How to stop all machines in a v2 app?

Questions / Help
1

Hello, we have 2 clusters for our app, prod1 and prod2. At each release, we make the frontend point to the other cluster, and shut down the previous cluster.

How can I stop all machines in the previous cluster, preventing them from being automatically started by incoming requests, but still keeping the machines ready for the next release?

2

Oh, interesting!

First, have you tried a bluegreen deployment strategy instead? (flyctl deploy · Fly Docs)

If that’s not appropriate, one thing I would try is using the API to update each machine in a cluster to remove the service definition (and then bring the service definition back when needed on the next deploy): Working with the Machines API · Fly Docs

That all seems a bit complex tho - may I ask what the use case is for using 2 clusters?

1 Like
3

Yes we tried the bluegreen strategy but it doesn’t offer enough control.

We do this to precisely control our blue green deployments:

  • [frontend was pointing to prod1]
  • deploy backend on prod2
  • deploy frontend on staging, pointing to prod2
  • check everything works with the new frontend & backend
  • switch frontend from staging to production
  • shutdown prod1
4

It’s not clear to me what “remove the service definition” means, could you provide an example please?

5

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