├── LICENSE ├── README.md ├── distro ├── centos-6 │ ├── deps │ ├── mod │ └── mod_lvm ├── debian-6 │ ├── deps │ ├── mod │ └── mod_lvm └── debian-7 │ ├── deps │ ├── mod │ └── mod_lvm └── install /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 2, June 1991 3 | 4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc., 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | Preamble 10 | 11 | The licenses for most software are designed to take away your 12 | freedom to share and change it. By contrast, the GNU General Public 13 | License is intended to guarantee your freedom to share and change free 14 | software--to make sure the software is free for all its users. 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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 271 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 272 | REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 273 | INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 274 | OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 275 | TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 276 | YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 277 | PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 278 | POSSIBILITY OF SUCH DAMAGES. 279 | 280 | END OF TERMS AND CONDITIONS 281 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | linux-rootfs-resize 2 | =================== 3 | 4 | Supported Linux distributions: CentOS 6, Debian 6, Debian 7. 5 | 6 | Rework of my previous project, that was limited only to CentOS 6. 7 | 8 | This tool creates new initrd (initramfs) image with ability to resize root filesystem 9 | over available space. Tipically you need this when you provision your virtual machine on 10 | OpenStack cloud for the first time (your image becomes flavor aware) 11 | 12 | For now, filesystem resize is limited to ext2, ext3 and ext4 (resize2fs) including LVM volumes. 13 | 14 | This code was successfuly tested on: CentOS 6.5, Debian 6 and Debian 7.2 15 | 16 | DEPENDENCIES: 17 | 18 | cloud-utils (https://launchpad.net/cloud-utils) 19 | parted (CentOS) 20 | 21 | INSTALL: 22 | 23 | Install git, clone this project on your machine, run 'install'. 24 | 25 | On CentOS: 26 | 27 | cd /opt 28 | rpm -ivh http://ftp-stud.hs-esslingen.de/pub/epel/6/i386/epel-release-6-8.noarch.rpm 29 | yum install git parted cloud-utils 30 | git clone https://github.com/flegmatik/linux-rootfs-resize.git 31 | cd linux-rootfs-resize 32 | ./install 33 | 34 | Tool is designed in modular fashion, so support for other distributions can be added without much work (I hope). 35 | -------------------------------------------------------------------------------- /distro/centos-6/deps: -------------------------------------------------------------------------------- 1 | growpart 2 | sfdisk 3 | e2fsck 4 | resize2fs 5 | sed 6 | awk 7 | partprobe 8 | -------------------------------------------------------------------------------- /distro/centos-6/mod: -------------------------------------------------------------------------------- 1 | growroot() 2 | { 3 | echo "[] linux-rootfs-resize ..." 