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Chapter 6. Checking audit logs


Audit logs record API requests to the MicroShift API server and can help you identify pod security violations and investigate suspicious requests.

6.1. Identifying pod security violations through audit logs

You can identify pod security admission violations in a workload by viewing the server audit logs. To do this, you must access and parse audit logs to find these violations.

Prerequisites

  • You have installed the jq utility.
  • You have root access to the node.

Procedure

  1. Retrieve the node name by running the following command:

    $ NODE_NAME=$(oc get node -ojsonpath='{.items[0].metadata.name}')
  2. View the available audit logs by running the following command:

    $ oc adm node-logs ${NODE_NAME} --path=kube-apiserver/

    Example output

    rhel-94.lab.local audit-2024-10-18T18-25-41.663.log
    rhel-94.lab.local audit-2024-10-19T11-21-29.225.log
    rhel-94.lab.local audit-2024-10-20T04-16-09.622.log
    rhel-94.lab.local audit-2024-10-20T21-11-41.163.log
    rhel-94.lab.local audit-2024-10-21T14-06-10.402.log
    rhel-94.lab.local audit-2024-10-22T06-35-10.392.log
    rhel-94.lab.local audit-2024-10-22T23-26-27.667.log
    rhel-94.lab.local audit-2024-10-23T16-52-15.456.log
    rhel-94.lab.local audit-2024-10-24T07-31-55.238.log

  3. Parse the audit logs to find pod security violations by running the following command:

    $ oc adm node-logs ${NODE_NAME} --path=kube-apiserver/audit.log \
      | jq -r 'select((.annotations["pod-security.kubernetes.io/audit-violations"] != null) and (.objectRef.resource=="pods")) | .objectRef.namespace + " " + .objectRef.name + " " + .objectRef.resource' \
      | sort | uniq -c
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