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Jarrod Johnson 3501f70c37 Merge pull request #247 from Obihoernchen/unsquashfs
Use multi-threaded unsquashfs to extract untethered images
2026-07-28 08:59:38 -04:00

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#!/bin/bash
function test_mgr() {
whost=$1
if [[ "$whost" == *:* ]] && [[ "$whost" != *[* ]] ; then
whost="[$whost]"
fi
if curl -gs https://${whost}/confluent-api/ > /dev/null; then
return 0
fi
return 1
}
function initconfluentscriptstmp() {
if [ -z "$confluentscripttmpdir" ]; then
mkdir -p /opt/confluent/tmpexec
confluentscripttmpdir=$(mktemp -d /opt/confluent/tmpexec/confluentscripts.XXXXXXXXX)
fi
}
function confluentpython() {
if [ -x /usr/libexec/platform-python ]; then
/usr/libexec/platform-python $*
elif [ -x /usr/bin/python3 ]; then
/usr/bin/python3 $*
elif [ -x /usr/bin/python ]; then
/usr/bin/python $*
elif [ -x /usr/bin/python2 ]; then
/usr/bin/python2 $*
fi
}
function set_confluent_vars() {
if [ -z "$nodename" ]; then
nodename=$(grep ^NODENAME: /etc/confluent/confluent.info | awk '{print $2}')
fi
if [[ "$confluent_mgr" == *"%"* ]]; then
confluent_mgr=""
fi
if [ -z "$confluent_mgr" ]; then
confluent_mgr=$(grep ^deploy_server: /etc/confluent/confluent.deploycfg | sed -e 's/[^ ]*: //')
if ! test_mgr $confluent_mgr; then
confluent_mgr=$(grep ^deploy_server_v6: /etc/confluent/confluent.deploycfg | sed -e 's/[^ ]*: //')
if [[ "$confluent_mgr" = *":"* ]]; then
confluent_mgr="[$confluent_mgr]"
fi
fi
if ! test_mgr $confluent_mgr; then
BESTMGRS=$(grep ^EXTMGRINFO: /etc/confluent/confluent.info | grep '|1$' | sed -e 's/EXTMGRINFO: //' -e 's/|.*//')
OKMGRS=$(grep ^EXTMGRINFO: /etc/confluent/confluent.info | grep '|0$' | sed -e 's/EXTMGRINFO: //' -e 's/|.*//')
for confluent_mgr in $BESTMGRS $OKMGRS; do
if [[ $confluent_mgr == *":"* ]]; then
confluent_mgr="[$confluent_mgr]"
fi
if test_mgr $confluent_mgr; then
break
fi
done
fi
fi
if [ -z "$confluent_profile" ]; then
confluent_profile=$(grep ^profile: /etc/confluent/confluent.deploycfg | sed -e 's/[^ ]*: //')
fi
export confluent_profile confluent_mgr nodename
}
fetch_remote() {
curlargs=""
if [ -f /etc/confluent/ca.pem ]; then
curlargs=" --cacert /etc/confluent/ca.pem"
fi
set_confluent_vars
mkdir -p $(dirname $1)
whost=$confluent_mgr
if [[ "$whost" == *:* ]] && [[ "$whost" != *[* ]] ; then
whost="[$whost]"
fi
curl -gf -sS $curlargs https://$whost/confluent-public/os/$confluent_profile/scripts/$1 > $1
if [ $? != 0 ]; then echo $1 failed to download; return 1; fi
}
source_remote_parts() {
unset confluentscripttmpdir
initconfluentscriptstmp
apiclient=/opt/confluent/bin/apiclient
if [ -f /etc/confluent/apiclient ]; then
apiclient=/etc/confluent/apiclient
fi
scriptlist=$(confluentpython $apiclient /confluent-api/self/scriptlist/$1|sed -e 's/^- //')
