Bug 920609

(In reply to comment #0)
> Description of problem:
> 
> inspect-get-hostname return unknown for all linux guest,

*All* Linux guests?  Can you give me a specific version
of a Linux guest that fails?

Does this still happen when you're not using guestfish --listen?
(The reason is that it's rather harder to debug this in remote
mode).  Try:

  guestfish -v -x --add $GSTEST_image_path
  ><fs> run
  ><fs> inspect-os
  [it prints a root here]
  ><fs> inspect-get-hostname [root]

That will produce a lot of debug output, because of -v and -x
options, so attach all of it to the bug report.

(In reply to comment #2)
> (In reply to comment #0)
> > Description of problem:
> > 
> > inspect-get-hostname return unknown for all linux guest,
> 
> *All* Linux guests?  Can you give me a specific version
> of a Linux guest that fails?

yes, all linux guestfs, 4.8, 5.x, 6.3

> 
> Does this still happen when you're not using guestfish --listen?
> (The reason is that it's rather harder to debug this in remote
> mode).  Try:
> 
>   guestfish -v -x --add $GSTEST_image_path
>   ><fs> run
>   ><fs> inspect-os
>   [it prints a root here]

there is another problem i'm going to report, the return is empty if not in remote mode,

>   ><fs> inspect-get-hostname [root]
> 
> That will produce a lot of debug output, because of -v and -x
> options, so attach all of it to the bug report.

as above

(In reply to comment #4)
> (In reply to comment #2)
> > Does this still happen when you're not using guestfish --listen?
> > (The reason is that it's rather harder to debug this in remote
> > mode).  Try:
> > 
> >   guestfish -v -x --add $GSTEST_image_path
> >   ><fs> run
> >   ><fs> inspect-os
> >   [it prints a root here]
> 
> there is another problem i'm going to report, the return is empty if not in
> remote mode,

That's peculiar.  What is the output of:

guestfish -v -x --add /path/to/the/linux.img run : inspect-os

?

i just can't reproduce the inspect-os return empty problem, maybe just some display problem, i will mark it down.

now here is full debug log for inspect-get-hostname, for more pls see the attachment, 



libguestfs: trace: vfs_type = "swap"
libguestfs: check_for_filesystem_on: /dev/vg_dhcp669266/lv_swap 0 0 (swap)
libguestfs: trace: inspect_os = ["/dev/vg_dhcp669266/lv_root"]
/dev/vg_dhcp669266/lv_root

><fs> inspect-get-hostname /dev/vg_dhcp669266/lv_root                                                                                                                                                            
libguestfs: trace: inspect_get_hostname "/dev/vg_dhcp669266/lv_root"
libguestfs: trace: inspect_get_hostname = "unknown"
unknown

Created attachment 710408 [details]
libguestfs debug log

From the log what happens is that we read /etc/sysconfig/network
looking for a HOSTNAME=... entry in this file.  Augeas says there
is no such entry.

So it could be:

 - There really is no HOSTNAME entry in /etc/sysconfig/network

 - Augeas is broken in some way

 - Some other file contains the hostname [however I know this is
   not true for all RHEL <= 6]

Can you let us know the contents of /etc/sysconfig/network?  ie:

  virt-cat -a /path/to/the/linux.img /etc/sysconfig/network

(In reply to comment #8)
> From the log what happens is that we read /etc/sysconfig/network
> looking for a HOSTNAME=... entry in this file.  Augeas says there
> is no such entry.
> 
> So it could be:
> 
>  - There really is no HOSTNAME entry in /etc/sysconfig/network
> 
>  - Augeas is broken in some way

actually we have the hostname in /etc/sysconfig/network, 

[root@hp-z220-02 images]# virt-cat -a RHEL-Server-6.0-32-hvm.raw /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=dhcp-66-92-66.nay.redhat.com
[root@hp-z220-02 images]# virt-cat -a RHEL-Server-6.0-64-hvm.raw /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=dhcp-66-92-66.nay.redhat.com



> 
>  - Some other file contains the hostname [however I know this is
>    not true for all RHEL <= 6]
> 
> Can you let us know the contents of /etc/sysconfig/network?  ie:
> 
>   virt-cat -a /path/to/the/linux.img /etc/sysconfig/network

$ mkdir -p /tmp/p/etc/sysconfig
$ cat > /tmp/p/etc/sysconfig/network
NETWORKING=yes
HOSTNAME=dhcp-66-92-66.nay.redhat.com
$ augtool -r /tmp/p
augtool> ls /files
[no output ... wtf?]

It looks as if Augeas in RHEL 7 doesn't parse /etc/sysconfig/network
at all?

augeas-1.0.0-1.el7.x86_64

(In reply to comment #10)
> $ mkdir -p /tmp/p/etc/sysconfig
> $ cat > /tmp/p/etc/sysconfig/network
> NETWORKING=yes
> HOSTNAME=dhcp-66-92-66.nay.redhat.com
> $ augtool -r /tmp/p
> augtool> ls /files
> [no output ... wtf?]
> 
> It looks as if Augeas in RHEL 7 doesn't parse /etc/sysconfig/network
> at all?
> 
> augeas-1.0.0-1.el7.x86_64

This doesn't work on F18 either.  However it does work in RHEL 6.

Same issue reported in bug #904222.

Fixed upstream: https://github.com/hercules-team/augeas/commit/d6959e62

Verified with augeas-1.1.0-1.el7.x86_64,

[root@hp-dl385g7-13 home]# guestfish -a RHEL-Server-5.9-64-hvm.raw 

Welcome to guestfish, the guest filesystem shell for
editing virtual machine filesystems and disk images.

Type: 'help' for help on commands
      'man' to read the manual
      'quit' to quit the shell

><fs> run
 100% ⟦▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒⟧ 00:00
><fs> inspect-os
/dev/VolGroup00/LogVol00
><fs> inspect-get-hostname /dev/VolGroup00/LogVol00
localhost.localdomain
><fs> quit

[root@hp-dl385g7-13 home]# virt-cat -a RHEL-Server-5.9-64-hvm.raw /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=no
HOSTNAME=localhost.localdomain

Also works for rhel6, rhel7. for rhel7, it parses /etc/hostname instead of /etc/sysconfig/network

So change the status to verified

This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.