Need help running two OS containers in a single pod on kubernetes - docker

Question

I'm still new to Kubernetes. I'm trying to run a ubuntu container and a linux kali container within the same pod on kubernetes. I also need those two containers to be able to be accessed from a browser. My approach right now is using ubuntu and kali docker image with VNC installed.
Here are the docker image that I'm trying to use:
https://hub.docker.com/r/consol/ubuntu-xfce-vnc (Ubuntu image)
https://hub.docker.com/r/jgamblin/kalibrowser-lxde (Kali image)
Here is the YAML file for creating the pod:
apiVersion: v1
kind: Pod
metadata:
name: training
labels:
app: training
spec:
containers:
- name: kali
image: jgamblin/kalibrowser-lxde
ports:
- containerPort: 6080
- name: centos
image: consol/centos-xfce-vnc
ports:
- containerPort: 5901
Here's the problem. When I run the pod with those 2 containers, only the Kali container is having issue running, cause it to keep on restarting.
May I know how I can achieve this?

Answer 1

You can add a simple sleep command to be executed inside then container to keep it running, for example:
apiVersion: v1
kind: Pod
metadata:
name: training
labels:
app: training
spec:
containers:
- name: kali
image: jgamblin/kalibrowser-lxde
ports:
- containerPort: 6080
command: ["bash", "-c"]
args: ["sleep 500"]
- name: centos
image: consol/centos-xfce-vnc
ports:
- containerPort: 5901`
This way the pod will be in running state:
kubectl get pod
NAME READY STATUS RESTARTS AGE
training 2/2 Running 0 81s

Answer 2

jgamblin/kalibrowser-lxde image require tty (display) allocation.
You can see an example command on docker hub page.
Then you should allow it in your Pod manifest:
apiVersion: v1
kind: Pod
metadata:
name: training
labels:
app: training
spec:
containers:
- name: kali
image: jgamblin/kalibrowser-lxde
ports:
- containerPort: 6080
tty: true
- name: centos
image: consol/centos-xfce-vnc
ports:
- containerPort: 5901
Put tty: true in kali container declaration.