目录
一、Deployment滚动更新
1、更新配置清单
# 滚动更新：先生成新pod，后删除旧pod
[root@k8s-m-01 k8s]# vim deploy-nginx.yml
kind: Deployment
apiVersion: apps/v1
metadata:
name: test1-deploy
spec:
selector:
matchLabels:
app: deployment
template:
metadata:
labels:
app: deployment
spec:
containers:
- name: nginx
image: nginx
[root@k8s-m-01 k8s]# kubectl get pods
NAME READY STATUS RESTARTS AGE
test1-deploy-549486578f-xntvw 1/1 Running 0 5m36s
[root@k8s-m-01 k8s]# vim deploy-nginx.yml
... ...
containers:
- name: nginx
image: nginx:1.18 #修改版本1.18
[root@k8s-m-01 k8s]# kubectl apply -f deploy-nginx.yml
deployment.apps/test1-deploy unchanged
[root@k8s-m-01 k8s]# kubectl get pods
NAME READY STATUS RESTARTS AGE
test1-deploy-c7779f765-gxgp5 1/1 Running 0 8m13s
2、设置镜像 kubectl set image
[root@k8s-m-01 k8s]# kubectl set image deployment/test1-deploy nginx=nginx:latest
[root@k8s-m-01 k8s]# kubectl set image deployment/test1-deploy nginx=nginx:latest
deployment.apps/test1-deploy image updated
[root@k8s-m-01 k8s]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE
test1-deploy-76684b764-htc9n 1/1 Running 0 26s 10.244.2.100 k8s-n-02 <none> <none> #名字不一样了，已更新
3、打标签 kubectl patch
[root@k8s-m-01 k8s]# kubectl patch deployments.apps test1-deploy -p '{"spec":{"template":{"spec":{"containers":[{"name":"nginx","image":"nginx:1.18"}]}}}}'
deployment.apps/test1-deploy patched
[root@k8s-m-01 k8s]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP
test1-deploy-76684b764-htc9n 0/1 Terminating 0 9m1s 10.244.2.100 k8s-n-02 <none> <none> #旧的即将删除
test1-deploy-c7779f765-xsbf8 1/1 Running 0 24s 10.244.2.101 k8s-n-02 <none> <none>
4、修改资源 kubectl edit
[root@k8s-m-01 k8s]# kubectl edit deployments.apps test1-deploy
... ...template:
metadata:
creationTimestamp: null
labels:
app: deployment
spec:
containers:
- image: nginx:latest #修改成需要的版本
imagePullPolicy: Always
name: nginx
resources: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
dnsPolicy: ClusterFirst
[root@k8s-m-01 k8s]# kubectl edit deployments.apps test1-deploy
deployment.apps/test1-deploy edited
[root@k8s-m-01 k8s]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP
test1-deploy-76684b764-zwmx2 1/1 Running 0 2m49s 10.244.2.102 k8s-n-02 <none> <none>
二、Deployment应用回滚
1、查看更新的版本
#为了实验清楚，先删掉
[root@k8s-m-01 k8s]# kubectl delete -f /k8s/deploy-nginx.yml
deployment.apps "test1-deploy" deleted
#再去创建，当前是1.18版本
[root@k8s-m-01 k8s]# kubectl apply -f deploy-nginx.yml
deployment.apps/test1-deploy created
#去更新版本
[root@k8s-m-01 k8s]# kubectl patch deployments.apps test1-deploy -p '{"spec":{"template":{"spec":{"containers":[{"name":"nginx","image":"nginx:latest"}]}}}}'
deployment.apps/test1-deploy patched
#再进行更新
[root@k8s-m-01 k8s]# kubectl patch deployments.apps test1-deploy -p '{"spec":{"template":{"spec":{"containers":[{"name":"nginx","image":"nginx:1.19"}]}}}}'
deployment.apps/test1-deploy patched
#查看更新的版本
[root@k8s-m-01 k8s]# kubectl rollout history deployment test1-deploy
deployment.apps/test1-deploy
REVISION CHANGE-CAUSE
1 <none>
2 <none>
3 <none> #共3个版本
2、根据版本回滚
2种方式
1、回滚到上一个版本
[root@k8s-m-01 k8s]# kubectl rollout undo deployment test1-deploy
deployment.apps/test1-deploy rolled back
[root@k8s-m-01 k8s]# kubectl rollout history deployment test1-deploy
deployment.apps/test1-deploy
REVISION CHANGE-CAUSE
1 <none>
3 <none>
4 <none> #回滚后，会变成上面的2版本，而重新生成一个4版本
#再来回滚一次
[root@k8s-m-01 k8s]# kubectl rollout undo deployment test1-deploy
deployment.apps/test1-deploy rolled back
[root@k8s-m-01 k8s]# kubectl rollout history deployment test1-deploy
deployment.apps/test1-deploy
REVISION CHANGE-CAUSE
1 <none>
4 <none>
5 <none>
2、回滚到指定版本
[root@k8s-m-01 k8s]# kubectl rollout undo deployment test1-deploy --to-revision=1
deployment.apps/test1-deploy rolled back
[root@k8s-m-01 k8s]# kubectl rollout history deployment test1-deploy
deployment.apps/test1-deploy
REVISION CHANGE-CAUSE
4 <none>
5 <none>
6 <none> #6=1
三、Deployment弹性扩容
1、编辑资源
[root@k8s-m-01 k8s]# kubectl edit deployments.apps test1-deploy
... ...spec:
progressDeadlineSeconds: 600
replicas: 1 #修改成2
revisionHistoryLimit: 10
selector:
matchLabels:
app: deployment
strategy:
rollingUpdate:
maxSurge: 25%
maxUnavailable: 25%
type: RollingUpdate
... ...
[root@k8s-m-01 k8s]# kubectl edit deployments.apps test1-deploy
deployment.apps/test1-deploy edited
[root@k8s-m-01 k8s]# kubectl get pods
NAME READY STATUS RESTARTS
test1-deploy-776d6f99f5-87fvz 1/1 Running 0 3m59s
test1-deploy-776d6f99f5-fjq5k 1/1 Running 0 36s
2、打标签
[root@k8s-m-01 k8s]# kubectl patch deployments.apps test1-deploy -p '{"spec":{"replicas":1}}'
deployment.apps/test1-deploy patched
[root@k8s-m-01 k8s]# kubectl get pods
NAME READY STATUS RESTARTS
test1-deploy-776d6f99f5-87fvz 1/1 Running 0 8m3s #此时缩容成1个
3、scale
[root@k8s-m-01 k8s]# kubectl scale deployment test1-deploy --replicas=3
deployment.apps/test1-deploy scaled
[root@k8s-m-01 k8s]# kubectl get pods
NAME READY STATUS RESTARTS
test1-deploy-776d6f99f5-669qf 1/1 Running 0 7s
test1-deploy-776d6f99f5-87fvz 1/1 Running 0 10m
test1-deploy-776d6f99f5-fg72r 1/1 Running 0 7s