Harald Hoyer
4045aa1859
Share the check script via a parameterized mkDiskCheck function over
{ name, mountPoint, label } and iterate an attrset to emit the boot
and root services plus their daily timers.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
59 lines
1.5 KiB
Nix
59 lines
1.5 KiB
Nix
{ pkgs, config, ... }:
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let
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mkDiskCheck =
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{
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name,
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mountPoint,
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label,
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}:
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{
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serviceConfig = {
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Type = "oneshot";
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Environment = "PATH=/run/current-system/sw/bin";
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ExecStart = toString (
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pkgs.writeShellScript "${name}.sh" ''
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CURRENT=$(df ${mountPoint} | awk 'NR==2 { print $5 }' | sed 's/%//g')
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THRESHOLD=85
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if [ "$CURRENT" -gt "$THRESHOLD" ] ; then
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${pkgs.mailutils}/bin/mail -s '${mountPoint} Disk Space Alert' harald << EOF
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Your ${label} partition remaining free space is critically low. Used: $CURRENT%
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EOF
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TOKEN=$(cat ${config.sops.secrets.ntfy.path})
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${pkgs.curl}/bin/curl -s -H "Authorization: Bearer $TOKEN" \
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-H "Title: ${mountPoint} Disk Space Alert" \
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-H "Priority: high" \
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-d "${label} partition at $CURRENT%" \
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http://127.0.0.1:2586/alerts
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fi
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''
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);
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};
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wantedBy = [ "default.target" ];
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};
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checks = {
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check_boot = {
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mountPoint = "/boot";
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label = "Boot";
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};
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check_root = {
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mountPoint = "/";
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label = "Root";
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};
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};
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in
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{
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systemd.services = builtins.mapAttrs (
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name: cfg:
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mkDiskCheck {
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inherit name;
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inherit (cfg) mountPoint label;
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}
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) checks;
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systemd.timers = builtins.mapAttrs (_: _: {
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timerConfig.OnCalendar = "daily";
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wantedBy = [ "timers.target" ];
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}) checks;
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}
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