[Bug 690042] Re: libvirtd tries to disable ipv6's accept_ra even when ipv6 is disabled outright in the kernel

[Anomaly256]

Simply compile a kernel without ipv6 support.

Libvirt blindly assumes the /proc/sys/net/ipv6/* entries exist and fails
to gracefully continue when they are not writable.


----- Original message -----
> Can you please add more steps to reproduce this bug? It's not clear to
> me when this happens although I have found the problem in the source
> code. It is hardly to test it even when I make change to code.
> 
> -- 
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/690042
> 
> Title:
>     libvirtd tries to disable ipv6's accept_ra even when ipv6 is disabled
>     outright in the kernel
> 
> Status in “libvirt” package in Ubuntu:
>     Confirmed
> 
> Bug description:
>     When the system has ipv6 disabled outright, /usr/sbin/libvirtd still
>     tries to blindly disable accept_ra despite it's destined failure to
>     open /proc/sys/net/ipv6/conf/virbr1/accept_ra.   It does not continue
>     past this failure.
> 
>     Expected behavior is that it should either attempt to stat this
>     file/path first, then continue without disabling accept_ra should it
>     not exist, or at a minimum continue to start the network in spite of
>     the failure to open the file.
> 
>     Note: At the moment, this issue is a complete BLOCKER for me.   Not
>     simply a mere inconvenience.   The current immaturity of ipv6 support
>     is some applications has forced the need for me to disable it outright
>     to prevent some 3rd party services from trying to bind to ipv6
>     interfaces.
> 
>     virsh # net-start Virtual_Cloud
>     error: Failed to start network Virtual_Cloud
>     error: cannot disable /proc/sys/net/ipv6/conf/virbr1/accept_ra: No
> such file or directory
> 
>     Using version:
>     # dpkg --list | grep libvirt
>     ii   libvirt-bin                                                                                 
> 0.7.5-5ubuntu27.7                                                             the programs for the
> libvirt library   ii   libvirt0                                                                                     
>   0.7.5-5ubuntu27.7                                                             library for interfacing
> with different virtu   ii   python-libvirt                                                               
>             0.7.5-5ubuntu27.7                                                             libvirt Python
> bindings
> 
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https://bugs.launchpad.net/bugs/690042

Title:
  libvirtd tries to disable ipv6's accept_ra even when ipv6 is disabled
  outright in the kernel

To manage notifications about this bug go to:
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