Kubernetes之Service发布类型-ClusterIP 项目实战

文章目录

创建命名空间 kubectl create namespace wordpress

[root@manager-node wordpress]# kubectl create namespace wordpress
namespace/wordpress created
[root@manager-node wordpress]#

创建配置文件 wordpress-db.yaml文件 [数据库]

apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: mysql-deploy
  namespace: wordpress
  labels:
    app: mysql
spec:
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers:
      - name: mysql
        image: mysql:5.6  
        imagePullPolicy: IfNotPresent
        ports:
        - containerPort: 3306
          name: dbport
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: rootPassW0rd
        - name: MYSQL_DATABASE
          value: wordpress
        - name: MYSQL_USER
          value: wordpress
        - name: MYSQL_PASSWORD
          value: wordpress
        volumeMounts:
        - name: db
          mountPath: /var/lib/mysql
      volumes:
      - name: db
        hostPath:
          path: /var/lib/mysql
---
apiVersion: v1
kind: Service
metadata:
  name: mysql
  namespace: wordpress
spec:
  selector:
    app: mysql
  ports:
  - name: mysqlport
    protocol: TCP
    port: 3306
    targetPort:

启动 kubectl apply -f wordpress-db.yaml

[root@manager-node wordpress]# ls -la
total 4
drwxr-xr-x. 2 root root  31 Jan 13 13:45 .
drwxr-xr-x. 3 root root  23 Jan 13 13:44 ..
-rw-r--r--. 1 root root 973 Jan 13 13:45 wordpress-db.yaml
[root@manager-node wordpress]# pwd
/root/demo/clusterip-demo/wordpress
[root@manager-node wordpress]# kubectl apply -f wordpress-db.yaml 
deployment.apps/mysql-deploy created
service/mysql created
[root@manager-node wordpress]# 
[root@manager-node wordpress]# kubectl get pods -n wordpress -o wide
NAME                            READY   STATUS    RESTARTS   AGE     IP               NODE            NOMINATED NODE   READINESS GATES
mysql-deploy-78cd6964bd-8mqpg   1/1     Running   0          3m28s   192.168.101.55   worker01-node   <none>           <none>
[root@manager-node wordpress]#

启动的时候 可能会稍微慢点，需要一点时间去创建pod
** 查看进度 kubectl describe pod mysql-deploy-78cd6964bd-8mqpg -n wordpress**

[root@manager-node wordpress]# kubectl describe pod mysql-deploy-78cd6964bd-8mqpg -n wordpress
Name:               mysql-deploy-78cd6964bd-8mqpg
Namespace:          wordpress
Priority:           0
PriorityClassName:  <none>
Node:               worker01-node/10.0.2.15
Start Time:         Mon, 13 Jan 2020 14:08:29 +0000
Labels:             app=mysql
                    pod-template-hash=78cd6964bd
Annotations:        cni.projectcalico.org/podIP: 192.168.101.55/32
Status:             Running
IP:                 192.168.101.55
Controlled By:      ReplicaSet/mysql-deploy-78cd6964bd
Containers:
  mysql:
    Container ID:   docker://f23577ebc0603015c8dc101ba156ca373ead0d112cbbe5235f09b0e975dfa03b
    Image:          mysql:5.6
    Image ID:       docker-pullable://mysql@sha256:82a505551c0243ca04df445f1287b2c4da3b23463b1a9c0bc2b2476760179950
    Port:           3306/TCP
    Host Port:      0/TCP
    State:          Running
      Started:      Mon, 13 Jan 2020 14:11:04 +0000
    Ready:          True
    Restart Count:  0
    Environment:
      MYSQL_ROOT_PASSWORD:  rootPassW0rd
      MYSQL_DATABASE:       wordpress
      MYSQL_USER:           wordpress
      MYSQL_PASSWORD:       wordpress
    Mounts:
      /var/lib/mysql from db (rw)
      /var/run/secrets/kubernetes.io/serviceaccount from default-token-v764r (ro)
Conditions:
  Type              Status
  Initialized       True 
  Ready             True 
  ContainersReady   True 
  PodScheduled      True 
Volumes:
  db:
    Type:          HostPath (bare host directory volume)
    Path:          /var/lib/mysql
    HostPathType:  
  default-token-v764r:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  default-token-v764r
    Optional:    false
QoS Class:       BestEffort
Node-Selectors:  <none>
Tolerations:     node.kubernetes.io/not-ready:NoExecute for 300s
                 node.kubernetes.io/unreachable:NoExecute for 300s
Events:
  Type    Reason     Age    From                    Message
  ----    ------     ----   ----                    -------
  Normal  Scheduled  4m59s  default-scheduler       Successfully assigned wordpress/mysql-deploy-78cd6964bd-8mqpg to worker01-node
  Normal  Pulling    4m58s  kubelet, worker01-node  Pulling image "mysql:5.6"
  Normal  Pulled     2m25s  kubelet, worker01-node  Successfully pulled image "mysql:5.6"
  Normal  Created    2m25s  kubelet, worker01-node  Created container mysql
  Normal  Started    2m24s  kubelet, worker01-node  Started container mysql
[root@manager-node wordpress]#

创建wordpress配置文件 wordpress.yaml

apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: wordpress-deploy
  namespace: wordpress
  labels:
    app: wordpress
spec:
  template:
    metadata:
      labels:
        app: wordpress
    spec:
      containers:
      - name: wordpress
        image: wordpress
        imagePullPolicy: IfNotPresent
        ports:
        - containerPort: 80
          name: wdport
        env:
        - name: WORDPRESS_DB_HOST
          value: 192.168.1.133:3306                     
        - name: WORDPRESS_DB_USER
          value: wordpress
        - name: WORDPRESS_DB_PASSWORD
          value: wordpress
---
apiVersion: v1
kind: Service
metadata:
  name: wordpress
  namespace: wordpress
spec:
  type: NodePort
  selector:
    app: wordpress
  ports:
  - name: wordpressport
    protocol: TCP
    port: 80
    targetPort:

[root@manager-node wordpress]# kubectl apply -f wordpress.yaml  
deployment.apps/wordpress-deploy created
service/wordpress created
[root@manager-node wordpress]#

[root@manager-node wordpress]# kubectl get pods -n wordpress -o wide                               
NAME                                READY   STATUS    RESTARTS   AGE     IP               NODE            NOMINATED NODE   READINESS GATES
mysql-deploy-78cd6964bd-8mqpg       1/1     Running   0          37m     192.168.101.55   worker01-node   <none>           <none>
wordpress-deploy-6867948b7b-vk9n7   1/1     Running   0          7m40s   192.168.101.56   worker01-node   <none>           <none>
[root@manager-node wordpress]#

这个有点耗时，这里注意下

[root@manager-node wordpress]# kubectl get svc -n wordpress -o wide
NAME        TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE   SELECTOR
mysql       ClusterIP   10.109.42.210   <none>        3306/TCP       31m   app=mysql
wordpress   NodePort    10.97.184.238   <none>        80:31629/TCP   2m    app=wordpress
[root@manager-node wordpress]#