Guide to the Secure Configuration of Red Hat OpenShift Container Platform 4
Rules, Groups, and Values defined within the XCCDF Benchmark
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Configure Kubernetes API Server Maximum Audit Log Size
To rotate audit logs upon reaching a maximum size, edit the <code>openshift-kube-apiserver</code> configmap and set the <code>audit-log-maxsize</code> parameter to an appropriate size in MB. For ex...Rule Medium Severity -
Configure the Audit Log Path
To enable auditing on the Kubernetes API Server, the audit log path must be set. Edit the <code>openshift-kube-apiserver</code> configmap and set the <code>audit-log-path</code> to a suitable path ...Rule High Severity -
The authorization-mode cannot be AlwaysAllow
Do not always authorize all requests.Rule Medium Severity -
Ensure authorization-mode Node is configured
Restrict kubelet nodes to reading only objects associated with them.Rule Medium Severity -
Ensure authorization-mode RBAC is configured
To ensure OpenShift restricts different identities to a defined set of operations they are allowed to perform, check that the API server's <code>authorization-mode</code> configuration option list ...Rule Medium Severity -
Disable basic-auth-file for the API Server
Basic Authentication should not be used for any reason. If needed, edit API Edit the <code>openshift-kube-apiserver</code> configmap and remove the <code>basic-auth-file</code> parameter: <pre> "ap...Rule Medium Severity -
Ensure that the bindAddress is set to a relevant secure port
The bindAddress is set by default to0.0.0.0:6443, and listening with TLS enabled.Rule Low Severity -
Ensure the openshift-oauth-apiserver service uses TLS
By default, the OpenShift API Server uses TLS. HTTPS should be used for connections between openshift-apiserver and kube-apiserver. By default, the OpenShift OAuth API Server uses Intermediate prof...Rule Medium Severity -
Configure the etcd Certificate Authority for the API Server
To ensure etcd is configured to make use of TLS encryption for client connections, follow the OpenShift documentation and setup the TLS connection between the API Server and etcd. Then, verify that...Rule Medium Severity -
Configure the etcd Certificate for the API Server
To ensure etcd is configured to make use of TLS encryption for client communications, follow the OpenShift documentation and setup the TLS connection between the API Server and etcd. Then, verify t...Rule Medium Severity -
Configure the etcd Certificate Key for the API Server
To ensure etcd is configured to make use of TLS encryption for client communications, follow the OpenShift documentation and setup the TLS connection between the API Server and etcd. Then, verify t...Rule Medium Severity -
Ensure that the --kubelet-https argument is set to true
The kube-apiserver ensures https to the kubelet by default. The apiserver flag "--kubelet-https" is deprecated and should be either set to "true" or omitted from the argument list.Rule Medium Severity -
Disable Use of the Insecure Bind Address
OpenShift should not bind to non-loopback insecure addresses. Edit the <code>openshift-kube-apiserver</code> configmap and remove the <code>insecure-bind-address</code> if it exists: <pre> "apiServ...Rule Medium Severity -
Profiling is protected by RBAC
Ensure that the cluster-debugger cluster role includes the /metrics resource URL. This demonstrates that profiling is protected by RBAC, with a specific cluster role to allow access.Rule Medium Severity -
Configure the kubelet Certificate Authority for the API Server
To ensure OpenShift verifies kubelet certificates before establishing connections, follow the OpenShift documentation and setup the TLS connection between the API Server and kubelets. Edit the <co...Rule High Severity -
Configure the kubelet Certificate File for the API Server
To enable certificate based kubelet authentication, edit the <code>config</code> configmap in the <code>openshift-kube-apiserver</code> namespace and set the below parameter in the <code>config.yam...Rule High Severity -
Configure the kubelet Certificate File for the API Server
To enable certificate based kubelet authentication, edit the <code>config</code> configmap in the <code>openshift-kube-apiserver</code> namespace and set the below parameter in the <code>config.yam...Rule High Severity -
Configure the kubelet Certificate Key for the API Server
To enable certificate based kubelet authentication, edit the <code>config</code> configmap in the <code>openshift-kube-apiserver</code> namespace and set the below parameter in the <code>config.yam...Rule High Severity -
Configure the kubelet Certificate Key for the API Server
To enable certificate based kubelet authentication, edit the <code>config</code> configmap in the <code>openshift-kube-apiserver</code> namespace and set the below parameter in the <code>config.yam...Rule High Severity -
Ensure all admission control plugins are enabled
To make sure none of them is explicitly disabled except PodSecurity, run the following command: <pre>$ oc -n openshift-kube-apiserver get configmap config -o json | jq -r '[.data."config.yaml" | fr...Rule Medium Severity
Node 2
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