Start of zrepl role.

Currently only doing FreeBSD.

ansible/environments/home/host_vars/homeserver

@@ -1 +1,3 @@
 os_flavor: "freebsd"
+zfs_snapshot_datasets:
+  - zroot/freebsd/computer/be/default

ansible/environments/laptop/host_vars/odolinux

@@ -10,3 +10,6 @@ users:
       - name: users
       - name: docker
       - name: libvirt
+zfs_snapshot_datasets:
+  - zroot/linux/archmain/home
+  - zroot/linux/archmain/be

ansible/playbook.yaml

@@ -4,3 +4,4 @@
   roles:
     - sudo
     - users
+    - zrepl

ansible/roles/zrepl/handlers/main.yml

@@ -0,0 +1,4 @@
+- name: restart zrepl
+  service:
+    name: zrepl
+    state: restarted

ansible/roles/zrepl/meta/main.yaml

@@ -0,0 +1,2 @@
+dependencies:
+  - users

ansible/roles/zrepl/tasks/common.yaml

@@ -0,0 +1,31 @@
+- name: Install packages
+  package:
+    name:
+      - zrepl
+    state: present
+
+- name: Create directories
+  file:
+    name: "{{ item }}"
+    state: directory
+    mode: 0750
+    owner: root
+    group: wheel
+  loop:
+    - /usr/local/etc/zrepl
+
+- name: Configure zrepl
+  template:
+    src: templates/zrepl.yml.j2
+    dest: /usr/local/etc/zrepl/zrepl.yml
+    mode: 0440
+    owner: root
+    group: wheel
+    validate: "zrepl configcheck --config %s"
+  notify: "restart zrepl"
+
+- include: tasks/freebsd.yaml
+  when: 'os_flavor == "freebsd"'
+
+- include: tasks/linux.yaml
+  when: 'os_flavor == "linux"'

ansible/roles/zrepl/tasks/main.yaml

@@ -0,0 +1,2 @@
+- include: tasks/common.yaml
+  when: zfs_snapshot_datasets is defined

ansible/roles/zrepl/templates/zrepl.yml.j2

@@ -0,0 +1,29 @@
+jobs:
+
+# this job takes care of snapshot creation + pruning
+- name: snapjob
+  type: snap
+  filesystems: {
+{% for dataset in zfs_snapshot_datasets %}
+      "{{dataset}}<": true,
+{% endfor %}
+  }
+  # create snapshots with prefix `zrepl_` every 15 minutes
+  snapshotting:
+    type: periodic
+    interval: 15m
+    prefix: zrepl_
+  pruning:
+    keep:
+    # fade-out scheme for snapshots starting with `zrepl_`
+    # - keep all created in the last hour
+    # - then destroy snapshots such that we keep 24 each 1 hour apart
+    # - then destroy snapshots such that we keep 14 each 1 day apart
+    # - then destroy all older snapshots
+    - type: grid
+      grid: 1x1h(keep=all) | 24x1h | 14x1d
+      regex: "^zrepl_.*"
+    # keep all snapshots that don't have the `zrepl_` prefix
+    - type: regex
+      negate: true
+      regex: "^zrepl_.*"