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Message #23321
[Bug 1766534] Re: libguestfs cannot start the qemu process on s390x
Given the current Final Freeze for 18.04 this will (if done) have to be an SRU for 18.04 as well.
I just did the initial triage, but will leave it for the screener team to ensure it is as needed.
** Also affects: libguestfs (Ubuntu)
Importance: Undecided
Status: New
** Changed in: libguestfs (Ubuntu)
Assignee: (unassigned) => Skipper Bug Screeners (skipper-screen-team)
** No longer affects: linux (Ubuntu)
** Also affects: ubuntu-z-systems
Importance: Undecided
Status: New
** Changed in: ubuntu-z-systems
Assignee: (unassigned) => Skipper Bug Screeners (skipper-screen-team)
** Also affects: libguestfs (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: libguestfs (Ubuntu Bionic)
Importance: Undecided
Assignee: Skipper Bug Screeners (skipper-screen-team)
Status: New
** Also affects: libguestfs (Ubuntu Artful)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1766534
Title:
libguestfs cannot start the qemu process on s390x
Status in Ubuntu on IBM z Systems:
New
Status in libguestfs package in Ubuntu:
New
Status in libguestfs source package in Xenial:
New
Status in libguestfs source package in Artful:
New
Status in libguestfs source package in Bionic:
New
Bug description:
The libguestfs versions < 1.37.22 don't work on s390x, as they don't
contain the patches which include the s390x specifics to instruct qemu-kvm
correctly. Ubuntu 16.04 contains an older version than that, which makes
libguestfs not usable on s390x.
Steps to reproduce
==================
A chronological list of steps which will bring off the issue I noticed:
mz@s390xhost$ docker run -it --privileged --rm ubuntu:xenial bash
root@5dde0aef5d2e:/#
root@5dde0aef5d2e:/#
root@5dde0aef5d2e:/# apt update
root@5dde0aef5d2e:/# DEBIAN_FRONTEND=noninteractive apt install -y \
libguestfs-tools \
python-libguestfs \
linux-image-generic \
qemu
root@5dde0aef5d2e:/#
root@5dde0aef5d2e:/#
root@5dde0aef5d2e:/# export LIBGUESTFS_DEBUG=1
root@5dde0aef5d2e:/# export LIBGUESTFS_TRACE=1
root@5dde0aef5d2e:/# libguestfs-test-tool
Expected result
===============
The libguestfs-test-tool passes and I can use it on s390x.
To check if qemu on s390x works independently from libguestfs, I use this
command:
root@5dde0aef5d2e:/# qemu-system-s390x \
-enable-kvm \
-nographic \
-kernel /boot/vmlinuz-4.4.0-119-generic \
-initrd /boot/initrd.img-4.4.0-119-generic \
-m 1G \
-M s390-ccw-virtio
[...] # boot
BusyBox v1.22.1 (Ubuntu 1:1.22.0-15ubuntu1) built-in shell (ash)
Enter 'help' for a list of built-in commands.
(initramfs)
Actual result
=============
libguestfs instructs qemu to use pci devices and serial consoles
which doesn't work on s390x, e.g.:
root@5dde0aef5d2e:/# libguestfs-test-tool
************************************************************
* IMPORTANT NOTICE
*
* When reporting bugs, include the COMPLETE, UNEDITED
* output below in your bug report.
