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#!/bin/bash | |
# The MIT License (MIT) | |
# | |
# Copyright (c) 2015 Microsoft Azure | |
# | |
# Permission is hereby granted, free of charge, to any person obtaining a copy | |
# of this software and associated documentation files (the "Software"), to deal | |
# in the Software without restriction, including without limitation the rights | |
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
# copies of the Software, and to permit persons to whom the Software is | |
# furnished to do so, subject to the following conditions: | |
# | |
# The above copyright notice and this permission notice shall be included in all | |
# copies or substantial portions of the Software. | |
# | |
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
# SOFTWARE. | |
# | |
# Script Name: vm-disk-utils.sh | |
# Author: Trent Swanson - Full Scale 180 Inc github:(trentmswanson) | |
# Version: 0.1 | |
# Last Modified By: Trent Swanson | |
# Description: | |
# This script automates the partitioning and formatting of data disks | |
# Data disks can be partitioned and formatted as seperate disks or in a RAID0 configuration | |
# The script will scan for unpartitioned and unformatted data disks and partition, format, and add fstab entries | |
# Parameters : | |
# 1 - b: The base directory for mount points (default: /datadisks) | |
# 2 - s Create a striped RAID0 Array (No redundancy) | |
# 3 - h Help | |
# 4 - o Mount options for mount points | |
# Note : | |
# This script has only been tested on Ubuntu 12.04 LTS and must be root | |
help() | |
{ | |
echo "Usage: $(basename $0) [-b data_base] [-h] [-s] [-o mount_options]" | |
echo "" | |
echo "Options:" | |
echo " -b base directory for mount points (default: /datadisks)" | |
echo " -h this help message" | |
echo " -s create a striped RAID array (no redundancy)" | |
echo " -o mount options for data disk" | |
} | |
log() | |
{ | |
# Un-comment the following if you would like to enable logging to a service | |
#curl -X POST -H "content-type:text/plain" --data-binary "${HOSTNAME} - $1" https://logs-01.loggly.com/inputs/<key>/tag/es-extension,${HOSTNAME} | |
echo "$1" | |
} | |
if [ "${UID}" -ne 0 ]; | |
then | |
log "Script executed without root permissions" | |
echo "You must be root to run this program." >&2 | |
exit 3 | |
fi | |
# Base path for data disk mount points | |
DATA_BASE="/datadisks" | |
# Mount options for data disk | |
MOUNT_OPTIONS="noatime,nodiratime,nodev,noexec,nosuid,nofail" | |
# Determines wheter partition and format data disks as raid set or not | |
RAID_CONFIGURATION=0 | |
while getopts b:sho: optname; do | |
log "Option $optname set with value ${OPTARG}" | |
case ${optname} in | |
b) #set clsuter name | |
DATA_BASE=${OPTARG} | |
;; | |
s) #Partition and format data disks as raid set | |
RAID_CONFIGURATION=1 | |
;; | |
o) #mount option | |
MOUNT_OPTIONS=${OPTARG} | |
;; | |
h) #show help | |
help | |
exit 2 | |
;; | |
