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V-260944

CAT II (Medium)

Older Universal Control Plane (MKE) and Docker Trusted Registry (DTR) images must be removed from all cluster nodes upon upgrading.

Rule ID

SV-260944r966189_rule

STIG

Mirantis Kubernetes Engine Security Technical Implementation Guide

Version

V2R1

CCIs

CCI-002617

Discussion

When upgrading either the UCP or DTR components of MKE, the newer images are pulled (or unpacked if offline) onto engine nodes in a cluster. Once the upgrade is complete, one must manually remove all old image version from the cluster nodes to meet the requirements of this control. When upgrading the Docker Engine - Enterprise component of MKE, the old package version is automatically replaced.

Check Content

Verify all outdated MKE and DTR container images have been removed from all nodes in the cluster.

Via CLI: As an MKE admin, execute the following command using a client bundle:

docker images --filter reference='mirantis/[ucp]*'
docker images --filter reference='registry.mirantis.com/msr/[msr]*'

Verify there are no tags listed older than the currently installed versions of MKE and DTR.

If any of the tags listed are older than the currently installed versions of MKE and DTR, then this is a finding. If no tags are listed, this is not a finding.

Fix Text

Remove all outdated MKE and DTR container images from all nodes in the cluster:

Via CLI: As an MKE admin, execute the following commands using a client bundle:

docker rmi -f $(docker images --filter reference='mirantis/ucp*:[outdated_tags]' -q)
docker rmi -f $(docker images --filter reference='registry.mirantis.com/msr/[msr]*:[outdated_tags]' -q)