61 lines
1.6 KiB
Nix
61 lines
1.6 KiB
Nix
{
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config,
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lib,
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pkgs,
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...
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}:
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{
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# TODO:
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# - assert postfix is configured
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options.mj.base.unitstatus = with lib.types; {
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enable = lib.mkEnableOption "alert by email on unit failure";
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email = lib.mkOption { type = str; };
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units = lib.mkOption {
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type = listOf str;
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default = [ ];
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};
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};
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config = lib.mkIf config.mj.base.unitstatus.enable {
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systemd.services =
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{
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"unit-status-mail@" =
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let
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# https://northernlightlabs.se/2014-07-05/systemd-status-mail-on-unit-failure.html
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script = pkgs.writeShellScript "unit-status-mail" ''
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set -e
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MAILTO="${config.mj.base.unitstatus.email}"
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UNIT=$1
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EXTRA=""
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for e in "''${@:2}"; do
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EXTRA+="$e"$'\n'
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done
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UNITSTATUS=$(${pkgs.systemd}/bin/systemctl status "$UNIT" || :)
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${pkgs.postfix}/bin/sendmail $MAILTO <<EOF
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Subject:Status mail for unit: $UNIT
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Status report for unit: $UNIT
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$EXTRA
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$UNITSTATUS
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EOF
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echo -e "Status mail sent to: $MAILTO for unit: $UNIT"
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'';
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in
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{
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description = "Send an email on unit failure";
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serviceConfig = {
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Type = "simple";
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ExecStart = ''${script} "%i" "Hostname: %H" "Machine ID: %m" "Boot ID: %b" '';
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};
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};
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}
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// lib.genAttrs config.mj.base.unitstatus.units (unit: {
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unitConfig = {
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OnFailure = "unit-status-mail@${unit}.service";
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};
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});
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};
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}
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