*
************************************************************
libguestfs: trace: set_verbose true
libguestfs: trace: set_verbose = 0
libguestfs: trace: set_verbose true
libguestfs: trace: set_verbose = 0
LIBGUESTFS_DEBUG=1
LIBGUESTFS_TRACE=1
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
SELinux: sh: 1: getenforce: not found
libguestfs: trace: add_drive_scratch 104857600
libguestfs: trace: get_tmpdir
libguestfs: trace: get_tmpdir = "/tmp"
libguestfs: trace: disk_create "/tmp/libguestfs82Gj1d/scratch.1" "raw" 104857600
libguestfs: trace: disk_create = 0
libguestfs: trace: add_drive "/tmp/libguestfs82Gj1d/scratch.1" "format:raw" "cachemode:unsafe"
libguestfs: trace: add_drive = 0
libguestfs: trace: add_drive_scratch = 0
libguestfs: trace: get_append
libguestfs: trace: get_append = "NULL"
guestfs_get_append: (null)
libguestfs: trace: get_autosync
libguestfs: trace: get_autosync = 1
guestfs_get_autosync: 1
libguestfs: trace: get_backend
libguestfs: trace: get_backend = "direct"
guestfs_get_backend: direct
libguestfs: trace: get_backend_settings
libguestfs: trace: get_backend_settings = []
guestfs_get_backend_settings: []
libguestfs: trace: get_cachedir
libguestfs: trace: get_cachedir = "/var/tmp"
guestfs_get_cachedir: /var/tmp
libguestfs: trace: get_direct
libguestfs: trace: get_direct = 0
guestfs_get_direct: 0
libguestfs: trace: get_hv
libguestfs: trace: get_hv = "/usr/bin/qemu-system-s390x"
guestfs_get_hv: /usr/bin/qemu-system-s390x
libguestfs: trace: get_memsize
libguestfs: trace: get_memsize = 500
guestfs_get_memsize: 500
libguestfs: trace: get_network
libguestfs: trace: get_network = 0
guestfs_get_network: 0
libguestfs: trace: get_path
libguestfs: trace: get_path = "/usr/lib/s390x-linux-gnu/guestfs"
guestfs_get_path: /usr/lib/s390x-linux-gnu/guestfs
libguestfs: trace: get_pgroup
libguestfs: trace: get_pgroup = 0
guestfs_get_pgroup: 0
libguestfs: trace: get_program
libguestfs: trace: get_program = "libguestfs-test-tool"
guestfs_get_program: libguestfs-test-tool
libguestfs: trace: get_recovery_proc
libguestfs: trace: get_recovery_proc = 1
guestfs_get_recovery_proc: 1
libguestfs: trace: get_selinux
libguestfs: trace: get_selinux = 0
guestfs_get_selinux: 0
libguestfs: trace: get_smp
libguestfs: trace: get_smp = 1
guestfs_get_smp: 1
libguestfs: trace: get_tmpdir
libguestfs: trace: get_tmpdir = "/tmp"
guestfs_get_tmpdir: /tmp
libguestfs: trace: get_trace
libguestfs: trace: get_trace = 1
guestfs_get_trace: 1
libguestfs: trace: get_verbose
libguestfs: trace: get_verbose = 1
guestfs_get_verbose: 1
host_cpu: s390x
Launching appliance, timeout set to 600 seconds.
libguestfs: trace: launch
libguestfs: trace: version
libguestfs: trace: version = <struct guestfs_version *>
libguestfs: trace: get_backend
libguestfs: trace: get_backend = "direct"
libguestfs: launch: program=libguestfs-test-tool
libguestfs: launch: version=1.32.2
libguestfs: launch: backend registered: unix
libguestfs: launch: backend registered: uml
libguestfs: launch: backend registered: libvirt
libguestfs: launch: backend registered: direct
libguestfs: launch: backend=direct
libguestfs: launch: tmpdir=/tmp/libguestfs82Gj1d
libguestfs: launch: umask=0022
libguestfs: launch: euid=0
libguestfs: trace: get_backend_setting "force_tcg"
libguestfs: trace: get_backend_setting = NULL (error)
libguestfs: trace: get_cachedir
libguestfs: trace: get_cachedir = "/var/tmp"
libguestfs: [00000ms] begin building supermin appliance
libguestfs: [00000ms] run supermin
libguestfs: command: run: /usr/bin/supermin
libguestfs: command: run: \ --build
libguestfs: command: run: \ --verbose
libguestfs: command: run: \ --if-newer
libguestfs: command: run: \ --lock /var/tmp/.guestfs-0/lock
libguestfs: command: run: \ --copy-kernel
libguestfs: command: run: \ -f ext2
libguestfs: command: run: \ --host-cpu s390x
libguestfs: command: run: \ /usr/lib/s390x-linux-gnu/guestfs/supermin.d
libguestfs: command: run: \ -o /var/tmp/.guestfs-0/appliance.d
supermin: version: 5.1.14
supermin: package handler: debian/dpkg
supermin: acquiring lock on /var/tmp/.guestfs-0/lock
supermin: build: /usr/lib/s390x-linux-gnu/guestfs/supermin.d
supermin: reading the supermin appliance
supermin: build: visiting /usr/lib/s390x-linux-gnu/guestfs/supermin.d/base.tar.gz type gzip base image (tar)
supermin: build: visiting /usr/lib/s390x-linux-gnu/guestfs/supermin.d/daemon.tar.gz type gzip base image (tar)
supermin: build: visiting /usr/lib/s390x-linux-gnu/guestfs/supermin.d/excludefiles type uncompressed excludefiles
supermin: build: visiting /usr/lib/s390x-linux-gnu/guestfs/supermin.d/hostfiles type uncompressed hostfiles
supermin: build: visiting /usr/lib/s390x-linux-gnu/guestfs/supermin.d/init.tar.gz type gzip base image (tar)
