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nixcfg/doc/adding-nodes.md

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Quick start

How to create files for a new zone

The documentation is written for the production cluster, the same apply for other clusters.

Basically:

  • Create your site file in cluster/prod/site/ folder
  • Create your node files in cluster/prod/node/ folder
  • Add your wireguard configuration to cluster/prod/cluster.nix
    • You will have to edit your NAT config manually to bind one public IPv4 port to each node
    • Nodes' public wireguard keys are generated during the first run of deploy_nixos, see below
  • Add your nodes to cluster/prod/ssh_config, it will be used by the various SSH scripts.
    • If you use ssh directly, use ssh -F ./cluster/prod/ssh_config
    • Add User root for the first time as your user will not be declared yet on the system

How to deploy a Nix configuration on a fresh node

We suppose that the node name is datura. Start by doing the deployment one node at a time, you will have plenty of time in your operator's life to break everything through automation.

Run:

  • ./deploy_nixos prod datura - to deploy the nix configuration file;
  • a new wireguard key is printed if it hadn't been generated before, it has to be added to cluster.nix, and then redeployed on all nodes as the new wireguard conf is needed everywhere
  • ./deploy_passwords prod datura - to deploy user's passwords
  • if a user changes their password (using ./passwd), needs to be redeployed on all nodes to setup the password on all nodes
  • ./deploy_pki prod datura - to deploy Nomad's and Consul's PKI