Libguestfs - Mar 2018 - Re: Compilation on OL7.4 - Tests fail (possibly) due to libyajl

On Thu, Mar 29, 2018 at 10:51:46AM +0200, Claudio Sasso
wrote:
> The guestfsd executable in appliance/supermin.d/ seems to link yajl
> correctly
> $ cp -r libguestfs-1.38.0/appliance/supermin.d/*tar.gz /tmp/supermin.d/
> $ cd /tmp/supermin.d/
> $ for i in *tar.gz; do tar -xzf $i; done
> $ ldd ./usr/sbin/guestfsd
You're nearly there with your analysis.  The problem is that
yajl isn't being copied into the appliance for some reason.

Try doing:

  ./run virt-rescue --scratch
  ><rescue> ldd /usr/sbin/guestfsd

and you should see the missing/broken dependency.

This is controlled by appliance/packagelist (generated from
appliance/packagelist.in).  I'm guessing for some reason yajl does not
appear in this file.

You could add it to the file and then do:

  make -C appliance clean-supermin-appliance
  make -C appliance
  rm -rf tmp/.guestfs-*
  make quickcheck

If that doesn't fix it then it's probably something to do with the
yajl RPM itself.  Perhaps the RPM metadata doesn't list all of the
files in yajl or something like that, so supermin doesn't know what
files to copy into the appliance.  You'll probably need to run
supermin by hand with extra -v options to see what's going on in this
case.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-p2v converts physical machines to virtual machines.  Boot with a
live CD or over the network (PXE) and turn machines into KVM guests.
http://libguestfs.org/virt-v2v

[Let's keep replies on the list please]

On Thu, Mar 29, 2018 at 02:16:31PM +0200, Claudio Sasso
wrote:
> Hi Richard,
> 
> thanks for the suggestions; I think I have a more fundamental
> problem here, as after I added yajl, it complained about hivex, then
> about augeas. But for now I would be content with a working build,
> and later address the underling root cause if any, so for now I am
> adding them all; but I am stuck with libiconv as I have built it
> manually, so it's not a package. What could be a "proper" way
to add
> it to the supermin image?
> 
>    $  make quickcheck
> 
>    ...
> 
>    + guestfsd --verbose
>    guestfsd: error while loading shared libraries: libiconv.so.2:
>    cannot open shared object file: No such file or directory
>    + sync
>    + test '' = 1
>    + reboot -f
> 
>    $ ldd /tmp/supermin.d/usr/sbin/guestfsd
>    ...
> 
>        libiconv.so.2 => /home/vm/install/lib/libiconv.so.2
>    (0x00007fc03464d000)
> 
> I could not check the linkage with ./run virt-rescue --scratch, as
> the shell appears to be blocked whatever command I type. Here's the
> output (some of the errors may be the root cause of all that? on the
> same system build 1.34 works, built following the same recipe):
> 
>    $ ./run virt-rescue --scratch
>    [    0.168448] usbserial: usb_serial_init - usb_register failed
>    [    0.169093] usbserial: usb_serial_init - returning with error -19
>    supermin: mounting /proc
>    supermin: ext2 mini initrd starting up: 5.1.19 glibc
>    Starting /init script ...
>    [/usr/lib/tmpfiles.d/systemd.conf:11] Unknown group 'utmp'.
>    [/usr/lib/tmpfiles.d/systemd.conf:19] Unknown user
'systemd-network'.
>    [/usr/lib/tmpfiles.d/systemd.conf:20] Unknown user
'systemd-network'.
>    [/usr/lib/tmpfiles.d/systemd.conf:21] Unknown user
'systemd-network'.
>    [/usr/lib/tmpfiles.d/systemd.conf:25] Unknown group
'systemd-journal'.
>    [/usr/lib/tmpfiles.d/systemd.conf:26] Unknown group
'systemd-journal'.
>    starting version 219
>    specified group 'input' unknown
>    /init: line 120: ip: command not found
>    /init: line 121: ip: command not found
>    mdadm: No arrays found in config file or automatically
>       WARNING: Failed to connect to lvmetad. Falling back to device
>    scanning.
>    mdadm: No arrays found in config file or automatically
>    [
>    ]
>    guestfsd: error while loading shared libraries: libiconv.so.2:
>    cannot open shared object file: No such file or directory
> 
>    ------------------------------------------------------------
> 
>    Welcome to virt-rescue, the libguestfs rescue shell.
> 
>    Note: The contents of / (root) are the rescue appliance.
>    You have to mount the guest’s partitions under /sysroot
>    before you can examine them.
> 
>     ><rescue> ldd /usr/sbin/guestfsd
>    .... wait forever ...
There's obviously some big problem going on.  You could try this:

  supermin5 --build \
    /path/to/libguestfs/appliance/supermin.d \
    -o /tmp/root -f chroot

and see if /tmp/root/usr/lib64/libiconv.so.2 is being copied from
the host.

To find out why it's not working, keep adding -v options to the
supermin command line to enable more and more debug, and compare it to
the source:

  https://github.com/libguestfs/supermin/blob/master/src/mode_build.ml#L85

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-p2v converts physical machines to virtual machines.  Boot with a
live CD or over the network (PXE) and turn machines into KVM guests.
http://libguestfs.org/virt-v2v