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Id: be41f891-96b1-4b9d-b74f-b922a918c778
Cloud Provider: GCP
Platform: Ansible
Severity: Low
Category: Insecure Configurations
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Description
GKE node pools should use Container-Optimized OS (COS) images. COS is a Google-managed, hardened OS with automatic security updates and tighter integration with GKE, reducing exposure to unpatched vulnerabilities and kernel-level attack surface.
In Ansible, check tasks using the google.cloud.gcp_container_node_pool or gcp_container_node_pool modules and ensure the config.image_type property is defined and starts with COS (case-insensitive). Tasks missing config.image_type or with values that do not start with COS are flagged.
Secure configuration example:
- name: Create GKE node pool with COS image
google.cloud.gcp_container_node_pool:
name: my-node-pool
initial_node_count: 3
config:
machine_type: e2-medium
image_type: COS_CONTAINERD
Compliant Code Examples
- name: create a node pool
google.cloud.gcp_container_node_pool:
name: my-pool
initial_node_count: 4
cluster: '{{ cluster }}'
location: us-central1-a
project: test_project
auth_kind: serviceaccount
service_account_file: /tmp/auth.pem
state: present
config:
image_type: COS
- name: create a node pool
google.cloud.gcp_container_node_pool:
name: my-pool
initial_node_count: 4
cluster: "{{ cluster }}"
location: us-central1-a
project: test_project
auth_kind: serviceaccount
service_account_file: /tmp/auth.pem
state: present
config:
image_type: COS_CONTAINERD
Non-Compliant Code Examples
---
- name: create a node pool
google.cloud.gcp_container_node_pool:
name: my-pool
initial_node_count: 4
cluster: "{{ cluster }}"
location: us-central1-a
project: test_project
auth_kind: serviceaccount
service_account_file: "/tmp/auth.pem"
state: present
config:
image_type: WINDOWS_LTSC
