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k8s-deployment:应用生命周期管理流程

时间:2024-07-22 15:20:21浏览次数:14  
标签:kubectl 生命周期 Running web1 778dcf88b deployment k8s

deployment:应用生命周期管理流程
应用程序 -> 部署 -> 升级 ->回滚 -> 删除

1 部署

deployment###

kubectl apply -f web1-deployp.yaml
kubectl create deployment web --image=nginx:1.16 --replicas=3

#web1-deploy.yaml																							
kind: Deployment																							
metadata:																							
  annotations:																							
apiVersion: apps/v1																							
kind: Deployment																							
metadata:																							
  name: web1																							
  namespace: web1																							
  labels:																							
    app: web1-app																							
    project: web1-pj																							
spec:																							
  replicas: 3																							
  selector:																							
    matchLabels:																							
      app: web1-app																							
  template:																							
    metadata:																							
      labels:																							
        app: web1-app																							
    spec:																							
      containers:																							
      - image: nginx:1.16																							
        name: nginx																							

[root@k8s-master ~]# vi web1-deploy.yaml
[root@k8s-master ~]# kubectl apply -f web1-deploy.yaml
deployment.apps/web1 created
[root@k8s-master ~]# kubectl get pods -n web1
NAME READY STATUS RESTARTS AGE
web1-546f799d9-gjdll 1/1 Running 0 34s
web1-546f799d9-h8s9k 1/1 Running 0 34s
web1-546f799d9-rmlzk 1/1 Running 0 34s

service###

[root@k8s-master ~]# vi web1-service.yaml
apiVersion: v1
kind: Service
metadata:
name: web1
namespace: web1
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: web1-app
type: NodePort

[root@k8s-master ~]# kubectl apply -f web1-service.yaml
service/web1 created
[root@k8s-master ~]# kubectl get pods,svc -n web1
NAME READY STATUS RESTARTS AGE
pod/web1-546f799d9-gjdll 1/1 Running 0 19m
pod/web1-546f799d9-h8s9k 1/1 Running 0 19m
pod/web1-546f799d9-rmlzk 1/1 Running 0 19m

NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/web1 NodePort 10.97.204.112 80:31065/TCP 13m

[root@k8s-master ~]# kubectl logs web1-546f799d9-gjdll -n web1
[root@k8s-master ~]# kubectl logs web1-546f799d9-h8s9k -n web1
[root@k8s-master ~]# kubectl logs web1-546f799d9-rmlzk -n web1
10.5.0.5 - - [20/Feb/2022:08:01:57 +0000] "GET / HTTP/1.1" 200 612 "-" "Mozilla/5.0 (Windows NT 10.0
; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.82 Safari/537.36" "-"
2022/02/20 08:01:57 [error] 7#7: *1 open() "/usr/share/nginx/html/favicon.ico" failed (2: No such fi
le or directory), client: 10.5.0.5, server: localhost, request: "GET /favicon.ico HTTP/1.1", host: "
10.5.0.5:31065", referrer: "http://10.5.0.5:31065/"
10.5.0.5 - - [20/Feb/2022:08:01:57 +0000] "GET /favicon.ico HTTP/1.1" 404 555 "http://10.5.0.5:31065
/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.475
8.82 Safari/537.36" "-"
10.5.0.5 - - [20/Feb/2022:08:02:13 +0000] "GET / HTTP/1.1" 304 0 "-" "Mozilla/5.0 (Windows NT 10.0;
Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.82 Safari/537.36" "-"

2 应用升级
更新镜像的三种方式,
kubectl apply -f xxx.yaml
kubectl set image deployment/web nginx=nginx:1.17
kubectl edit deployment/web #系统编辑器

升级前版本号1.16

滚动升级
[root@k8s-master ~]# vi web1-deploy.yaml

spec:
containers:
- image: nginx:1.17

[root@k8s-master ~]# kubectl apply -f web1-deploy.yaml
deployment.apps/web1 configured
[root@k8s-master ~]# kubectl get pods,svc -n web1
NAME READY STATUS RESTARTS AGE
pod/web1-546f799d9-gjdll 1/1 Running 0 83m
pod/web1-546f799d9-h8s9k 1/1 Running 0 83m
pod/web1-778dcf88b-7lgjm 1/1 Running 0 25s
pod/web1-778dcf88b-tj86f 0/1 ContainerCreating 0 11s

NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/web1 NodePort 10.97.204.112 80:31065/TCP 77m
[root@k8s-master ~]# kubectl get pods,svc -n web1
NAME READY STATUS RESTARTS AGE
pod/web1-546f799d9-gjdll 0/1 Terminating 0 83m
pod/web1-546f799d9-h8s9k 0/1 Terminating 0 83m
pod/web1-778dcf88b-7lgjm 1/1 Running 0 36s
pod/web1-778dcf88b-c7fw9 1/1 Running 0 7s
pod/web1-778dcf88b-tj86f 1/1 Running 0 22s

NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/web1 NodePort 10.97.204.112 80:31065/TCP 77m
[root@k8s-master ~]# kubectl get pods,svc -n web1
NAME READY STATUS RESTARTS AGE
pod/web1-778dcf88b-7lgjm 1/1 Running 0 57s
pod/web1-778dcf88b-c7fw9 1/1 Running 0 28s
pod/web1-778dcf88b-tj86f 1/1 Running 0 43s

NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/web1 NodePort 10.97.204.112 80:31065/TCP 77m

[root@k8s-master ~]# kubectl set image deployment web1 nginx=nginx:1.18 -n web1
deployment.apps/web1 image updated

kubectl edit deployment web1 -n web1

滚动升级过程

[root@k8s-master ~]# kubectl get replicaset -n web1																							
NAME             DESIRED   CURRENT   READY   AGE																							
web1-546f799d9   0         0         0       100m																->	nginx:1.16						
web1-778dcf88b   0         0         0       17m																->	nginx:1.17						
web1-69f84f567   3         3         3       8m20s																->	nginx:1.18						

deployment -> replicaset

[root@k8s-master ~]# kubectl describe deploy web1 -n web1																							
Name:                   web1																							
Namespace:              web1																							
CreationTimestamp:      Sun, 20 Feb 2022 07:51:11 +0000																							
Labels:                 app=web1-app																							
                        project=web1-pj																							
Annotations:            deployment.kubernetes.io/revision: 3																							
Selector:               app=web1-app																							
Replicas:               3 desired | 3 updated | 3 total | 3 available | 0 unavailable																							
StrategyType:           RollingUpdate																							
MinReadySeconds:        0																							
RollingUpdateStrategy:  25% max unavailable, 25% max surge																							
Pod Template:																							
  Labels:  app=web1-app																							
  Containers:																							
   nginx:																							
    Image:        nginx:1.18																							
OldReplicaSets:  <none>																							
NewReplicaSet:   web1-69f84f567 (3/3 replicas created)																							
Events:																							
  Type    Reason             Age                From                   Message																							
  ----    ------             ----               ----                   -------																							
  Normal  ScalingReplicaSet  22m                deployment-controller  Scaled up replica set web1-778dcf88b to 1																							
  Normal  ScalingReplicaSet  21m                deployment-controller  Scaled down replica set web1-546f799d9 to 2																							
  Normal  ScalingReplicaSet  21m                deployment-controller  Scaled up replica set web1-778dcf88b to 2																							
  Normal  ScalingReplicaSet  21m                deployment-controller  Scaled down replica set web1-546f799d9 to 1																							
  Normal  ScalingReplicaSet  21m                deployment-controller  Scaled up replica set web1-778dcf88b to 3																							
  Normal  ScalingReplicaSet  21m                deployment-controller  Scaled down replica set web1-546f799d9 to 0																							
  Normal  ScalingReplicaSet  13m                deployment-controller  Scaled up replica set web1-69f84f567 to 1																							
  Normal  ScalingReplicaSet  13m                deployment-controller  Scaled down replica set web1-778dcf88b to 2																							
  Normal  ScalingReplicaSet  13m                deployment-controller  Scaled up replica set web1-69f84f567 to 2																							
  Normal  ScalingReplicaSet  12m (x3 over 12m)  deployment-controller  (combined from similar events): Scaled down replica set web1-778dcf88b to 0																							

3 水平扩缩容(启动多实例,挺高并发性)
修改yaml里的replicas值,再apply
kubectl scale deployment web1 --replicas=10
*replicas参数控制pod副本数
[root@k8s-master ~]# vi web1-deploy.yaml
spec:
replicas: 10
[root@k8s-master ~]# kubectl apply -f web1-deploy.yaml
deployment.apps/web1 configured
[root@k8s-master ~]# kubectl get pods -n web1
NAME READY STATUS RESTARTS AGE
web1-778dcf88b-2lqvr 1/1 Running 0 22s
web1-778dcf88b-2mglr 1/1 Running 0 21s
web1-778dcf88b-4fgqq 1/1 Running 0 26s
web1-778dcf88b-5d69b 1/1 Running 0 21s
web1-778dcf88b-6jqzk 1/1 Running 0 26s
web1-778dcf88b-7gnnv 1/1 Running 0 23s
web1-778dcf88b-f26ld 1/1 Running 0 26s
web1-778dcf88b-j5mhr 1/1 Running 0 24s
web1-778dcf88b-m78lc 1/1 Running 0 26s
web1-778dcf88b-nzrmc 1/1 Running 0 26s
[root@k8s-master ~]# kubectl scale deployment web1 --replicas=5 -n web1
deployment.apps/web1 scaled
[root@k8s-master ~]# kubectl get pods -n web1
NAME READY STATUS RESTARTS AGE
web1-778dcf88b-2lqvr 0/1 Terminating 0 2m36s
web1-778dcf88b-2mglr 0/1 Terminating 0 2m35s
web1-778dcf88b-4fgqq 1/1 Running 0 2m40s
web1-778dcf88b-5d69b 0/1 Terminating 0 2m35s
web1-778dcf88b-6jqzk 1/1 Running 0 2m40s
web1-778dcf88b-7gnnv 0/1 Terminating 0 2m37s
web1-778dcf88b-f26ld 1/1 Running 0 2m40s
web1-778dcf88b-j5mhr 0/1 Terminating 0 2m38s
web1-778dcf88b-m78lc 1/1 Running 0 2m40s
web1-778dcf88b-nzrmc 1/1 Running 0 2m40s
[root@k8s-master ~]# kubectl get pods -n web1
NAME READY STATUS RESTARTS AGE
web1-778dcf88b-4fgqq 1/1 Running 0 2m51s
web1-778dcf88b-6jqzk 1/1 Running 0 2m51s
web1-778dcf88b-f26ld 1/1 Running 0 2m51s
web1-778dcf88b-m78lc 1/1 Running 0 2m51s
web1-778dcf88b-nzrmc 1/1 Running 0 2m51s