supermin: build: visiting /usr/lib/s390x-linux-gnu/guestfs/supermin.d/packages type uncompressed packages
supermin: build: visiting /usr/lib/s390x-linux-gnu/guestfs/supermin.d/packages-hfsplus type uncompressed packages
supermin: build: visiting /usr/lib/s390x-linux-gnu/guestfs/supermin.d/packages-reiserfs type uncompressed packages
supermin: build: visiting /usr/lib/s390x-linux-gnu/guestfs/supermin.d/packages-xfs type uncompressed packages
supermin: build: visiting /usr/lib/s390x-linux-gnu/guestfs/supermin.d/udev-rules.tar.gz type gzip base image (tar)
supermin: mapping package names to installed packages
supermin: resolving full list of package dependencies
supermin: build: 194 packages, including dependencies
supermin: build: 6751 files
supermin: build: 3694 files, after matching excludefiles
supermin: build: 3696 files, after adding hostfiles
supermin: build: 3696 files, after removing unreadable files
supermin: build: 3700 files, after munging
supermin: kernel: picked kernel vmlinuz-4.4.0-119-generic
supermin: kernel: picked modules path /lib/modules/4.4.0-119-generic
supermin: kernel: kernel_version 4.4.0-119-generic
supermin: kernel: modules /lib/modules/4.4.0-119-generic
supermin: ext2: creating empty ext2 filesystem '/var/tmp/.guestfs-0/appliance.d.s5hkw6ja/root'
supermin: ext2: populating from base image
supermin: ext2: copying files from host filesystem
supermin: ext2: copying kernel modules
supermin: ext2: creating minimal initrd '/var/tmp/.guestfs-0/appliance.d.s5hkw6ja/initrd'
supermin: ext2: wrote 9 modules to minimal initrd
supermin: renaming /var/tmp/.guestfs-0/appliance.d.s5hkw6ja to /var/tmp/.guestfs-0/appliance.d
libguestfs: [01090ms] finished building supermin appliance
libguestfs: [01090ms] begin testing qemu features
libguestfs: command: run: /usr/bin/qemu-system-s390x
libguestfs: command: run: \ -display none
libguestfs: command: run: \ -help
libguestfs: command: run: /usr/bin/qemu-system-s390x
libguestfs: command: run: \ -display none
libguestfs: command: run: \ -version
libguestfs: qemu version 2.5
libguestfs: command: run: /usr/bin/qemu-system-s390x
libguestfs: command: run: \ -display none
libguestfs: command: run: \ -machine accel=kvm:tcg
libguestfs: command: run: \ -device ?
libguestfs: [01166ms] finished testing qemu features
libguestfs: trace: get_backend_setting "gdb"
libguestfs: trace: get_backend_setting = NULL (error)
[01172ms] /usr/bin/qemu-system-s390x \
-global virtio-blk-pci.scsi=off \
-nodefconfig \
-enable-fips \
-nodefaults \
-display none \
-machine accel=kvm:tcg \
-cpu host \
-m 500 \
-no-reboot \
-rtc driftfix=slew \
-global kvm-pit.lost_tick_policy=discard \
-kernel /var/tmp/.guestfs-0/appliance.d/kernel \
-initrd /var/tmp/.guestfs-0/appliance.d/initrd \
-device virtio-scsi-pci,id=scsi \
-drive file=/tmp/libguestfs82Gj1d/scratch.1,cache=unsafe,format=raw,id=hd0,if=none \
-device scsi-hd,drive=hd0 \
-drive file=/var/tmp/.guestfs-0/appliance.d/root,snapshot=on,id=appliance,cache=unsafe,if=none \
-device scsi-hd,drive=appliance \
-device virtio-serial-pci \
-serial stdio \
-chardev socket,path=/tmp/libguestfs82Gj1d/guestfsd.sock,id=channel0 \
-device virtserialport,chardev=channel0,name=org.libguestfs.channel.0 \
-append 'panic=1 console=ttyS0 udevtimeout=6000 udev.event-timeout=6000 no_timer_check acpi=off printk.time=1 cgroup_disable=memory root=/dev/sdb selinux=0 guestfs_verbose=1 TERM=xterm'
qemu-system-s390x: Warning: global kvm-pit.lost_tick_policy has invalid class name
Alarm clock
Environment
===========
This affects ubuntu 16.04 (see below)
host
----
$ lsb_release -a
LSB Version: core-9.20160110ubuntu0.2-noarch:core-9.20160110ubuntu0.2-s390x:printing-9.20160110ubuntu0.2-noarch:printing-9.20160110ubuntu0.2-s390x:security-9.20160110ubuntu0.2-noarch:security-9.20160110ubuntu0.2-s390x
Distributor ID: Ubuntu
Description: Ubuntu 16.04.4 LTS
Release: 16.04
Codename: xenial
container
---------
root@5dde0aef5d2e:/# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.3 LTS
Release: 16.04
Codename: xenial
root@5dde0aef5d2e:/# apt-cache policy libguestfs-tools
libguestfs-tools:
Installed: 1:1.32.2-4ubuntu2
Candidate: 1:1.32.2-4ubuntu2
Version table:
*** 1:1.32.2-4ubuntu2 500
500 http://ports.ubuntu.com/ubuntu-ports xenial/universe s390x Packages
100 /var/lib/dpkg/status
Additional information
======================
Please be aware that there this is a known libguestfs upstream bug [1]
which is already fixed and backported by RedHat [2][3] and was the
trigger for a patch series on the libguestfs mailing list [4]. As an
example, the latest known needed patch is [5]. As a smoke test, in case
the libguestfs-test-tool result was a false positive, I used the python
binding code in Appendix A below, which is based on [6].
