mirror of
https://github.com/xcat2/confluent.git
synced 2026-11-12 11:06:17 +00:00
Markus Hilger
dc909e6f0b
With a tethered root (and on EL8 always), the initramfs writes the overlay upper layer before the SELinux policy is loaded, so those files are unlabeled_t. On a captured enforcing image sshd-keygen then cannot search / and the node comes up without sshd. Label exactly the upper layer paths with matchpathcon and chcon. setfiles would recurse into the merged tree and restorecon is a no-op before policy load. Built images have SELinux disabled and skip this.
188 lines
8.4 KiB
Bash
188 lines
8.4 KiB
Bash
. /lib/dracut-lib.sh
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confluent_whost=$confluent_mgr
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if [[ "$confluent_whost" == *:* ]] && [[ "$confluent_whost" != "["* ]]; then
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confluent_whost="[$confluent_mgr]"
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fi
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mkdir -p /mnt/remoteimg /mnt/remote /mnt/overlay
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TETHERED=0
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if [ "untethered" = "$(getarg confluent_imagemethod)" ]; then
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mount -t tmpfs untethered /mnt/remoteimg
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while ! curl -f https://$confluent_whost/confluent-public/os/$confluent_profile/rootimg.sfs -o /mnt/remoteimg/rootimg.sfs; do
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echo "Failed downloading image, retrying..."
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sleep $((RANDOM%3)).$((RANDOM))
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done
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else
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TETHERED=1
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confluent_urls="$confluent_urls https://$confluent_whost/confluent-public/os/$confluent_profile/rootimg.sfs"
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/opt/confluent/bin/urlmount $confluent_urls /mnt/remoteimg
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fi
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/opt/confluent/bin/confluent_imginfo /mnt/remoteimg/rootimg.sfs > /tmp/rootimg.info
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loopdev=$(losetup -f)
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export mountsrc=$loopdev
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losetup -r $loopdev /mnt/remoteimg/rootimg.sfs
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if grep '^Format: confluent_crypted' /tmp/rootimg.info > /dev/null; then
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while ! curl -sf -H "CONFLUENT_NODENAME: $nodename" -H "CONFLUENT_APIKEY: $(cat /etc/confluent/confluent.apikey)" https://$confluent_whost/confluent-api/self/profileprivate/pending/rootimg.key > /tmp/rootimg.key; do
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echo "Unable to retrieve private key from $confluent_mgr (verify that confluent can access /var/lib/confluent/private/os/$confluent_profile/pending/rootimg.key)"
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sleep 1
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done
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cipher=$(head -n 1 /tmp/rootimg.key)
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key=$(tail -n 1 /tmp/rootimg.key)
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len=$(wc -c /mnt/remoteimg/rootimg.sfs | awk '{print $1}')
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len=$(((len-4096)/512))
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dmsetup create cryptimg --table "0 $len crypt $cipher $key 0 $loopdev 8"
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/opt/confluent/bin/confluent_imginfo /dev/mapper/cryptimg > /tmp/rootimg.info
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mountsrc=/dev/mapper/cryptimg
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fi
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if grep '^Format: squashfs' /tmp/rootimg.info > /dev/null; then
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mount -o ro $mountsrc /mnt/remote
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elif grep '^Format: confluent_multisquash' /tmp/rootimg.info; then
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tail -n +3 /tmp/rootimg.info | awk '{gsub("/", "_"); print "echo 0 " $4 " linear '$mountsrc' " $3 " | dmsetup create mproot" $7}' > /tmp/setupmount.sh
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. /tmp/setupmount.sh
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cat /tmp/setupmount.sh |awk '{printf "mount /dev/mapper/"$NF" "; sub("mproot", ""); gsub("_", "/"); print "/mnt/remote"$NF}' > /tmp/mountparts.sh
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. /tmp/mountparts.sh
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fi
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#mount -t tmpfs overlay /mnt/overlay
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modprobe zram
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memtot=$(grep ^MemTotal: /proc/meminfo|awk '{print $2}')
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memtot=$((memtot/2))$(grep ^MemTotal: /proc/meminfo | awk '{print $3'})
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echo $memtot > /sys/block/zram0/disksize
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mkfs.xfs /dev/zram0 > /dev/null
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mount -o discard /dev/zram0 /mnt/overlay
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if [ ! -f /tmp/mountparts.sh ]; then
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mkdir -p /mnt/overlay/upper /mnt/overlay/work
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mount -t overlay -o upperdir=/mnt/overlay/upper,workdir=/mnt/overlay/work,lowerdir=/mnt/remote disklessroot /sysroot
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else
