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container-storage-setup.sh
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#!/bin/bash
#--
# Copyright 2014-2017 Red Hat, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#++
# Purpose: This script sets up the storage for container runtimes.
# Author: Andy Grimm <[email protected]>
set -e
# container-storage-setup version information
CSS_MAJOR_VERSION="0"
CSS_MINOR_VERSION="1"
CSS_SUBLEVEL="0"
CSS_EXTRA_VERSION=""
CSS_VERSION="${CSS_MAJOR_VERSION}.${CSS_MINOR_VERSION}.${CSS_SUBLEVEL}"
[ -n "$CSS_EXTRA_VERSION" ] && CSS_VERSION="${CSS_VERSION}-${CSS_EXTRA_VERSION}"
# This section reads the config file $INPUTFILE
# Read man page for a description of currently supported options:
# 'man container-storage-setup'
DOCKER_ROOT_LV_NAME="docker-root-lv"
DOCKER_ROOT_DIR="/var/lib/docker"
DOCKER_METADATA_DIR="/var/lib/docker"
DOCKER_ROOT_VOLUME_SIZE=40%FREE
STORAGE_IN_FILE="/etc/sysconfig/docker-storage-setup"
STORAGE_OUT_FILE="/etc/sysconfig/docker-storage"
STORAGE_DRIVERS="devicemapper overlay overlay2"
PIPE1=/run/css-$$-fifo1
PIPE2=/run/css-$$-fifo2
TEMPDIR=$(mktemp --tmpdir -d)
# DEVS can have device names without absolute path. Convert these to absolute
# paths and save in ABS_DEVS and use in rest of the code.
DEVS_ABS=""
# Will have currently configured storage options in ${STORAGE_OUT_FILE}
CURRENT_STORAGE_OPTIONS=""
STORAGE_OPTIONS="STORAGE_OPTIONS"
get_docker_version() {
local version
# docker version command exits with error as daemon is not running at this
# point of time. So continue despite the error.
version=`docker version --format='{{.Client.Version}}' 2>/dev/null` || true
echo $version
}
get_deferred_removal_string() {
local version major minor
if ! version=$(get_docker_version);then
return 0
fi
[ -z "$version" ] && return 0
major=$(echo $version | cut -d "." -f1)
minor=$(echo $version | cut -d "." -f2)
[ -z "$major" ] && return 0
[ -z "$minor" ] && return 0
# docker 1.7 onwards supports deferred device removal. Enable it.
if [ $major -gt 1 ] || ([ $major -eq 1 ] && [ $minor -ge 7 ]);then
echo "--storage-opt dm.use_deferred_removal=true"
fi
}
get_deferred_deletion_string() {
local version major minor
if ! version=$(get_docker_version);then
return 0
fi
[ -z "$version" ] && return 0
major=$(echo $version | cut -d "." -f1)
minor=$(echo $version | cut -d "." -f2)
[ -z "$major" ] && return 0
[ -z "$minor" ] && return 0
if should_enable_deferred_deletion $major $minor; then
echo "--storage-opt dm.use_deferred_deletion=true"
fi
}
should_enable_deferred_deletion() {
# docker 1.9 onwards supports deferred device deletion. Enable it.
local major=$1
local minor=$2
if [ $major -lt 1 ] || ([ $major -eq 1 ] && [ $minor -lt 9 ]);then
return 1
fi
if platform_supports_deferred_deletion; then
return 0
fi
return 1
}
platform_supports_deferred_deletion() {
local deferred_deletion_supported=1
trap cleanup_pipes EXIT
local child_exec="$SRCDIR/css-child-read-write.sh"
[ ! -x "$child_exec" ] && child_exec="/usr/lib/container-storage-setup/css-child-read-write"
if [ ! -x "$child_exec" ];then
return 1
fi
mkfifo $PIPE1
mkfifo $PIPE2
unshare -m ${child_exec} $PIPE1 $PIPE2 "$TEMPDIR" &
read -t 10 n <>$PIPE1
if [ "$n" != "start" ];then
return 1
fi
rmdir $TEMPDIR > /dev/null 2>&1
deferred_deletion_supported=$?
