kbara / snabblab-nixos

NixOS configuration for the Snabb Lab

SnabbLab NixOS

This repository contains the configuration for the NixOS based server(s) in the Snabb Lab.

Making changes

All changes are done from Eiger (supporting server):

$ ssh <yourusername>@eiger.snabb.co
$ sudo su - deploy
$ cd snabblab-nixos

Deploying Eiger (supporting server)

$ nixops deploy -d eiger

Deploying the Lab

Change machines/lab.nix and deploy to a single machine lugano-2:

$ nixops deploy -d lab-production --include lugano-2

Change modules/lab-configuration.nix to deploy to all lab server change:

$ nixops deploy -d lab-production

Setup (only for bootstrapping a new deployment)

NixOps is used for deployment and provisioning of the machines. It uses an sqlite database (~/.nixops/deployments.nixops) to store state about the provisioning. For example SSH keys, path to nix files, current partitions, etc.

To bootstrap a bare metal machine, it has to be running with a basic NixOS install. Then for the lab as an example do:

$ nixops create -d lab-production ./machines/lab.nix ./machines/lab-production.nix

To bootstrap Hetzner machine we need partitions, IP, Hetzner Robot credentials as seen in:

$ HETZNER_ROBOT_USER=<user> HETZNER_ROBOT_PASS=<pass> create -d eiger ./eiger.nix ./eiger-hetzner.nix