I am testing out a kubernetes 1.1.7 setup (on AWS). This has been installed following standard procedures (http://kubernetes.io/v1.1/docs/getting-started-guides/aws.html) and it's all working fine.

I have tried to fireup the most simple replication controller of a pod with two containers (because I wanted to play around multi-container pods, which are not the norm but still something that could be done). This is the RC:

apiVersion: v1
kind: Pod
metadata:
  name: test
  labels:
    app: web
spec:
  containers:
    - name: "80"
      image: "jonlangemak/docker:web_container_80"
      ports:
        - containerPort: 80
    - name: "8080"
      image: "jonlangemak/docker:web_container_8080"
      ports:
        - containerPort: 8080

I was expecting this to generate 2 application containers as well as a system container "pause" which would hold the two port mappings (80 and 8080).

However, if I go on the landing host and I do a docker ps this is what I see:

CONTAINER ID        IMAGE                                                 COMMAND                CREATED             STATUS              PORTS               NAMES
2a15f633fff9        jonlangemak/docker:web_container_8080                 "/usr/bin/supervisor   23 seconds ago      Up 22 seconds                           k8s_8080.cf4f64ab_test_default_1dc9f591-d976-11e5-88b3-06da266e4957_6e389304                                                                                
0ff0b6cdd4ae        jonlangemak/docker:web_container_80                   "/usr/bin/supervisor   23 seconds ago      Up 23 seconds                           k8s_80.b7c46373_test_default_1dc9f591-d976-11e5-88b3-06da266e4957_90173279                                                                                  
84e3d7ea12c9        gcr.io/google_containers/pause:0.8.0                  "/pause"               23 seconds ago      Up 23 seconds                           k8s_POD.c16231a_test_default_1dc9f591-d976-11e5-88b3-06da266e4957_78c2a5e9            

Interestingly, everything works fine and I can curl the pod IP for both port 80 and port 8080 and I get what I am expecting to get BUT the fact that I don't see the proper port mappings on the "pause" container leaves me a bit "uh? why?".

Thoughts?

Thanks.