k8s shared process docs sample - doesn't quite work

 

In the example, the following yaml is given but when it ask you to do 

kubectl attach -it nginx -c shell

It will go into a black hole. To resolve this, try 

kubectl exec -it nginx -c shell sh

apiVersion: v1

kind: Pod

metadata:

  name: nginx

spec:

  shareProcessNamespace: true

  containers:

  - name: nginx

    image: nginx

  - name: shell

    image: ubuntu

    command: ["sleep", "3600"]

    securityContext:

      capabilities:

        add:

        - SYS_PTRACE

    stdin: true

    tty: true