[kubernetes]-使用k8s运行dubbo服务

ゞ浴缸里的玫瑰 2023-02-25 08:45 9阅读 0赞

先拿自己的base镜像 也就是之前在容器里跑的镜像做一下修改。

在tomcat的bin路径下创建一个k8s-start.sh 内容如下

sh /srv/tomcat/tomcat-haozhuo-video/bin/startup.sh
    tailf  /srv/tomcat/tomcat-haozhuo-video/logs/catalina.out

然后给k8s-start.sh加上执行权限

chmod +x k8s-start.sh

commit镜像 并上传仓库

docker commit -m "edit k8s-start.sh"  test-video  registry.cn-shanghai.aliyuncs.com/yjk-datag/haozhuo-video:vtest05
    docker push registry.cn-shanghai.aliyuncs.com/yjk-datag/haozhuo-video:vtest05

基于05创建镜像vtest06的Dockerfile

From registry.cn-shanghai.aliyuncs.com/yjk-datag/haozhuo-video:vtest05
    MAINTAINER PDABC Enterprise Container Images <xujiamin@hz-health.cn>
    
    ENTRYPOINT ["/bin/sh", "/srv/tomcat/tomcat-haozhuo-video/bin/k8s-start.sh"]

启动感觉换成jar包启动会更好 这样1号进程就是启动进程了。现在还是丢在tomcat里的

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pod创建过程如下

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yaml文件如下

apiVersion: apps/v1
    kind: Deployment
    metadata:
    # deployment名字 和svc 和ingress绑定没关系
      name: haozhuo-video-dp
      namespace: test
    spec:
      replicas: 1
      # 在定义模板的时候必须定义labels,因为Deployment.spec.selector是必须字段,而他又必须和template.labels对应
      selector:
        matchLabels:
          app: haozhuo-video
      # template里面定义的内容会应用到下面所有的副本集里面(例如depolyment下的pod),在template.spec.containers里面不能定义labels标签。可以kubectl get pods --show-labels查看
      template:
        metadata:
          labels:
            app: haozhuo-video
            env: test
        spec:
          containers:
          # containers名字 和svc 和ingress绑定没关系
          - name: haozhuo-video
            image: registry.cn-shanghai.aliyuncs.com/yjk-datag/haozhuo-video:vtest06
            env:
            - name: DUBBO_IP_TO_REGISTRY
              valueFrom:
                fieldRef:
                  fieldPath: status.hostIP
            - name: DUBBO_PORT_TO_REGISTRY
              value: "20920"
            resources:
              limits:
                cpu: 2000m
                memory: 2048Mi
              requests:
                cpu: 1000m
                memory: 1024Mi
            ports:
            - name: liveness-port
              containerPort: 8080
              hostPort: 8820
            - name: readiness-port
              containerPort: 20920
              hostPort: 20920
    
            livenessProbe:
              tcpSocket:
                port: liveness-port
              initialDelaySeconds: 20
              periodSeconds: 3
    
            readinessProbe:
              tcpSocket:
                port: readiness-port
              initialDelaySeconds: 30
              periodSeconds: 10
    
          imagePullSecrets:
          - name: aliyun-ns-test

如果不加上env参数注册dubbo的ip会变成pod的ip 不是host的ip 访问会有问题

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加上env那块的参数 注册上就正常 显示host的ip 这回到node2上了

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ip已经变成node的ip了

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telnet 一下主机的8820和20920 分别对应容器内8080的tomcat端口，以及20920的dubbo端口

8820

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20920

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测试杀掉tomcat的进程 关闭8080端口

发现容器重启了 tty也断开了

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容器状态从ready 1/1变成0/1，再通过重启 变成1/1

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杀死tailf 进程也是一样的效果

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资源限制也获取的到

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[format_png]: /images/20230209/b47cfce1dff3467a9a52727468678f04.png
[format_png 1]: /images/20230209/01b4b4d96d2f4a559777bfb1dd07956b.png
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[format_png 3]: /images/20230209/1f45b293eeae4f4cbc26de026e98b46b.png
[format_png 4]: /images/20230209/e0d5427697854d0da50e775ede06be24.png
[format_png 5]: /images/20230209/6cec1148607745759695ec5eadcffa64.png
[format_png 6]: /images/20230209/01553823960441e994e5f25ca3b6f8f5.png
[format_png 7]: /images/20230209/40241c6a08b7448c8d6d0189bf6122f6.png
[format_png 8]: https://imgconvert.csdnimg.cn/aHR0cHM6Ly9naXRlZS5jb20vamlhbWlueHUvQmxvZ0ltYWdlL3Jhdy9tYXN0ZXIvaW1nLzIwMjAwNzEwMTQyMjI2LnBuZw?x-oss-process=image/format,png
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