kubernetes（k8s）常用deploy模板 并验证

root@hello:~# cat deploy.yaml 

apiVersion: apps/v1

kind: Deployment

metadata: 

  name: hostname-test-cby

  labels:

    name: hostname-test-cby

spec:

  # 副本数

  replicas: 10

  # 标签选择器

  selector:

    matchLabels:

      name: hostname-test-cby

  # 更新策略

  strategy:

    rollingUpdate:

      maxSurge: 3    # 更新最大数量

      maxUnavailable: 3    #更新时最大不可用数量

    type: RollingUpdate  #滚动更新

  # 模板

  template:

    metadata:

      labels:

        name: hostname-test-cby

    spec:

      # 配置容器

      containers:

      - name: hostname-test-cby #容器名

        image: nginx #镜像

        imagePullPolicy: IfNotPresent # 拉取策略

        resources:

          requests:

            cpu: "100m" #CPU限制

            memory: "300M" #内存限制

        # 健康监测

        livenessProbe:

          httpGet:

            path: / # 探测路径

            port: 80 # 端口

          initialDelaySeconds: 15 # 第一次探测等待

          timeoutSeconds: 3 # 探测的超时后等待多少秒

        # 就绪探测

        readinessProbe:

          httpGet:

            path: / # 探测路径

            port: 80 # 端口

          initialDelaySeconds: 10 # 第一次探测等待

          timeoutSeconds: 3 # 探测的超时后等待多少秒

        #环境变量

        env:

        - name: cby

          value: chenby

        # 配置容器端口

        ports:

        - containerPort: 80

        # 配置挂载到目录

        volumeMounts:

        - mountPath: /usr/share/nginx/html/

          name: data

      # 配置目录挂载

      volumes:

      - name: data

        hostPath:

          path: /html/

          type: Directory

      # 配置指定解析

      hostAliases:

      - ip: "192.168.1.1" #IP地址

        hostnames:

        - "cby" #主机名

        - "cby.chenby.cn" #主机名

      - ip: "192.168.1.10"#IP地址

        hostnames:

        - "chenby" #主机名

        - "chenby.chenby.cn" #主机名

root@hello:~# 

root@hello:~# kubectl apply -f deploy.yaml 

deployment.apps/hostname-test-cby created



root@hello:~# mkdir /html

root@hello:~# echo 123 > /html/index.html



root@hello:~# kubectl  get pod  -o wide

NAME                               READY   STATUS    RESTARTS   AGE   IP              NODE         NOMINATED NODE   READINESS GATES

hostname-test-cby-86df45bf-9fx5n   1/1     Running   0          43s   172.17.125.38   k8s-node01   <none>           <none>

hostname-test-cby-86df45bf-cmv2b   1/1     Running   0          43s   172.17.125.37   k8s-node01   <none>           <none>

hostname-test-cby-86df45bf-f6drb   1/1     Running   0          43s   172.17.125.41   k8s-node01   <none>           <none>

hostname-test-cby-86df45bf-g79x2   1/1     Running   0          43s   172.27.14.232   k8s-node02   <none>           <none>

hostname-test-cby-86df45bf-h6blv   1/1     Running   0          43s   172.27.14.233   k8s-node02   <none>           <none>

hostname-test-cby-86df45bf-hqjnj   1/1     Running   0          43s   172.17.125.40   k8s-node01   <none>           <none>

hostname-test-cby-86df45bf-jt2rz   1/1     Running   0          43s   172.27.14.236   k8s-node02   <none>           <none>

hostname-test-cby-86df45bf-s5jjn   1/1     Running   0          43s   172.27.14.235   k8s-node02   <none>           <none>

hostname-test-cby-86df45bf-vfkbt   1/1     Running   0          43s   172.17.125.39   k8s-node01   <none>           <none>

hostname-test-cby-86df45bf-z2x2b   1/1     Running   0          43s   172.27.14.234   k8s-node02   <none>           <none>

root@hello:~# 

# 访问测试

root@hello:~# curl 172.17.125.38

123

root@hello:~# 



root@hello:~# kubectl  exec hostname-test-cby-86df45bf-9fx5n -it -- /bin/bash 

root@hostname-test-cby-86df45bf-9fx5n:/# 



# 查看dns解析

root@hostname-test-cby-86df45bf-9fx5n:/# cat /etc/resolv.conf 

search default.svc.cluster.local svc.cluster.local cluster.local

nameserver 10.96.0.10

options ndots:5

root@hostname-test-cby-86df45bf-9fx5n:/# 



# 查看host配置已生效

root@hostname-test-cby-86df45bf-9fx5n:/# cat /etc/hosts 

# Kubernetes-managed hosts file.

127.0.0.1       localhost

::1     localhost ip6-localhost ip6-loopback

fe00::0 ip6-localnet

fe00::0 ip6-mcastprefix

fe00::1 ip6-allnodes

fe00::2 ip6-allrouters

172.27.14.197   hostname-test-cby-86df45bf-9fx5n



# Entries added by HostAliases.

192.168.1.1     cby     cby.chenby.cn

192.168.1.10    chenby  chenby.chenby.cn

root@hostname-test-cby-86df45bf-9fx5n:/#



# 查看环境变量

root@hostname-test-cby-86df45bf-9fx5n:/# echo $cby

chenby

root@hostname-test-cby-86df45bf-9fx5n:/#