If you have a GKE cluster setup to run CI jobs, such as using Gitlab CI Runner, or any other ephemeral workload and you want to auto-delete the node pool when people go home for the day this should help.
This small Go application can be easily deployed to Google App Engine and be setup to automatically create or delete a node pool for GKE on a schedule.
Clone the repo then edit app.yaml with the environment variables for your setup.
MACHINE_TYPE: optional, defaults to n1-standard-1, the google cloud machine type to create
PROJECT: required, your Google project id
LOCATION: required, the region you want the node pool to be created in
CLUSTER: required, the name of the cluster that node pool should be long to
NODE_POOL: optional, defaults to pool-1, the name of the node pool
SERVICE_ACCOUNT: required, the name of the service account that the node pool servers should use
OAUTH_SCOPES: required, comma seperated list of oauth_scopes to be attached to the node pool servers
RANDOM_PATH: optional, defaults to 8YkpGd2LQN3nBuWJfXRb, adds a random URL path to the endpoints that control behaviour
PREEMPTIBLE: optional, default to true, should the servers in the node pool be preemptible
DISK_SIZE: optional, default to 50, size in GB of the disks for the servers in the node pool
INITIAL_NODE_COUNT: optional, default to 1, how many servers should be in the pool on create
MAX_NODE_COUNT: optional, default to 2, how many servers should the pool autoscale up to
Then edit cron.yaml to fit your schedule.
Deploy to Google App Engine using the GCloud tool.
gcloud app deploy --project "yourprojectid"
Test it out by going to https://your-appengine-url/$RANDOM_PATH/up to bring up the node pool and /down to bring it down again.
If all is well deploy the cron job to bring it up and down on a schedule.
gcloud app deploy --project "yourprojectid" cron.yaml
Your done!
Pull requests gladly accepted!