4 | root_part=$(echo ${root} |sed "s/block://") 5 | root_dev=$(readlink ${root_part}| sed "s/[^a-z]//g") 6 | part_num=$(readlink ${root_part}| sed "s/[^0-9]//g") 7 | growpart -v /dev/${root_dev} ${part_num} 8 | partprobe -s /dev/${root_dev} 9 | e2fsck -p -f /dev/${root_dev}${part_num} 10 | resize2fs -p /dev/${root_dev}${part_num} 11 | } 12 | 13 | -------------------------------------------------------------------------------- /distro/centos-6/mod_lvm: -------------------------------------------------------------------------------- 1 | growroot() 2 | { 3 | echo "[] linux-rootfs-resize ..." 4 | lvm vgchange --sysinit -an 5 | lvm_lv_root=$(echo ${root} |sed "s/block://") 6 | lvm_pv_path=$(lvm pvs --noheadings |awk '{print $1}') 7 | lvm_pv_temp=$(echo ${lvm_pv_path}|sed "s/dev//g") 8 | lvm_pv_dev=$(echo ${lvm_pv_temp}| sed "s/[^a-z]//g") 9 | lvm_pv_part=$(echo ${lvm_pv_temp}| sed "s/[^0-9]//g") 10 | growpart -v /dev/${lvm_pv_dev} ${lvm_pv_part} 11 | partprobe -s /dev/${lvm_pv_dev} 12 | lvm pvresize -v ${lvm_pv_path} 13 | lvm vgchange --sysinit -ay 14 | lvm lvextend -v -l +100%FREE ${lvm_lv_root} 15 | e2fsck -p -f ${lvm_lv_root} 16 | resize2fs -p ${lvm_lv_root} 17 | } 18 | 19 | -------------------------------------------------------------------------------- /distro/debian-6/deps: -------------------------------------------------------------------------------- 1 | growpart 2 | sfdisk 3 | e2fsck 4 | resize2fs 5 | sed 6 | awk 7 | partx 8 | -------------------------------------------------------------------------------- /distro/debian-6/mod: -------------------------------------------------------------------------------- 1 | growroot() 2 | { 3 | echo "[] linux-rootfs-resize ..." 4 | root_dev=$(readlink ${ROOT}| sed "s/[^a-z]//g") 5 | part_num=$(readlink ${ROOT}| sed "s/[^0-9]//g") 6 | growpart -v /dev/${root_dev} ${part_num} 7 | e2fsck -p -f /dev/${root_dev}${part_num} 8 | resize2fs -p /dev/${root_dev}${part_num} 9 | } 10 | 11 | -------------------------------------------------------------------------------- /distro/debian-6/mod_lvm: -------------------------------------------------------------------------------- 1 | growroot() 2 | { 3 | echo "[] linux-rootfs-resize ..." 4 | lvm vgchange -an 5 | lvm_pv_path=$(lvm pvs --noheadings |awk '{print $1}') 6 | lvm_pv_temp=$(echo ${lvm_pv_path}|sed "s/dev//g") 7 | lvm_pv_dev=$(echo ${lvm_pv_temp}| sed "s/[^a-z]//g") 8 | lvm_pv_part=$(echo ${lvm_pv_temp}| sed "s/[^0-9]//g") 9 | echo "${lvm_pv_dev} ${lvm_pv_part}" 10 | growpart -v /dev/${lvm_pv_dev} ${lvm_pv_part} 11 | lvm pvresize -v ${lvm_pv_path} 12 | lvm vgchange --sysinit -ay 13 | lvm lvextend -v -l +100%FREE ${ROOT} 14 | e2fsck -p -f ${ROOT} 15 | resize2fs -p ${ROOT} 16 | } 17 | 18 | -------------------------------------------------------------------------------- /distro/debian-7/deps: -------------------------------------------------------------------------------- 1 | growpart 2 | sfdisk 3 | e2fsck 4 | resize2fs 5 | sed 6 | awk 7 | partx 8 | -------------------------------------------------------------------------------- /distro/debian-7/mod: -------------------------------------------------------------------------------- 1 | growroot() 2 | { 3 | echo "[] linux-rootfs-resize ..." 4 | root_dev=$(readlink ${ROOT}| sed "s/[^a-z]//g") 5 | part_num=$(readlink ${ROOT}| sed "s/[^0-9]//g") 6 | growpart -v /dev/${root_dev} ${part_num} 7 | e2fsck -p -f /dev/${root_dev}${part_num} 8 | resize2fs -p /dev/${root_dev}${part_num} 9 | } 10 | 11 | -------------------------------------------------------------------------------- /distro/debian-7/mod_lvm: -------------------------------------------------------------------------------- 1 | growroot() 2 | { 3 | echo "[] linux-rootfs-resize ..." 