Machines:

r2-a25:

     $ ssh -i ~/keys/id_ed25519_golang1 linaro@64.28.99.28
     (key: http://go/golang-ssh-key)

Machine details:

  linaro@r2-a25:~# cat /proc/cpuinfo | grep process | wc -l
  8
 
  linaro@r2-a25:~# free
                total        used        free      shared  buff/cache   available
  Mem:       32942028      850048    30117168      619288     1974812    31097620
  Swap:      32165884           0    32165884


  linaro@r2-a25:~# lsb_release  -a
  No LSB modules are available.
  Distributor ID:    Ubuntu
  Description:       Ubuntu 16.04.2 LTS
  Release:           16.04
  Codename:          xenial


But each machine is setup like:

   $ apt-get install docker.io
   
   $ build.sh (with Dockerfile in same directory)

   $ echo "<BUILDER KEY>" > /etc/gobuild.key # or custom path, see rundockerbuildlet.go
   
   $ GOARCH=arm64 GOOS=linux go install golang.org/x/build/cmd/rundockerbuildlet && \
     scp -i ~/keys/id_ed25519_golang1 ~/bin/linux_arm64/rundockerbuildlet linaro@64.28.99.28:/usr/local/bin

   $ scp -i ~/keys/id_ed25519_golang1 rundockerbuildlet.service linaro@64.28.99.28:/etc/systemd/user/

   $ systemctl enable /etc/systemd/user/rundockerbuildlet.service
   $ systemctl start rundockerbuildlet.service