Ensure that a unique Certificate Authority is used for etcd (etcd) (Openshift)

Risk Level: Informational
Cloud Entity: Pods
CloudGuard Rule ID: D9.K8S.CRY.40
Covered by Spectral: No
Category: Compute

GSL LOGIC

KubernetesPod where labels contain [value='etcd'] and namespace = 'openshift-etcd' should have spec.containers with [parsedArgs contain [key like 'trusted-ca-file' and value like '/etc/kubernetes/static-pod-certs/configmaps/etcd-serving-ca/ca-bundle.crt%'] and parsedArgs contain [key like 'peer-trusted-ca-file' and value like '/etc/kubernetes/static-pod-certs/configmaps/etcd-peer-client-ca/ca-bundle.crt%']]

REMEDIATION

None required. Certificates for etcd are managed by the OpenShift cluster
etcd operator.

References

1. https://docs.openshift.com/container-platform/4.5/security/certificate-types-descriptions.html#etcd-certificates_ocp-certificates
2. https://github.com/openshift/cluster-etcd-operator
3. https://github.com/openshift/cluster-etcd-operator/blob/release-4.5/bindata/etcd/pod.yaml#L154-L167
4. https://github.com/openshift/cluster-etcd-operator/blob/master/bindata/etcd/pod.yaml#L154-L167
5. https://etcd.io/

Pods

Pods are the smallest deployable units of computing that can be created and managed in Kubernetes.A Pod is a group of one or more containers (such as Docker containers), with shared storage/network, and a specification for how to run the containers.

Compliance Frameworks

• CIS OpenShift Container Platform v4 Benchmark v1.1.0
• CIS OpenShift Container Platform v4 Benchmark v1.4.0