\?) #unrecognized option - show help | |
echo -e \\n"Option -${BOLD}$OPTARG${NORM} not allowed." | |
help | |
exit 2 | |
;; | |
esac | |
done | |
get_next_md_device() { | |
shopt -s extglob | |
LAST_DEVICE=$(ls -1 /dev/md+([0-9]) 2>/dev/null|sort -n|tail -n1) | |
if [ -z "${LAST_DEVICE}" ]; then | |
NEXT=/dev/md0 | |
else | |
NUMBER=$((${LAST_DEVICE/\/dev\/md/})) | |
NEXT=/dev/md${NUMBER} | |
fi | |
echo ${NEXT} | |
} | |
is_partitioned() { | |
OUTPUT=$(partx -s ${1} 2>&1) | |
egrep "partition table does not contains usable partitions|failed to read partition table" <<< "${OUTPUT}" >/dev/null 2>&1 | |
if [ ${?} -eq 0 ]; then | |
return 1 | |
else | |
return 0 | |
fi | |
} | |
has_filesystem() { | |
DEVICE=${1} | |
OUTPUT=$(file -L -s ${DEVICE}) | |
grep filesystem <<< "${OUTPUT}" > /dev/null 2>&1 | |
return ${?} | |
} | |
scan_for_new_disks() { | |
# Looks for unpartitioned disks | |
declare -a RET | |
DEVS=($(ls -1 /dev/sd*|egrep -v "[0-9]$")) | |
for DEV in "${DEVS[@]}"; | |
do | |
# The disk will be considered a candidate for partitioning | |
# and formatting if it does not have a sd?1 entry or | |
# if it does have an sd?1 entry and does not contain a filesystem | |
is_partitioned "${DEV}" | |
if [ ${?} -eq 0 ]; | |
then | |
has_filesystem "${DEV}1" | |
if [ ${?} -ne 0 ]; | |
then | |
RET+=" ${DEV}" | |
fi | |
else | |
RET+=" ${DEV}" | |
fi | |
done | |
echo "${RET}" | |
} | |
get_next_mountpoint() { | |
DIRS=$(ls -1d ${DATA_BASE}/disk* 2>/dev/null| sort --version-sort) | |
MAX=$(echo "${DIRS}"|tail -n 1 | tr -d "[a-zA-Z/]") | |
if [ -z "${MAX}" ]; | |
then | |
echo "${DATA_BASE}/disk1" | |
return | |
fi | |
IDX=1 | |
while [ "${IDX}" -lt "${MAX}" ]; | |
do | |
NEXT_DIR="${DATA_BASE}/disk${IDX}" | |
if [ ! -d "${NEXT_DIR}" ]; | |
then | |
echo "${NEXT_DIR}" | |
return | |
fi | |
IDX=$(( ${IDX} + 1 )) | |
done | |
IDX=$(( ${MAX} + 1)) | |
echo "${DATA_BASE}/disk${IDX}" | |
} | |
add_to_fstab() { | |
UUID=${1} | |
MOUNTPOINT=${2} | |
grep "${UUID}" /etc/fstab >/dev/null 2>&1 | |
if [ ${?} -eq 0 ]; | |
then | |
echo "Not adding ${UUID} to fstab again (it's already there!)" | |
else | |
LINE="UUID=\"${UUID}\"\t${MOUNTPOINT}\text4\t${MOUNT_OPTIONS}\t1 2" | |
echo -e "${LINE}" >> /etc/fstab | |
fi | |
} | |
do_partition() { | |
# This function creates one (1) primary partition on the | |
# disk, using all available space | |
_disk=${1} | |
_type=${2} | |
if [ -z "${_type}" ]; then | |
# default to Linux partition type (ie, ext3/ext4/xfs) | |
_type=83 | |
fi | |
echo "n | |
p | |
1 | |
t | |
${_type} | |
w"| fdisk "${_disk}" | |
# | |
# Use the bash-specific $PIPESTATUS to ensure we get the correct exit code | |
# from fdisk and not from echo | |
if [ ${PIPESTATUS[1]} -ne 0 ]; | |
then | |
echo "An error occurred partitioning ${_disk}" >&2 | |
echo "I cannot continue" >&2 | |
exit 2 | |
fi | |
} | |
#end do_partition | |
scan_partition_format() | |
{ | |
log "Begin scanning and formatting data disks" | |
