From 272532f75b80a04e908c3b84f93ab079030dd009 Mon Sep 17 00:00:00 2001 From: Pedro Alvarez Date: Sun, 9 Nov 2014 22:50:50 +0000 Subject: Add the ability to deploy installer systems This patch adds a baserock installer script and example of the install.conf file needed by the installer script, and a manifest file to use it in a cluster morphology for deploying an installer system. The installer script (installer.py) uses the rawdisk.write extension to deploy a baserock system to a disk. It reads from /etc/install.conf the configuration needed to install the system, but if this configuration is not present the installer scrpit will ask the information needed. --- installer/etc/install.conf | 3 + installer/installer.py | 178 +++++++++++++++++++++++++++++++++++++++++++++ installer/manifest | 3 + 3 files changed, 184 insertions(+) create mode 100644 installer/etc/install.conf create mode 100755 installer/installer.py create mode 100644 installer/manifest diff --git a/installer/etc/install.conf b/installer/etc/install.conf new file mode 100644 index 00000000..591d8c3b --- /dev/null +++ b/installer/etc/install.conf @@ -0,0 +1,3 @@ +[install] +rootfs = /rootfs +device = /dev/sda diff --git a/installer/installer.py b/installer/installer.py new file mode 100755 index 00000000..aec43591 --- /dev/null +++ b/installer/installer.py @@ -0,0 +1,178 @@ +#!/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. + + +'''A Baserock installer.''' + + + +import morphlib +import ConfigParser +import os +import re +import sys +import json +import subprocess +import tempfile +import errno +import time + +class BaserockInstaller(): + + config_file = '/etc/install.conf' + to_mount = ( + ('/proc', 'proc', 'none'), + ('/sys', 'sysfs', 'none'), + + ) + + def run(self): + try: + print "Baserock installation script begins..." + mounted = self.do_mounts(self.to_mount) + + rawdisk_path = morphlib.extensions._get_morph_extension_filename( + 'rawdisk', '.write') + + disk_dest, rootfs = self.check_and_read_config(self.config_file) + self.validate_install_values(disk_dest, rootfs) + + deployment_config=self.get_deployment_config(rootfs) + + install_script = self.create_install_script(rawdisk_path, + deployment_config, rootfs, disk_dest) + + self.install_system(install_script) + os.remove(install_script) + self.do_unmounts(mounted) + self.finish_and_reboot() + except BaseException, e: + print "Something failed, opening shell..." + print "Once you have finished, use `reboot -f`" + os.system('/bin/sh') + + def validate_install_values(self, disk_dest, rootfs): + if not self.deploying_to_device(disk_dest): + print "ERROR: Not deploying to a device" + raise BaseException + if not os.path.exists(disk_dest): + print "ERROR: The device %s doesn't exist." % disk_dest + raise BaseException + if not self.is_baserock_rootfs(rootfs): + print "ERROR: The rootfs %s is not a baserock rootfs." % rootfs + raise BaseException + + def is_baserock_rootfs(self, rootfs): + if os.path.isdir(os.path.join(rootfs, 'baserock')): + return True + return False + + def create_install_script(self, rawdisk_path, deployment_config, + rootfs, disk_dest): + fd, script = tempfile.mkstemp() + with os.fdopen(fd, 'w') as fp: + fp.write('#!/bin/sh\n') + fp.write('env ') + for name in deployment_config: + if deployment_config[name] is not None: + fp.write('%s="%s" ' % (name, deployment_config[name])) + fp.write("%s %s %s\n" % (rawdisk_path, rootfs, disk_dest)) + return script + + def finish_and_reboot(self): + os.system("sync") + print "Rebooting in 5 seconds..." + time.sleep(5) + os.system("reboot -f") + + def do_mounts(self, to_mount): + mounted = [] + for mount_point, mount_type, source in to_mount: + print 'Mounting %s in %s' % (source, mount_point) + if not os.path.exists(mount_point): + os.makedirs(mount_point) + if self.mount( source, mount_point, mount_type) == 0: + mounted.append(mount_point) + return mounted + + def mount(self, partition, mount_point, fstype=None): + if not fstype: + fstype = '' + else: + fstype = '-t %s' % fstype + mount_command = "mount %s %s %s" % (partition, mount_point, fstype) + child = subprocess.Popen(mount_command, shell=True) + child.communicate()[0] + return child.returncode + + def do_unmounts(self, to_unmount): + for path in reversed(to_unmount): + print 'Unmounting %s' % path + unmount_command = "umount %s" % (path) + subprocess.Popen(unmount_command, shell=True) + + def check_and_read_config(self, config_file): + print "Reading configuration from %s..." % config_file + config = ConfigParser.RawConfigParser() + config.read(config_file) + keys = ('device', 'rootfs') + + device, rootfs = (self.read_option(config, 'install', key) + for key in keys) + return device, rootfs + + def read_option(self, config, section, option): + try: + value = config.get(section, option) + except: + value = raw_input("Option '%s.%s' missing, please enter a value: " + % (section, option)) + print "Option '%s.%s' with value '%s" % (section, option, value) + return value + + def get_deployment_config(self, rootfs): + print "Reading deployment.meta of the system to install..." + try: + meta = open(os.path.join(rootfs, 'baserock/deployment.meta')) + except IOError as e: + if e.errno != errno.ENOENT: + raise + print "Failed to read deployment.meta, it will be empty" + deployment_config = {} + else: + deployment_config = json.load(meta).get('configuration', {}) + meta.close() + print "################ Environment #################" + for key in deployment_config: + print "# %s: %s" % (key, deployment_config[key]) + print "##############################################" + return deployment_config + + + def install_system(self, install_script): + run_script = "sh %s" % install_script + process = subprocess.Popen(run_script, shell=True, stdout=subprocess.PIPE) + for line in iter(process.stdout.readline, ''): + sys.stdout.write(line) + + def deploying_to_device(self, location): + dev_regex = re.compile("^/dev/((sd|vd|mmcblk|hd)[a-z0-9]+)$") + if dev_regex.match(location): + return True + return False + + +BaserockInstaller().run() diff --git a/installer/manifest b/installer/manifest new file mode 100644 index 00000000..c7c5cab3 --- /dev/null +++ b/installer/manifest @@ -0,0 +1,3 @@ +0100755 0 0 /installer.py +0040755 0 0 /etc +0100644 0 0 /etc/install.conf -- cgit v1.2.1