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copyright
years
2026, 2026
lastupdated 2026-05-14
keywords openshift, benchmarks, 4.21, openshift benchmarks, openshift 4.21, compliance operator, compliance
subcollection openshift

{{site.data.keyword.attribute-definition-list}}

4.21 compliance operator benchmark

{: #benchmarks-421-co}

Review the compliance operator benchmark results for {{site.data.keyword.openshiftlong_notm}} version 4.21. {: shortdesc}

1 Control plane components

{: #control-plane-components-421-co}

1.1 Master node configuration files

{: #master-node-configuration-files-421-co}

The master node configuration is not stored as a set of files; and therefore, rules in section 1.1 are out of the scope of the automated check by the compliance operator.

1.2 API server

{: #api-server-421-co}

Section Recommendation Manual/Automated Level Result
1.2.1 Ensure that anonymous requests are authorized. Automated 1 Not checked
1.2.2 Use https for kubelet connections. Automated 1 Pass
1.2.3 Ensure that the kubelet uses certificates to authenticate. Automated 1 Pass
1.2.4 Verify that the kubelet certificate authority is set as appropriate. Automated 1 Pass
1.2.5 Ensure that the --authorization-mode argument is not set to AlwaysAllow. Automated 1 Pass
1.2.6 Verify that RBAC is enabled. Automated 1 Pass
1.2.7 Ensure that the APIPriorityAndFairness feature gate is enabled. Manual 1 INHERENTLY MET
1.2.8 Ensure that the admission control plug-in AlwaysAdmit is not set. Automated 1 Pass
1.2.9 Ensure that the admission control plug-in AlwaysPullImages is not set. Automated 1 Pass
1.2.10 Ensure that the admission control plug-in ServiceAccount is set. Automated 1 Pass
1.2.11 Ensure that the admission control plug-in NamespaceLifecycle is set. Automated 1 Pass
1.2.12 Ensure that the admission control plug-in SecurityContextConstraint is set. Automated 1 Pass
1.2.13 Ensure that the admission control plug-in NodeRestriction is set. Automated 1 Pass
1.2.14 Ensure that the --insecure-bind-address argument is not set. Automated 1 Pass
1.2.15 Ensure that the --insecure-port argument is set to 0. Manual 1 INHERENTLY MET
1.2.16 Ensure that the --secure-port argument is not set to 0. Automated 1 Pass
1.2.17 Ensure that the healthz endpoint is protected by RBAC. Automated 1 Not checked
1.2.18 Ensure that the --audit-log-path argument is set. Automated 1 Pass
1.2.19 Ensure that the audit logs are forwarded off the cluster for retention. Automated 1 Not checked
1.2.20 Ensure that the maximumRetainedFiles argument is set to 10 or as appropriate. Automated 1 Not checked
1.2.21 Configure Kubernetes API Server Maximum Audit Log Size. Automated 1 Not checked
1.2.22 Ensure that the --request-timeout argument is set. Automated 1 Pass
1.2.23 Ensure that the --service-account-lookup argument is set to true. Automated 1 Pass
1.2.24 Ensure that the --service-account-key-file argument is set as appropriate. Automated 1 Pass
1.2.25 Ensure that the --etcd-certfile and --etcd-keyfile arguments are set as appropriate. Automated 1 Pass
1.2.26 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate. Automated 1 Pass
1.2.27 Ensure that the --client-ca-file argument is set as appropriate. Automated 1 Pass
1.2.28 Ensure that the --etcd-cafile argument is set as appropriate. Automated 1 Pass
1.2.29 Ensure that encryption providers are appropriately configured. Automated 1 Not checked
1.2.30 Ensure that the API Server only makes use of Strong Cryptographic Ciphers. Automated 1 Not checked
1.2.31 Ensure unsupported configuration overrides are not used. Manual 1 Pass
{: caption="Benchmarks for api server." caption-side="top"}

1.3 Controller manager

{: #controller-manager-421-co}

Section Recommendation Manual/Automated Level Result
1.3.1 Ensure that controller manager healthz endpoints are protected by RBAC. Automated 1 Not checked
1.3.2 Ensure that the --use-service-account-credentials argument is set to true. Automated 1 Pass
1.3.3 Ensure that the --service-account-private-key-file argument is set as appropriate. Automated 1 Pass
1.3.4 Ensure that the --root-ca-file argument is set as appropriate. Automated 1 Pass
{: caption="Benchmarks for controller manager." caption-side="top"}

