Outcold Solutions LLC

Monitoring OpenShift - Version 4

Forwarding Audit Logs

Our solution provides detailed Audit dashboards. By default, OpenShift does not provide audit logs. You can enable them by following instructions from OpenShift documentation Master and Node Configuration/Advanced Audit .

You need to enable audit log only on Masters. For that, you need to edit master-config.yaml file.

sudo vi /etc/origin/master/master-config.yaml

And add configuration, to keep for example audit for the last 10 days or maximum of 3 files with the size of 10 megabytes.

auditConfig:
  auditFilePath: "/var/log/audit-ocp.log"
  enabled: true
  maximumFileRetentionDays: 10
  maximumFileSizeMegabytes: 10
  maximumRetainedFiles: 3
  policyFile: "/etc/origin/master/audit-policy.yaml"
  logFormat: json

Collector automatically forwards logs from /var/log/, no additional configuration is required in the collector.

You need to create an audit-policy.yaml in the specified path.

sudo vi /etc/origin/master/audit-policy.yaml
You can use the example provided by OpenShift.
apiVersion: audit.k8s.io/v1beta1
kind: Policy
rules:

  # Do not log from very verbose system accounts
  - level: None
    users:
    - system:apiserver
    - system:kube-controller-manager
    - system:kube-scheduler
    - system:openshift-master

  # Do not log watch requests by the "system:kube-proxy" on endpoints or services
  - level: None
    users: ["system:kube-proxy"]
    verbs: ["watch"]
    resources:
    - group: ""
      resources: ["endpoints", "services"]

  # Do not log authenticated requests to certain non-resource URL paths.
  - level: None
    userGroups: ["system:authenticated"]
    nonResourceURLs:
    - "/api*" # Wildcard matching.
    - "/version"

  # Log the request body of configmap changes in kube-system.
  - level: Request
    resources:
    - group: "" # core API group
      resources: ["configmaps"]
    # This rule only applies to resources in the "kube-system" namespace.
    # The empty string "" can be used to select non-namespaced resources.
    namespaces: ["kube-system"]

  # Log configmap and secret changes in all other namespaces at the metadata level.
  - level: Metadata
    resources:
    - group: "" # core API group
      resources: ["secrets", "configmaps"]

  # Log all other resources in core and extensions at the request level.
  - level: Request
    resources:
    - group: "" # core API group
    - group: "extensions" # Version of group should NOT be included.

  # A catch-all rule to log all other requests at the Metadata level.
  - level: Metadata

Restart services after making changes.

sudo systemctl restart atomic-openshift-master-api atomic-openshift-master-controllers

Application has a macro, that defines how to find the audit logs macro_openshift_audit_logs.

(`macro_openshift_host_logs` "audit.k8s.io")

About Outcold Solutions

Outcold Solutions provides solutions for monitoring Kubernetes, OpenShift and Docker clusters in Splunk Enterprise and Splunk Cloud. We offer certified Splunk applications, which gives you insights across all containers environments. We are helping businesses reduce complexity related to logging and monitoring by providing easy-to-use and deploy solutions for Linux and Windows containers. We deliver applications, which helps developers monitor their applications and operators to keep their clusters healthy. With the power of Splunk Enterprise and Splunk Cloud, we offer one solution to help you keep all the metrics and logs in one place, allowing you to quickly address complex questions on container performance.