k8s yaml文件名词释义及yaml模板

```
apiVersion: v1             #指定api版本，此值必须在kubectl apiversion中  
kind: Pod                  #指定创建资源的角色/类型  
metadata:                  #资源的元数据/属性  
  name: web04-pod          #资源的名字，在同一个namespace中必须唯一  
  labels:                  #设定资源的标签，详情请见http://blog.csdn.net/liyingke112/article/details/77482384
    k8s-app: apache  
    version: v1  
    kubernetes.io/cluster-service: "true"  
  annotations:             #自定义注解列表  
    - name: String         #自定义注解名字  
spec:#specification of the resource content 指定该资源的内容  
  restartPolicy: Always    #表明该容器一直运行，默认k8s的策略，在此容器退出后，会立即创建一个相同的容器  
  nodeSelector:            #节点选择，先给主机打标签kubectl label nodes kube-node1 zone=node1  
    zone: node1  
  containers:  
  - name: web04-pod        #容器的名字  
    image: web:apache      #容器使用的镜像地址  
    imagePullPolicy: Never #三个选择Always、Never、IfNotPresent，每次启动时检查和更新（从registery）images的策略，
                           # Always，每次都检查
                           # Never，每次都不检查（不管本地是否有）
                           # IfNotPresent，如果本地有就不检查，如果没有就拉取
    command: ['sh']        #启动容器的运行命令，将覆盖容器中的Entrypoint,对应Dockefile中的ENTRYPOINT  
    args: ["$(str)"]       #启动容器的命令参数，对应Dockerfile中CMD参数  
    env:                   #指定容器中的环境变量  
    - name: str            #变量的名字  
      value: "/etc/run.sh" #变量的值  
    resources:             #资源管理，请求请见http://blog.csdn.net/liyingke112/article/details/77452630
      requests:            #容器运行时，最低资源需求，也就是说最少需要多少资源容器才能正常运行  
        cpu: 0.1           #CPU资源（核数），两种方式，浮点数或者是整数+m，0.1=100m，最少值为0.001核（1m）
        memory: 32Mi       #内存使用量  
      limits:              #资源限制  
        cpu: 0.5  
        memory: 32Mi  
    ports:  
    - containerPort: 80    #容器开发对外的端口
      name: httpd          #名称
      protocol: TCP  
    livenessProbe:         #pod内容器健康检查的设置，详情请见http://blog.csdn.net/liyingke112/article/details/77531584
      httpGet:             #通过httpget检查健康，返回200-399之间，则认为容器正常  
        path: /            #URI地址  
        port: 80  
        #host: 127.0.0.1   #主机地址  
        scheme: HTTP  
      initialDelaySeconds: 180 #表明第一次检测在容器启动后多长时间后开始  
      timeoutSeconds: 5    #检测的超时时间  
      periodSeconds: 15    #检查间隔时间  
      #也可以用这种方法  
      #exec: 执行命令的方法进行监测，如果其退出码不为0，则认为容器正常  
      #  command:  
      #    - cat  
      #    - /tmp/health  
      #也可以用这种方法  
      #tcpSocket: //通过tcpSocket检查健康   
      #  port: number   
    lifecycle:             #生命周期管理  
      postStart:           #容器运行之前运行的任务  
        exec:  
          command:  
            - 'sh'  
            - 'yum upgrade -y'  
      preStop:             #容器关闭之前运行的任务  
        exec:  
          command: ['service httpd stop']  
    volumeMounts:          #详情请见http://blog.csdn.net/liyingke112/article/details/76577520
    - name: volume         #挂载设备的名字，与volumes[*].name 需要对应    
      mountPath: /data     #挂载到容器的某个路径下  
      readOnly: True  
  volumes:                 #定义一组挂载设备  
  - name: volume           #定义一个挂载设备的名字  
    #meptyDir: {}  
    hostPath:  
      path: /opt           #挂载设备类型为hostPath，路径为宿主机下的/opt,这里设备类型支持很多种 
```
**nginx.yaml**
```
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      name: nginx
  template:
    metadata:
      labels:
        name: nginx
    spec:
      containers:
        - name: nginx
          image: harbor.xxx.cn/official_hub/nginx:1.13-alpine
          imagePullPolicy: IfNotPresent
          ports:
            - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: nginx-service-nodeport
spec:
  ports:
    - port: 80
      targetPort: 80
      protocol: TCP
  type: NodePort
  selector:
    name: nginx
```
### mrdoc
```
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: mrdoc
  name: mrdoc
  namespace: mrdoc
spec:
  replicas: 1 #k8s中要启动的pod个数，可以任意修改
  selector:
    matchLabels:
      app: mrdoc
  template:
    metadata: 
      labels:
        app: mrdoc
    spec:
      containers:
      - image: jrt101/mrdoc:latest
        ports:
        - containerPort: 10086
        name: mrdoc
---
apiVersion: v1
kind: Service
metadata:
  labels:
   app: mrdoc
  name: mrdoc
  namespace: mrdoc
spec:
  ports:
  - port: 10086
    name: mrdoc
    protocol: TCP
   # targetPort: 80
    nodePort: 32111
  selector:
    app: mrdoc
  type: NodePort

```
#### 加挂载
```
[root@jrt ~]# cat mrdoc.yaml 
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: mrdoc
  name: mrdoc
  namespace: mrdoc
spec:
  replicas: 1 #k8s中要启动的pod个数，可以任意修改
  selector:
    matchLabels:
      app: mrdoc
  template:
    metadata: 
      labels:
        app: mrdoc
    spec:
      volumes:
        - name: mrdoc
          hostPath:
            path: /root/foot_base.html
            type: File
      containers:
      - image: jrt101/mrdoc:latest
        ports:
        - containerPort: 10086
        name: mrdoc
        volumeMounts:
          - mountPath: /app/Mrdoc/template/app_doc/foot_base.html
            name:  mrdoc
      #tolerations:
      #- key: "node-role.kubernetes.io/master"
      #  operator: "Exists"
      #  effect: "NoSchedule"
---
apiVersion: v1
kind: Service
metadata:
  labels:
   app: mrdoc
  name: mrdoc
  namespace: mrdoc
spec:
  ports:
  - port: 10086
    name: mrdoc
    protocol: TCP
   # targetPort: 80
    nodePort: 32111
  selector:
    app: mrdoc
  type: NodePort

```
### jenkins
```
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: jenkins
  namespace: jenkins
spec:
  serviceName: jenkins
  replicas: 1
  selector:
    matchLabels:
      app: jenkins
  template:
    metadata:
      labels:
        app: jenkins
    spec:
      containers:
        - name: jenkins
          image: jenkins4eval/jenkins
          imagePullPolicy: IfNotPresent
          securityContext:
            runAsUser: 0
          volumeMounts:
            - mountPath: /var/jenkins_home
              name: jenkins-volume
            - mountPath: /var/run/docker.sock
              name: jenkins-sock
            - mountPath: /bin/docker
              name: jenkins-docker
          env:
            - name: TZ
              value: Asia/Shanghai
          ports:
            - containerPort: 8080
      volumes:
        - name: jenkins-volume
          hostPath:
            path: /data/wangzhichao/jenkins
            type: Directory
        - name: jenkins-sock
          hostPath:
            path: /run/docker.sock
            type: Socket
        - name: jenkins-docker
          hostPath:
            path: /bin/docker
            type: File
---
apiVersion: v1
kind: Service
metadata:
  namespace: jenkins
  name: jenkins
spec:
  type: NodePort
  ports:
    - port: 8080
      targetPort: 8080
      nodePort: 32247
  selector:
    app: jenkins
```