1.4 Scheduler

{: #scheduler-421-co}

Section Recommendation Manual/Automated Level Result
1.4.1 Ensure that the healthz endpoints for the scheduler are protected by RBAC. Automated 1 Not checked
1.4.2 Verify that the scheduler API service is protected by RBAC. Automated 1 Not checked
{: caption="Benchmarks for scheduler." caption-side="top"}

2 Etcd

{: #etcd-421-co}

Section Recommendation Manual/Automated Level Result
2.1 Ensure that the --cert-file and --key-file arguments are set as appropriate. Automated 1 Pass
2.2 Ensure that the --client-cert-auth argument is set to true. Automated 1 Pass
2.3 Ensure that the --auto-tls argument is not set to true. Automated 1 Pass
2.4 Ensure that the --peer-cert-file and --peer-key-file arguments are set as appropriate. Automated 1 Pass
2.5 Ensure that the --peer-client-cert-auth argument is set to true. Automated 1 Pass
2.6 Ensure that the --peer-auto-tls argument is not set to true. Automated 1 Pass
2.7 Ensure that a unique Certificate Authority is used for etcd. Automated 2 Not checked
{: caption="Benchmarks for etcd." caption-side="top"}

3 Control plane configuration

{: #control-plane-configuration-421-co}

3.1 Authentication and authorization

{: #authentication-and-authorization-421-co}

Section Recommendation Manual/Automated Level Result
3.1.1 Client certificate authentication should not be used for users. Automated 2 Pass
{: caption="Benchmarks for authentication and authorization." caption-side="top"}

3.2 Logging

{: #logging-421-co}

Section Recommendation Manual/Automated Level Result
3.2.1 Ensure that a minimal audit policy is created. Automated 1 Not checked
3.2.2 Ensure that the audit policy covers key security concerns. Automated 2 Not checked
{: caption="Benchmarks for logging." caption-side="top"}

4 Worker nodes

{: #worker-nodes-421-co}

4.1 Worker node configuration files

{: #worker-node-configuration-files-421-co}

Section Recommendation Manual/Automated Level Result
4.1.1 Ensure that the kubelet service file permissions are set to 644 or more restrictive. Automated 1 Pass
4.1.2 Ensure that the kubelet service file ownership is set to root:root. Automated 1 Pass
4.1.3 If proxy kube proxy configuration file exists ensure permissions are set to 644 or more restrictive. Automated 1 Not checked
4.1.4 If proxy kubeconfig file exists ensure ownership is set to root:root. Automated 1 Not checked
4.1.5 Ensure that the --kubeconfig`` kubelet.conf file permissions are set to `644` or more restrictive. Automated 1 Pass
4.1.6 Ensure that the --kubeconfig`` kubelet.conf file ownership is set to `root:root`. Automated 1 Pass
4.1.7 Ensure that the certificate authorities file permissions are set to 644 or more restrictive. Automated 1 Pass
4.1.8 Ensure that the client certificate authorities file ownership is set to root:root. Automated 1 Pass
4.1.9 Ensure that the kubelet --config configuration file has permissions set to 600 or more restrictive. Automated 1 Pass
4.1.10 Ensure that the kubelet configuration file ownership is set to root:root. Automated 1 Pass
{: caption="Benchmarks for worker node configuration files." caption-side="top"}

4.2 Kubelet

{: #kubelet-421-co}

Section Recommendation Manual/Automated Level Result
4.2.1 Activate Garbage collection in OpenShift Container Platform 4, as appropriate. Automated 1 Pass
4.2.2 Ensure that the --anonymous-auth argument is set to false. Automated 1 Pass
4.2.3 Ensure that the --authorization-mode argument is not set to AlwaysAllow. Automated 1 Pass
4.2.4 Ensure that the --client-ca-file argument is set as appropriate. Automated 1 Pass
4.2.5 Verify that the read only port is not used or is set to 0. Automated 1 Pass
4.2.6 Ensure that the --streaming-connection-idle-timeout argument is not set to 0. Automated 1 Pass
4.2.7 Ensure that the --make-iptables-util-chains argument is set to true. Automated 1 Pass
4.2.8 Ensure that the kubeAPIQPS [--event-qps] argument is set to a level which ensures appropriate event capture. Automated 2 Pass
4.2.9 Ensure that the --tls-cert-file and --tls-private-key-file arguments are set as appropriate. Automated 1 Pass
4.2.10 Ensure that the --rotate-certificates argument is not set to false. Automated 1 Pass
4.2.11 Verify that the RotateKubeletServerCertificate argument is set to true. Automated 1 Pass
4.2.12 Ensure that the Kubelet only makes use of Strong Cryptographic Ciphers. Automated 1 Pass
{: caption="Benchmarks for kubelet." caption-side="top"}

