From ca73aa5b9bd8e32c73504389fda312649af4cb0d Mon Sep 17 00:00:00 2001
From: Sam Al-Sapti <sam@sapti.me>
Date: Fri, 7 Jul 2023 23:15:05 +0200
Subject: [PATCH] Add cron job to prune unused Docker data

---
 provision.sh                           | 3 ++-
 roles/docker_services/tasks/config.yml | 9 +++++++++
 roles/docker_services/tasks/main.yml   | 1 +
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/provision.sh b/provision.sh
index f0a2f71..3db3e21 100755
--- a/provision.sh
+++ b/provision.sh
@@ -7,6 +7,7 @@ usage() {
     printf '$ %s\n' "$0 [-h|--help]"
     printf '$ %s\n' "$0 [--dry] os"
     printf '$ %s\n' "$0 [--dry] docker"
+    printf '$ %s\n' "$0 [--dry] docker_config"
     printf '$ %s\n' "$0 [--dry] firewall"
     printf '$ %s\n' "$0 [--dry] ssh"
     printf '$ %s\n' "$0 [--dry] users [-i|--init]"
@@ -38,7 +39,7 @@ fi
 case $TAG in
     "")
         install_modules; $EXEC "$BASE_CMD" ;;
-    os|docker|firewall|ssh)
+    os|docker|docker_config|firewall|ssh)
         install_modules; $EXEC "$BASE_CMD --tags '$TAG'" ;;
     users)
         install_modules
diff --git a/roles/docker_services/tasks/config.yml b/roles/docker_services/tasks/config.yml
index 8a9184b..2e98725 100644
--- a/roles/docker_services/tasks/config.yml
+++ b/roles/docker_services/tasks/config.yml
@@ -17,3 +17,12 @@
     - docker.socket
     - docker.service
   when: stop is undefined or not stop
+
+- name: Configure cron job to prune unused Docker data weekly
+  ansible.builtin.cron:
+    name: Prune unused Docker data
+    cron_file: ansible_docker_prune
+    job: 'docker system prune -fa && docker volume prune -fa'
+    special_time: weekly
+    user: root
+    state: present
diff --git a/roles/docker_services/tasks/main.yml b/roles/docker_services/tasks/main.yml
index 238c48b..c29689c 100644
--- a/roles/docker_services/tasks/main.yml
+++ b/roles/docker_services/tasks/main.yml
@@ -40,6 +40,7 @@
 - name: Configure Docker
   ansible.builtin.import_tasks: config.yml
   tags:
+    - docker_config
     - reboot
 
 - name: Set up Docker services