tree 652ea3178d1dfc9a2d0f3c286bb1bcb5dd309b45
parent 078b7596268c177eeb0fca0bdb22e2b67332e8ad
author Carlos Amedee <carlos@golang.org> 1595367848 -0400
committer Carlos Amedee <carlos@golang.org> 1597763963 +0000

internal/coordinator/pool: add ec2 pool

The EC2 buildlet pool added by this commit will manage the lifecycle
of buildlets running on EC2. EC2 VMs will only be created for the
ARM64 architecture. As VMs are requested, the pool will ensure that
there are enough resources for the VM to be created and keep track of
the VMs created. Once a VM is destroyed, the resources will be made
available for other VMs. This pool will only keep instances as they
are needed.

Updates golang/go#36841
Updates golang/go#38337

Change-Id: Ic777485c0b0a69ec13726c58b49e9fdc1df4777e
Reviewed-on: https://go-review.googlesource.com/c/build/+/247907
Run-TryBot: Carlos Amedee <carlos@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alexander Rakoczy <alex@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>