5 Policies

{: #policies-421-co}

5.1 RBAC and service accounts

{: #rbac-and-service-accounts-421-co}

Section Recommendation Manual/Automated Level Result
5.1.1 Ensure that the cluster-admin role is only used where required. Manual 1 MANUAL
5.1.2 Minimize access to secrets. Manual 1 MANUAL
5.1.3 Minimize wildcard use in Roles and ClusterRoles. Manual 1 MANUAL
5.1.4 Minimize access to create pods. Manual 1 MANUAL
5.1.5 Ensure that default service accounts are not actively used. Manual 1 MANUAL
5.1.6 Ensure that Service Account Tokens are only mounted where necessary. Manual 1 MANUAL
{: caption="Benchmarks for rbac and service accounts." caption-side="top"}

5.2 Security context constraints

{: #security-context-constraints-421-co}

Section Recommendation Manual/Automated Level Result
5.2.1 Minimize the admission of privileged containers. Manual 1 MANUAL
5.2.2 Minimize the admission of containers wishing to share the host process ID namespace. Manual 1 MANUAL
5.2.3 Minimize the admission of containers wishing to share the host IPC namespace. Manual 1 MANUAL
5.2.4 Minimize the admission of containers wishing to share the host network namespace. Manual 1 MANUAL
5.2.5 Minimize the admission of containers with allowPrivilegeEscalation. Manual 1 MANUAL
5.2.6 Minimize the admission of root containers. Manual 2 MANUAL
5.2.7 Minimize the admission of containers with the NET_RAW capability. Manual 1 MANUAL
5.2.8 Minimize the admission of containers with added capabilities. Automated 1 Not checked
5.2.9 Minimize the admission of containers with capabilities assigned. Manual 2 MANUAL
5.2.10 Minimize access to privileged Security Context Constraints. Manual 2 MANUAL
{: caption="Benchmarks for security context constraints." caption-side="top"}

5.3 Network policies and CNI

{: #network-policies-and-cni-421-co}

Section Recommendation Manual/Automated Level Result
5.3.1 Ensure that the CNI in use supports Network Policies. Automated 1 Not checked
5.3.2 Ensure that all Namespaces have Network Policies defined. Manual 2 MANUAL
{: caption="Benchmarks for network policies and CNI." caption-side="top"}

5.4 Secrets management

{: #secrets-management-421-co}

Section Recommendation Manual/Automated Level Result
5.4.1 Prefer using secrets as files over secrets as environment variables. Manual 1 MANUAL
5.4.2 Consider external secret storage. Manual 2 MANUAL
{: caption="Benchmarks for secrets management." caption-side="top"}

5.5 Extensible admission control

{: #extensible-admission-control-421-co}

Section Recommendation Manual/Automated Level Result
5.5.1 Configure Image Provenance using image controller configuration parameters. Automated 2 Not checked
{: caption="Benchmarks for extensible admission control." caption-side="top"}

5.7 General policies

{: #general-policies-421-co}

Section Recommendation Manual/Automated Level Result
5.7.1 Create administrative boundaries between resources using namespaces. Manual 1 MANUAL
5.7.2 Ensure that the seccomp profile is set to docker/default in your pod definitions. Manual 2 MANUAL
5.7.3 Apply Security Context to Your Pods and Containers. Manual 2 MANUAL
5.7.4 The default namespace should not be used. Manual 2 MANUAL
{: caption="Benchmarks for general policies." caption-side="top"}

{{site.data.keyword.IBM_notm}} remediations and explanations

{: #ibm-remediations-and-explanations-421-co}

Section Recommendation/Explanations
1.2.19 Red Hat OpenShift on {{site.data.keyword.IBM_notm}} Cloud can optionally enable Kubernetes API server auditing.
1.2.20 Red Hat OpenShift on {{site.data.keyword.IBM_notm}} Cloud sets the maximumRetainedFiles argument to 1.
1.2.29 Red Hat OpenShift on {{site.data.keyword.IBM_notm}} Cloud can optionally enable a Kubernetes Key Management Service (KMS) provider.
2.7 Red Hat OpenShift on {{site.data.keyword.IBM_notm}} Cloud configures a unique Certificate Authority for etcd.
5.2.8 Red Hat OpenShift on {{site.data.keyword.IBM_notm}} Cloud installs custom SCCs.
5.3.2 Red Hat OpenShift on {{site.data.keyword.IBM_notm}} Cloud has a set of default Calico network policies defined and additional network policies can optionally be added.
{: caption="Details for {{site.data.keyword.IBM_notm}} remediations and explanations" caption-side="top"}