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|
#!/bin/bash
LVM_DEFINED=0
LVM_PREFIX="patchy_snap"
LVM_COUNT=0
VHD_SIZE="1G"
function init_lvm() {
if [ "$1" == "" ]; then
echo "Error: Invalid argument supplied"
return 1
fi
LVM_COUNT=$1
if [ "$2" != "" ]; then
VHD_SIZE=$2
fi
local b
local i
for i in `seq 1 $LVM_COUNT`; do
b="B$i"
if [ "${!b}" = "" ]; then
echo "Error: $b not defined."
echo "Please run launch_cluster before creating lvm"
return 1
fi
eval "L$i=${!b}/${LVM_PREFIX}_mnt"
l="L$i"
mkdir -p ${!l}
if [ $? -ne 0 ]; then
echo "Error: failed to create dir ${!l}"
return 1
fi
eval "VG$i=${LVM_PREFIX}_vg_${i}"
done
LVM_DEFINED=1
return 0
}
function setup_lvm() {
init_lvm $@ || return 1
_setup_lvm
return 0
}
function cleanup_lvm() {
pkill gluster
if [ "$LVM_DEFINED" = "1" ]; then
_cleanup_lvm
fi
_cleanup_lvm_again >/dev/null 2>&1
return 0
}
########################################################
# Private Functions
########################################################
function _setup_lvm() {
local count=$LVM_COUNT
local b
local i
for i in `seq 1 $count`; do
b="B$i"
_create_vhd ${!b} $i
_create_lv ${!b} $i
_mount_lv $i
done
}
function _cleanup_lvm() {
local count=$LVM_COUNT
local b
local i
for i in `seq 1 $count`; do
b="B$i"
_umount_lv $i
_remove_lv $i
_remove_vhd ${!b}
done
}
function _cleanup_lvm_again() {
local file
mount | grep $LVM_PREFIX | awk '{print $3}' | xargs umount -f
/sbin/vgs | grep $LVM_PREFIX | awk '{print $1}' | xargs vgremove -f
find $B0 -name "${LVM_PREFIX}_loop" | xargs losetup -d
find $B0 -name "${LVM_PREFIX}*" | xargs rm -rf
find /run/gluster/snaps -name "*${LVM_PREFIX}*" | xargs rm -rf
for file in `ls /run/gluster/snaps`; do
find /run/gluster/snaps/$file -mmin -2 | xargs rm -rf
done
}
########################################################
########################################################
function _create_vhd() {
local dir=$1
local num=$2
local loop_num=`expr $2 + 8`
fallocate -l${VHD_SIZE} $dir/${LVM_PREFIX}_vhd
mknod -m660 $dir/${LVM_PREFIX}_loop b 7 $loop_num
/sbin/losetup $dir/${LVM_PREFIX}_loop $dir/${LVM_PREFIX}_vhd
}
function _create_lv() {
local dir=$1
local num=$2
local vg="VG$num"
/sbin/pvcreate $dir/${LVM_PREFIX}_loop
/sbin/vgcreate ${!vg} $dir/${LVM_PREFIX}_loop
/sbin/lvcreate -l 100%FREE -T /dev/${!vg}/thinpool
/sbin/lvcreate -V $VHD_SIZE -T /dev/${!vg}/thinpool -n brick_lvm
mkfs.xfs -f /dev/${!vg}/brick_lvm
}
function _mount_lv() {
local num=$1
local vg="VG$num"
local l="L$num"
mount -t xfs -o nouuid /dev/${!vg}/brick_lvm ${!l}
}
function _umount_lv() {
local num=$1
local l="L$num"
umount -f ${!l} 2>/dev/null || true
rmdir ${!l} 2>/dev/null || true
}
function _remove_lv() {
local num=$1
local vg="VG$num"
vgremove -f ${!vg}
}
function _remove_vhd() {
local dir=$1
losetup -d $dir/${LVM_PREFIX}_loop
rm -f $dir/${LVM_PREFIX}_loop
rm -f $dir/${LVM_PREFIX}_vhd
}
########################################################
# Utility Functions
########################################################
function snapshot_exists() {
local snapname=$1
$CLI_1 snapshot list | egrep -q "\b$snapname\b"
return $?
}
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