dotfiles/nixos/systems/toothpick/vault-agent.nix

{
  config,
  lib,
  pkgs,
  pkgs-hashicorp,
  secret,
  inputs',
  ...
}: let
  inherit
    (lib)
    singleton
    ;
in {
  services.hashicorp.vault-agent = {
    enable = true;
    package = pkgs-hashicorp.vault;

    command = "agent";

    extraPackages = with pkgs; [
      sudo
      getent
    ];

    settings = {
      vault = {
        address = "https://${secret.network.ips.vault.dns or ""}:8200";
        retry.num_retries = 5;
      };

      auto_auth.method =
        singleton
        {
          "approle" = {
            mount_path = "auth/approle";
            config = {
              role_id_file_path = "/var/secrets/approle.roleid";
              secret_id_file_path = "/var/secrets/approle.secretid";
              remove_secret_id_file_after_reading = false;
            };
          };
        };

      sink =
        singleton
        {
          "file" = {
            type = "file";
            config.path = "/run/secrets/vault-token";
          };
        };

      template = [
        {
          source =
            pkgs.writeText "consul.json.vtmpl"
            ''
              {
                "encrypt": "{{ with secret "kv/data/do-1/toothpick/consul/encryption_key" }}{{ or .Data.data.key "" }}{{ end }}",
                "acl": {
                  "tokens": {
                    "agent": "{{ with secret "kv/data/do-1/toothpick/consul/agent_token" }}{{ or .Data.data.secret "" }}{{ end }}",
                    "replication": "{{ with secret "kv/data/do-1/toothpick/consul/replication_token" }}{{ or .Data.data.secret "" }}{{ end }}",
                    "default": "{{ with secret "kv/data/do-1/toothpick/consul/anonymous_token" }}{{ or .Data.data.secret "" }}{{ end }}"
                  }
                }
              }
            '';
          destination = "/run/secrets/consul.json";
          command =
            pkgs.writeShellScript "consul-command"
            ''
              sudo systemctl try-reload-or-restart hashicorp-consul.service
            '';
        }
        {
          source =
            pkgs.writeText "nomad.json.vtmpl"
            ''
              {
                "server": {
                  "encrypt": "{{ with secret "kv/data/do-1/toothpick/nomad/encryption_key" }}{{ or .Data.data.key "" }}{{ end }}"
                },
                "acl": {
                  "replication_token": "{{ with secret "kv/data/do-1/toothpick/nomad/replication_token" }}{{ or .Data.data.secret "" }}{{ end }}"
                },
                "vault": {
                  "token": "{{ with secret "kv/data/do-1/toothpick/nomad/vault_token" }}{{ or .Data.data.secret "" }}{{ end }}"
                },
                "consul": {
                  "token": "{{ with secret "kv/data/do-1/toothpick/nomad/consul_token" }}{{ or .Data.data.secret "" }}{{ end }}"
                }
              }
            '';
          destination = "/run/secrets/nomad.json";
          command =
            pkgs.writeShellScript "nomad-command"
            ''
              sudo systemctl try-reload-or-restart hashicorp-nomad.service
            '';
        }
      ];
    };
  };
}