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HOSTS.md

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Hosts

build01

This machine is perfect for running heavy builds.

  • Provider: Hetzner
  • CPU: AMD Ryzen 7 1700X Eight-Core Processor
  • RAM: 64GB
  • Drives: 2 x 512 GB SATA SSD

build02

This machine currently just runs r-ryantm/nixpkgs-update.

  • Provider: Hetzner
  • CPU: AMD Ryzen 7 3700X Eight-Core Processor
  • RAM: 64GB DDR4 ECC
  • Drives: 2 x 1 TB NVME in RAID 1

build03

This machine is a replacement for build01.

  • Provider: Hetzner
  • CPU: AMD Ryzen 5 3600 6-Core Processor
  • RAM: 64GB DDR4 ECC
  • Drives: 2 x 512 GB NVME in RAID 1

build04

This machine is meant as an aarch64 builder for our hydra instance running on build03.

  • Provider: Oracle cloud
  • Instance type: Ampere A1 Compute
  • CPU: 4 VCPUs on an Ampere Altra (arm64)
  • RAM: 24GB
  • Drives: 200 GB Block

SSH config:

You will need to set your admin username if it doesn't match your local username.

Host *.nix-community.org
  User <youradminusername>

Deployment commands:

$ ./inv deploy

If you want to reboot a machine, use the following command:

$ inv deploy --hosts build02 reboot --hosts build02

Install/Fix system from Hetzner recovery mode

  1. Copy your ssh key to the recovery system so that the kexec image can re-use it.
yourmachine> ssh-copy-id root@build0X.nix-community.org
  1. Download and boot into kexec-image:
$ curl -L https://github.com/nix-community/nixos-images/releases/download/nixos-unstable/nixos-kexec-installer-x86_64-linux.tar.gz | tar -xzf- -C /root
$ /root/kexec/run

Debug VM

You can start a vm from the rescue system in order to debug the boot:

$ nix-shell -p qemu_kvm --run 'qemu-kvm -m 10G -hda /dev/sda -hdb /dev/sdb -curses -cpu host -enable-kvm'