☂️-Issue reduce container capabilities

[majst01]

Reduce capabilities of our containers found by https://github.com/bridgecrewio/checkov:

• audittailer:

  • CKV_K8S_28 "Minimize the admission of containers with the NET_RAW capability"
  • CKV_K8S_15 "Image Pull Policy should be Always
  • CKV_K8S_20 "Containers should not run with allowPrivilegeEscalation"
  • CKV_K8S_38 "Ensure that Service Account Tokens are only mounted where necessary"

• csi-lvm-controller

  • CKV_K8S_28 "Minimize the admission of containers with the NET_RAW capability"
  • CKV_K8S_23 "Minimize the admission of root containers"
  • CKV_K8S_20 "Containers should not run with allowPrivilegeEscalation"
  • CKV_K8S_38 "Ensure that Service Account Tokens are only mounted where necessary"
  • CKV_K8S_40 "Containers should run as a high UID to avoid host conflict"

• droptailer

  • CKV_K8S_28 "Minimize the admission of containers with the NET_RAW capability"
  • CKV_K8S_20 "Containers should not run with allowPrivilegeEscalation"

• metallb-system-controller

  • CKV_K8S_28 "Minimize the admission of containers with the NET_RAW capability"
  • CKV_K8S_20 "Containers should not run with allowPrivilegeEscalation"
  • CKV_K8S_38 "Ensure that Service Account Tokens are only mounted where necessary"

CKV_K8S_15 is kept as it is because we always have semver versioning for images in place without the ability to override a already pushed image.
CKV_K8S_40 is not changed because we do not write from our containers.

Gardener components

These needs to be fixed at gardener

• blackbox-exporter

  • CKV_K8S_28 "Minimize the admission of containers with the NET_RAW capability"
  • CKV_K8S_20 "Containers should not run with allowPrivilegeEscalation"
  • CKV_K8S_38 "Ensure that Service Account Tokens are only mounted where necessary"

• calico-node-vertical-autoscaler

  • CKV_K8S_28 "Minimize the admission of containers with the NET_RAW capability"
  • CKV_K8S_20 "Containers should not run with allowPrivilegeEscalation"
  • CKV_K8S_38 "Ensure that Service Account Tokens are only mounted where necessary"

• coredns

  • CKV_K8S_38 "Ensure that Service Account Tokens are only mounted where necessary"

• metrics-server

  • CKV_K8S_28 "Minimize the admission of containers with the NET_RAW capability"
  • CKV_K8S_20 "Containers should not run with allowPrivilegeEscalation"
  • CKV_K8S_38 "Ensure that Service Account Tokens are only mounted where necessary"

• vpn-shoot

  • CKV_K8S_28 "Minimize the admission of containers with the NET_RAW capability"
  • CKV_K8S_23 "Minimize the admission of root containers"
  • CKV_K8S_20 "Containers should not run with allowPrivilegeEscalation"
  • CKV_K8S_25 "Minimize the admission of containers with added capability"
  • CKV_K8S_40 "Containers should run as a high UID to avoid host conflict"