kubernetes控制器-創(chuàng)新互聯(lián)
1.基礎(chǔ)
apiVersion: apps/v1
kind: Deployment
metadata:
name: myapp-deploy
namespace: default
spec:
replicas: 2
selector:
matchLabels:
app: myapp
release: dev
template:
metadata:
labels:
app: myapp
release: dev
spec:
containers:
- name: myapp-rongqi
image: ikubernetes/myapp:v12.滾動(dòng)升級(jí)
vim de.yaml #修改yaml里的鏡像版本
apiVersion: apps/v1
kind: Deployment
metadata:
name: myapp-deploy
namespace: default
spec:
replicas: 5
selector:
matchLabels:
app: myapp
release: dev
strategy:
rollingUpdate:
#設(shè)置策略為滾動(dòng)更新，還有一個(gè)重建更新，全部一起結(jié)束一起新建 不友好這里就不介紹了
maxSurge: 1
#大可超出預(yù)設(shè)值1個(gè)容器
maxUnavailable: 0
#大可有0個(gè)容器不可用 ,整體表示更新時(shí)可同時(shí)可有6個(gè)容器,必須保證有5個(gè)容器可用
template:
metadata:
labels:
app: myapp
release: dev
spec:
containers:
- name: myapp-rongqi
image: ikubernetes/myapp:v1kubectl apply -f de.yaml #用apply更新配置
[root@cs25 ~]# kubectl get pod -l app=myapp -w
NAME READY STATUS RESTARTS AGE
myapp-deploy-576d479bcc-bt7hz 1/1 Running 0 47m
myapp-deploy-576d479bcc-bzqwv 1/1 Running 0 11m
myapp-deploy-576d479bcc-hf6kb 1/1 Running 0 47m
myapp-deploy-576d479bcc-hgb6w 1/1 Running 0 11m
myapp-deploy-576d479bcc-vztqp 1/1 Running 0 11m
myapp-deploy-7f969b64fb-2frdn 0/1 Pending 0 0s
myapp-deploy-576d479bcc-vztqp 1/1 Terminating 0 12m
myapp-deploy-7f969b64fb-6lhjw 0/1 Pending 0 0s
myapp-deploy-7f969b64fb-2frdn 0/1 Pending 0 0s
myapp-deploy-7f969b64fb-6lhjw 0/1 Pending 0 0s
myapp-deploy-7f969b64fb-5ms8f 0/1 Pending 0 0s
myapp-deploy-7f969b64fb-5ms8f 0/1 Pending 0 0s
myapp-deploy-7f969b64fb-6lhjw 0/1 ContainerCreating 0 1s
myapp-deploy-7f969b64fb-2frdn 0/1 ContainerCreating 0 1s
myapp-deploy-7f969b64fb-5ms8f 0/1 ContainerCreating 0 0s
myapp-deploy-7f969b64fb-2frdn 0/1 ContainerCreating 0 35s
myapp-deploy-7f969b64fb-5ms8f 0/1 ContainerCreating 0 35s
myapp-deploy-7f969b64fb-6lhjw 0/1 ContainerCreating 0 36s
myapp-deploy-576d479bcc-vztqp 0/1 Terminating 0 12m
myapp-deploy-576d479bcc-vztqp 0/1 Terminating 0 12m
myapp-deploy-576d479bcc-vztqp 0/1 Terminating 0 12m
myapp-deploy-7f969b64fb-5ms8f 1/1 Running 0 43s
myapp-deploy-7f969b64fb-2frdn 1/1 Running 0 47s
myapp-deploy-7f969b64fb-6lhjw 1/1 Running 0 51s
myapp-deploy-576d479bcc-hgb6w 1/1 Terminating 0 13m
myapp-deploy-576d479bcc-bzqwv 1/1 Terminating 0 13m
myapp-deploy-576d479bcc-bt7hz 1/1 Terminating 0 49m
myapp-deploy-7f969b64fb-gprvk 0/1 Pending 0 0s
myapp-deploy-7f969b64fb-fwdbr 0/1 Pending 0 0s
myapp-deploy-7f969b64fb-fwdbr 0/1 Pending 0 1s
myapp-deploy-7f969b64fb-gprvk 0/1 Pending 0 1s
myapp-deploy-7f969b64fb-fwdbr 0/1 ContainerCreating 0 1s
myapp-deploy-7f969b64fb-gprvk 0/1 ContainerCreating 0 1s
myapp-deploy-576d479bcc-hgb6w 0/1 Terminating 0 13m
myapp-deploy-576d479bcc-bzqwv 0/1 Terminating 0 13m
myapp-deploy-7f969b64fb-fwdbr 0/1 ContainerCreating 0 18s
myapp-deploy-7f969b64fb-gprvk 0/1 ContainerCreating 0 19s
myapp-deploy-576d479bcc-hgb6w 0/1 Terminating 0 13m
myapp-deploy-576d479bcc-bt7hz 0/1 Terminating 0 49m
myapp-deploy-576d479bcc-bzqwv 0/1 Terminating 0 13m
myapp-deploy-7f969b64fb-gprvk 1/1 Running 0 20s
myapp-deploy-7f969b64fb-fwdbr 1/1 Running 0 20skubectl get rs -o wide #使用命令查看
可以看到當(dāng)前鏡像版本已經(jīng)換成了v2 且模板也變了，之前的v1版本還保這方便回滾，yaml文件內(nèi)容修改一次就會(huì)當(dāng)做一次更新，最后一串?dāng)?shù)字就是通過yaml文件計(jì)算出來的
注意： deployment的pod模板被更改時(shí)才會(huì)創(chuàng)建新的修訂版本，例如更新模板標(biāo)簽或者容器鏡像可以觸發(fā)滾動(dòng)更新, 其它操作例如擴(kuò)展副本數(shù)將不會(huì)觸發(fā)deployment的更新操作
金絲雀發(fā)布
kubectl set image deploy myapp-deploy myapp-rongqi=ikubernetes/myapp:v3 && kubectl rollout pause deploy myapp-deploy
#kubectl set image deploy "控制器Name" "容器name"=ikubernetes/myapp:v3 && kubectl rollout pause deploy "控制器Name"
#原理就是先升級(jí)一個(gè)容器的版本，執(zhí)行pause 暫停升級(jí)任務(wù)，待升級(jí)的那個(gè)容器經(jīng)過真實(shí)用戶測(cè)試后無錯(cuò)后解除暫停
kubectl get rs -o wide #查看控制器能看到，有1個(gè)v3版，5個(gè)v2版本，出現(xiàn)6個(gè)的原因是我滾動(dòng)策略定義了升級(jí)可允許存在6個(gè)
kubectl rollout resume deploy myapp-deploy
#解除暫停
#解除暫停后能看到，v2版本在一點(diǎn)點(diǎn)的關(guān)閉向v3版轉(zhuǎn)移，最終v2全部關(guān)閉，v3版5個(gè)容器全部正常上線
回滾
kubectl rollout history deployment/nginx-deployment
#查看升級(jí)歷史記錄
kubectl rollout history deployment/nginx-deployment --revision=2
#查看某個(gè)升級(jí)歷史記錄的的詳細(xì)信息
kubectl rollout undo deployment/nginx-deployment
#回滾到上一個(gè)版本
kubectl rollout undo deployment/nginx-deployment --to-revision=2
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