tangled.org
+94
hosts/nixery/services/docker-cleanup.nix
+94
hosts/nixery/services/docker-cleanup.nix
···
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{ config, pkgs, ... }:
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{
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systemd.services.docker-cleanup = {
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description = "Docker cleanup service - removes unused containers, networks, images, and volumes";
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serviceConfig = {
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Type = "oneshot";
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User = "root";
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ExecStart = pkgs.writeShellScript "docker-cleanup" ''
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set -e
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echo "Starting Docker cleanup at $(date)"
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# remove containers running for 15+ minutes
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echo "Removing containers running for 15+ minutes..."
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CONTAINERS_TO_REMOVE=$(${pkgs.docker}/bin/docker ps --format "table {{.ID}}\t{{.RunningFor}}" --no-trunc | awk '
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/minute/ {
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if ($2 >= 15) print $1
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}
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/hour/ {
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print $1
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}
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/day/ {
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print $1
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}
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/week/ {
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print $1
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}
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/month/ {
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print $1
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}
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/year/ {
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print $1
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}
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')
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if [ -n "$CONTAINERS_TO_REMOVE" ]; then
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echo "Found containers to remove: $CONTAINERS_TO_REMOVE"
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echo "$CONTAINERS_TO_REMOVE" | xargs -r ${pkgs.docker}/bin/docker rm -f
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else
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echo "No containers running for 15+ minutes found"
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fi
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# remove stopped containers
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echo "Removing stopped containers..."
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${pkgs.docker}/bin/docker container prune -f || true
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# remove unused networks (excluding default networks)
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echo "Removing unused networks..."
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${pkgs.docker}/bin/docker network prune -f || true
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# remove unused images (dangling images only by default)
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echo "Removing dangling images..."
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${pkgs.docker}/bin/docker image prune -f || true
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# remove unused volumes
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echo "Removing unused volumes..."
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${pkgs.docker}/bin/docker volume prune -f || true
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echo "Docker cleanup completed at $(date)"
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'';
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PrivateNetwork = false; # Needs network access for Docker
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ProtectSystem = "strict";
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ProtectHome = true;
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NoNewPrivileges = true;
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# Logging
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StandardOutput = "journal";
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StandardError = "journal";
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};
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# ensure docker is running before cleanup
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after = [ "docker.service" ];
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requires = [ "docker.service" ];
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# don't restart on failure
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restartIfChanged = false;
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};
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# timer to run the cleanup service every n minutes
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systemd.timers.docker-cleanup = {
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description = "Timer for Docker cleanup service";
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timerConfig = {
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OnCalendar = "*:0/15"; # run every 15 minutes
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Persistent = true; # persist timer across reboots
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WakeSystem = false; # run immediately if the system was powered off when timer should have run
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};
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wantedBy = [ "timers.target" ];
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};
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virtualisation.docker.enable = true;
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}