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for srcmount in $(cat /tmp/mountparts.sh | awk '{print $3}'); do
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mkdir -p /mnt/overlay${srcmount}/upper /mnt/overlay${srcmount}/work
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mount -t overlay -o upperdir=/mnt/overlay${srcmount}/upper,workdir=/mnt/overlay${srcmount}/work,lowerdir=${srcmount} disklesspart /sysroot${srcmount#/mnt/remote}
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done
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fi
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mkdir -p /sysroot/etc/ssh
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mkdir -p /sysroot/etc/confluent
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mkdir -p /sysroot/root/.ssh
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cp /root/.ssh/* /sysroot/root/.ssh
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chmod 700 /sysroot/root/.ssh
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cp /etc/confluent/* /sysroot/etc/confluent/
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cp /etc/ssh/*key* /sysroot/etc/ssh/
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for pubkey in /etc/ssh/ssh_host*key.pub; do
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certfile=${pubkey/.pub/-cert.pub}
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privfile=${pubkey%.pub}
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if [ -s $certfile ]; then
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echo HostCertificate $certfile >> /sysroot/etc/ssh/sshd_config
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fi
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echo HostKey $privfile >> /sysroot/etc/ssh/sshd_config
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done
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mkdir -p /sysroot/dev /sysroot/sys /sysroot/proc /sysroot/run
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if [ ! -z "$autocons" ]; then
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autocons=${autocons%,*}
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mkdir -p /run/systemd/generator/getty.target.wants
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ln -s /usr/lib/systemd/system/serial-getty@.service /run/systemd/generator/getty.target.wants/serial-getty@${autocons}.service
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fi
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while [ ! -e /sysroot/sbin/init ]; do
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echo "Failed to access root filesystem or it is missing /sbin/init"
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echo "System should be accessible through ssh at port 2222 with the appropriate key"
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while [ ! -e /sysroot/sbin/init ]; do
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sleep 1
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done
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done
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rootpassword=$(grep ^rootpassword: /etc/confluent/confluent.deploycfg)
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rootpassword=${rootpassword#rootpassword: }
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if [ "$rootpassword" = "null" ]; then
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rootpassword=""
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fi
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if [ ! -z "$rootpassword" ]; then
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sed -i "s@root:[^:]*:@root:$rootpassword:@" /sysroot/etc/shadow
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fi
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for i in /ssh/*.ca; do
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echo '@cert-authority *' $(cat $i) >> /sysroot/etc/ssh/ssh_known_hosts
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done
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echo HostbasedAuthentication yes >> /sysroot/etc/ssh/sshd_config
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echo HostbasedUsesNameFromPacketOnly yes >> /sysroot/etc/ssh/sshd_config
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echo IgnoreRhosts no >> /sysroot/etc/ssh/sshd_config
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sshconf=/sysroot/etc/ssh/ssh_config
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if [ -d /sysroot/etc/ssh/ssh_config.d/ ]; then
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sshconf=/sysroot/etc/ssh/ssh_config.d/01-confluent.conf
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fi
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echo 'Host *' >> $sshconf
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echo ' HostbasedAuthentication yes' >> $sshconf
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echo ' EnableSSHKeysign yes' >> $sshconf
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echo ' HostbasedKeyTypes *ed25519*' >> $sshconf
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curl -sf -H "CONFLUENT_NODENAME: $nodename" -H "CONFLUENT_APIKEY: $(cat /etc/confluent/confluent.apikey)" https://$confluent_whost/confluent-api/self/nodelist > /sysroot/etc/ssh/shosts.equiv
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cp /sysroot/etc/ssh/shosts.equiv /sysroot/root/.shosts
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chmod 640 /sysroot/etc/ssh/*_key
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chroot /sysroot chgrp ssh_keys /etc/ssh/*_key
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cp /tls/*.pem /sysroot/etc/pki/ca-trust/source/anchors/
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chroot /sysroot/ update-ca-trust
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curl -sf https://$confluent_whost/confluent-public/os/$confluent_profile/scripts/onboot.service > /sysroot/etc/systemd/system/onboot.service
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mkdir -p /sysroot/opt/confluent/bin