FWIW, I checked Ubuntu 18.04 (beta), and it doesn't work there too.
The packaged version of libguestfs is v1.36 in 18.04 bionic beaver,
which is too old (and/or doesn't contain the needed backports).
References
==========
[1] Bug 1376547 - qemu-system-s390x: -device isa-serial,chardev=charserial0,
id=serial0: 'isa-serial' is not a valid device model name
https://bugzilla.redhat.com/show_bug.cgi?id=1376547
[2] [Private] Bug 1479526 - [RFE] libguestfs for z Systems
https://bugzilla.redhat.com/show_bug.cgi?id=1479526
[3] The RHEL7.5 branch of libguestfs with backports to v1.36
https://github.com/libguestfs/libguestfs/tree/rhel-7.5
[4] The patch series of libguestfs on s390x:
https://www.redhat.com/archives/libguestfs/2017-May/msg00066.html
[5] Fix of an x86 specific item to enable s390x in v1.37.22
https://github.com/libguestfs/libguestfs/commit/5b60dd4eff02f48d344bcdad0d4bad4676ca9168
[6] https://rwmj.wordpress.com/2010/02/01/libguestfs-python-example/
Appendix A
==========
Smoke test, based on the example from the author of libguestfs [6]:
root@26248e573a87:/# cat smoke.py
#!/usr/bin/python
# To see the Python docs, do: help (guestfs)
# To see the general docs http://libguestfs.org/guestfs.3.html
# For FAQ see http://libguestfs.org/FAQ.html
import os
import guestfs
g = guestfs.GuestFS()
f = open("/tmp/test.img", "w")
f.truncate(500 * 1024 * 1024)
f.close()
g.add_drive("/tmp/test.img")
g.launch()
g.part_disk("/dev/sda", "mbr")
g.mkfs("ext2", "/dev/sda1")
g.mount("/dev/sda1", "/")
f = open("/tmp/ks.cfg", "w")
f.write("# this would be the kickstart file\n")
f.write("#\n")
f.write ("# end of file\n")
f.close()
g.upload("/tmp/ks.cfg", "/ks.cfg")
g.sync()
g.umount_all()
== Comment: #1 - Markus Zoeller <mzoeller@xxxxxxxxxx> - 2018-04-20 06:51:10 ==
With the Debian Sid repository I could install libguestfs v1.38 in an
Ubuntu 18.04 (bionic beaver) container, all on s390x:
[mz@s390xhost]$ docker run -it --privileged --rm s390x/ubuntu:18.04 bash
$ apt update
$ apt install -y vim
$ apt-cache policy libguestfs-tools
$ apt install -y software-properties-common \
debian-archive-keyring \
dirmngr
$ apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 8B48AD6246925553
$ apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 7638D0442B90D010
$ add-apt-repository "deb http://ftp.de.debian.org/debian sid main"
$ cat << EOF > /etc/apt/preferences.d/libguestfs.pref
# Note: 2 blank lines are required between entries
Package: *
Pin: release a=bionic
Pin-Priority: 500
Package: *
Pin: origin "ftp.de.debian.org"
Pin-Priority: 300
# Pattern includes 'python-guestfs' and 'libguestfs-tools' and similarily named dependencies
Package: *guestfs*
Pin: origin "ftp.de.debian.org"
Pin-Priority: 700
EOF
$ cat /etc/apt/preferences.d/libguestfs.pref
$ apt update
$ apt-cache policy libguestfs-tools
$ DEBIAN_FRONTEND=noninteractive apt install -y \
libguestfs-tools \
python-libguestfs \
linux-image-generic \
qemu-system \
qemu-kvm
$ apt-cache policy libguestfs-tools
$ export LIBGUESTFS_DEBUG=1
$ export LIBGUESTFS_TRACE=1
$ libguestfs-test-tool
[...]
===== TEST FINISHED OK =====
This verifies that libguestfs v1.38 has the needed code to work on s390x.
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