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Create a custom pod security policy

Contributors netapp-rlithman
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Astra Control needs to create and manage Kubernetes pods on the clusters it manages. If your cluster uses a restrictive pod security policy that doesn't allow privileged pod creation or allow processes within the pod containers to run as the root user, you need to create a less restrictive pod security policy to enable Astra Control to create and manage these pods.

Steps

  1. Create a pod security policy for the cluster that is less restrictive than the default, and save it in a file. For example:

    apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
  name: astracontrol
  annotations:
    seccomp.security.alpha.kubernetes.io/allowedProfileNames: '*'
spec:
  privileged: true
  allowPrivilegeEscalation: true
  allowedCapabilities:
  - '*'
  volumes:
  - '*'
  hostNetwork: true
  hostPorts:
  - min: 0
    max: 65535
  hostIPC: true
  hostPID: true
  runAsUser:
    rule: 'RunAsAny'
  seLinux:
    rule: 'RunAsAny'
  supplementalGroups:
    rule: 'RunAsAny'
  fsGroup:
    rule: 'RunAsAny'

  2. Create a new role for the pod security policy.

    kubectl-admin create role psp:astracontrol \
    --verb=use \
    --resource=podsecuritypolicy \
    --resource-name=astracontrol

  3. Bind the new role to the service account.

    kubectl-admin create rolebinding default:psp:astracontrol \
    --role=psp:astracontrol \
    --serviceaccount=astracontrol-service-account:default