GCP Kubernetes Engine Clusters have Alias IP disabled

Description

In GKE, clusters can be set apart based on how they route traffic from one pod to another. A cluster that uses alias IP ranges is called a VPC-native cluster. A cluster that uses Google Cloud Routes is called a routes-based cluster. We recommend you create Kubernetes clusters with alias IP ranges enabled. Alias IP ranges allow Pods to directly access hosted services without using a NAT gateway.

Code Example

resource "google_container_cluster" "primary" {
  name     = "my-gke-cluster"
  location = "us-central1"
  remove_default_node_pool = true
  initial_node_count       = 1
  ip_allocation_policy
  {
  }
}

Remediation

Terraform

Rule Details

Field	Value
ID	IAC-0882
Severity	LOW
IaC Type	Terraform
Frameworks	Terraform, TerraformPlan
Checkov ID	CKV_GCP_23

References

• Checkov Rule

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