snapshot: add support for sanoid

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2021-2022 FollieHiyuki
+Copyright (c) 2021-2023 Hoang Nguyen
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 

TODO.md

@@ -6,7 +6,7 @@ Stuff that are planned to be added/changed.
 
 - [ ] /etc/security/access.conf
 - [ ] Filesystem snapshot:
-  - [ ] sanoid / zrepl (rootfs=zfs)
+  - [ ] zrepl (rootfs=zfs)
 - [ ] Root on tmpfs
 - [ ] Filesystem backup (I don't have spare hard drives -_- so not supported for now):
   - [ ] Local incremental backups (to spare disk)

group_vars/all.yml

@@ -135,7 +135,6 @@ earlyoom:
 auditd_logrotate_daily: false
 
 # Configuration for filesystem snapshot tools ─────────────────────────────────
-# NOTE: these are examples to take note of available options
 
 snapper:
   - name: home
@@ -189,7 +188,23 @@ btrbk:
       snapshot_dir: '@snapshots'
       subvolumes: ['@']
 
+# See /etc/sanoid/sanoid.defaults.conf file for all config options
 sanoid:
+  templates:
+    production:
+      frequent_period: 30
+      hourly: 16
+      daily: 8
+      weekly: 4
+      monthly: 2
+      autosnap: 'yes'
+      autoprune: 'yes'
+  datasets:
+    rpool/ALPINE/root:
+      use_template: production
+    rpool/ALPINE/home:
+      use_template: production
+      frequent_period: 15
 
 zrepl:
 

roles/dns/files/domains-blocklist-local-additions.txt

@@ -29,3 +29,5 @@ internetbrands.com
 # Ubuntu's motd script sends way too much information to Canonical
 
 motd.ubuntu.com
+
+*.zip

roles/snapshot/tasks/sanoid.yml

@@ -1 +1,14 @@
 ---
+- name: sanoid | Install sanoid and syncoid packages
+  community.general.apk:
+    name: sanoid, syncoid
+    state: present
+
+# 'sanoid' APK package comes with a 15min cronjob, so we only need to modify the configuration file
+- name: sanoid | Create configuration file
+  template:
+    src: sanoid.conf.j2
+    dest: /etc/sanoid/sanoid.conf
+    mode: '644'
+    owner: root
+    group: root

roles/snapshot/templates/sanoid.conf.j2

@@ -0,0 +1,18 @@
+{% for dataset in (sanoid.datasets | dict2items) %}
+[{{ dataset.key }}]
+{% for option in (dataset.value | dict2items) %}
+  {{ option.key }} = {{ option.value }}
+{% endfor %}
+
+{% endfor %}
+#############################
+# templates below this line #
+#############################
+
+{% for template in (sanoid.templates | dict2items) %}
+[template_{{ template.key }}]
+{% for option in (template.value | dict2items) %}
+  {{ option.key }} = {{ option.value }}
+{% endfor %}
+
+{% endfor %}