4 | lvm vgchange -an 5 | lvm_pv_path=$(lvm pvs --noheadings |awk '{print $1}') 6 | lvm_pv_temp=$(echo ${lvm_pv_path}|sed "s/dev//g") 7 | lvm_pv_dev=$(echo ${lvm_pv_temp}| sed "s/[^a-z]//g") 8 | lvm_pv_part=$(echo ${lvm_pv_temp}| sed "s/[^0-9]//g") 9 | echo "${lvm_pv_dev} ${lvm_pv_part}" 10 | growpart -v /dev/${lvm_pv_dev} ${lvm_pv_part} 11 | lvm pvresize -v ${lvm_pv_path} 12 | lvm vgchange --sysinit -ay 13 | lvm lvresize -v -l +100%FREE ${ROOT} 14 | e2fsck -p -f ${ROOT} 15 | resize2fs -p ${ROOT} 16 | } 17 | 18 | -------------------------------------------------------------------------------- /install: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | # 3 | # by robert Plestenjak, robert.plestenjak@xlab.si 4 | # 5 | # depends on: cloud-utils 6 | 7 | function deps () { 8 | for file in ${@}; do 9 | # check if is a valid file 10 | [ -f ${file} ] && 11 | # is this file new? 12 | if [ ! -f /tmp/initrd${file} ]; then 13 | cp -v ${file} /tmp/initrd${file} 14 | if [ $? != 0 ]; then 15 | # error, bug out 16 | echo "Can't copy \"${file}\"" 17 | exit 1 18 | fi 19 | fi 20 | done 21 | } 22 | 23 | function copy-tools() { 24 | # install files listed in deps.lst 25 | while read tool; do 26 | IN=0 27 | for bin_path in "${initrd_path}"; do 28 | [[ -f ${bin_path}/${tool} ]] && IN=1 29 | done 30 | if [ ${IN} -eq 0 ]; then 31 | # get tools path 32 | toolpath=$(command -v ${tool}) 33 | if [ $? != 0 ]; then 34 | # tool not installed, bug out 35 | echo "\"${tool}\" not found! Please install" 36 | exit 1 37 | fi 38 | # copy tool into initrd 39 | cp -v ${toolpath} bin/${tool} 40 | # install needed libraries 41 | deps "($(ldd ${toolpath}))" 42 | else 43 | echo "${tool} present" 44 | fi 45 | done <${inst_dir}/distro/${distro}/deps 46 | } 47 | 48 | initrd() { 49 | # clean up 50 | [ -d /tmp/initrd ] && rm -rf /tmp/initrd 51 | # create temp directory and move there 52 | mkdir /tmp/initrd && cd /tmp/initrd 53 | # extract current initrd 54 | gunzip -c ${initrd} | cpio -i --make-directories 55 | # modify 56 | copy-tools 57 | touch etc/mtab 58 | [ "${mod_type}" == "mod_lvm" ] && \ 59 | sed -i "s/locking_type = 4/locking_type = 1/" etc/lvm/lvm.conf 60 | mod_file=${inst_dir}/distro/${distro}/${mod_type} 61 | sed -i -e "/${proc_insert_point}/r ${mod_file}" -e "//N" ${init_script} 62 | sed -i "/${call_insert_point}/i ${proc_name}" ${init_script} 63 | # create new 64 | find ./ | cpio -H newc -o > /tmp/initrd.cpio 65 | gzip -c /tmp/initrd.cpio > ${initrd}-mod 66 | # clean up 67 | cd ${inst_dir} 68 | rm -rf /tmp/initrd.cpio /tmp/initrd 69 | } 70 | 71 | grub-mod() { 72 | case ${1} in 73 | "grub1") 74 | # clean existing mod 75 | grubby -o ${grub_config} --grub --remove-kernel=${kernel}-mod 76 | # create new mod 77 | # copy kernel 78 | [ ! -f ${kernel}-mod ] && cp ${kernel} ${kernel}-mod 79 | # grub title 80 | grub_title="$(cat /etc/redhat-release) $(uname -r) mod" 81 | # grub kernel (softlink) 82 | grub_kernel=${kernel}-mod 83 | # modified initrd 84 | grub_initrd=${initrd}-mod 85 | # modify grub config 86 | grubby -o ${grub_config} --grub --copy-default --add-kernel="${grub_kernel}" \ 87 | --title="${grub_title}" --initrd="${grub_initrd}" --make-default 88 | ;; 89 | "grub2") 90 | # copy kernel 91 | [ ! -f ${kernel}-mod ] && cp ${kernel} ${kernel}-mod 92 | # generate new grub2 config 93 | grub-mkconfig -o ${grub_config} 94 | ;; 95 | esac 96 | } 97 | 98 | function partition-type() { 99 | LVM=0 100 | # check if LVM tool lvs is present 101 | which lvs 2>&1 >/dev/null 102 | if [ $? -eq 0 ]; then 103 | # check for logical volumes 104 | if [[ "$(lvs --noheadings -o +lv_path)" != *No\ volume\ groups\ found* ]]; then 105 | # get rootfs mount device 106 | rootfs_device=$(mount |grep -o "^.* / " |awk '{print $1}') 107 | # look for match, set LVM true if found 108 | for lv_name in $(lvs --noheading |awk '{print $1}'); do 109 | [[ "${rootfs_device}" == *${lv_name}* ]] && LVM=1 110 | done 111 | fi 112 | fi 113 | return ${LVM} 114 | } 115 | 116 | # store directory from where we run install 117 | inst_dir=$(pwd) 118 | 119 | # set common variables 120 | partition-type 121 | [ $? -eq 1 ] && mod_type="mod_lvm" || mod_type="mod" 122 | 123 | # check distro and set distro specific variables 124 | distro="" 125 | 126 | # RedHat derivate 127 | [ -f /etc/redhat-release ] && 128 | if [[ "$(cat /etc/redhat-release)" == *(CentOS|Redhat)*\ release\ 6* ]]; then 129 | distro="centos-6" 130 | initrd_path="bin sbin usr/bin usr/sbin" 131 | kernel_version=$(uname -r) 132 | if [ -f /boot/initramfs-${kernel_version}.img ] 133 | then 134 | initrd="/boot/initramfs-$(uname -r).img" 135 | kernel="/boot/vmlinuz-$(uname -r)" 136 | else 137 | # this assumes that a box has just been built and there is only a single 138 | # kernel and initramfs, which kinda sucks, but not sure how to handle 139 | # multiple initramfs or kernels that might be present - which one is the 140 | # 'real' one? 141 | initrd=$(ls /boot/initramfs*) 142 | kernel=$(ls /boot/vmlinuz-*) 143 | fi 144 | init_script="init" 145 | proc_insert_point="^export PATH=.*" 146 | proc_name="growroot" 147 | call_insert_point="^source_all pre-mount" 148 | grub_config="/boot/grub/grub.conf" 149 | grub="grub1" 150 | fi 151 | # Debian derivate 152 | [ -f /etc/issue ] && 153 | if [[ "$(cat /etc/issue)" == *Debian\ GNU\/Linux\ 7* ]]; then 154 | distro="debian-7" 155 | initrd_path="bin sbin" 156 | initrd="/boot/initrd.img-$(uname -r)" 157 | kernel="/boot/vmlinuz-$(uname -r)" 158 | init_script="scripts/local" 159 | proc_insert_point="^mountroot()" 160 | proc_name="\ growroot" 161 | call_insert_point="^.*pre_mountroot$" 162 | grub_config="/boot/grub/grub.cfg" 163 | grub="grub2" 164 | elif [[ "$(cat /etc/issue)" == *Debian\ GNU\/Linux\ 6* ]]; then 165 | distro="debian-6" 166 | initrd_path="bin sbin" 167 | initrd="/boot/initrd.img-$(uname -r)" 168 | kernel="/boot/vmlinuz-$(uname -r)" 169 | init_script="scripts/local" 170 | proc_insert_point="^mountroot()" 171 | proc_name="\ growroot" 172 | call_insert_point="^.*pre_mountroot$" 173 | grub_config="/boot/grub/grub.cfg" 174 | grub="grub2" 175 | fi 176 | 177 | # exit if distro is not supported 178 | if [ "${distro}" == "" ]; then 179 | echo "Distribution NOT supported!" 180 | exit 1 181 | fi 182 | 183 | initrd 184 | grub-mod ${grub} 185 | 186 | exit 0 187 | --------------------------------------------------------------------------------