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rmrichesjr

Member

Registered: 2018-12-18

Posts: 43  

excalibur installation hangs in late-install-stage2 (in libvirt)

I'm seeing a repeatable problem when installing devuan excalibur aka 6 on libvirt.  The first problematic symptom is a hang for more than 30 minutes with the install UI saying "Finishing the installation" and "Running late-install-stage2..."  This problem appears to be similar to this topic: https://dev1galaxy.org/viewtopic.php?id=7521

Going to vt4 to see the installer's syslog, it appears the installer unmounts and ejects /dev/sr0, then runs script 18-late-install-stage2, which tries to install a few new packages: libestr0 libfastjson4 liblognorm5 rsyslog

Activating vt2, the 'ps' command shows the two last non-kworker, non-ps processes as follows:
- apt-get -y reinstall rsyslog
- /usr/lib/apt/methods/cdrom

My first hunch is that the cdrom got unmounted too early, and that's causing the apt-get package [re]installation to hang.  I'd love to supply screenshots, but I haven't seen how to add an image.

rbit

Member

Registered: 2018-06-12

Posts: 92  

Re: excalibur installation hangs in late-install-stage2 (in libvirt)

My first hunch is that the cdrom got unmounted too early, and that's causing the apt-get package [re]installation to hang.

That's exactly correct.  There's a workaround in the latest installer-iso program, so if/when a 6.0.1 iso is published it will be corrected.

rmrichesjr

Member

Registered: 2018-12-18

Posts: 43  

Re: excalibur installation hangs in late-install-stage2 (in libvirt)

Thank you!  Many additional thanks in advance for a pointer to the details of the workaround, please.  It would be convenient if the workaround could be patched in, either during the running installer or by rebuilding a modified ISO.

rbit

Member

Registered: 2018-06-12

Posts: 92  

Re: excalibur installation hangs in late-install-stage2 (in libvirt)

The first patch that addresses this issue was listed here
https://git.devuan.org/devuan/installer … 2e12e7251c
but then I removed that entirely (and removed other old parts), and placed rsyslog in another part to ensure it gets installed
https://git.devuan.org/devuan/installer … 37ddeb4887
Not sure that's the proper way to do it, but it did pass my initial testing at least.

The first fix could be patched into a running installer, by replacing /usr/lib/finish-install.d/18late-install-stage2

cat <<EOF | tee /usr/lib/finish-install.d/18late-install-stage2 > /dev/null
#!/bin/sh
if [ -f /target/var/lib/dpkg/info/desktop-base.list ]; then
	# desktop-base was installed.  reinstall it after other packages if possible
	if [ -n "\$(grep ^deb\ http /target/etc/apt/sources.list)" ]; then
		# there are online apt sources listed; do not use installation media
		sed -i -e 's/^deb cdrom:/#deb cdrom:/g' /target/etc/apt/sources.list
		in-target sh -c "apt-get -y reinstall desktop-base"
	elif [ -n "\$(ls /target/tmp/desktop-base/desktop-base*.deb 2>/dev/null)" ]; then
		# the deb from installation media is available
		in-target sh -c "cd /tmp/desktop-base ; dpkg -i *.deb"
	else
		# this is an offline installation, and the deb was not found
		log "(offline) unable to reinstall desktop-base: deb file is unavailable"
	fi
fi

# check if rsyslog got installed
if [ ! -f /target/usr/sbin/rsyslogd ]; then
  # not installed; try to install it if possible
  if [ -n "\$(grep ^deb\ http /target/etc/apt/sources.list)" ]; then
    # there are online apt sources listed; do not use installation media
    sed -i -e 's/^deb cdrom:/#deb cdrom:/g' /target/etc/apt/sources.list
    in-target sh -c "apt-get -y reinstall rsyslog"
  elif [ -n "\$(ls /target/tmp/rsyslog/rsyslog*.deb 2>/dev/null)" ]; then
    # offline installation; the deb from installation media is available
    in-target sh -c "cd /tmp/rsyslog ; dpkg -i *.deb"
  else
    # this is an offline installation, and the deb was not found
    log "(offline) unable to install rsyslog: deb file is unavailable"
  fi
fi

