Ensure containers do not share host IPC namespace

Error: Containers share host IPC namespace

Bridgecrew Policy ID: BC_K8S_17
Checkov Check ID: CKV_K8S_18
Severity: MEDIUM

Containers share host IPC namespace

Description

Pods share many resources, so it could make sense to share a process namespace. Some container images may expect to be isolated from other containers. Not sharing IPC namespaces helps ensure isolation. Containers in different pods have distinct IP addresses and will need special configuration to communicate by IPC.

Fix - Buildtime

Kubernetes

  • Resource: Pod / Deployment / DaemonSet / StatefulSet / ReplicaSet / ReplicationController / Job / CronJob
  • Argument: hostIPC (Optional)
    If true, the Pod uses the host's IPC namespace. Default to false.
apiVersion: v1
kind: Pod
metadata:
  name: <name>
spec:
- hostIPC: true
apiVersion: batch/v1beta1
kind: CronJob
metadata:
  name: <name>
spec:
  schedule: <>
  jobTemplate:
    spec:
      template:
        spec:
-          hostIPC: true
apiVersion: <>
kind: <kind>
metadata:
  name: <name>
spec:
  template:
    spec:
-       hostIPC: true

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