echo "finish" > $PIPE2
return $deferred_deletion_supported
}
cleanup_pipes(){
rm -f $PIPE1
rm -f $PIPE2
rmdir $TEMPDIR 2>/dev/null
}
extra_options_has_dm_fs() {
local option
for option in ${EXTRA_STORAGE_OPTIONS}; do
if grep -q "dm.fs=" <<< $option; then
return 0
fi
done
return 1
}
# Wait for a device for certain time interval. If device is found 0 is
# returned otherwise 1.
wait_for_dev() {
local devpath=$1
local timeout=$DEVICE_WAIT_TIMEOUT
if [ -b "$devpath" ];then
Info "Device node $devpath exists."
return 0
fi
if [ -z "$DEVICE_WAIT_TIMEOUT" ] || [ "$DEVICE_WAIT_TIMEOUT" == "0" ];then
Info "Not waiting for device $devpath as DEVICE_WAIT_TIMEOUT=${DEVICE_WAIT_TIMEOUT}."
return 0
fi
while [ $timeout -gt 0 ]; do
Info "Waiting for device $devpath to be available. Wait time remaining is $timeout seconds"
if [ $timeout -le 5 ];then
sleep $timeout
else
sleep 5
fi
timeout=$((timeout-5))
if [ -b "$devpath" ]; then
Info "Device node $devpath exists."
return 0
fi
done
Info "Timed out waiting for device $devpath"
return 1
}
get_devicemapper_config_options() {
local storage_options
local dm_fs="--storage-opt dm.fs=xfs"
# docker expects device mapper device and not lvm device. Do the conversion.
eval $( lvs --nameprefixes --noheadings -o lv_name,kernel_major,kernel_minor $VG | while read line; do
eval $line
if [ "$LVM2_LV_NAME" = "$CONTAINER_THINPOOL" ]; then
echo POOL_DEVICE_PATH=/dev/mapper/$( cat /sys/dev/block/${LVM2_LV_KERNEL_MAJOR}:${LVM2_LV_KERNEL_MINOR}/dm/name )
fi
done )
if extra_options_has_dm_fs; then
# dm.fs option defined in ${EXTRA_STORAGE_OPTIONS}
dm_fs=""
fi
storage_options="${STORAGE_OPTIONS}=\"--storage-driver devicemapper ${dm_fs} --storage-opt dm.thinpooldev=$POOL_DEVICE_PATH $(get_deferred_removal_string) $(get_deferred_deletion_string) ${EXTRA_STORAGE_OPTIONS}\""
echo $storage_options
}
get_config_options() {
if [ "$1" == "devicemapper" ]; then
get_devicemapper_config_options
return $?
fi
echo "${STORAGE_OPTIONS}=\"--storage-driver $1 ${EXTRA_STORAGE_OPTIONS}\""
return 0
}
write_storage_config_file () {
local storage_options
if ! storage_options=$(get_config_options $STORAGE_DRIVER); then
return 1
fi
cat <<EOF > ${STORAGE_OUT_FILE}.tmp
$storage_options
EOF
mv -Z ${STORAGE_OUT_FILE}.tmp ${STORAGE_OUT_FILE}
}
convert_size_in_bytes() {
local size=$1 prefix suffix
# if it is all numeric, it is valid as by default it will be MiB.
if [[ $size =~ ^[[:digit:]]+$ ]]; then
echo $(($size*1024*1024))