4 回滚(项目升级失败回复到正常版本)
kubectl rollout history deployment/web #查看历史发布版本
kubectl rollout undo deployment/web #回滚上一个版本
kubectl rollout undo deployment/web --to-revision=2 #回滚到历史指定版本

[root@k8s-master ~]# kubectl get rs -n web1																							
NAME             DESIRED   CURRENT   READY   AGE																							
web1-546f799d9   0         0         0       135m																							
web1-69f84f567   0         0         0       44m																							
web1-778dcf88b   5         5         5       52m																							
																							
[root@k8s-master ~]# kubectl rollout history deployment web1 -n web1																							
deployment.apps/web1																							
REVISION  CHANGE-CAUSE																							
1         <none>																							
3         <none>																							
4         <none>																							
																							
[root@k8s-master ~]# kubectl rollout undo deployment web1 -n web1																							
deployment.apps/web1 rolled back																							
[root@k8s-master ~]# kubectl get pods -n web1																							
NAME                   READY   STATUS        RESTARTS   AGE																							
web1-69f84f567-2pflg   1/1     Running       0          9s																							
web1-69f84f567-5kcvt   1/1     Running       0          9s																							
web1-69f84f567-lv8t4   1/1     Running       0          11s																							
web1-69f84f567-xsjlm   1/1     Running       0          11s																							
web1-69f84f567-zqm6m   1/1     Running       0          11s																							
web1-778dcf88b-6jqzk   0/1     Terminating   0          15m																							
web1-778dcf88b-m78lc   0/1     Terminating   0          15m																							
web1-778dcf88b-nzrmc   0/1     Terminating   0          15m																							
[root@k8s-master ~]# kubectl get pods -n web1																							
NAME                   READY   STATUS    RESTARTS   AGE																							
web1-69f84f567-2pflg   1/1     Running   0          15s																							
web1-69f84f567-5kcvt   1/1     Running   0          15s																							
web1-69f84f567-lv8t4   1/1     Running   0          17s																							
web1-69f84f567-xsjlm   1/1     Running   0          17s																							
web1-69f84f567-zqm6m   1/1     Running   0          17s																							
																							
[root@k8s-master ~]# kubectl rollout history deployment web1 -n web1																							
deployment.apps/web1																							
REVISION  CHANGE-CAUSE																							
1         <none>																							
4         <none>																							
5         <none>																							
																							
[root@k8s-master ~]# kubectl get rs -n web1																							
NAME             DESIRED   CURRENT   READY   AGE																							
web1-546f799d9   0         0         0       140m																							
web1-69f84f567   5         5         5       48m																							
web1-778dcf88b   0         0         0       57m																							

5 删除
kubectl delete deployment/web
kubectl delete svc/web

*kubeclt deletel pod 删除pod并没有用,是由控制器管理的,控制器还会再启起来新的pod																							
	[root@k8s-master ~]# kubectl delete pod web1-69f84f567-2pflg -n web1																						
	pod "web1-69f84f567-2pflg" deleted																						
																							
	[root@k8s-master ~]# kubectl get pods -n web1																						
	NAME                   READY   STATUS    RESTARTS   AGE																						
	web1-69f84f567-5kcvt   1/1     Running   0          19m																						
	web1-69f84f567-bp6sr   1/1     Running   0          16s																						
	web1-69f84f567-lv8t4   1/1     Running   0          19m																						
	web1-69f84f567-xsjlm   1/1     Running   0          19m																						
	web1-69f84f567-zqm6m   1/1     Running   0          19m																						
	[root@k8s-master ~]#																						

滚动升级与回滚实现机制

标签:kubectl,生命周期,Running,web1,778dcf88b,deployment,k8s
From: https://www.cnblogs.com/z20240722/p/18316061

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