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curl -sf https://$confluent_whost/confluent-public/os/$confluent_profile/scripts/onboot.sh > /sysroot/opt/confluent/bin/onboot.sh
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chmod +x /sysroot/opt/confluent/bin/onboot.sh
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cp /opt/confluent/bin/apiclient /sysroot/opt/confluent/bin
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set_selinux_context system_u:object_r:systemd_unit_file_t:s0 /sysroot/etc/systemd/system/onboot.service
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set_selinux_context system_u:object_r:bin_t:s0 /sysroot/opt/confluent/bin/onboot.sh
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set_selinux_context system_u:object_r:bin_t:s0 /sysroot/opt/confluent/bin/apiclient
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ln -s /etc/systemd/system/onboot.service /sysroot/etc/systemd/system/multi-user.target.wants/onboot.service
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cp /etc/confluent/functions /sysroot/etc/confluent/functions
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if [ -x /sysroot/usr/sbin/matchpathcon ] && grep -Eq '^SELINUX=(enforcing|permissive)' /sysroot/etc/selinux/config 2> /dev/null; then
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# Files written to the upper layer before policy load are unlabeled.
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# Label only those, using globstar since the initramfs has no find.
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selinuxpolicy=$(sed -n 's/^SELINUXTYPE=//p' /sysroot/etc/selinux/config)
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shopt -s globstar dotglob nullglob
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relabel=()
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if [ -f /tmp/mountparts.sh ]; then
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overlayparts=$(awk '{print $3}' /tmp/mountparts.sh)
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else
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overlayparts=/mnt/remote
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fi
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for srcmount in $overlayparts; do
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upperdir=/mnt/overlay/upper
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if [ -f /tmp/mountparts.sh ]; then
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upperdir=/mnt/overlay${srcmount}/upper
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fi
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prefix=${srcmount#/mnt/remote}
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prefix=${prefix%/}
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relabel+=("${prefix:-/}")
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for relpath in "$upperdir"/**; do
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relabel+=("$prefix${relpath#$upperdir}")
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done
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done
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shopt -u globstar dotglob nullglob
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# Not setfiles (recurses) or restorecon (no-op before policy load).
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chroot /sysroot /usr/sbin/matchpathcon -f /etc/selinux/$selinuxpolicy/contexts/files/file_contexts "${relabel[@]}" | while IFS=$'\t' read -r relpath context; do
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if [ "$context" != "<<none>>" ]; then
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chcon -h "$context" "/sysroot$relpath"
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fi
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done
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fi
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if grep installtodisk /proc/cmdline > /dev/null; then
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. /etc/confluent/functions
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run_remote installimage
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exec reboot -f
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fi
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mv /lib/modules/$(uname -r) /lib/modules/$(uname -r)-ramfs
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ln -s /sysroot/lib/modules/$(uname -r) /lib/modules/
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if [ -d /lib/firmware ]; then
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mv /lib/firmware /lib/firmware-ramfs
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fi
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ln -s /sysroot/lib/firmware /lib/firmware
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kill $(grep -l ^/usr/lib/systemd/systemd-udevd /proc/*/cmdline|cut -d/ -f 3)
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if [ $TETHERED -eq 1 ]; then
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(
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sleep 86400 &
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ONBOOTPID=$!
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mkdir -p /run/confluent
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echo $ONBOOTPID > /run/confluent/onboot_sleep.pid
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wait $ONBOOTPID
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dd if=/mnt/remoteimg/rootimg.sfs iflag=nocache count=0 >& /dev/null
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) &
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while [ ! -f /run/confluent/onboot_sleep.pid ]; do
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sleep 0.1
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done
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fi
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exec /opt/confluent/bin/start_root
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