return 0
fi
# supprt G, G[bB] or Gi[bB] inputs.
prefix=${size%[bBsSkKmMgGtTpPeE]i[bB]}
prefix=${prefix%[bBsSkKmMgGtTpPeE][bB]}
prefix=${prefix%[bBsSkKmMgGtTpPeE]}
# if prefix is not all numeric now, it is an error.
if ! [[ $prefix =~ ^[[:digit:]]+$ ]]; then
return 1
fi
suffix=${data_size#$prefix}
case $suffix in
b*|B*) echo $prefix;;
s*|S*) echo $(($prefix*512));;
k*|K*) echo $(($prefix*2**10));;
m*|M*) echo $(($prefix*2**20));;
g*|G*) echo $(($prefix*2**30));;
t*|T*) echo $(($prefix*2**40));;
p*|P*) echo $(($prefix*2**50));;
e*|E*) echo $(($prefix*2**60));;
*) return 1;;
esac
}
data_size_in_bytes() {
local data_size=$1
local bytes vg_size free_space percent
# -L compatible syntax
if [[ $DATA_SIZE != *%* ]]; then
bytes=`convert_size_in_bytes $data_size`
[ $? -ne 0 ] && return 1
# If integer overflow took place, value is too large to handle.
if [ $bytes -lt 0 ];then
Error "DATA_SIZE=$data_size is too large to handle."
return 1
fi
echo $bytes
return 0
fi
if [[ $DATA_SIZE == *%FREE ]];then
free_space=$(vgs --noheadings --nosuffix --units b -o vg_free $VG)
percent=${DATA_SIZE%\%FREE}
echo $((percent*free_space/100))
return 0
fi
if [[ $DATA_SIZE == *%VG ]];then
vg_size=$(vgs --noheadings --nosuffix --units b -o vg_size $VG)
percent=${DATA_SIZE%\%VG}
echo $((percent*vg_size/100))
fi
return 0
}
check_min_data_size_condition() {
local min_data_size_bytes data_size_bytes free_space
[ -z $MIN_DATA_SIZE ] && return 0
if ! check_numeric_size_syntax $MIN_DATA_SIZE; then
Fatal "MIN_DATA_SIZE value $MIN_DATA_SIZE is invalid."
fi
if ! min_data_size_bytes=$(convert_size_in_bytes $MIN_DATA_SIZE);then
Fatal "Failed to convert MIN_DATA_SIZE to bytes"
fi
# If integer overflow took place, value is too large to handle.
if [ $min_data_size_bytes -lt 0 ];then
Fatal "MIN_DATA_SIZE=$MIN_DATA_SIZE is too large to handle."
fi
free_space=$(vgs --noheadings --nosuffix --units b -o vg_free $VG)
if [ $free_space -lt $min_data_size_bytes ];then
Fatal "There is not enough free space in volume group $VG to create data volume of size MIN_DATA_SIZE=${MIN_DATA_SIZE}."
fi
if ! data_size_bytes=$(data_size_in_bytes $DATA_SIZE);then
Fatal "Failed to convert desired data size to bytes"
fi
if [ $data_size_bytes -lt $min_data_size_bytes ]; then
# Increasing DATA_SIZE to meet minimum data size requirements.
Info "DATA_SIZE=${DATA_SIZE} is smaller than MIN_DATA_SIZE=${MIN_DATA_SIZE}. Will create data volume of size specified by MIN_DATA_SIZE."
DATA_SIZE=$MIN_DATA_SIZE
fi
}
create_lvm_thin_pool () {
if [ "$STORAGE_DRIVER" == "devicemapper" ] && [ -z "$CONTAINER_THINPOOL" ];then
Fatal "CONTAINER_THINPOOL must be defined for the devicemapper storage driver."
fi
if [ -z "$DEVS_ABS" ] && [ -z "$VG_EXISTS" ]; then
Fatal "Specified volume group $VG does not exist, and no devices were specified"
fi
if [ ! -n "$DATA_SIZE" ]; then
Fatal "DATA_SIZE not specified."
fi
if ! check_data_size_syntax $DATA_SIZE; then
Fatal "DATA_SIZE value $DATA_SIZE is invalid."
fi
check_min_data_size_condition
# Calculate size of metadata lv. Reserve 0.1% of the free space in the VG
# for docker metadata.
VG_SIZE=$(vgs --noheadings --nosuffix --units s -o vg_size $VG)
META_SIZE=$(( $VG_SIZE / 1000 + 1 ))
if [ -z "$META_SIZE" ];then
Fatal "Failed to calculate metadata volume size."
