[New Feature]: Reduce OPERA PCM deployment time by breaking out and reducing dependencies in terraform files

[philipjyoon]

Checked for duplicates

Yes - I've already checked

Alternatives considered

Yes - and alternatives don't suffice

Related problems

No response

Describe the feature request

I think there's a way to cut down deployment time by like 20-30 mins. Mozart instance creation depends metrics creation but it doesn't really need it until half way through when it's running sds commands. I don't know why it depends only on metrics and not factotum or grq because it runs the same sds commands for those boxes too. In the same vein, install_pcm_and_pge null_resource depends on mozart but all it needs is for the EC2 to be up. But mozart instantiation has a bunch of remote-execs that are part of the EC2 creation so install_pcm_and_pge doesn't kick in until ALL mozart services and files are installed which is not necessary. So I think these are the false, unnecessary dependencies we have in our terraform.

So if we break out all the remote-execs of Mozart and Metrics into one null_resource instead then the other subsequent (mozart creation and install_pcm_and_pge) can run much earlier and run in parallel - which is how terraform is supposed to work.