kubernetes搭建 十、deployment和service的yaml配置文件示例

1、输出json格式的配置文件，比较乱，所以推荐使用yaml格式的配置文件

[root@k8s-master-101 ~]# kubectl get pod busybox-5fb9cd66d6-flf6r -o json

2、输出yaml格式的配置文件

 kubectl get pod busybox-5fb9cd66d6-flf6r -o yaml

3、deployment配置文件示例

mkdir yaml_test
cd yaml_test/
[root@k8s-master-101 yaml_test]# cat nginx-deployment.yaml 
apiVersion: apps/v1beta2
kind: Deployment
metadata:
  name: nginx-deployment
  namespace: default
  labels:
    web: nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.10
        ports:
        - containerPort: 80

4、labels标签 放在metadata里，selector选择器中匹配的标签要和template模板中的标签一致，后面创建的service中选择器匹配的也是这个标签
创建deployment

[root@k8s-master-101 yaml_test]# kubectl create -f nginx-deployment.yaml
deployment.apps/nginx-deployment created

#生成的pod
[root@k8s-master-101 yaml_test]# kubectl get pod -o wide
NAME                                READY   STATUS    RESTARTS   AGE   IP            NODE         NOMINATED NODE
busybox-5fb9cd66d6-flf6r            1/1     Running   0          89m   172.17.71.7   10.0.0.103   
nginx-deployment-67dccb759c-4jdtj   1/1     Running   0          35s   172.17.50.2   10.0.0.102   
nginx-deployment-67dccb759c-h9mdd   1/1     Running   0          35s   172.17.71.6   10.0.0.103   
nginx-deployment-67dccb759c-jjs6q   1/1     Running   0          35s   172.17.71.5   10.0.0.103   

#可以看到生成的标签为app=nginx
[root@k8s-master-101 yaml_test]# kubectl get pod --show-labels
NAME                                READY   STATUS    RESTARTS   AGE     LABELS
busybox-5fb9cd66d6-flf6r            1/1     Running   0          92m     pod-template-hash=5fb9cd66d6,run=busybox
nginx-deployment-67dccb759c-4jdtj   1/1     Running   0          3m36s   app=nginx,pod-template-hash=67dccb759c
nginx-deployment-67dccb759c-h9mdd   1/1     Running   0          3m36s   app=nginx,pod-template-hash=67dccb759c
nginx-deployment-67dccb759c-jjs6q   1/1     Running   0          3m36s   app=nginx,pod-template-hash=67dccb759c

5、service的配置文件示例
这里的selector标签选择器选择的标签为上面depoyment中pod的选择器标签app: nginx

[root@k8s-master-101 yaml_test]# cat nginx-service.yaml 
apiVersion: v1
kind: Service
metadata:
  name: nginx-service
  labels:
    app: nginx
spec:
  ports:
  - port: 88
    targetPort: 80
  selector:
    app: nginx

6、创建service

kubectl create -f nginx-service.yaml

7、查看状态

[root@k8s-master-101 yaml_test]# kubectl get all
NAME                                    READY   STATUS    RESTARTS   AGE
pod/busybox-5fb9cd66d6-flf6r            1/1     Running   0          95m
pod/nginx-deployment-67dccb759c-4jdtj   1/1     Running   0          6m42s
pod/nginx-deployment-67dccb759c-h9mdd   1/1     Running   0          6m42s
pod/nginx-deployment-67dccb759c-jjs6q   1/1     Running   0          6m42s

NAME                    TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)   AGE
service/kubernetes      ClusterIP   10.10.10.1             443/TCP   19d
service/nginx-service   ClusterIP   10.10.10.229           88/TCP    3s

NAME                               DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/busybox            1         1         1            1           95m
deployment.apps/nginx-deployment   3         3         3            3           6m42s

NAME                                          DESIRED   CURRENT   READY   AGE
replicaset.apps/busybox-5fb9cd66d6            1         1         1       95m
replicaset.apps/nginx-deployment-67dccb759c   3         3         3       6m42s