How to scale up a group programatically ?

[Nastaliss]

Hi, I would like to wake up applications at a certain time of day because it takes some time to load and I'd like to make sure it's ready in the morning. Another use would be to run playwright tests on an instance that's automatically scaled down, and make sure it's up before the tests start.
I tried using curl to use the service's usual hostname, but as it's using a dynamic strategy I'm not sure how to differentiate the loading page to the actual service's page (I looked at the response headers, and status code but there is no header for loading page and a 200 status code)
I tried using the sablier API but did not find any documentation. Is that something that can be used in my use cases ?
Thanks :)

[acouvreur]

Hello @Nastaliss

Hi, I would like to wake up applications at a certain time of day because it takes some time to load and I'd like to make sure it's ready in the morning. Another use would be to run playwright tests on an instance that's automatically scaled down, and make sure it's up before the tests start.

There is an open issue about that: #292 but it's not actively worked on.

I tried using curl to use the service's usual hostname, but as it's using a dynamic strategy I'm not sure how to differentiate the loading page to the actual service's page (I looked at the response headers, and status code but there is no header for loading page and a 200 status code)

Makes sense, because the Sablier headers will not be forwarded as soon as the service is ready.

I tried using the sablier API but did not find any documentation. Is that something that can be used in my use cases ?

You can use the API, it is still quite undocumented you are right, and there's an issue about creating a OpenAPI document: #157

However, in the meantime, you can make the following calls:

curl http://localhost:10000/api/strategies/blocking?group=mygroup&session_duration=1h&timeout=10m

This will wake the group mygroup for 1h and it will wait 10 minutes for the group to wake up.

You can then check the response headers and/or body.

If that answers your question, please mark this answered. Thanks!

[Nastaliss]

Thanks a lot ! I was going to try stuff on the api today to do just what you shared.
I'll get back to you shortly.