12 files changed, 123 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..380f61c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+boot_files/*
diff --git a/README.md b/README.md
index 8768b09..ede4cdc 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,22 @@
 # Ansible roles for OpenSLX
+Small collection of ansible roles to build a dracut-based initramfs for network boot.
+The roles currently support both Ubuntu 16.04.2 and CentOS 7.3.
+Currently, it only matches these distribution families but does not check for these exact versions!
 
+### setup-dev-tools
+Installs basic development packages for the detected distribution:
+
+    Ubuntu:		build-essential, cmake, git
+    CentOS:		"@development tools", cmake, git
+
+### dracut-initramfs-builder
+Builds the dracut-based initramfs using the dnbd3-rootfs module (see [systemd-init](http://git.openslx.org/openslx-ng/systemd-init.git/)):
+* Install needed dependencies to build dracut for the detected distribution
+* Checkout git repository for systemd-init
+* Build the initramfs for the running kernel
+* Extract both initramfs and kernel out of the virtual machine
+
+Depends on *setup-dev-tools* role (see dracut-initramfs-builder/meta/main.yml).
+
+## Usage
+Use the provided 'build-dracut-initramfs.yml' playbook for the ansible provisioner in your packer template.
diff --git a/build-dracut-initramfs.yml b/build-dracut-initramfs.yml
new file mode 100644
index 0000000..b946805
--- /dev/null
+++ b/build-dracut-initramfs.yml
@@ -0,0 +1,7 @@
+---
+- hosts: "all"
+  gather_facts: yes
+  pre_tasks:
+    - setup:
+  roles:
+    - { role: "dracut-initramfs-builder", packer_version: "0.12.2" }
diff --git a/dracut-initramfs-builder/defaults/main.yml b/dracut-initramfs-builder/defaults/main.yml
new file mode 100644
index 0000000..61e7f27
--- /dev/null
+++ b/dracut-initramfs-builder/defaults/main.yml
@@ -0,0 +1,2 @@
+---
+packer_version: "0.12.2"
diff --git a/dracut-initramfs-builder/files/.placeholder b/dracut-initramfs-builder/files/.placeholder
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/dracut-initramfs-builder/files/.placeholder
diff --git a/dracut-initramfs-builder/meta/main.yml b/dracut-initramfs-builder/meta/main.yml
new file mode 100644
index 0000000..713e243
--- /dev/null
+++ b/dracut-initramfs-builder/meta/main.yml
@@ -0,0 +1,3 @@
+---
+dependencies:
+  - { role: setup-dev-tools }
diff --git a/dracut-initramfs-builder/tasks/distro.yml b/dracut-initramfs-builder/tasks/distro.yml
new file mode 100644
index 0000000..3212eae
--- /dev/null
+++ b/dracut-initramfs-builder/tasks/distro.yml
@@ -0,0 +1,25 @@
+---
+- set_fact:
+    pkgnames:
+      - kernel-devel
+      - fuse-devel
+      - jansson-devel
+      - glib2-devel
+      - pixman-devel
+      - libewf-devel
+      - afflib-devel
+      - device-mapper
+  when:
+      - ansible_distribution == "CentOS"
+- set_fact:
+    pkgnames:
+      - libfuse-dev
+      - libglib2.0-dev
+      - libpixman-1-dev
+      - libewf-dev
+      - libafflib-dev
+      - dmsetup
+      - iputils-arping
+  when:
+      - ansible_distribution == "Ubuntu"
+
diff --git a/dracut-initramfs-builder/tasks/main.yml b/dracut-initramfs-builder/tasks/main.yml
new file mode 100644
index 0000000..9cb25be
--- /dev/null
+++ b/dracut-initramfs-builder/tasks/main.yml
@@ -0,0 +1,37 @@
+---
+- include: tasks/distro.yml
+
+- name: Install dependencies for OpenSLX dracut module
+  package: name={{ item }} state=installed
+  with_items: "{{ pkgnames }}"
+
+- name: Checkout repository of OpenSLX dracut module
+  git:
+    repo: "{{ gitsource }}"
+    dest: "{{ gittarget }}"
+    depth: 1
+- name: Hack: fix dnbd3 blk.h for CentOS (one day this should get fixed in dnbd3 :))
+  replace:
+    dest: "{{ gittarget }}/builder/modules.d/dnbd3-rootfs/scripts/build.sh"
+    regexp: 'make -j4 dnbd3 dnbd3-client'
+    replace: 'sed -i "s/KERNEL_VERSION.*/KERNEL_VERSION\(3, 10, 0\)/g" blk.h && make -j4 dnbd3 dnbd3-client'
+    backup: yes
+  when:
+    - ansible_distribution == "CentOS"
+- name: Build initramfs with dracut
+  shell:  "{{ gittarget }}/builder/build-initramfs.sh -s -d -p {{ gittarget }}/initramfs"
+  args:
+    creates: "{{ gittarget }}/initramfs"
+- name: Fetch built initramfs and kernel (+ hack for weird /@ prefix of BOOT_IMAGE)
+  fetch:
+    src: "{{ item }}"
+    dest: "{{ playbook_dir }}/boot_files/"
+    fail_on_missing: yes
+    flat: yes
+  with_items:
+    - "{{ gittarget }}/initramfs"
+    - "{{ ansible_cmdline.BOOT_IMAGE | regex_replace('^/@(/boot/.*)+$', '\\1') }}"
+- name: Cleanup
+  file:
+    path: "{{ gittarget }}"
+    state: absent
diff --git a/dracut-initramfs-builder/vars/main.yml b/dracut-initramfs-builder/vars/main.yml
new file mode 100644
index 0000000..e8f7c48
--- /dev/null
+++ b/dracut-initramfs-builder/vars/main.yml
@@ -0,0 +1,2 @@
+gitsource: "git://git.openslx.org/openslx-ng/systemd-init"
+gittarget: "/opt/systemd-init"
diff --git a/setup-dev-tools/defaults/main.yml b/setup-dev-tools/defaults/main.yml
new file mode 100644
index 0000000..61e7f27
--- /dev/null
+++ b/setup-dev-tools/defaults/main.yml
@@ -0,0 +1,2 @@
+---
+packer_version: "0.12.2"
diff --git a/setup-dev-tools/tasks/distro.yml b/setup-dev-tools/tasks/distro.yml
new file mode 100644
index 0000000..0f120ec
--- /dev/null
+++ b/setup-dev-tools/tasks/distro.yml
@@ -0,0 +1,16 @@
+---
+# This sets the package names for the supported distros.
+- set_fact: 
+    pkgnames:
+      - "build-essential"
+      - "cmake"
+      - "git"
+  when:
+    - ansible_distribution == "Ubuntu"
+- set_fact: 
+    pkgnames:
+      - "@development tools"
+      - "cmake"
+      - "git"
+  when:
+    - ansible_distribution == "CentOS"
diff --git a/setup-dev-tools/tasks/main.yml b/setup-dev-tools/tasks/main.yml
new file mode 100644
index 0000000..62a176f
--- /dev/null
+++ b/setup-dev-tools/tasks/main.yml
@@ -0,0 +1,8 @@
+---
+# Get packages names for the target distro
+- include: tasks/distro.yml
+
+# Finally lets install those packages
+- name: Install dev tools
+  package: name={{ item }} state=installed
+  with_items: "{{ pkgnames }}"