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Ensure workloads use resource requests and limits per namespace

An XCCDF Rule

Description

There are two ways to enable resource requests and limits. To create either: A multi-project quota, defined by a ClusterResourceQuota object, allows quotas to be shared across multiple projects. Resources used in each selected project are aggregated and that aggregate is used to limit resources across all the selected projects. A resource quota, defined by a ResourceQuota object, provides constraints that limit aggregate resource consumption per project. It can limit the quantity of objects that can be created in a project by type, as well as the total amount of compute resources and storage that might be consumed by resources in that project. We want to make sure either a ClusterResourceQuota is used in a cluster or a ResourceQuota is used per namespaces.

To configure ClusterResourceQuota, follow the directions in the documentation

To configure ResourceQuota Per Project, follow the directions in the documentation

warning alert: Warning

This rule's check operates on the cluster configuration dump. Therefore, you need to use a tool that can query the OCP API, retrieve the following:
  • /api/v1/resourcequotas API endpoint, filter with with the jq utility using the following filter [.items[] | select((.metadata.namespace | startswith("openshift") | not) and (.metadata.namespace | startswith("kube-") | not) and .metadata.namespace != "default") | .metadata.namespace] | unique and persist it to the local /api/v1/resourcequotas#2e6fd6a1fa7945ee6d06434fd05e4c27822d577045b3d3a4ca5809580cd57f50 file.
  • /api/v1/namespaces API endpoint, filter with with the jq utility using the following filter [.items[] | select((.metadata.name | startswith("openshift") | not) and (.metadata.name | startswith("kube-") | not) and .metadata.name != "default")] and persist it to the local /api/v1/namespaces#34d4beecc95c65d815d9d48fd4fdcb0c521631852ad088ef74e36d012b0e1e0d file.

Rationale

Resource quotas provide constraints that limit aggregate resource consumption per project. This helps prevent resource starvation. When deploying your application, it is important to tune based on memory and CPU consumption, allocating enough resources for the application to function properly.

ID
xccdf_org.ssgproject.content_rule_resource_requests_quota_per_project
Severity
Medium
References
Updated