From f41199feae553f0d2269f507382a82470277c8ae Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Mon, 9 Sep 2019 21:53:08 +0200
Subject: added zfs role

---
 dan/sk-2019vm.yml                    |  1 +
 dan/sk-cloudia.yml                   |  1 +
 roles/prepare-dkms/tasks/default.yml | 10 +++++++++-
 roles/prepare-dkms/tasks/main.yml    |  6 ++++--
 roles/prepare-dkms/vars/Debian.yml   |  2 ++
 roles/prepare-dkms/vars/Ubuntu.yml   |  2 ++
 roles/zfs/meta/main.yml              |  3 +++
 roles/zfs/tasks/main.yml             | 26 ++++++++++++++++++++++++++
 8 files changed, 48 insertions(+), 3 deletions(-)
 create mode 100644 roles/prepare-dkms/vars/Debian.yml
 create mode 100644 roles/prepare-dkms/vars/Ubuntu.yml
 create mode 100644 roles/zfs/meta/main.yml
 create mode 100644 roles/zfs/tasks/main.yml

diff --git a/dan/sk-2019vm.yml b/dan/sk-2019vm.yml
index 10a633b0..6c2b1448 100644
--- a/dan/sk-2019vm.yml
+++ b/dan/sk-2019vm.yml
@@ -5,3 +5,4 @@
   - role: base
   - role: sshd
   - role: zsh
+  - role: zfs
diff --git a/dan/sk-cloudia.yml b/dan/sk-cloudia.yml
index 6d22afed..dca8b9f8 100644
--- a/dan/sk-cloudia.yml
+++ b/dan/sk-cloudia.yml
@@ -5,3 +5,4 @@
   - role: base
   - role: sshd
   - role: zsh
+  - role: zfs
diff --git a/roles/prepare-dkms/tasks/default.yml b/roles/prepare-dkms/tasks/default.yml
index 638b81f0..84ab3624 100644
--- a/roles/prepare-dkms/tasks/default.yml
+++ b/roles/prepare-dkms/tasks/default.yml
@@ -1,7 +1,15 @@
 ---
+- name: load distrubtion specific variables
+  include_vars: "{{ item }}"
+  with_first_found:
+    - files:
+        - "{{ ansible_distribution_release }}.yml"
+        - "{{ ansible_distribution }}.yml"
+      skip: true
+
 - name: install kernel headers and dkms
   apt:
     name:
-    - linux-headers-amd64    # TODO: fix this so it works for ubuntu(hwe) and debian
+    - "{{ dkms_linux_header_pkgname }}"
     - dkms
     state: present
diff --git a/roles/prepare-dkms/tasks/main.yml b/roles/prepare-dkms/tasks/main.yml
index 94f47c31..23533345 100644
--- a/roles/prepare-dkms/tasks/main.yml
+++ b/roles/prepare-dkms/tasks/main.yml
@@ -5,8 +5,10 @@
 
 - name: prepare dkms on for raspberry-pi
   include_tasks: raspberrypi.yml
-  when: "ansible_lsb.id == 'Raspbian'"
+  when: "('id' in ansible_lsb and ansible_lsb.id == 'Raspbian')"
 
 - name: prepare dkms on normal debian boxes
   include_tasks: default.yml
-  when: "'scaleway-kernel' not in group_names and ansible_lsb.id != 'Raspbian'"
+  when:
+    - "'scaleway-kernel' not in group_names"
+    - "('id' not in ansible_lsb or ansible_lsb.id != 'Raspbian')"
diff --git a/roles/prepare-dkms/vars/Debian.yml b/roles/prepare-dkms/vars/Debian.yml
new file mode 100644
index 00000000..108306c6
--- /dev/null
+++ b/roles/prepare-dkms/vars/Debian.yml
@@ -0,0 +1,2 @@
+---
+dkms_linux_header_pkgname: linux-image-amd64
diff --git a/roles/prepare-dkms/vars/Ubuntu.yml b/roles/prepare-dkms/vars/Ubuntu.yml
new file mode 100644
index 00000000..a848f713
--- /dev/null
+++ b/roles/prepare-dkms/vars/Ubuntu.yml
@@ -0,0 +1,2 @@
+---
+dkms_linux_header_pkgname: linux-headers-generic
diff --git a/roles/zfs/meta/main.yml b/roles/zfs/meta/main.yml
new file mode 100644
index 00000000..300d0ccf
--- /dev/null
+++ b/roles/zfs/meta/main.yml
@@ -0,0 +1,3 @@
+---
+dependencies:
+- role: prepare-dkms
diff --git a/roles/zfs/tasks/main.yml b/roles/zfs/tasks/main.yml
new file mode 100644
index 00000000..478a25dd
--- /dev/null
+++ b/roles/zfs/tasks/main.yml
@@ -0,0 +1,26 @@
+---
+## TODO: @debian: make sure contrib repo is added
+
+- name: install zfs packages
+  apt:
+    name:
+    - zfs-dkms
+    - zfsutils-linux
+    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
+
+- name: check again if module is available for the currently running kernel
+  when: zfs_module_available.rc != 0
+  command: modprobe --dry-run zfs
+  check_mode: no
+  changed_when: false
-- 
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