Change thread namespace

The Change thread namespace event in a Kubernetes cluster indicates that a process has attempted to change its thread namespace.
This event can be triggered by a container attempting to escape its namespace and gain access to resources outside of its intended scope.
It is important to investigate this event as it may indicate a potential security breach or unauthorized access attempt within the cluster.

To investigate the Change thread namespace event in a Kubernetes cluster, you can:

Use the kubectl get pods command to list all running pods in the cluster and identify the pod associated with the event.
Use the kubectl logs <pod-name> command to view the logs of the identified pod and look for any suspicious activities or error messages related to namespace changes.
Analyze the pod’s security context and ensure that appropriate security measures, such as namespace restrictions and RBAC policies, are in place to prevent unauthorized namespace changes.

To remediate the event “Change thread namespace using python kubernetes api”, you can follow these steps using the Python Kubernetes API:

Identify the affected pod:
- Use the Kubernetes API to list all pods in the cluster: kubectl get pods -n <namespace>
- Look for the pod that triggered the event based on the pod name or other identifying information.
Update the pod’s YAML manifest:
- Retrieve the YAML manifest for the affected pod: kubectl get pod <pod-name> -n <namespace> -o yaml > pod.yaml
- Open the pod.yaml file and locate the spec section.
- Find the securityContext section within the spec section.
- Add or modify the securityContext section to set the desired namespace for the pod’s threads. For example:
```
securityContext:
  runAsUser: <user-id>
  runAsGroup: <group-id>
  namespaceOptions:
    hostNetwork: false
    hostIPC: false
    hostPID: false
    shareProcessNamespace: false
    runAsUser: <user-id>
    runAsGroup: <group-id>
    runAsNonRoot: true
```
  Replace <user-id> and <group-id> with the appropriate values.
Apply the updated manifest:
- Apply the changes to the pod: kubectl apply -f pod.yaml -n <namespace>

Note: Make sure you have the necessary permissions to modify pods in the specified namespace.