fi
if [ -n "$CHUNK_SIZE" ]; then
CHUNK_SIZE_ARG="-c $CHUNK_SIZE"
fi
if [[ $DATA_SIZE == *%* ]]; then
DATA_SIZE_ARG="-l $DATA_SIZE"
else
DATA_SIZE_ARG="-L $DATA_SIZE"
fi
lvcreate -y --type thin-pool --zero n $CHUNK_SIZE_ARG --poolmetadatasize ${META_SIZE}s $DATA_SIZE_ARG -n $CONTAINER_THINPOOL $VG
}
get_configured_thin_pool() {
local options tpool opt
options=$CURRENT_STORAGE_OPTIONS
[ -z "$options" ] && return 0
# This assumes that thin pool is specified as dm.thinpooldev=foo. There
# are no spaces in between.
for opt in $options; do
if [[ $opt =~ dm.thinpooldev* ]];then
tpool=${opt#*=}
echo "$tpool"
return 0
fi
done
}
check_docker_storage_metadata() {
local docker_devmapper_meta_dir="$DOCKER_METADATA_DIR/devicemapper/metadata/"
[ ! -d "$docker_devmapper_meta_dir" ] && return 0
# Docker seems to be already using devicemapper storage driver. Error out.
Error "Docker has been previously configured for use with devicemapper graph driver. Not creating a new thin pool as existing docker metadata will fail to work with it. Manual cleanup is required before this will succeed."
Info "Docker state can be reset by stopping docker and by removing ${DOCKER_METADATA_DIR} directory. This will destroy existing docker images and containers and all the docker metadata."
exit 1
}
systemd_escaped_filename () {
local escaped_path filename path=$1
escaped_path=$(echo ${path}|sed 's|-|\\x2d|g')
filename=$(echo ${escaped_path}.mount|sed 's|/|-|g' | cut -b 2-)
echo $filename
}
#
# In the past we created a systemd mount target file, we no longer
# use it, but if one pre-existed we still need to handle it.
#
remove_systemd_mount_target () {
local mp=$1
local filename=$(systemd_escaped_filename $mp)
if [ -f /etc/systemd/system/$filename ];then
systemctl disable $filename >/dev/null 2>&1
systemctl stop $filename >/dev/null 2>&1
systemctl daemon-reload
rm -f /etc/systemd/system/$filename >/dev/null 2>&1
fi
}
reset_extra_volume () {
local mp filename
local lv_name=$1
local mount_dir=$2
if extra_volume_exists $lv_name; then
mp=$(extra_lv_mountpoint $lv_name $mount_dir)
if [ -n "$mp" ];then
if ! umount $mp >/dev/null 2>&1; then
Fatal "Failed to unmount $mp"
fi
fi
lvchange -an $VG/${lv_name}
lvremove $VG/${lv_name}
else
return 0
fi
# If the user has manually unmounted mount directory, mountpoint (mp)
# will be empty. Extract ${mp} from $(mount_dir) in that case.
if [ -z "$mp" ];then
mp=${mount_dir}
fi
remove_systemd_mount_target $mp
}
reset_lvm_thin_pool () {
local thinpool_name=${CONTAINER_THINPOOL:-docker-pool}
if lvm_pool_exists $thinpool_name; then
lvchange -an $VG/${thinpool_name}
lvremove $VG/${thinpool_name}
fi
}
setup_lvm_thin_pool () {
local tpool
# Check if a thin pool is already configured in /etc/sysconfig/docker-storage.
# If yes, wait for that thin pool to come up.
tpool=`get_configured_thin_pool`
local thinpool_name=${CONTAINER_THINPOOL:-docker-pool}
if [ -n "$tpool" ]; then
local escaped_pool_lv_name=`echo $thinpool_name | sed 's/-/--/g'`
Info "Found an already configured thin pool $tpool in ${STORAGE_OUT_FILE}"
# css generated thin pool device name starts with /dev/mapper/ and
# ends with $thinpool_name
if [[ "$tpool" != /dev/mapper/*${escaped_pool_lv_name} ]];then
Fatal "Thin pool ${tpool} does not seem to be managed by container-storage-setup. Exiting."