DISKS=($(scan_for_new_disks)) | |
if [ "${#DISKS}" -eq 0 ]; | |
then | |
log "No unpartitioned disks without filesystems detected" | |
return | |
fi | |
echo "Disks are ${DISKS[@]}" | |
for DISK in "${DISKS[@]}"; | |
do | |
echo "Working on ${DISK}" | |
is_partitioned ${DISK} | |
if [ ${?} -ne 0 ]; | |
then | |
echo "${DISK} is not partitioned, partitioning" | |
do_partition ${DISK} | |
fi | |
PARTITION=$(fdisk -l ${DISK}|grep -A 1 Device|tail -n 1|awk '{print $1}') | |
has_filesystem ${PARTITION} | |
if [ ${?} -ne 0 ]; | |
then | |
echo "Creating filesystem on ${PARTITION}." | |
# echo "Press Ctrl-C if you don't want to destroy all data on ${PARTITION}" | |
# sleep 10 | |
mkfs -j -t ext4 ${PARTITION} | |
fi | |
MOUNTPOINT=$(get_next_mountpoint) | |
echo "Next mount point appears to be ${MOUNTPOINT}" | |
[ -d "${MOUNTPOINT}" ] || mkdir -p "${MOUNTPOINT}" | |
read UUID FS_TYPE <<< $(blkid -u filesystem ${PARTITION}|awk -F "[= ]" '{print $3" "$5}'|tr -d "\"") | |
add_to_fstab "${UUID}" "${MOUNTPOINT}" | |
echo "Mounting disk ${PARTITION} on ${MOUNTPOINT}" | |
mount "${MOUNTPOINT}" | |
done | |
} | |
create_striped_volume() | |
{ | |
DISKS=(${@}) | |
if [ "${#DISKS[@]}" -eq 0 ]; | |
then | |
log "No unpartitioned disks without filesystems detected" | |
return | |
fi | |
echo "Disks are ${DISKS[@]}" | |
declare -a PARTITIONS | |
for DISK in "${DISKS[@]}"; | |
do | |
echo "Working on ${DISK}" | |
is_partitioned ${DISK} | |
if [ ${?} -ne 0 ]; | |
then | |
echo "${DISK} is not partitioned, partitioning" | |
do_partition ${DISK} fd | |
fi | |
PARTITION=$(fdisk -l ${DISK}|grep -A 2 Device|tail -n 1|awk '{print $1}') | |
PARTITIONS+=("${PARTITION}") | |
done | |
MDDEVICE=$(get_next_md_device) | |
udevadm control --stop-exec-queue | |
mdadm --create ${MDDEVICE} --level 0 -c 64 --raid-devices ${#PARTITIONS[@]} ${PARTITIONS[*]} | |
udevadm control --start-exec-queue | |
MOUNTPOINT=$(get_next_mountpoint) | |
echo "Next mount point appears to be ${MOUNTPOINT}" | |
[ -d "${MOUNTPOINT}" ] || mkdir -p "${MOUNTPOINT}" | |
#Make a file system on the new device | |
STRIDE=128 #(512kB stripe size) / (4kB block size) | |
PARTITIONSNUM=${#PARTITIONS[@]} | |
STRIPEWIDTH=$((${STRIDE} * ${PARTITIONSNUM})) | |
mkfs.ext4 -b 4096 -E stride=${STRIDE},stripe-width=${STRIPEWIDTH},nodiscard "${MDDEVICE}" | |
read UUID FS_TYPE <<< $(blkid -u filesystem ${MDDEVICE}|awk -F "[= ]" '{print $3" "$5}'|tr -d "\"") | |
add_to_fstab "${UUID}" "${MOUNTPOINT}" | |
mount "${MOUNTPOINT}" | |
} | |
check_mdadm() { | |
dpkg -s mdadm >/dev/null 2>&1 | |
if [ ${?} -ne 0 ]; then | |
(apt-get -y update || (sleep 15; apt-get -y update)) > /dev/null | |
DEBIAN_FRONTEND=noninteractive apt-get -y install mdadm --fix-missing | |
fi | |
} | |
# Create Partitions | |
DISKS=$(scan_for_new_disks) | |
if [ "$RAID_CONFIGURATION" -eq 1 ]; then | |
check_mdadm | |
create_striped_volume "${DISKS[@]}" | |
else | |
scan_partition_format | |
fi |
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