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#!/bin/bash
#usage: slave-upgrade.sh <volfile-server:volname> <gfid-file>
# <path-to-gsync-sync-gfid>
#<slave-volfile-server>: a machine on which gluster cli can fetch slave volume info.
# slave-volfile-server defaults to localhost.
#
#<gfid-file>: a file containing paths and their associated gfids
# on master. The paths are relative to master mount point
# (not absolute). An example extract of <gfid-file> can be,
#
# <extract>
# 22114455-57c5-46e9-a783-c40f83a72b09 /dir
# 25772386-3eb8-4550-a802-c3fdc938ca80 /dir/file
# </extract>
function get_bricks()
{
gluster volume info $1 | grep -E 'Brick[0-9]+' | sed -e 's/[^:]*:\(.*\)/\1/g'
}
function cleanup_brick()
{
HOST=$1
BRICK=$2
# TODO: write a C program to receive a list of files and does cleanup on
# them instead of spawning a new setfattr process for each file if
# performance is bad.
ssh $HOST "rm -rf $BRICK/.glusterfs/* && find $BRICK -exec setfattr -x trusted.gfid {} \; 2>/dev/null"
}
function cleanup_slave()
{
VOLUME_NAME=`echo $1 | sed -e 's/.*:\(.*\)/\1/'`
BRICKS=`get_bricks $VOLUME_NAME`
for i in $BRICKS; do
HOST=`echo $i | sed -e 's/\(.*\):.*/\1/'`
BRICK=`echo $i | sed -e 's/.*:\(.*\)/\1/'`
cleanup_brick $HOST $BRICK
done
# Now restart the volume
gluster --mode=script volume stop $VOLUME_NAME;
gluster volume start $VOLUME_NAME;
}
function mount_client()
{
local T; # temporary mount
local i; # inode number
VOLUME_NAME=$2;
GFID_FILE=$3
SYNC_CMD=$4
T=$(mktemp -d);
glusterfs --aux-gfid-mount -s $1 --volfile-id $VOLUME_NAME $T;
i=$(stat -c '%i' $T);
cd $T;
$SYNC_CMD $GFID_FILE
cd -;
umount $T || fatal "could not umount $MASTER from $T";
rmdir $T || warn "rmdir of $T failed";
}
function sync_gfids()
{
SLAVE=$1
GFID_FILE=$2
SYNC_CMD=$3
SLAVE_VOLFILE_SERVER=`echo $SLAVE | sed -e 's/\(.*\):.*/\1/'`
SLAVE_VOLUME_NAME=`echo $SLAVE | sed -e 's/.*:\(.*\)/\1/'`
if [ "x$SLAVE_VOLFILE_SERVER" = "x" ]; then
SLAVE_VOLFILE_SERVER="localhost"
fi
mount_client $SLAVE_VOLFILE_SERVER $SLAVE_VOLUME_NAME $GFID_FILE $SYNC_CMD
}
function upgrade()
{
SLAVE=$1
GFID_FILE=$2
SYNC_CMD=$3
cleanup_slave $SLAVE
sync_gfids $SLAVE $GFID_FILE $SYNC_CMD
}
upgrade "$@"
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