I now experienced it again live!
And in the logs I can see
--regions filter applied, deploying to 0/1 machines
Process groups have changed. This will:
* create 1 "app" machine
> Launching new machine
No machines in group app, launching a new machine
I see that when the workflow was running again, it incremented the machine count by 1. I have been on parental leave for 6 months so I assume something has changed during this period. Previously redeploys of the same app did not just add another machine (we would have noticed!).
I cannot understand why I just can not add a -N 1 flag when deploying. Oh well, i thought that -ha false was supposed to be that command but alas.
Oh, I now found that others have had similar issues, so at least I am not alone. Bug? Deploy of multi-process app reactivates process groups that had been set to 0 - #4 by allison
I’ll try setting --update-only as suggested here but I really would like better ergonomics here