greatly improved dkms handling

3 files changed, 62 insertions, 0 deletions

diff --git a/roles/prepare-dkms/files/my_scw-fetch-kernel-sources b/roles/prepare-dkms/files/my_scw-fetch-kernel-sources
new file mode 100644
index 00000000..1b5333b5
--- /dev/null
+++ b/roles/prepare-dkms/files/my_scw-fetch-kernel-sources
@@ -0,0 +1,29 @@
+#!/bin/bash
+
+# this is based on:
+# https://github.com/scaleway/kernel-tools#how-to-build-a-custom-kernel-module
+
+set -e
+
+# Determine versions
+arch="$(uname -m)"
+release="$(uname -r)"
+upstream="${release%%-*}"
+local="${release#*-}"
+
+export PATH="${PATH:+$PATH:}/usr/bin:/bin:/usr/local/bin:/sbin:/usr/sbin:/usr/local/sbin"
+
+# Get kernel sources
+mkdir -p /usr/src
+rm -f "/usr/src/linux-${upstream}.tar.xz"
+rm -rf "/usr/src/linux-${upstream}"
+wget -O "/usr/src/linux-${upstream}.tar.xz" "https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-${upstream}.tar.xz"
+tar xf "/usr/src/linux-${upstream}.tar.xz" -C /usr/src/
+ln -fns "/usr/src/linux-${upstream}" /usr/src/linux
+ln -fns "/usr/src/linux-${upstream}" "/lib/modules/${release}/build"
+
+# Prepare kernel
+zcat /proc/config.gz > /usr/src/linux/.config
+printf 'CONFIG_LOCALVERSION="%s"\nCONFIG_CROSS_COMPILE=""\n' "${local:+-$local}" >> /usr/src/linux/.config
+wget -O /usr/src/linux/Module.symvers "http://mirror.scaleway.com/kernel/${arch}/${release}/Module.symvers"
+make -C /usr/src/linux prepare modules_prepare
diff --git a/roles/prepare-dkms/handlers/main.yml b/roles/prepare-dkms/handlers/main.yml
new file mode 100644
index 00000000..ab281326
--- /dev/null
+++ b/roles/prepare-dkms/handlers/main.yml
@@ -0,0 +1,3 @@
+---
+- name: fetch scaleway kernel sources
+  command: /usr/local/sbin/my_scw-fetch-kernel-sources
diff --git a/roles/prepare-dkms/tasks/scaleway.yml b/roles/prepare-dkms/tasks/scaleway.yml
new file mode 100644
index 00000000..57626d15
--- /dev/null
+++ b/roles/prepare-dkms/tasks/scaleway.yml
@@ -0,0 +1,30 @@
+---
+- name: install build deps and dkms
+  with_items:
+  - build-essential
+  - libssl-dev
+  - dkms
+  apt:
+    name: "{{ item }}"
+    state: present
+
+- name: install (sadly missing) script to fetch kernel sources
+  copy:
+    src: my_scw-fetch-kernel-sources
+    dest: /usr/local/sbin/
+    mode: 0755
+  notify: fetch scaleway kernel sources
+
+- name: check if sources are already initialized
+  stat:
+    path: "/lib/modules/{{ ansible_kernel }}/build"
+    follow: yes
+    get_mime: no
+    get_checksum: no
+    get_md5: no
+  register: build_directory
+  changed_when: build_directory.stat.exists == False
+  notify: fetch scaleway kernel sources
+
+- name: fetch kernel sources
+  meta: flush_handlers