nixos-config/machines/fuuko/services/matrix/go-neb.nix

{ config, ... }:
let
  synapseCfg = config.services.matrix-synapse;
in
{
  services.go-neb = rec {
    enable = true;
    bindAddress = "127.0.0.1:8010";
    baseUrl = "http://${bindAddress}";
    config = {
      clients = [
        ({
          UserID = "@alertmanager:${synapseCfg.server_name}";
          HomeserverURL = synapseCfg.public_baseurl;
          Sync = false;
          AutoJoinRooms = false;
          DisplayName = "Prometheus Alertmanager";
        } // (import ../../secrets/go-neb-alertmanager.nix)) # AccessToken and DeviceID
      ];
      services = [
        {
          ID = "alertmanager_service";
          Type = "alertmanager";
          UserID = "@alertmanager:${synapseCfg.server_name}";
          Config = {
            webhook_url = "${baseUrl}/services/hooks/YWxlcnRtYW5hZ2VyX3NlcnZpY2U";
            rooms = {
              "!ceigaGYfREXXSeLFiH:sbruder.de" = {
                text_template = "{{ range .Alerts }}{{ if eq .Status \"firing\" }}@room {{ end }}[{{ .Status }}] {{ index .Labels \"alertname\" }}: {{ index .Annotations \"description\" }}\n{{ end }}";
                html_template = ''
                  {{ range .Alerts }}
                    {{- if eq .Status "firing" }}@room {{ end -}}
                    {{ $severity := index .Labels "severity" }}
                    <font{{ if eq .Status "firing" -}}
                      {{- if eq $severity "critical" }} color="red"
                      {{- else if eq $severity "warning" }} color="orange"
                      {{- end -}}
                    {{- else }} color="green"
                    {{- end }}>
                    <strong>{{ if eq .Status "firing" -}}
                      [firing{{ if ne $severity "" }} - {{ $severity }}{{ end }}]
                    {{- else -}}
                      [resolved]
                    {{- end }}</strong>
                    </font>
                    {{ index .Labels "alertname" }}: {{ index .Annotations "description" }} <a href="{{ .GeneratorURL }}">source</a><br/>
                  {{ end }}
                '';
                msg_type = "m.text";
              };
            };
          };
        }
      ];
    };
  };
}