K8s使用deploy部署nginx

info

 k8smaster 192.168.88.70
 k8snode1 192.168.88.71
 k8snode2192.168.88.72
 

使用deployment 部署nginx服务

deploy文件如下：

root@k8s-master:~# cat ngdeploy.yaml 
apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-nginx
spec:
  replicas: 2
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:latest
        ports:
        - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: ngx-service
  labels:
    app: nginx
spec:
  type: NodePort
  selector:
    app: nginx
  ports:
  - port: 80
    targetPort: 80
    nodePort: 32500



创建deploy

kubectl apply -f  ngdeploy.yaml


删除 
kubectl delete -f  ngdeploy.yaml

查看pod及svc服务
root@k8s-master:~# kubectl get pod,svc
NAME                           READY   STATUS    RESTARTS   AGE
pod/my-nginx-585449566-6g2rh   1/1     Running   0          3m37s
pod/my-nginx-585449566-9nwgt   1/1     Running   0          3m37s
pod/my-nginx-585449566-ww28p   1/1     Running   0          3m37s
pod/nginx-deployment           1/1     Running   0          10m

NAME                  TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)        AGE
service/kubernetes    ClusterIP   10.96.0.1      <none>        443/TCP        4h38m
service/ngx-service   NodePort    10.96.36.220   <none>        80:32500/TCP   3m37s
root@k8s-master:~# 

   
    
 masterip
 http://192.168.88.70:32500/   
 

命令行方式创建nginx服务

 1）、创建一个nginx的pod
现在我们在kubernetes集群中创建一个nginx的pod，验证是否能正常运行。
在master节点执行一下步骤：

[root@k8s-master ~]# kubectl create deployment nginx --image=nginx
deployment.apps/nginx created
[root@k8s-master ~]# kubectl expose deployment nginx --port=80 --type=NodePort
service/nginx exposed


现在我们查看pod和service

[root@k8s-master ~]# kubectl get pod,svc -o wide
NAME                           READY   STATUS    RESTARTS   AGE    IP           NODE        NOMINATED NODE   READINESS GATES

pod/nginx-6799fc88d8-9wjjt     1/1     Running   0          33s    10.244.2.4   k8s-node2   <none>           <none>

NAME                  TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE     SELECTOR
service/kubernetes    ClusterIP   10.96.0.1       <none>        443/TCP        4h40m   <none>
service/nginx         NodePort    10.96.172.103   <none>        80:30346/TCP   22s     app=nginx
service/ngx-service   NodePort    10.96.36.220    <none>        80:32500/TCP   6m2s    app=nginx
root@k8s-master:~# 

打印的结果中，前半部分是pod相关信息，后半部分是service相关信息。我们看service/nginx这一行可以看出service暴漏给集群的端口是 32500。记住这个端口。
然后从pod的详细信息可以看出此时pod在node2节点之上。node2节点的IP地址是192.168.88.72

删除

kubectl  get pod -o wide
nginx-deployment           1/1     Running   1          41h   10.244.1.5   k8s-node1   <none>           <none>

see also

K8S 使用deploy部署nginx