如何在k8s节点上启用具有相同端口的多个Pod?

时间:2019-03-27 17:45:13

标签: jenkins kubernetes continuous-integration

我得到了:
 0/3 nodes are available: 3 node(s) didn't have free ports for the requested pod ports.
尝试在同一k8s节点上运行多个jenkins从站。

每个pod都公开了相同的端口,这使得不可能在同一节点上运行2个相同的pod。
我有一个带有负载均衡器的服务-但它不能解决问题。

是否有可能创建一个服务,该服务将为创建的每个吊舱生成随机端口?

谢谢!

编辑: 这是配置的服务:

{
  "kind": "Service",
  "apiVersion": "v1",
  "metadata": {
    "name": "jnlp",
    "namespace": "default",
    "selfLink": "/api/v1/namespaces/default/services/jnlp",
    "uid": "345230eb-5078-11e9-959a-1690183aeeb4",
    "resourceVersion": "90390",
    "creationTimestamp": "2019-03-27T10:08:01Z",
    "annotations": {.....}
  },
  "spec": {
    "ports": [
      {
        "name": "ssh",
        "protocol": "TCP",
        "port": 22,
        "targetPort": 22,
        "nodePort": 32417
      }
    ],
    "selector": {
      "app": "jnlp"
    },
    "clusterIP": "....",
    "type": "LoadBalancer",
    "sessionAffinity": "None",
    "externalTrafficPolicy": "Cluster"
  },
  "status": {
    "loadBalancer": {
      "ingress": [
        {
          "ip": "......"
        }
      ]
    }
  }
}

jenkins配置:

podTemplate(label: slave, 
containers: [
    containerTemplate(name: 'mongodb',
            image: mongo_image,
            ttyEnabled: true,
            ports: [portMapping(name: 'mongo', containerPort: 27017, hostPort: 27017)],
    ),
    containerTemplate(name: 'elasticsearch',
            image: elastic_image,
            ttyEnabled: true,
            ports: [portMapping(name: 'elastic', containerPort: 9200, hostPort: 9200)],
    ),
    containerTemplate(name: 'jnlp',
            image: "******:${CONTAINER_TAG}",
            command: 'jenkins-slave',
            alwaysPullImage: true,
            privileged: true,
            label: 'jnlp', 
            envVars: [
                    envVar(key: 'HOME', value: "${JENKINS_HOME}"),
            ])
],
        imagePullSecrets: ['*******'],
        podRetention: always()
)

1 个答案:

答案 0 :(得分:0)

您不能让多个Pod使用相同的nodePort,因为这是您将绑定到Pod的实际计算机上的端口。由于您使用的是负载平衡器,因此我看不到为什么需要使用nodePorts。如果您绝对不需要使用nodePorts,只需将其从服务中删除即可。