diskimage-builder/elements/ramdisk/extra-data.d/scripts/init
Ramakrishnan G 5e18777691 Add virtual media boot support in ramdisk element.
This change adds support in ramdisk element for recognising
boot from virtual media cdrom and read the parameters from
the configuration file in virtual media floppy.
Change-Id: I28ca888b4ead4905f7141b38ed4b9a3614d00d26
Closes-Bug: #1321564
2014-07-23 10:00:10 +05:30

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#!/bin/bash
# Copyright (c) 2012 NTT DOCOMO, INC.
# Copyright 2012 Hewlett-Packard Development Company, L.P.
#
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
# NOTE(bnemec): We don't want this script to exit on failures because if init
# dies then we get a kernel panic on ramdisk boot.
# dib-lint: disable=sete setu setpipefail
echo "init"
source /init-func
PATH=/sbin:/bin:/usr/bin:/usr/sbin
export PATH
mkdir -p /proc /sys /dev /boot /etc /mnt /lib/modules
mount -t proc proc /proc
FIRST_ERR_MSG=
mount -t sysfs none /sys
UDEVD=
if [ -x "/bin/systemd-udevd" ]; then
UDEVD="systemd-udevd"
else
UDEVD="udevd"
fi
# udev versions 176 and newer require a different on-disk setup
UDEVD_VERSION=$(udevadm --version)
if [ "$UDEVD_VERSION" != "" -a $UDEVD_VERSION -gt 175 ]; then
echo "Using new-style udevd setup"
mount -t devtmpfs none /dev
mkdir -p /run
mount -t tmpfs -o "nosuid,size=20%,mode=0755" tmpfs /run
mkdir -p /run/{lock,udev}
else
echo "Using old-style udevd setup"
mount -t tmpfs none /dev
ln -sf /proc/self/fd /dev/fd
mknod /dev/null c 1 3
mknod /dev/zero c 1 5
mknod /dev/random c 1 8
mknod /dev/urandom c 1 9
mknod /dev/tty0 c 4 0
mknod /dev/tty1 c 4 1
mknod /dev/tty2 c 4 2
mknod /dev/tty3 c 4 3
mknod /dev/tty4 c 4 4
mknod /dev/tty5 c 4 5
mknod /dev/tty6 c 4 6
mknod /dev/tty7 c 4 7
mknod /dev/tty8 c 4 8
mknod /dev/tty9 c 4 9
mknod /dev/tty c 5 0
mknod -m 0600 /dev/console c 5 1
mknod -m 0666 /dev/ptmx c 5 2
mkdir -p /dev/.udev/data
fi
echo "starting syslogd"
echo '*.* /initlog' > /etc/syslog.conf
syslogd
klogd
echo "starting udevd"
$UDEVD --daemon --resolve-names=never
echo "load modules"
load_modules_by_udev
# To identify that the node has booted from virtual media, a kernel
# command-line argument boot_method=vmedia is added in the iso bootloader
# configuration file (like isolinux.cfg for isolinux).
VMEDIA_BOOT_TAG="vmedia"
BOOT_METHOD=$(get_kernel_parameter boot_method)
if [ "$BOOT_METHOD" = "$VMEDIA_BOOT_TAG" ]; then
# If the node booted from virtual media cdrom, the arguments for the
# installation are provided in virtual media floppy. Find out
# the virtual media device, mount it and get the information.
configure_vmedia_dir
fi
readonly _BOOTIF_=$(get_kernel_parameter BOOTIF)
readonly _IP_=$(get_kernel_parameter ip)
readonly BOOT_MAC_ADDRESS=$(echo "$_BOOTIF_" | sed -e "s/-/:/g" | \
sed -e "s/^01://g" | tr 'a-f' 'A-F')
readonly BOOT_IP_ADDRESS=$(echo "$_IP_" | cut -d':' -f1)
readonly BOOT_SERVER=$(echo "$_IP_" | cut -d':' -f2)
readonly BOOT_NETMASK=$(echo "$_IP_" | cut -d':' -f4)
readonly BOOT_GATEWAY=$(echo "$_IP_" | cut -d':' -f3)
readonly DISK=$(get_kernel_parameter disk)
readonly DEPLOYMENT_ID=$(get_kernel_parameter deployment_id)
readonly DEPLOYMENT_KEY=$(get_kernel_parameter deployment_key)
readonly ISCSI_TARGET_IQN=$(get_kernel_parameter iscsi_target_iqn)
TROUBLESHOOT=$(get_kernel_parameter troubleshoot)