terraform.gcp.best-practice.gcp-gke-alias-ip-enabled.gcp-gke-alias-ip-enabled

profile photo of semgrepsemgrep
Author
unknown
Download Count*
LGPL Commons Clause
License

Ensure Kubernetes Cluster is created with Alias IP ranges enabled

Run Locally

Run in CI

Semgrep CI docs

Defintion

Edit RuleView Source
Open in Playground 
rules:
  - id: gcp-gke-alias-ip-enabled
    patterns:
      - pattern: resource
      - pattern-inside: |
          resource "google_container_cluster" "..." {
          ...
          }
      - pattern-not-inside: |
          resource "google_container_cluster" "..." {
          ...
          ip_allocation_policy {
            ...
            use_ip_aliases = "false"
            ...
          }
          ...
          }
    message: Ensure Kubernetes Cluster is created with Alias IP ranges enabled
    metadata:
      category: best-practice
      technology:
        - terraform
        - gcp
      license: Commons Clause License Condition v1.0[LGPL-2.1-only]
    languages:
      - hcl
    severity: WARNING

Examples

gcp-gke-alias-ip-enabled.tf

# fail
# ruleid: gcp-gke-alias-ip-enabled
resource "google_container_cluster" "fail" {
  name                     = "fail-cluster"
}

# ok: gcp-gke-alias-ip-enabled
resource "google_container_cluster" "success" {
  name                     = "success-cluster"
  ip_allocation_policy {
    cluster_ipv4_cidr_block  = "10.32.0.0/14"
    services_ipv4_cidr_block = "10.0.0.0/20"
    use_ip_aliases           = "false"
  }
}