFirst
restartPolicy: Always
schedulerName: default-scheduler
securityContext: {}
terminationGracePeriodSeconds: 30
# 保存为deployment.yaml 并创建nginx pod：
[root@k8s-master01 yaml]# kubectl create -f deployment-nginx.yaml
deployment.apps/nginx created
#检查：
[root@k8s-master01 yaml]# kubectl get pod
NAME READY STATUS RESTARTS AGE
nginx-6cdd5dd489-d7kll 1/1 Running 0 17s
nginx-6cdd5dd489-dblw2 1/1 Running 0 17s
nginx-6cdd5dd489-zc8fl 1/1 Running 0 17s
#检查nginx版本：
[root@k8s-master01 yaml]# kubectl exec -it nginx-6cdd5dd489-d7kll -- sh
# nginx -v
nginx version: nginx/1.15.4
pod升级与回滚
#升级：
root@k8s-master01[11:10:24]:~/yaml$ kubectl set image deploy nginx nginx=nginx:1.15.5 --record=true
deployment.apps/nginx image updated
#检查升级过程：
kubectl describe pod nginx-7c4b6d99fd-csh5s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 76s default-scheduler Successfully assigned default/nginx-df9789dc8-6h7p7 to k8s-node02
Normal Pulling 76s kubelet Pulling image "nginx:1.15.5"
Normal Pulled 51s kubelet Successfully pulled image "nginx:1.15.5" in 24.828362289s
Normal Created 51s kubelet Created container nginx
Normal Started 51s kubelet Started container nginx
#检查现在的版本：
[root@k8s-master01 yaml]# kubectl exec -it nginx-df9789dc8-trtwq -- sh
# nginx -v
nginx version: nginx/1.15.5
#检查更新过程
kubectl rollout status deploy nginx
[root@k8s-master01 yaml]# kubectl rollout status deploy nginx
Waiting for deployment "nginx" rollout to finish: 1 out of 2 new replicas have been updated...
Waiting for deployment "nginx" rollout to finish: 1 out of 2 new replicas have been updated...
Waiting for deployment "nginx" rollout to finish: 1 out of 2 new replicas have been updated...
Waiting for deployment "nginx" rollout to finish: 1 old replicas are pending termination...
Waiting for deployment "nginx" rollout to finish: 1 old replicas are pending termination...
deployment "nginx" successfully rolled out
[root@k8s-master01 yaml]# kubectl exec -it nginx-6cdd5dd489-bsb7f -- sh
# nginx -v
nginx version: nginx/1.15.5
#为了实验效果 在升级一次
[root@k8s-master01 yaml]# kubectl set image deploy nginx nginx=nginx:1.15.6 --record=true
[root@k8s-master01 yaml]# kubectl get pod
NAME READY STATUS RESTARTS AGE
nginx-5455fbc855-64brv 1/1 Running 0 2m48s
nginx-5455fbc855-nblks 1/1 Running 0 3m16s
nginx-5455fbc855-ns4kz 1/1 Running 0 2m47s
[root@k8s-master01 yaml]# kubectl exec -it nginx-5455fbc855-64brv -- sh
# nginx -v
nginx version: nginx/1.15.6
#回滚：
1. 查看历史更新
kubectl rollout history deploy nginx
[root@k8s-master01 yaml]# kubectl rollout history deploy nginx
deployment.apps/nginx
REVISION CHANGE-CAUSE
1 <none>
2 kubectl set image deploy nginx nginx=nginx:1.15.5 --record=true
3 kubectl set image deploy nginx nginx=nginx:1.15.6 --record=true
2. 回滚到上一个版本[kubectl rollout undo deploy {name} ]
[root@k8s-master01 yaml]# kubectl rollout undo deploy nginx
deployment.apps/nginx rolled back
3. 检查回滚状态：
[root@k8s-master01 yaml]# kubectl get pod
NAME READY STATUS RESTARTS AGE
nginx-6cdd5dd489-bzdgd 1/1 Running 0 21s
nginx-6cdd5dd489-cwxv5 1/1 Running 0 22s
nginx-6cdd5dd489-xb6xj 1/1 Running 0 20s
3.1 进入容器检查：
[root@k8s-master01 yaml]# kubectl exec -it nginx-6cdd5dd489-bzdgd -- sh
# nginx -v
nginx version: nginx/1.15.4
4. 回滚到指定版本
[root@k8s-master01 yaml]# kubectl rollout history deploy nginx
deployment.apps/nginx
REVISION CHANGE-CAUSE
1 kubectl set image deploy nginx nginx=nginx:1.15.5 --record=true
2 kubectl set image deploy nginx nginx=nginx:1.15.6 --record=true
# 查看指定版本信息
kubectl rollout history deploy nginx --revision=1
#回滚到指定版本
kubectl rollout undo deploy nginx --to-revision=1
[root@k8s-master01 yaml]# kubectl exec -it nginx-6cdd5dd489-q44cr -- sh
# nginx -v
nginx version: nginx/1.15.5
pod扩容，缩容
[root@k8s-master01 yaml]# kubectl get pod
NAME READY STATUS RESTARTS AGE
nginx-df9789dc8-gqk5j 1/1 Running 0 11m
nginx-df9789dc8-vhqkd 1/1 Running 0 11m
#修改资源：
[root@k8s-master01 yaml]# kubectl edit deploy nginx
deployment.apps/nginx edited
找到： replicas: 2
改为： replicas: 3
#检查状态：
[root@k8s-master01 yaml]# kubectl get pod
NAME READY STATUS RESTARTS AGE
nginx-df9789dc8-c47mc 1/1 Running 0 3s
nginx-df9789dc8-gqk5j 1/1 Running 0 11m
nginx-df9789dc8-vhqkd 1/1 Running 0 11m
#缩容就是继续把 replicas: 3 改为： replicas: 2即可：
[root@k8s-master01 yaml]# kubectl get pod
NAME READY STATUS RESTARTS AGE
nginx-df9789dc8-gqk5j 1/1 Running 0 13m
nginx-df9789dc8-vhqkd 1/1 Running 0 13m