copr-backend: automatic backup for log-detective.com

Fixes: https://github.com/fedora-copr/log-detective-website/issues/33

playbooks/groups/copr-backend.yml

@@ -62,3 +62,5 @@
     when: copr_messaging
   - role: rsnapshot-push
     when: env == "production"
+  - role: log-detective-backup
+    when: env == "production"

roles/log-detective-backup/defaults/main.yml

@@ -0,0 +1,5 @@
+---
+ld_backup_user: log-detective-backups
+ld_backup_path: /var/lib/copr/public_html/log-detective-backups
+ld_backup_script: /usr/bin/log-detective-backup
+ld_dump_url: https://log-detective.com/download

roles/log-detective-backup/tasks/main.yml

@@ -0,0 +1,44 @@
+---
+- name: Add the user 'log-detective-backup'
+  ansible.builtin.user:
+    name: "{{ ld_backup_user }}"
+    comment: User used for backing-up log-detective.com
+    uid: 15151
+  tags:
+    - log_detective_backup
+
+- name: create the log-detective.com backup directory
+  ansible.builtin.file:
+    path: "{{ ld_backup_path }}"
+    state: directory
+    owner: "{{ ld_backup_user }}"
+    group: "{{ ld_backup_user }}"
+    mode: '0700'
+  tags:
+    - log_detective_backup
+
+- name: install the log-detective-backup package dependencies
+  package:
+    name:
+      - wget
+    state: present
+  tags:
+    - log_detective_backup
+
+- name: install the backup script
+  template:
+    src: backup.sh.j2
+    dest: "{{ ld_backup_script }}"
+    mode: '0755'
+  tags:
+    - log_detective_backup
+
+- name: install the cron job downloading the log-detective dumps
+  ansible.builtin.cron:
+    name: "download log-detective data dump"
+    minute: "0"
+    hour: "*"
+    job: "{{ ld_backup_script }}"
+    user: "{{ ld_backup_user }}"
+  tags:
+    - log_detective_backup

roles/log-detective-backup/templates/backup.sh.j2

@@ -0,0 +1,5 @@
+#! /bin/sh
+
+basename=$(date +%s).tar.gz
+
+wget -O "{{ ld_backup_path }}/$basename" "{{ ld_dump_url }}"