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|
{ config, lib, pkgs, ... }: with lib; let
out = {
options.krebs.on-failure = api;
config = lib.mkIf cfg.enable imp;
};
cfg = config.krebs.on-failure;
api = {
enable = mkEnableOption "krebs.on-failure" // {
default = cfg.plans != {};
};
plans = mkOption {
default = {};
type = let
inherit (config) krebs;
in types.attrsOf (types.submodule ({ config, ... }: {
options = {
enable = mkEnableOption "krebs.on-failure.${config.name}" // {
default = true;
};
journalctl = {
lines = mkOption {
type = types.int;
default = 100;
};
output = mkOption {
type = types.enum [
"cat"
"export"
"json"
"json-pretty"
"json-sse"
"short"
"short-iso"
"short-precise"
"verbose"
];
default = "short-iso";
};
};
mailto = mkOption {
type = types.str;
default = krebs.build.user.mail;
description = "Mail address to send journal extract to.";
};
subject = mkOption {
type = types.str;
default = "[${krebs.build.host.name}] ${config.name} has failed";
};
name = mkOption {
type = types.str;
default = config._module.args.name;
description = "Name of the to-be-monitored service.";
};
};
}));
};
sendmail = mkOption {
type = types.str;
default = "/run/wrappers/bin/sendmail";
};
};
imp = {
systemd.services = foldl (a: b: a // b) {} (map to-services enabled-plans);
};
enabled-plans = filter (getAttr "enable") (attrValues cfg.plans);
to-services = plan: {
"${plan.name}".unitConfig.OnFailure = "on-failure.${plan.name}.service";
"on-failure.${plan.name}".serviceConfig = rec {
ExecStart = start plan;
SyslogIdentifier = ExecStart.name;
Type = "oneshot";
};
};
start = plan: pkgs.writeDash "on-failure.${plan.name}" ''
{ echo Subject: ${shell.escape plan.subject}
echo To: ${shell.escape plan.mailto}
echo
${pkgs.systemd}/bin/journalctl \
--lines=${toString plan.journalctl.lines} \
--output=${plan.journalctl.output} \
--since="$(
${pkgs.coreutils}/bin/date +'%F %T UTC' -ud "$(
${pkgs.systemd}/bin/systemctl show \
-p ExecMainStartTimestamp \
${shell.escape plan.name} \
| ${pkgs.coreutils}/bin/cut -d= -f2-
)"
)" \
--unit=${shell.escape plan.name}.service
} | ${shell.escape cfg.sendmail} -t
'';
in out
|
