CODEWITHSUNDEEP
google-cloud-platformapp-engine-flexible
menafrancisco
menafrancisco

Reputation: 1

How to schedule AppEngine Flex instance to stop and start in Google Cloud?

I need to reduce cost in Google Cloud AppEngine Flex account. I need to automatically start instances in operating hours, then stop them at night. All of this every day. I have found information about Compute Engine, but nothing about AppEngine.

Upvotes: 0

Views: 1023

Answers (2)

guillaume blaquiere
guillaume blaquiere

Reputation: 76093

You can't scale to 0 your App Engine flex. You need to consider other product (App Engine standard or Cloud Run) that scale to 0 automatically or to redesign your architecture.

You can imagine to deploy on Compute Engine and thus to use Cloud Scheduler to scedule the stop and the start.

If you really want to use App Engine Flex, it's more difficult, because, when you are on the default service, you can't delete all versions, at least need to be served. The idea here is to deploy 2 services on App Engine:

  1. Your App Engine flex app
  2. A App Engine standard (dummy with nothing or a maintenance page for example)

The idea is to promote 100% of the traffic the evening to the Standard version to offload the App Engine flex and to pay nothing during the night. In the morning, to promote 100% of the traffic to the Flex version.

Upvotes: 1

Pamela Chup
Pamela Chup

Reputation: 161

App Engine provides the capacity to scale down and up based on application metrics.

Automatic scaling

Automatic scaling creates instances based on request rate, response latencies, and other application metrics. You can specify thresholds for each of these metrics, as well as a minimum number instances to keep running at all times.

To archive this, you need to configure your App.yaml and adding the automatic_scaling option.

automatic_scaling:
  min_num_instances: 1
  max_num_instances: 15
  cool_down_period_sec: 180
  cpu_utilization:
      target_utilization: 0.6
  target_concurrent_requests: 100

You can adjust the parameters in min_num_instances and max_num_instances to a value of 1 (or greater) in order to match your budget and your billing needs

Upvotes: 0

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