Coordinator-managed builders

Builders that are managed by the coordinator (VMs running on GCE or reverse buildlets, such as the new OS X builders) are listed here:

http://farmer.golang.org/builders

For design details about the coordinator, see http://golang.org/s/builderplan

Old-style builders

Older-style builders are listed below. These builders are configured and run manually. The goal is to migrate as many as possible over to the new system.

title	description	owner	notes
dragonfly-amd64	?	@fupjack - Justin Sherrill	?
freebsd-arm-paulzhol	Cubiboard2 1Gb RAM dual-core Cortex-A7 (Allwiner A20)	@paulzhol - Yuval Pavel Zholkover	FreeBSD 11 r299674 with NODEBUG kernel (w/o INVARIANTS, WITNESS, DEADLKRES)
nacl-arm-cheney	Raspberry Pi 3	@davecheney
openbsd-arm	SolidRun CuBox-i4Pro, ARM Cortex A9 R2 792 MHz, 2GB RAM	@4a6f656c - Joel Sing
plan9-386-ducolombier	Intel Core 2 Quad Q8200 2.33 GHz, 6GB	@0intro - David du Colombier	Plan 9 from Bell Labs
plan9-arm	Raspberry Pi 3 Model B	@0intro - David du Colombier	Plan 9 from Bell Labs
plan9-amd64-9front	VM	@0intro - David du Colombier	9front

Builder Requirements

internet connection (at least be able to access Google and http://build.golang.org)
preferably with two or more (V)CPUs, as at least one test (sync/atomic requires runtime.NumCPU() > 1 to test more completely)
at least 512MiB of memory (1GB or more highly recommended. 512MB might need a small GOGC setting to avoid thrashing.)

Restrictions

The combination of Ubuntu 11.10 or 12.04 OMAP4 kernel and pandaboard (ES) have proven unstable as builders. See issue 4305. Make sure you have updated to the latest available 12.04.2 release.

How to set up a builder

talk to golang-dev@ to get a builder host type & hash (they can get one from e.g. https://build-dot-golang-org.appspot.com/key?builder=host-foo-bar), and put that in ~/.gobuildkey or ~/.gobuildkey-host-foo-bar or the file pointed to be env var $GO_BUILD_KEY_PATH.
go get golang.org/x/build/cmd/buildlet
Run the buildlet in a loop or under systemd: while true; do buildlet -coordinator=farmer.golang.org -reverse-type=host-foo-bar -reboot=false; done
Verify you can see the host registered at https://farmer.golang.org/#pools in the “Reverse pool machine detail” section and “Reverse pool summary”.
Add a builder type to https://github.com/golang/build/blob/master/dashboard/builders.go (see the addBuilder lines). Run tests. Send the CL.
Have golang-dev deploy it.