Use DNS based access or private GKE control plane endpoints

보통레벨 2자동gke

설명

Use DNS based access or private GKE control plane endpoints to reduce Kubernetes API server exposure. Prefer DNS based control plane access where possible, and if IP based access is required, disable the external IP based endpoint or restrict it to trusted networks only. Requires gcloud with container.clusters.get; the cluster comes from GKE_CLUSTER and GKE_LOCATION (optional GKE_PROJECT, else the gcloud default project).

점검 방법

감사 방식: 셸 명령

shell

out=$(gcloud container clusters describe "${GKE_CLUSTER:?set GKE_CLUSTER}" --location "${GKE_LOCATION:?set GKE_LOCATION}" ${GKE_PROJECT:+--project=$GKE_PROJECT} --format='value(controlPlaneEndpointsConfig.ipEndpointsConfig.enabled,controlPlaneEndpointsConfig.ipEndpointsConfig.enablePublicEndpoint,controlPlaneEndpointsConfig.dnsEndpointConfig.endpoint,controlPlaneEndpointsConfig.dnsEndpointConfig.allowExternalTraffic)') || exit 1
set -- $(printf '%s' "$out" | tr '\t' '|' | awk -F '|' '{for(i=1;i<=4;i++) printf "%s ", ($i=="" ? "-" : $i)}')
if [ "$2" = False ]; then echo compliant
elif [ "$1" = False ] && [ "$3" != - ] && [ "$4" = True ]; then echo compliant
else echo "noncompliant: ipEndpoints=$1 publicEndpoint=$2 dnsEndpoint=$3 allowExternalTraffic=$4"; fi

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

Remediate existing GKE clusters by updating the control plane access configuration. Recreating the cluster is not required for this control. Choose the access model that matches the organization’s approved management path. Method 1: Use DNS based control plane access and disable IP based endpoint access where appropriate: gcloud container clusters update $CLUSTER_NAME \ --location $LOCATION \ --project $PROJECT_ID \ --enable-dns-access \ --no-enable-ip-access Method 2: Use IP based access with the external endpoint disabled and the private endpoint enabled: gcloud container clusters update $CLUSTER_NAME \ --location $LOCATION \ --project $PROJECT_ID \ --enable-ip-access \ --enable-private-endpoint If the public IP based endpoint must remain enabled, restrict it with authorized networks and use only approved CIDR ranges.

속성

운영 체제: 모두
태그: gkemanaged-servicesnetwork
참고 자료: CIS Google Kubernetes Engine (GKE) Benchmark v2.0.0 - 5.6.4 Use DNS based access or private GKE control plane endpoints

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감사 권한이 있는 시스템에서 실행하세요. 스캔은 읽기 전용입니다.

shell

tmaegis scan --target gke --level 2