id: gcloud-gke-monitoring-disabled

info:
  name: GKE Clusters Without Cloud Monitoring Enabled
  author: princechaddha
  severity: medium
  description: |
    Ensure that Cloud Monitoring is enabled for your Google Kubernetes Engine (GKE) clusters to collect metrics emitted by your Kubernetes applications and the GKE infrastructure. Cloud Monitoring helps track cluster health, application reliability, and performance metrics.
  impact: |
    Without monitoring enabled, it becomes difficult to identify and address performance bottlenecks, security threats, and potential failures in your GKE clusters. Basic information such as CPU usage, memory usage, and disk usage would not be available for observability metrics.
  remediation: |
    Enable Cloud Monitoring for your GKE clusters using:
    gcloud container clusters update CLUSTER_NAME --region=REGION --monitoring=SYSTEM,API_SERVER,SCHEDULER,CONTROLLER_MANAGER,DAEMONSET,DEPLOYMENT,HPA,POD,STATEFULSET,STORAGE,CADVISOR,KUBELET,DCGM
  reference:
    - https://cloud.google.com/kubernetes-engine/docs/how-to/monitoring
    - https://www.trendmicro.com/cloudoneconformity/knowledge-base/gcp/GKE/enable-and-configure-cloud-monitoring.html
  tags: cloud,devops,gcp,gcloud,gke,kubernetes,monitoring,observability,gcp-cloud-config

flow: |
  code(1)
  for(let projectId of iterate(template.projectIds)){
    set("projectId", projectId)
    code(2)
    for(let cluster of iterate(template.clusters)){
      cluster = JSON.parse(cluster)
      set("clusterName", cluster.name)
      set("location", cluster.location)
      code(3)
    }
  }

self-contained: true

code:
  - engine:
      - sh
      - bash
    source: |
      gcloud projects list --format="json(projectId)"

    extractors:
      - type: json
        name: projectIds
        internal: true
        json:
          - '.[].projectId'

  - engine:
      - sh
      - bash
    source: |
      gcloud container clusters list --project $projectId --format="json(name,location)"

    extractors:
      - type: json
        name: clusters
        internal: true
        json:
          - '.[]'

  - engine:
      - sh
      - bash
    source: |
      gcloud container clusters describe $clusterName --location $location --project $projectId --format="json(monitoringService)"

    matchers:
      - type: word
        words:
          - '"monitoringService": "none"'

    extractors:
      - type: dsl
        dsl:
          - '"GKE cluster " + clusterName + " in " + location + " of project " + projectId + " does not have Cloud Monitoring enabled"'
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