x/build/cmd/builder: delete

[bradfitz]

We have very few users of the old-style builder left:

https://github.com/golang/go/wiki/DashboardBuilders#old-style-builders

Of the ones I see running, to migrate we have:

• plan9-386-ducolombier (@0intro)
• plan9-amd64-9front (@0intro)
• plan9-arm (@0intro)
• nacl-arm-cheney (@davecheney) no longer running
• dragonfly-amd64 (@fupjack)
• freebsd-arm-paulzhol (@paulzhol)

If we can migrate those few users to cmd/buildlet instead we can then delete x/build/cmd/builder.

[bradfitz]

/cc @adams-sarah @jessfraz @cybrcodr @andybons

[0intro]

There is also:

plan9-arm (@0intro)

plan9-386-ducolombier is a temporary builder. It will go away once GCE is fixed.

[bradfitz]

David, can you start migrating at least plan9-arm and plan9-amd64-9front to the new system? I can get you new host keys and send you a CL for the dashboard/builders.go CL if so.

[cybrcodr]

How does one migrate from old-style builder to using the buildlet? Are these the instructions ...

https://github.com/golang/go/wiki/DashboardBuilders#how-to-set-up-a-builder

Is the key (.gobuildkey) used for initial buildlet run only or is it permanent for all future runs?

Step 6. Have golang-dev deploy it. -- does "it" here pertain to dashboard or do we also need to redeploy coordinator and others?

[bradfitz]

Yes, those are the instructions.

The build key is required whenever the buildlet wants to register itself with the coordinator, which happens once per run, or whenever one of them restarts.

[bradfitz]

Step 6. Have golang-dev deploy it. -- does "it" here pertain to dashboard or do we also need to redeploy coordinator and others?

Only the coordinator. The dashboard doesn't need updates currently. If #19930 gets fixed, though, then restarting the dashboard would be nice but not required.

[paulzhol]

@bradfitz how do I

get a builder host type & hash

Is the builder=freebsd-arm query param to the https://build-dot-golang-org.appspot.com/key endpoint supposed to work for with my gmail account?
What should I do with my current hash in .gobuildkey file?

[bradfitz]

@paulzhol, email me (bradfitz golang) and I'll get you keys.

[bradfitz]

Actually, I might have a new plan. I think I can just modify the buildlet a bit to work with your existing files & keys unmodified. That'd be easier for everybody.

[paulzhol]

Great! I'll take the opportunity to upgrade to FreeBSD-11.1 while waiting for the new buildlet.

[gopherbot]

Change https://golang.org/cl/51830 mentions this issue: cmd/builder: delete unused gccgo, old^2 perf dashboard, and mercurial support

[gopherbot]

Change https://golang.org/cl/52632 mentions this issue: cmd/builder: update docs, delete more dead code