If a pod requires a serviceaccount, the simulated pod won't run

[drmorr0]

Describe the bug

If a pod has the serviceAccount field set in the trace, then the simulated version of the pod won't run because the serviceAccount doesn't exist in the virtualized namespace.

Steps to reproduce

1. Create a trace with a deployment like the following:

piVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  namespace: default
spec:
  selector:
    matchLabels:
      app: nginx
  replicas: 2 # tells deployment to run 2 pods matching the template
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80
      serviceAccount: foobar

2. Try to run the trace in SimKube
3. The pods won't be scheduled, because of the following error:

Error creating: pods "nginx-deployment-6bdc77d84d-" is forbidden: error looking up service account default/foobar: serviceaccount "foobar" not found

Expected behavior

The pod should get scheduled in the simulated cluster.

Additional Info

Kubernetes Version: any
Environment (kind, EKS, self-managed/hosted, etc.): any
Affected components (sk-vnode, sk-cloudprov, sk-ctrl, sk-driver, skctl, sk-tracer): sk-driver

[drmorr0]

You "should" be able to resolve this by including the serviceAccount object in the trace_config, but I'd like to have a solution that doesn't require that.