README.md

smagnet

Change the number of Spanner Nodes

Setup

Create PubSub Topic for Cloud Scheduler

gcloud pubsub topics create $YOUR_TOPIC

Function's Deploy

gcloud functions deploy HandleSpannerMagnet --runtime go111 --trigger-topic $YOUR_TOPIC

Create Cloud Scheduler Job

Create a schedule for which you want to change the number of Spanner's Nodes. If you increase at the beginning of the peak time and decrease after the end, you need two Jobs.

Job Message

{
  "projectId" : "hoge",
  "instanceId" : "fuga",
  "nodeNumber" : 7
}

gcloud beta scheduler jobs create pubsub $JOB --schedule=$SCHEDULE --topic=smagnet --message-body-from-file=example-pubsub-message.json