How to create Google Kubernetes (GKE) cluster in Ansible with custom image? - kubernetes

Question

I've used this pattern in the past to create a GKE and it's worked great, but now I need to define a custom image type to use.
Here's the ansible playbook i'm working with.
- name: GCE
hosts: localhost
gather_facts: no
vars_files:
- vars/default.yml
tasks:
- name: create cluster
gcp_container_cluster:
name: "{{ cluster_name }}"
initial_node_count: "{{ node_count}}"
initial_cluster_version: "{{ cluster_kubernetes_version }}"
master_auth:
username: admin
password: "{{ cloud_admin }}"
node_config:
machine_type: e2-medium
disk_size_gb: "{{ disk_size_gb }}"
location: "{{ cluster_zone}}"
project: "{{ project }}"
auth_kind: "{{ auth_kind }}"
service_account_file: "{{ service_account_file }}"
state: present
scopes: "{{ scopes }}"
register: cluster
- name: create a node pool
google.cloud.gcp_container_node_pool:
name: default-pool
autoscaling:
enabled: yes
min_node_count: "{{ node_count}}"
max_node_count: "{{ max_node_count }}"
initial_node_count: "{{ node_count }}"
cluster: "{{ cluster }}"
location: "{{ cluster_zone}}"
config:
machine_type: e2-medium
disk_size_gb: "{{ disk_size_gb }}"
project: "{{ gce_project}}"
auth_kind: serviceaccount
service_account_file: "{{ service_account_file }}"
state: presen
I'm trying to use an E2 based image with 16 cores and 70GB of RAM. The spec don't matter as much as the fact that I can't specify a 'machine type' that's already preconfigured.
Is it possible to still use ansible to create the cluster? Do I need to create a custom image type to reference?
Just to clarify, there are no errors being thrown out. defining the machine_type as e2-medium doesn't allow me to allocate the resources I need and define an instance with the resources required. I'm asking how to say use e2-medium as a base and increase the ram allocation to 70GB or if that is feasible?

Answer 1

IIUC, you should be able to reference your machine type as e2-custom-16-71680
i.e.:
- name: your-cluster
google.cloud.gcp_container_cluster:
...
node_config:
machine_type: e2-custom-16-71680
disk_size_gb: "{{ disk_size_gb }}"
...
The (hidden) documentation for specifying custom machine types:
https://cloud.google.com/compute/docs/instances/creating-instance-with-custom-machine-type#gcloud