NGF fails to deploy on Openshift

[bjee19]

Describe the bug
NGF fails to deploy on Openshift when using helm chart

output:

[cloud-user@ocp-provisioner nginx-gateway-fabric]$ helm install ngf oci://ghcr.io/nginxinc/charts/nginx-gateway-fabric --create-namespace -n nginx-gateway
Pulled: ghcr.io/nginxinc/charts/nginx-gateway-fabric:1.1.0
Digest: sha256:2a3aa5e2b61334a135b909f389b190ed9514b2d77c529068eb3bef4e08d0f7ec
W0312 16:49:51.427508   14348 warnings.go:70] would violate PodSecurity "restricted:v1.24": allowPrivilegeEscalation != false (container "nginx" must set securityContext.allowPrivilegeEscalation=false), unrestricted capabilities (container "nginx-gateway" must not include "KILL" in securityContext.capabilities.add), seccompProfile (pod or containers "nginx-gateway", "nginx" must set securityContext.seccompProfile.type to "RuntimeDefault" or "Localhost")

Deployment is created with this condition:

status:
  conditions:
  - lastTransitionTime: "2024-03-12T20:49:51Z"
    lastUpdateTime: "2024-03-12T20:49:51Z"
    message: Created new replica set "ngf-nginx-gateway-fabric-777dc84497"
    reason: NewReplicaSetCreated
    status: "True"
    type: Progressing
  - lastTransitionTime: "2024-03-12T20:49:51Z"
    lastUpdateTime: "2024-03-12T20:49:51Z"
    message: Deployment does not have minimum availability.
    reason: MinimumReplicasUnavailable
    status: "False"
    type: Available
  - lastTransitionTime: "2024-03-12T20:49:51Z"
    lastUpdateTime: "2024-03-12T20:49:51Z"
    message: 'pods "ngf-nginx-gateway-fabric-777dc84497-" is forbidden: unable to
      validate against any security context constraint: [provider "anyuid": Forbidden:
      not usable by user or serviceaccount, provider restricted-v2: .spec.securityContext.fsGroup:
      Invalid value: []int64{1001}: 1001 is not an allowed group, spec.containers[0].securityContext.runAsUser:
      Invalid value: 102: must be in the ranges: [1000700000, 1000709999], spec.containers[0].securityContext.capabilities.add:
      Invalid value: "KILL": capability may not be added, spec.containers[1].securityContext.runAsUser:
      Invalid value: 101: must be in the ranges: [1000700000, 1000709999], provider
      "restricted": Forbidden: not usable by user or serviceaccount, provider "nonroot-v2":
      Forbidden: not usable by user or serviceaccount, provider "nonroot": Forbidden:
      not usable by user or serviceaccount, provider "hostmount-anyuid": Forbidden:
      not usable by user or serviceaccount, provider "machine-api-termination-handler":
      Forbidden: not usable by user or serviceaccount, provider "hostnetwork-v2":
      Forbidden: not usable by user or serviceaccount, provider "hostnetwork": Forbidden:
      not usable by user or serviceaccount, provider "hostaccess": Forbidden: not
      usable by user or serviceaccount, provider "node-exporter": Forbidden: not usable
      by user or serviceaccount, provider "privileged": Forbidden: not usable by user
      or serviceaccount]'
    reason: FailedCreate
    status: "True"
    type: ReplicaFailure
  observedGeneration: 1
  unavailableReplicas: 1

To Reproduce

1. Create Openshift cluster
2. Install gateway api resources
3. Run helm install ngf oci://ghcr.io/nginxinc/charts/nginx-gateway-fabric --create-namespace -n nginx-gateway

Expected behavior
NGF deploys correctly.

Your environment

• Version of the NGINX Gateway Fabric - 1.1.0
• Version of Kubernetes - 1.25.10
• Kubernetes platform (e.g. Mini-kube or GCP) - Openshift v4.12.20

[sjberman]

Ah of course, OpenShift. We'll need to create a SecurityContextConstraint that has the proper permissions to deploy NGF.

[sy-be]

Would be great to have this documented and why we need these extra capabilities, especially the KILL.

[mpstefan]

We may be able to look at NIC's SCC available here

[sjberman]

We'll also probably require a field in our helm chart to say whether we are on kubernetes or openshift to determine whether or not to create the SCC when installing.

An update to our installation docs will be required to explain this, and we should also add a reference doc to describe the permissions we use and why we use them.