fi
if ! wait_for_dev "$tpool"; then
Fatal "Already configured thin pool $tpool is not available. If thin pool exists and is taking longer to activate, set DEVICE_WAIT_TIMEOUT to a higher value and retry. If thin pool does not exist any more, remove ${STORAGE_OUT_FILE} and retry"
fi
fi
# At this point of time, a volume group should exist for lvm thin pool
# operations to succeed. Make that check and fail if that's not the case.
if ! vg_exists "$VG";then
Fatal "No valid volume group found. Exiting."
else
VG_EXISTS=1
fi
if ! lvm_pool_exists $thinpool_name; then
check_docker_storage_metadata
create_lvm_thin_pool
write_storage_config_file
else
# At this point /etc/sysconfig/docker-storage file should exist. If user
# deleted this file accidently without deleting thin pool, recreate it.
if [ ! -f "${STORAGE_OUT_FILE}" ];then
Info "${STORAGE_OUT_FILE} file is missing. Recreating it."
write_storage_config_file
fi
fi
# Enable or disable automatic pool extension
if [ "$AUTO_EXTEND_POOL" == "yes" ];then
enable_auto_pool_extension ${VG} ${thinpool_name}
else
disable_auto_pool_extension ${VG} ${thinpool_name}
fi
}
lvm_pool_exists() {
local lv_data
local lvname lv lvsize
local thinpool_name=$1
if [ -z "$thinpool_name" ]; then
Fatal "Thin pool name must be specified."
fi
lv_data=$( lvs --noheadings -o lv_name,lv_attr --separator , $VG | sed -e 's/^ *//')
SAVEDIFS=$IFS
for lv in $lv_data; do
IFS=,
read lvname lvattr <<< "$lv"
# pool logical volume has "t" as first character in its attributes
if [ "$lvname" == "$thinpool_name" ] && [[ $lvattr == t* ]]; then
IFS=$SAVEDIFS
return 0
fi
done
IFS=$SAVEDIFS
return 1
}
# If a ${STORAGE_OUT_FILE} file is present and if it contains
# dm.datadev or dm.metadatadev entries, that means we have used old mode
# in the past.
is_old_data_meta_mode() {
if [ ! -f "${STORAGE_OUT_FILE}" ];then
return 1
fi
if ! grep -e "^${STORAGE_OPTIONS}=.*dm\.datadev" -e "^${STORAGE_OPTIONS}=.*dm\.metadatadev" ${STORAGE_OUT_FILE} > /dev/null 2>&1;then
return 1
fi
return 0
}
grow_root_pvs() {
# If root is not in a volume group, then there are no root pvs and nothing
# to do.
[ -z "$ROOT_PVS" ] && return 0
# Grow root pvs only if user asked for it through config file.
[ "$GROWPART" != "true" ] && return
if [ ! -x "/usr/bin/growpart" ];then
Error "GROWPART=true is specified and /usr/bin/growpart executable is not available. Install /usr/bin/growpart and try again."
return 1
fi
# Note that growpart is only variable here because we may someday support
# using separate partitions on the same disk. Today we fail early in that
# case. Also note that the way we are doing this, it should support LVM
# RAID for the root device. In the mirrored or striped case, we are growing
# partitions on all disks, so as long as they match, growing the LV should
# also work.
for pv in $ROOT_PVS; do
# Split device & partition. Ick.
growpart $( echo $pv | sed -r 's/([^0-9]*)([0-9]+)/\1 \2/' ) || true
pvresize $pv
done
}
grow_root_lv_fs() {
if [ -n "$ROOT_SIZE" ]; then
# TODO: Error checking if specified size is <= current size
lvextend -r -L $ROOT_SIZE $ROOT_DEV || true
fi
}
# Determines if a device is already added in a volume group as pv. Returns
# 0 on success.
is_dev_part_of_vg() {
local dev=$1
local vg=$2
if ! pv_name=$(pvs --noheadings -o pv_name -S pv_name=$dev,vg_name=$vg); then
Fatal "Error running command pvs. Exiting."
