hosts/options/status-email.nix

82 lines
2.6 KiB
Nix

{ pkgs, lib, config, ... }:
let
fromAddress = config.email.fromAddress;
fromIdentity = config.email.fromIdentity;
toAddress = config.email.adminEmail;
cfg = config.services.statusEmail;
in
{
options.services.statusEmail = {
enable = lib.mkEnableOption "Send systemd status e-mails";
};
config = lib.mkIf cfg.enable {
email.enable = true;
systemd.services."status-email@" = let
sendStatusEmail = pkgs.writeScript "send-status-email" ''
#!${pkgs.bash}/bin/bash
from="${fromIdentity}"
to="${toAddress}"
service="$1"
full_status="$(systemctl status --full --lines 200 "$service")"
exit_code="$(echo "$full_status" | head -n5 | tail -1 | sed -e 's/.*status=\(.*\))$/\1/g')"
# state="$(systemctl is-failed "$service")"
fail_priority=1
fail_subject="Unit \"$service\" failure report (exit code $exit_code)"
success_priority=3
success_subject="Unit \"$service\" report (success)"
shift
while [ $# -gt 0 ] ; do
case "$1" in
'-s'|'--fail-subject')
fail_subject="$2"
shift 2
;;
'-p'|'--fail-priority')
fail_priority="$2"
shift 2
;;
*)
break
;;
esac
done
if [ "$exit_code" != "0/SUCCESS" ] ; then
subject="$fail_subject"
priority="$fail_priority"
else
subject="$success_subject"
priority="$success_priority"
fi
echo "Sending e-mail \"$subject\" to \"$to\"."
${pkgs.system-sendmail}/bin/sendmail -t -X - <<ERRMAIL
To: $to
From: $from
Subject: $subject
Content-Transfer-Encoding: 8bit
Content-Type: text/plain; charset=UTF-8
X-Priority: $priority
$full_status
ERRMAIL
'';
in
{
unitConfig = {
Description = "Send a status e-mail for %I";
};
serviceConfig = {
Type = "oneshot";
ExecStart = "${sendStatusEmail} %i";
};
};
};
}