From 6a5db94ade8871f403e5b493273f51c98b3aaae7 Mon Sep 17 00:00:00 2001
From: "Kevin Veen-Birkenbach [aka. Frantz]" <kevin@veen.world>
Date: Sat, 19 Jun 2021 13:10:59 +0200
Subject: [PATCH] optimized backups-cleanup

---
 .../files/backups-cleanup.service                 |  7 +++++++
 .../files/backups-cleanup.timer                   |  9 +++++++++
 roles/native-backups-cleanup/handlers/main.yml    | 12 ++++++++++++
 roles/native-backups-cleanup/meta/main.yml        |  3 ++-
 roles/native-backups-cleanup/tasks/main.yml       | 15 +++++++++++++++
 .../backups-cleanup.py.j2}                        |  4 ++--
 site.yml                                          |  5 +++++
 7 files changed, 52 insertions(+), 3 deletions(-)
 create mode 100644 roles/native-backups-cleanup/files/backups-cleanup.service
 create mode 100644 roles/native-backups-cleanup/files/backups-cleanup.timer
 create mode 100644 roles/native-backups-cleanup/handlers/main.yml
 rename roles/native-backups-cleanup/{files/backups-cleanup.py => templates/backups-cleanup.py.j2} (89%)

diff --git a/roles/native-backups-cleanup/files/backups-cleanup.service b/roles/native-backups-cleanup/files/backups-cleanup.service
new file mode 100644
index 00000000..286a8fee
--- /dev/null
+++ b/roles/native-backups-cleanup/files/backups-cleanup.service
@@ -0,0 +1,7 @@
+[Unit]
+Description=delete old backups
+OnFailure=systemd-email@%n.service
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/python /usr/local/bin/backups-cleanup.py
diff --git a/roles/native-backups-cleanup/files/backups-cleanup.timer b/roles/native-backups-cleanup/files/backups-cleanup.timer
new file mode 100644
index 00000000..5265a849
--- /dev/null
+++ b/roles/native-backups-cleanup/files/backups-cleanup.timer
@@ -0,0 +1,9 @@
+[Unit]
+Description=starts backups-cleanup.service
+
+[Timer]
+OnCalendar=19:00
+RandomizedDelaySec=1h
+
+[Install]
+WantedBy=timers.target
diff --git a/roles/native-backups-cleanup/handlers/main.yml b/roles/native-backups-cleanup/handlers/main.yml
new file mode 100644
index 00000000..aa7db473
--- /dev/null
+++ b/roles/native-backups-cleanup/handlers/main.yml
@@ -0,0 +1,12 @@
+- name: "restart backups-cleanup.service"
+  systemd:
+    name: backups-cleanup.service
+    state: restarted
+    enabled: yes
+    daemon_reload: yes
+- name: "restart backups-cleanup.timer"
+  systemd:
+    name: backups-cleanup.timer
+    state: restarted
+    enabled: yes
+    daemon_reload: yes
diff --git a/roles/native-backups-cleanup/meta/main.yml b/roles/native-backups-cleanup/meta/main.yml
index f3b59641..651a13b8 100644
--- a/roles/native-backups-cleanup/meta/main.yml
+++ b/roles/native-backups-cleanup/meta/main.yml
@@ -1,2 +1,3 @@
 dependencies:
-- native-python-pip
+  - native-python-pip
+  - native-systemd-email
diff --git a/roles/native-backups-cleanup/tasks/main.yml b/roles/native-backups-cleanup/tasks/main.yml
index 5849e2a6..e135a563 100644
--- a/roles/native-backups-cleanup/tasks/main.yml
+++ b/roles/native-backups-cleanup/tasks/main.yml
@@ -1,3 +1,18 @@
 - name: install psutil
   pip:
     name: psutil
+
+- name: create backups-cleanup.py
+  template: src=backups-cleanup.py.j2 dest=/usr/local/bin/backups-cleanup.py
+
+- name: create backups-cleanup.service
+  copy:
+    src: backups-cleanup.service
+    dest: "/etc/systemd/system/backups-cleanup.service"
+  notify: restart backups-cleanup.service
+
+- name: create backups-cleanup.timer
+  copy:
+    src: backups-cleanup.timer
+    dest: "/etc/systemd/system/backups-cleanup.timer"
+  notify: restart backups-cleanup.timer
diff --git a/roles/native-backups-cleanup/files/backups-cleanup.py b/roles/native-backups-cleanup/templates/backups-cleanup.py.j2
similarity index 89%
rename from roles/native-backups-cleanup/files/backups-cleanup.py
rename to roles/native-backups-cleanup/templates/backups-cleanup.py.j2
index 973574d2..b3a80c8c 100644
--- a/roles/native-backups-cleanup/files/backups-cleanup.py
+++ b/roles/native-backups-cleanup/templates/backups-cleanup.py.j2
@@ -2,10 +2,10 @@
 import psutil
 import shutil
 import os
-backup_disk_path = "/media/encrypteddrive-sda/"
+backup_disk_path = "{{backup_disk_path}}"
 backups_folder_path = os.path.join(backup_disk_path, "Backups/")
 deleted = True
-while psutil.disk_usage(backup_disk_path).percent > 50 and deleted:
+while psutil.disk_usage(backup_disk_path).percent > int({{backup_space_percent}}) and deleted:
     deleted = False
     print("%d %% of disk %s are used. Freeing space..." % (psutil.disk_usage(backup_disk_path).percent,backup_disk_path))
     for primary_directory in os.listdir(backups_folder_path):
diff --git a/site.yml b/site.yml
index 1ef82ce3..6c29cb9d 100644
--- a/site.yml
+++ b/site.yml
@@ -39,6 +39,11 @@
   become: true
   roles:
     - role: native-pull-primary-backups
+- name: setup backups cleanup
+  hosts: backups_cleanup
+  become: true
+  roles:
+    - role: native-backups-cleanup
 - name: setup homepages
   hosts: homepage_hosts
   become: true