fi
[ -z "$pv_name" ] && return 1
pv_name=`echo $pv_name | tr -d '[ ]'`
[ "$pv_name" == "$dev" ] && return 0
return 1
}
# Check if passed in vg exists. Returns 0 if volume group exists.
vg_exists() {
local check_vg=$1
for vg_name in $(vgs --noheadings -o vg_name); do
if [ "$vg_name" == "$VG" ]; then
return 0
fi
done
return 1
}
is_block_dev_partition() {
local bdev=$1
if ! disktype=$(lsblk -n --nodeps --output type ${bdev}); then
Fatal "Failed to run lsblk on device $bdev"
fi
if [ "$disktype" == "part" ];then
return 0
fi
return 1
}
check_wipe_block_dev_sig() {
local bdev=$1
local sig
if ! sig=$(wipefs -p $bdev); then
Fatal "Failed to check signatures on device $bdev"
fi
[ "$sig" == "" ] && return 0
if [ "$WIPE_SIGNATURES" == "true" ];then
Info "Wipe Signatures is set to true. Any signatures on $bdev will be wiped."
if ! wipefs -a $bdev; then
Fatal "Failed to wipe signatures on device $bdev"
fi
return 0
fi
while IFS=, read offset uuid label type; do
[ "$offset" == "# offset" ] && continue
Fatal "Found $type signature on device ${bdev} at offset ${offset}. Wipe signatures using wipefs or use WIPE_SIGNATURES=true and retry."
done <<< "$sig"
}
# Make sure passed in devices are valid block devies. Also make sure they
# are not partitions. Names which are of the form "sdb", convert them to
# their absolute path for processing in rest of the script.
canonicalize_block_devs() {
local devs=$1 dev
local devs_abs dev_abs
local dest_dev
for dev in ${devs}; do
# If the device name is a symlink, follow it and use the target
if [ -h "$dev" ];then
if ! dest_dev=$(readlink -e $dev);then
Fatal "Failed to resolve symbolic link $dev"
fi
dev=$dest_dev
fi
# Looks like we allowed just device name (sda) as valid input. In
# such cases /dev/$dev should be a valid block device.
dev_abs=$dev
[ ! -b "$dev" ] && dev_abs="/dev/$dev"
[ ! -b "$dev_abs" ] && Fatal "$dev_abs is not a valid block device."
if is_block_dev_partition ${dev_abs}; then
Fatal "Partition specification unsupported at this time."
fi
devs_abs="$devs_abs $dev_abs"
done
# Return list of devices to caller.
echo "$devs_abs"
}
# Scans all the disks listed in DEVS= and returns the disks which are not
# already part of volume group and are new and require further processing.
scan_disks() {
local new_disks=""
for dev in $DEVS_ABS; do
local basename=$(basename $dev)
local p
if is_dev_part_of_vg ${dev}1 $VG; then
Info "Device ${dev} is already partitioned and is part of volume group $VG"
continue
fi
# If signatures are being overridden, then simply return the disk as new
# disk. Even if it is partitioned, partition signatures will be wiped.
if [ "$WIPE_SIGNATURES" == "true" ];then
new_disks="$new_disks $dev"
