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nixery: add docker-cleanup service and timer #2

merged
opened by
oppi.li 3 months ago targeting master from push-voroxwzkvvtt
Signed-off-by: oppiliappan me@oppi.li
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unified split
Changed files
+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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       }