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nixos/modules/beszel/enable-agent.nix
beatzaplentyandClaude Sonnet 4.6 f22ff7db79
Check NixOS configurations / eval-hosts (pull_request) Successful in 10m59s
refactor(beszel): move KEY and TOKEN fully into enable-agent.nix
KEY (hub's SSH public key) is now stored in variables.nix as beszelHubKey
and set by enable-agent.nix — no host file ever needs to touch it.
TOKEN was already universal; this removes the last per-host beszel config.

Importing enable-agent.nix in a build type is now the only step needed to
add a new host to beszel monitoring.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-07-29 12:37:54 +10:00

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{ config, vars, ... }:
{
# Universal token shared by all beszel agents. Add to secrets/common.yaml:
# sops secrets/common.yaml
# beszel-token: <value from the beszel hub UI>
sops.secrets."beszel-token" = { };
sops.templates."beszel.env".content = ''
TOKEN=${config.sops.placeholder."beszel-token"}
'';
services.beszel.agent = {
enable = true;
environmentFile = config.sops.templates."beszel.env".path;
environment = {
#DOCKER_HOST = "tcp://docker-socket-proxy:2375";
HUB_URL = "http://${vars.dockerHost}.${vars.homeDomain}:${toString vars.ports.beszelHub}";
KEY = vars.beszelHubKey;
};
};
# The upstream module runs beszel-agent under DynamicUser with
# ProtectSystem = "strict" and no StateDirectory, so /var/lib/beszel-agent
# (where the agent persists its hub-pairing fingerprint, per
# https://github.com/henrygd/beszel/discussions/1542) isn't writable --
# every restart silently fails to save it and regenerates a fresh one in
# memory, permanently desyncing from whatever the hub has on record after
# the very first successful pairing. Give it real persistent storage.
systemd.services.beszel-agent.serviceConfig.StateDirectory = "beszel-agent";
}