Load Test Google Cloud APIs

JMeter and Go

This provides fantastic transparency and control, but doesn’t obviate the need for load testing:

Those of you familiar with JMeter may find configuring it for Google Cloud a no-brainer; however, if you’re new to either JMeter or Google Cloud, the following may save you some trial and error.

This step is required if you have non-default quota associated with your project; otherwise you can skip it.

You’ll need a Google Cloud credential to authorize JMeter against your project; make sure you create it on the project against which you want to test so the appropriate quotas are applied. Create a new credential rather than re-using an existing one in case it’s compromised.

Record the client ID and secret securely.

Make sure you’re in a browser session associated with your test project’s domain, and with an identity which has sufficient permissions to authorize the API scope (eg. Super Admin role for Admin SDK APIs).

If you have non-default quota associated with your project, click on the settings (gear icon) and…

Otherwise you can use the default credentials generated by the Playground.

In the main screen follow the prompts to:

This may take you directly to Step 3 and collapse Step 2; expand Step 2 if necessary to see the access token.

You’ll come back to this screen to get the access token in a subsequent step, so don’t close this window.

From your installation’s bin directory, run JMeter’s UI.

You’ll be prompted in any case…

Select the Summary Report to monitor progress and click on the green Play button at the top of the screen.

When the run is complete, check the listeners:

When you’re satisfied with your test plan you can run it directly from the command line.

Load testing and multi-threading go together like toast and jam; however, Go isn’t as performant as JMeter, so you’ll need to run more threads, aka Go routines, to generate the same load as JMeter; in return you get loads of control and flexibility.

There are a couple of ways of implementing multi-threading:

The list command operates similarly to the JMeter test above; the insert command increments group names as it inserts them.

You need to use go build to compile the code, and then run the binary; command-line flags and arguments don’t work with the go run shortcut.

You’ll need to authorize the tool against the Admin SDK (this requires using a session associated with a user with the Super Admin role; Google Cloud Platform APIs just require the usual IAM permissions).

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