for script in $scriptlist; do
source_remote $1/$script
done
rm -rf $confluentscripttmpdir
unset confluentscripttmpdir
}
run_remote_parts() {
unset confluentscripttmpdir
initconfluentscriptstmp
apiclient=/opt/confluent/bin/apiclient
if [ -f /etc/confluent/apiclient ]; then
apiclient=/etc/confluent/apiclient
fi
scriptlist=$(confluentpython $apiclient /confluent-api/self/scriptlist/$1|sed -e 's/^- //')
for script in $scriptlist; do
run_remote $1/$script
done
rm -rf $confluentscripttmpdir
unset confluentscripttmpdir
}
set_selinux_context() {
if [ -x /usr/bin/chcon ]; then
/usr/bin/chcon "$1" "$2"
fi
}
source_remote() {
set_confluent_vars
unsettmpdir=0
echo
echo '---------------------------------------------------------------------------'
echo Sourcing $1 from https://$confluent_mgr/confluent-public/os/$confluent_profile/scripts/
initconfluentscriptstmp
echo Sourcing from $confluentscripttmpdir
cd $confluentscripttmpdir
fetch_remote $1
if [ $? != 0 ]; then echo $1 failed to download; return 1; fi
chmod +x $1
cmd=$1
shift
source ./$cmd
cd - > /dev/null
if [ "$unsettmpdir" = 1 ]; then
rm -rf $confluentscripttmpdir
unset confluentscripttmpdir
unsettmpdir=0
fi
rm -rf $confluentscripttmpdir
return $retcode
}
run_remote() {
requestedcmd="'$*'"
unsettmpdir=0
set_confluent_vars
echo
echo '---------------------------------------------------------------------------'
echo Running $requestedcmd from https://$confluent_mgr/confluent-public/os/$confluent_profile/scripts/
if [ -z "$confluentscripttmpdir" ]; then
unsettmpdir=1
fi
initconfluentscriptstmp
echo Executing in $confluentscripttmpdir
cd $confluentscripttmpdir
fetch_remote $1
if [ $? != 0 ]; then echo $requestedcmd failed to download; return 1; fi
chmod +x $1
cmd=$1
set_selinux_context system_u:object_r:bin_t:s0 "$cmd"
shift
./$cmd $*
retcode=$?
if [ $retcode -ne 0 ]; then
echo "$requestedcmd exited with code $retcode"
fi
cd - > /dev/null
if [ "$unsettmpdir" = 1 ]; then
rm -rf $confluentscripttmpdir
unset confluentscripttmpdir
unsettmpdir=0
fi
return $retcode
}
run_remote_python() {
echo
set_confluent_vars
if [ -f /etc/confluent/ca.pem ]; then
curlargs=" --cacert /etc/confluent/ca.pem"
fi
echo '---------------------------------------------------------------------------'
echo Running python script "'$*'" from https://$confluent_mgr/confluent-public/os/$confluent_profile/scripts/
unset confluentscripttmpdir
initconfluentscriptstmp
echo Executing in $confluentscripttmpdir
cd $confluentscripttmpdir
mkdir -p $(dirname $1)
whost=$confluent_mgr
if [[ "$whost" == *:* ]] && [[ "$whost" != *[* ]] ; then
whost="[$whost]"
fi
curl -gf -sS $curlargs https://$whost/confluent-public/os/$confluent_profile/scripts/$1 > $1
if [ $? != 0 ]; then echo "'$*'" failed to download; return 1; fi
confluentpython $*
retcode=$?
