Ensure KSM is disabled

BajaNivel 2Automatizadaopenshift-virt

Descripción

Kernel Samepage Merging (KSM) is a Linux kernel feature that merges identical memory pages across virtual machines running on a single host, potentially reducing memory usage and improving system performance. Audit: Passes when .spec.ksmConfiguration of the HyperConverged resource is unset or false (KSM is disabled by default); any KSM node selector configuration fails. Requires oc logged in to the cluster with read access.

Cómo se verifica

Método de auditoría: Comando de shell

shell

command -v oc >/dev/null 2>&1 || exit 1; v=$(oc get hyperconvergeds kubevirt-hyperconverged -n openshift-cnv -o jsonpath='{.spec.ksmConfiguration}') || exit 1; case "$v" in ""|false|null|"{}") echo compliant;; *) echo noncompliant;; esac

Salida esperada: compliant

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

Disable the KSM feature.For example, by directly editing the object with oc edit hyperconverged kubevirt-hyperconverged -n openshift-cnv and set the field to false

Propiedades

Sistemas operativos: Cualquiera
Etiquetas: openshift-virtmemoryksm
Referencia: CIS Red Hat OpenShift Virtual Machine Extension Benchmark v1.0.0 - 1.7 Ensure KSM is disabled

Verificar este host

Ejecute esto en un equipo que tenga permiso para auditar. El escaneo es de solo lectura.

shell

tmaegis scan --target openshift-virt --level 2