How do I do this deployment by command line

Question

I can do a deploy like this, but cannot do it via command line.

I was looking at doing it like this

kubectl create -f kubernetes-rc.json

---

{
  "kind": "ReplicationController",
  "apiVersion": "v1",
  "metadata": {
    "name": "foo-frontend-rc",
    "labels": {
      "www": true
    },
    "namespace": "foo"
  },
  "spec": {
    "replicas": 1,
    "template": {
      "metadata": {
        "labels": {
          "app": "foo-frontend"
        }
      },
      "spec": {
        "containers": [
          {
            "name": "foo-frontend",
            "image": "gcr.io/atomic-griffin-130023/foo-frontend:b3fc862",
            "ports": [
              {
                "containerPort": 3009,
                "protocol": "TCP"
              }
            ],
            "imagePullPolicy": "IfNotPresent"
          }
        ],
        "restartPolicy": "Always",
        "dnsPolicy": "ClusterFirst"
      }
    }
  }
}

---

and

kubectl create -f kubernetes-service.json

---

{
  "kind": "Service",
  "apiVersion": "v1",
  "metadata": {
    "name": "foo-frontend-service"
  },
  "spec": {
    "selector": {
      "app": "foo-frontend-rc"
    },
    "ports": [
      {
        "protocol": "TCP",
        "port": 80,
        "targetPort": 3009
      }
    ]
  }
}

to no avail. It creates the rc, but it won’t expose the service externally.

Answer 1

Your service's selector is wrong. It should be selecting a label from the pod template, not a label on the RC itself.

If you change the following in your service:

"selector": {
  "app": "foo-frontend-rc"
},

to:

"selector": {
  "app": "foo-frontend"
},

It should fix it.

---

Update

Change your service definition to

{
  "kind": "Service",
  "apiVersion": "v1",
  "metadata": {
    "name": "foo-frontend-service"
  },
  "spec": {
    "selector": {
      "app": "foo-frontend"
    },
    "ports": [
      {
        "protocol": "TCP",
        "port": 80,
        "targetPort": 3009,
        "nodePort": 30009
      }
    ],
    "type": "LoadBalancer"
  }
}