echo "'$*' exited with code $retcode"
cd - > /dev/null
rm -rf $confluentscripttmpdir
unset confluentscripttmpdir
return $retcode
}
run_remote_config() {
echo
set_confluent_vars
apiclient=/opt/confluent/bin/apiclient
if [ -f /etc/confluent/apiclient ]; then
apiclient=/etc/confluent/apiclient
fi
echo '---------------------------------------------------------------------------'
echo Requesting to run remote configuration for "'$*'" from $confluent_mgr under profile $confluent_profile
confluentpython $apiclient /confluent-api/self/remoteconfig/"$*" -d {}
confluentpython $apiclient /confluent-api/self/remoteconfig/status -w 204
echo
echo 'Completed remote configuration'
echo '---------------------------------------------------------------------------'
return
}
startlegacyprogress() {
[ -n "$progresspid" ] && return
echo -en "Decrypting and extracting root filesystem: 0%\r"
srcsz=$(du -sk /mnt/remote | awk '{print $1}')
while [ -f /mnt/remoteimg/rootimg.sfs ]; do
dstsz=$(du -sk /sysroot | awk '{print $1}')
pct=$((dstsz * 100 / srcsz))
if [ $pct -gt 99 ]; then
pct=99
fi
echo -en "Decrypting and extracting root filesystem: $pct%\r"
sleep 0.25
done &
progresspid=$!
}
extractmultisquash() {
multisquashrc=1
while read -r _ partsrc partmount; do
normalizedmount=${partmount%/}
[ "$normalizedmount" = /mnt/remote ] || continue
if unsquashfs -force -d /sysroot "$partsrc"; then
multisquashrc=0
fi
break
done < /tmp/mountparts.sh
[ $multisquashrc -eq 0 ] || return 1
while read -r _ partsrc partmount; do
normalizedmount=${partmount%/}
[ "$normalizedmount" = /mnt/remote ] && continue
partdest=/sysroot${normalizedmount#/mnt/remote}
mkdir -p "$partdest"
if ! unsquashfs -force -d "$partdest" "$partsrc"; then
return 1
fi
done < /tmp/mountparts.sh
}
cleanupremotemounts() {
if [ -f /tmp/mountparts.sh ]; then
for partmount in $(awk '{ mounts[NR] = $3 } END { for (idx = NR; idx > 0; idx--) print mounts[idx] }' /tmp/mountparts.sh); do
umount "$partmount"
done
for partdev in $(awk '{ devices[NR] = $NF } END { for (idx = NR; idx > 0; idx--) print devices[idx] }' /tmp/setupmount.sh); do
dmsetup remove "$partdev"
done
else
umount /mnt/remote
fi
}
# Extract an untethered/uncompressed diskless root image into /sysroot and
# tear down the source devices; expects rootimgformat, mountsrc, and loopdev
# from imageboot.sh and the image content mounted under /mnt/remote.
extract_untethered_rootimg() {
extractrc=1
progresspid=
if [ "$rootimgformat" = squashfs ] && command -v unsquashfs > /dev/null 2>&1; then
echo "Decrypting and extracting root filesystem in parallel"
if unsquashfs -force -d /sysroot "$mountsrc"; then
extractrc=0
else
echo "Parallel root filesystem extraction failed, retrying with cp"
fi
elif [ "$rootimgformat" = confluent_multisquash ] && command -v unsquashfs > /dev/null 2>&1; then
echo "Decrypting and extracting multipart root filesystem in parallel"
if extractmultisquash; then
extractrc=0
else
echo "Parallel multipart root filesystem extraction failed, retrying with cp"
fi
fi
if [ $extractrc -ne 0 ]; then
rm -rf /sysroot/* /sysroot/.[!.]* /sysroot/..?*
startlegacyprogress
if cp -a /mnt/remote/. /sysroot/; then
extractrc=0
fi
fi
if [ $extractrc -ne 0 ]; then
if [ -n "$progresspid" ]; then
kill "$progresspid" 2> /dev/null || true
wait "$progresspid" 2> /dev/null || true
progresspid=
fi
echo "Failed to extract the root filesystem"
fi
cleanupremotemounts
if [ -e /dev/mapper/cryptimg ]; then
dmsetup remove cryptimg
fi
losetup -d $loopdev
rm /mnt/remoteimg/rootimg.sfs
umount /mnt/remoteimg
if [ -n "$progresspid" ]; then
wait "$progresspid"
echo -e "Decrypting and extracting root filesystem: 100%"
fi
return $extractrc
}
#If invoked as a command, use the arguments to actually run a function
(return 0 2>/dev/null) || $1 "${@:2}"