Ensure that CPU priority is set appropriately on containers

MoyenneNiveau 1Revue manuelledocker

Description

By default, all containers on a Docker host share resources equally. By using the resource management capabilities of the Docker host you can control the host CPU resources that a container may consume. By default, CPU time is divided between containers equally. If you wish to control available CPU resources amongst container instances, you can use the CPU sharing feature. Reported as a manual review item: the audit needs a site-specific judgement.

Méthode de vérification

Méthode d'audit: Revue manuelle

Cette recommandation ne peut pas être vérifiée automatiquement. Une analyse la liste avec ces instructions lorsque vous passez --include-manual.

You should run the following command: docker ps --quiet --all | xargs docker inspect --format '{{ .Id }}: CpuShares={{ .HostConfig.CpuShares }}' If the above command returns 0 or 1024, it means that CPU shares are not in place. If it returns a non-zero value other than 1024, it means that they are in place.

Méthode de correction

Méthode de correction: Recommandation ou correctif d'infrastructure

You should manage the CPU runtime between your containers dependent on their priority within your organization. To do so start the container using the --cpu-shares argument. For example, you could run a container as below: docker run -d --cpu-shares 512 centos sleep 1000 In the example above, the container is started with CPU shares of 50% of what other containers use. So if the other container has CPU shares of 80%, this container will have CPU shares of 40%. Every new container will have 1024 shares of CPU by default.

Propriétés

Systèmes d'exploitation: Tous
Étiquettes: dockermanual
Référence: CIS Docker Benchmark v1.9.0 - 5.12 Ensure that CPU priority is set appropriately on containers