Add the ability to deploy installer systems and add examples.

The installer-x86_64 system is a system that can be used to install other
systems in an storage device. This system is intended to be booted by usb,
pxeboot... to install a Baserock system in your local disk.

The installer system requires the installer.configure extension to generate
a configuration file located in /etc/install.conf. With this extension
you can specify the following variables in a cluster morphology:

- INSTALLER_TARGET_STORAGE_DEVICE: Target storage device to install the
    Baserock system.
- INSTALLER_ROOTFS_TO_INSTALL: The location of the root filesystem that
    is going to be installed.
- INSTALLER_POST_INSTALL_COMMAND: Commands that will be run after the
    installation finishes. It defaults to `reboot -f`.

The installer-utils stratum is required to contain the installer-scripts
chunk. This chunk contains the installer script that is going to be
installed in /usr/lib/installer/installer.py

The clusters/installer-build-system-x86_64.morph file defines the deployment
of a installer system as a rawdisk image. This installer system will
install a build-system-x86_64 located in /rootfs into the /dev/sda device.
Also this cluster defines a subsystem which is the build-system that
is going to end up in /rootfs on the installer system.

1 files changed, 48 insertions, 0 deletions

diff --git a/installer.configure b/installer.configure
new file mode 100755
index 00000000..a77dc851
--- /dev/null
+++ b/installer.configure
@@ -0,0 +1,48 @@
+#!/usr/bin/python
+#
+# Copyright (C) 2014  Codethink Limited
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# This is a "morph deploy" configuration extension to configure an installer
+# system. It will create the configuration needed in the installer system
+# to perform an installation. It uses the following variables from the
+# environment:
+#
+#   * INSTALLER_TARGET_STORAGE_DEVICE
+#   * INSTALLER_ROOTFS_TO_INSTALL
+#   * INSTALLER_POST_INSTALL_COMMAND (optional, defaults to `reboot -f`)
+
+import os
+import sys
+import yaml
+
+install_config_file = os.path.join(sys.argv[1], 'etc', 'install.conf')
+
+try:
+    installer_configuration = {
+        'INSTALLER_TARGET_STORAGE_DEVICE': os.environ['INSTALLER_TARGET_STORAGE_DEVICE'],
+        'INSTALLER_ROOTFS_TO_INSTALL': os.environ['INSTALLER_ROOTFS_TO_INSTALL'],
+    }
+except KeyError as e:
+    print "Not configuring as an installer system"
+    sys.exit(0)
+
+postinstkey = 'INSTALLER_POST_INSTALL_COMMAND'
+installer_configuration[postinstkey] = os.environ.get(postinstkey, 'reboot -f')
+
+with open(install_config_file, 'w') as f:
+    f.write( yaml.dump(installer_configuration, default_flow_style=False) )
+
+print "Configuration of the installer system in %s" % install_config_file