From 67d5f5c27727e04d8f8a5ed20e79d5706cbbf1cb Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Sun, 7 Jan 2024 00:08:17 +0100
Subject: refactor: storage roles

---
 roles/storage/zfs/base/tasks/Debian.yml            | 42 +++++++++++++++
 roles/storage/zfs/base/tasks/Ubuntu.yml            |  2 +
 .../base/tasks/enable-systemd-mount-generator.yml  | 23 ++++++++
 roles/storage/zfs/base/tasks/main.yml              | 61 ++++++++++++++++++++++
 4 files changed, 128 insertions(+)
 create mode 100644 roles/storage/zfs/base/tasks/Debian.yml
 create mode 100644 roles/storage/zfs/base/tasks/Ubuntu.yml
 create mode 100644 roles/storage/zfs/base/tasks/enable-systemd-mount-generator.yml
 create mode 100644 roles/storage/zfs/base/tasks/main.yml

(limited to 'roles/storage/zfs/base/tasks')

diff --git a/roles/storage/zfs/base/tasks/Debian.yml b/roles/storage/zfs/base/tasks/Debian.yml
new file mode 100644
index 00000000..a1ed0387
--- /dev/null
+++ b/roles/storage/zfs/base/tasks/Debian.yml
@@ -0,0 +1,42 @@
+---
+- name: install dkms
+  import_role:
+    name: prepare-dkms
+
+- name: check if contrib apt component is enabled
+  assert:
+    msg: "Debian zfs packages are in contrib - please enable it using 'apt_repo_components'"
+    that:
+      - apt_repo_components is defined
+      - "'contrib' in apt_repo_components"
+
+- name: enable backports and force ZFS packages from backports for buster
+  when: (ansible_distribution_major_version | int) == 10
+  block:
+  - name: add backports repo
+    include_role:
+      name: apt-repo/backports
+
+  - name: pin zfs packages to buster-backports
+    copy:
+      content: |
+        Package: libnvpair1linux libuutil1linux libzfs2linux libzpool2linux spl-dkms zfs-dkms zfs-test zfsutils-linux zfsutils-linux-dev zfs-zed
+        Pin: release n=buster-backports
+        Pin-Priority: 990
+      dest: /etc/apt/preferences.d/zfs-from-buster-backports
+
+- name: install zfs modules via dkms
+  apt:
+    name: zfs-dkms
+    state: present
+
+- name: check if module is available for the currently running kernel
+  command: modprobe --dry-run zfs
+  check_mode: no
+  register: zfs_module_available
+  failed_when: false
+  changed_when: false
+
+- name: rebuild zfs module
+  when: zfs_module_available.rc != 0
+  command: dpkg-reconfigure zfs-dkms
diff --git a/roles/storage/zfs/base/tasks/Ubuntu.yml b/roles/storage/zfs/base/tasks/Ubuntu.yml
new file mode 100644
index 00000000..9745d716
--- /dev/null
+++ b/roles/storage/zfs/base/tasks/Ubuntu.yml
@@ -0,0 +1,2 @@
+---
+## nothing to do here - zfs modules are part of ubuntu core already
diff --git a/roles/storage/zfs/base/tasks/enable-systemd-mount-generator.yml b/roles/storage/zfs/base/tasks/enable-systemd-mount-generator.yml
new file mode 100644
index 00000000..1d50c873
--- /dev/null
+++ b/roles/storage/zfs/base/tasks/enable-systemd-mount-generator.yml
@@ -0,0 +1,23 @@
+---
+- name: enable zfs-list-cacher zlet
+  file:
+    src: /usr/lib/zfs-linux/zed.d/history_event-zfs-list-cacher.sh
+    dest: /etc/zfs/zed.d/history_event-zfs-list-cacher.sh
+    state: link
+
+- name: create base-directory for zfs-list.cache
+  file:
+    path: /etc/zfs/zfs-list.cache/
+    state: directory
+
+- name: create zfs-list.cache file for all pools
+  loop: "{{ zfs_pools | dict2items }}"
+  loop_control:
+    label: "{{ item.key }}"
+  copy:
+    content: ""
+    dest: "/etc/zfs/zfs-list.cache/{{ item.key }}"
+    force: no
+
+## TODO: if this is installed after the zpool has already been created zed needs to be triggered
+##       using something like:   zfs set canmount=on DATASET
diff --git a/roles/storage/zfs/base/tasks/main.yml b/roles/storage/zfs/base/tasks/main.yml
new file mode 100644
index 00000000..99b8e228
--- /dev/null
+++ b/roles/storage/zfs/base/tasks/main.yml
@@ -0,0 +1,61 @@
+---
+- name: configure arc size
+  when: zfs_arc_size is defined
+  copy:
+    content: |
+      options zfs zfs_arc_min={{ zfs_arc_size.min | human_to_bytes }}
+      options zfs zfs_arc_max={{ zfs_arc_size.max | human_to_bytes }}
+    dest: /etc/modprobe.d/zfs.conf
+
+- name: install zfs modules
+  include_tasks: "{{ ansible_distribution }}.yml"
+
+- name: load zfs kernel module
+  modprobe:
+    name: zfs
+    state: present
+
+- name: install zed and zfs file system utilities
+  apt:
+    name:
+    - zfsutils-linux
+    - zfs-zed
+    state: present
+
+- name: enable systemd mount-generator
+  when: zfs_use_systemd_mount_generator
+  import_tasks: enable-systemd-mount-generator.yml
+
+- name: gather zpool facts
+  zpool_facts:
+
+- name: generate list of existing pools
+  set_fact:
+    zfs_existing_pools: "{{ ansible_zfs_pools | map(attribute='name') | list }}"
+
+- name: try to import existing pools
+  loop: "{{ zfs_pools | dict2items }}"
+  loop_control:
+    label: "{{ item.key }}"
+  when: item.key not in zfs_existing_pools
+  command: "zpool import{% for dev in (item.value.create_vdevs.split(' ') | select('match', '^/dev/') ) %} -d {{ dev }}{% endfor %} -f {{ item.key }}"
+  register: zfs_import_result
+  failed_when:
+  - zfs_import_result.rc == 0
+  - (zfs_import_result.stderr_lines | reject("regex", " no such pool available$") | list | length) > 0
+  changed_when:
+  - (zfs_import_result.stderr_lines | length) == 0
+
+- name: gather zpool facts (again)
+  zpool_facts:
+
+- name: generate list of existing pools (again)
+  set_fact:
+    zfs_existing_pools: "{{ ansible_zfs_pools | map(attribute='name') | list }}"
+
+- name: create pools
+  loop: "{{ zfs_pools | dict2items }}"
+  loop_control:
+    label: "{{ item.key }}"
+  when: item.key not in zfs_existing_pools
+  command: "zpool create -m {{ item.value.mountpoint }} {% for prop, value in (item.value.properties | default(zfs_pool_default_properties)).items() %}-o {{ prop }}={{ value }} {% endfor %}{{ item.key }} {{ item.value.create_vdevs }}"
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