continue
fi
# If device does not have partitions, it is a new disk requiring processing.
p=$(awk "\$4 ~ /${basename}./ {print \$4}" /proc/partitions)
if [[ -z "$p" ]]; then
new_disks="$dev $new_disks"
continue
fi
Fatal "Device $dev is already partitioned and cannot be added to volume group $VG"
done
echo $new_disks
}
create_partition_sfdisk(){
local dev="$1" size label="$2" type
# Use a single partition of a whole device
# TODO:
# * Consider unpartitioned volumes
# * Error handling when partition(s) already exist
# * Deal with loop/nbd device names. See growpart code
size=$(( $( awk "\$4 ~ /"$( basename $dev )"/ { print \$3 }" /proc/partitions ) * 2 - 2048 ))
# if parted is not present, and this version of sfdisk
# does not support GPT then we are limited to 2TB
if [ $label = "gpt" ]; then
if $(sfdisk --help|grep gpt >/dev/null) ; then
label="label: gpt"
type=""
size=$(( $size - 34 )) #34 is the first usable sector for GPT labels
else
Info "Your version of sfdisk does not support GPT labels. Will use MBR instead but partition size will be limited to 2TB"
label=""
type=", Id=8e"
# 2TB in sectors - 2048
if [ $size -gt 4294965248 ]; then size=4294965248; fi
fi
elif [ $label = "msdos" ]; then
label=""
fi
cat <<EOF | sfdisk $dev
unit: sectors
$label
${dev}1 : start= 2048, size= ${size}${type}
EOF
}
create_partition_parted(){
local dev="$1" label="$2"
parted $dev --script mklabel $label mkpart primary 0% 100% set 1 lvm on
}
create_partition() {
local dev="$1" size label
#Determine partition size. If larger than 2TB use GPT instead
size=$( awk "\$4 ~ /"$( basename $dev )"/ { print \$3 }" /proc/partitions )
if [ $size -gt 2147483648 ]; then
label="gpt"
else
label="msdos"
fi
if [ -x "/usr/sbin/parted" ]; then
create_partition_parted $dev $label
else
create_partition_sfdisk $dev $label
fi
# Sometimes on slow storage it takes a while for partition device to
# become available. Wait for device node to show up.
if ! udevadm settle;then
Fatal "udevadm settle after partition creation failed. Exiting."
fi
if ! wait_for_dev ${dev}1; then
Fatal "Partition device ${dev}1 is not available"
fi
}
create_disk_partitions() {
local devs="$1"
for dev in $devs; do
create_partition $dev
# By now we have ownership of disk and we have checked there are no
# signatures on disk or signatures should be wiped. Don't care
# about any signatures found in the middle of disk after creating
# partition and wipe signatures if any are found.
if ! wipefs -a ${dev}1; then
Fatal "Failed to wipe signatures on device ${dev}1"
fi
pvcreate ${dev}1
PVS="$PVS ${dev}1"
done
}
create_extend_volume_group() {
if [ -z "$VG_EXISTS" ]; then
vgcreate $VG $PVS
VG_EXISTS=1
else
# TODO:
# * Error handling when PV is already part of a VG
vgextend $VG $PVS
fi
}
# Auto extension logic. Create a profile for pool and attach that profile
# the pool volume.
enable_auto_pool_extension() {
local volume_group=$1
local pool_volume=$2
local profileName="${volume_group}--${pool_volume}-extend"
local profileFile="${profileName}.profile"
local profileDir
local tmpFile=`mktemp -p /run -t tmp.XXXXX`
profileDir=$(lvm dumpconfig | grep "profile_dir" | cut -d "=" -f2 | sed 's/"//g')
[ -n "$profileDir" ] || return 1
if [ ! -n "$POOL_AUTOEXTEND_THRESHOLD" ];then
Error "POOL_AUTOEXTEND_THRESHOLD not specified"
return 1
fi
if [ ! -n "$POOL_AUTOEXTEND_PERCENT" ];then
Error "POOL_AUTOEXTEND_PERCENT not specified"
return 1
fi
cat <<EOF > $tmpFile
activation {
thin_pool_autoextend_threshold=${POOL_AUTOEXTEND_THRESHOLD}
thin_pool_autoextend_percent=${POOL_AUTOEXTEND_PERCENT}
}
EOF
mv -Z $tmpFile ${profileDir}/${profileFile}
lvchange --metadataprofile ${profileName} ${volume_group}/${pool_volume}
}
disable_auto_pool_extension() {
local volume_group=$1
local pool_volume=$2
local profileName="${volume_group}--${pool_volume}-extend"
local profileFile="${profileName}.profile"
local profileDir
profileDir=$(lvm dumpconfig | grep "profile_dir" | cut -d "=" -f2 | sed 's/"//g')
