Paste #21029
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | DATA_DIR=~/DATA VOLUME_BACKING_FILE_SIZE=${VOLUME_BACKING_FILE_SIZE:-5130M} VOLUME_GROUP=${VOLUME_GROUP:-stack-volumes} VOLUME_BACKING_FILE=${VOLUME_BACKING_FILE:-$DATA_DIR/${VOLUME_GROUP}-backing-file} if ! sudo vgs $VOLUME_GROUP; then VOLUME_BACKING_FILE=${VOLUME_BACKING_FILE:-$DATA_DIR/${VOLUME_GROUP}-backing-file} # Only create if the file doesn't already exists [[ -f $VOLUME_BACKING_FILE ]] || truncate -s $VOLUME_BACKING_FILE_SIZE $VOLUME_BACKING_FILE DEV=`sudo losetup -f --show $VOLUME_BACKING_FILE` # Only create if the loopback device doesn't contain $VOLUME_GROUP if ! sudo vgs $VOLUME_GROUP; then sudo vgcreate $VOLUME_GROUP $DEV; fi fi lvcreate -L 2G -n "test-vol" $VOLUME_GROUP lvcreate -L 2G --name "test-snap" --snapshot "test-vol" dd count=0 if=/dev/zero of=test-vol count= bs=1M iflag=direct oflag=direct |