# patch for /usr/lib/udev/rules.d/90-alsa-restore.rules
# see: https://dev1galaxy.org/viewtopic.php?pid=57929#p57929
pathname="/target/usr/lib/udev/rules.d/90-alsa-restore.rules"
if [ -f "\$pathname" ]; then
  # verify if patch is required
  if [ \$(grep -c '^LABEL="alsa_restore_go"' \$pathname) -eq 2 ]; then
    # same label exists twice. patch is needed.
    linenum=\$(grep -n '^LABEL="alsa_restore_go"' \$pathname | (read first; read second; echo \$second | cut -d : -f 1))
    # delete the wrong label (2nd one) and insert the correct label
    sed -i -e "\${linenum}cLABEL=\"alsa_restore_std\"" \$pathname
  fi
fi
EOF

Or... to build your own updated ISO:

git clone https://git.devuan.org/devuan/installer-iso.git
cd installer-iso
./build-sudo.sh excalibur netinstall

replace "netinstall" with the iso you want to create (for example, "desktop")
view the README.md file there to see dependencies and other helpful info.

rmrichesjr

Member

Registered: 2018-12-18

Posts: 43  

Re: excalibur installation hangs in late-install-stage2 (in libvirt)

Superb!  Thank you very much!

rmrichesjr

Member

Registered: 2018-12-18

Posts: 43  

Re: excalibur installation hangs in late-install-stage2 (in libvirt)

After installing zsh, tried running ./build-sudo.sh per post #4.  It appears to require a /usr/share/debootstrap/scripts/excalibur file on the build host:

+./build-sudo.sh:8> export LC_ALL=C
+./build-sudo.sh:10> SUITE=excalibur 
+./build-sudo.sh:11> ISOSET=server 
+./build-sudo.sh:12> DISTVERSION=6.0.0-rc1 
+./build-sudo.sh:13> : http://pkgmaster.devuan.org/merged
+./build-sudo.sh:14> dpkg-architecture -q DEB_HOST_ARCH
+./build-sudo.sh:14> : amd64
+./build-sudo.sh:15> : excalibur.amd64.fs
+./build-sudo.sh:17> id -u
+./build-sudo.sh:17> [ 501 '=' 0 ']'
+./build-sudo.sh:21> [ -n '' ']'
+./build-sudo.sh:37> [ ! -d excalibur.amd64.fs ']'
+./build-sudo.sh:39> [ -z -o ! '' '=' N ']'
+./build-sudo.sh:40> [ -e excalibur.amd64.fs ']'
+./build-sudo.sh:48> [ ! -e excalibur.amd64.fs ']'
+./build-sudo.sh:49> echo '# Set up a chroot environment to build in'
# Set up a chroot environment to build in
+./build-sudo.sh:50> [ ! -e /usr/share/debootstrap/scripts/excalibur ']'
+./build-sudo.sh:51> echo 'MISSING debootstrap script /usr/share/debootstrap/scripts/excalibur'
MISSING debootstrap script /usr/share/debootstrap/scripts/excalibur
+./build-sudo.sh:52> exit 1

If I understand that correctly, it means the build host needs an excalibur version of debootstrap.  That would seem to imply that to build a release N ISO requires a release N build machine, which appears to be a chicken-and-egg situation.

In the interim, I'll try to implement the workaround to replace file /usr/lib/finish-install.d/18late-install-stage2 in the running installer.

rmrichesjr

Member

Registered: 2018-12-18

Posts: 43  

Re: excalibur installation hangs in late-install-stage2 (in libvirt)

To close the loop, I used scp from inside the VM to replace the script in the running installer (right after configuring the clock).  The installation finished, and the installed system boots to what appears to be a useful condition.

Thanks!!!!!