[ -n "$profileDir" ] || return 1
lvchange --detachprofile ${volume_group}/${pool_volume}
rm -f ${profileDir}/${profileFile}
}
# Gets the current DOCKER_STORAGE_OPTIONS= string.
get_docker_storage_options() {
local options
if [ ! -f "${STORAGE_OUT_FILE}" ];then
return 0
fi
if options=$(grep -e "^DOCKER_STORAGE_OPTIONS=" ${STORAGE_OUT_FILE} | sed 's/DOCKER_STORAGE_OPTIONS=//' | sed 's/^ *//' | sed 's/^"//' | sed 's/"$//');then
echo $options
return 0
fi
return 1
}
is_valid_storage_driver() {
local driver=$1 d
for d in $STORAGE_DRIVERS;do
[ "$driver" == "$d" ] && return 0
done
return 1
}
# Gets the existing storage driver configured in /etc/sysconfig/docker-storage
get_existing_storage_driver() {
local options driver
options=$CURRENT_STORAGE_OPTIONS
[ -z "$options" ] && return 0
# Check if -storage-driver <driver> is there.
if ! driver=$(echo $options | sed -n 's/.*\(--storage-driver [ ]*[a-z0-9]*\).*/\1/p' | sed 's/--storage-driver *//');then
return 1
fi
# If pattern does not match then driver == options.
if [ -n "$driver" ] && [ ! "$driver" == "$options" ];then
echo $driver
return 0
fi
# Check if -s <driver> is there.
if ! driver=$(echo $options | sed -n 's/.*\(-s [ ]*[a-z][0-9]*\).*/\1/p' | sed 's/-s *//');then
return 1
fi
# If pattern does not match then driver == options.
if [ -n "$driver" ] && [ ! "$driver" == "$options" ];then
echo $driver
return 0
fi
# We shipped some versions where we did not specify -s devicemapper.
# If dm.thinpooldev= is present driver is devicemapper.
if echo $options | grep -q -e "--storage-opt dm.thinpooldev=";then
echo "devicemapper"
return 0
fi
#Failed to determine existing storage driver.
return 1
}
extra_volume_exists() {
local lv_name=$1
lvs $VG/$lv_name > /dev/null 2>&1 && return 0
return 1
}
# This returns the mountpoint of $1
extra_lv_mountpoint() {
local mounts
local lv_name=$1
local mount_dir=$2
mounts=$(findmnt -n -o TARGET --source /dev/$VG/$lv_name | grep $mount_dir)
echo $mounts
}
mount_extra_volume() {
local lv_name=$1
local mount_dir=$2
remove_systemd_mount_target $mount_dir
mounts=$(extra_lv_mountpoint $lv_name $mount_dir)
if [ -z "$mounts" ]; then
mount /dev/$VG/$lv_name $mount_dir
fi
}
# Create a logical volume of size specified by first argument. Name of the
# volume is specified using second argument.
create_lv() {
local data_size=$1
local data_lv_name=$2
# TODO: Error handling when data_size > available space.
if [[ $data_size == *%* ]]; then
lvcreate -y -l $data_size -n $data_lv_name $VG || return 1
else
lvcreate -y -L $data_size -n $data_lv_name $VG || return 1
fi
return 0
}
setup_extra_volume() {
local lv_name=$1
local mount_dir=$2
local lv_size=$3
if ! create_lv $lv_size $lv_name; then
Fatal "Failed to create volume $lv_name of size ${lv_size}."
fi
if ! mkfs -t xfs /dev/$VG/$lv_name > /dev/null; then
Fatal "Failed to create filesystem on /dev/$VG/${lv_name}."
fi
if ! mount_extra_volume $lv_name $mount_dir; then
Fatal "Failed to mount volume ${lv_name} on ${mount_dir}"
fi
# setup right selinux label first time fs is created. Mount operation
# changes the label of directory to reflect the label on root inode
# of mounted fs.
if ! restore_selinux_context $mount_dir; then
return 1
fi
}
setup_extra_lv_fs() {
[ -z "$RESOLVED_MOUNT_DIR_PATH" ] && return 0
if ! setup_extra_dir $RESOLVED_MOUNT_DIR_PATH; then
return 1
fi
if extra_volume_exists $CONTAINER_ROOT_LV_NAME; then
if ! mount_extra_volume $CONTAINER_ROOT_LV_NAME $RESOLVED_MOUNT_DIR_PATH; then
Fatal "Failed to mount volume $CONTAINER_ROOT_LV_NAME on $RESOLVED_MOUNT_DIR_PATH"
fi