Re: Netconsole scripts for Debian
Hello!
It's very important for debugging kernel oops when syslog over network
running, because syslog can't send any information on dead kernel.
When you haven't persistent kvm/idrac/ilo it's only one way for
getting debug information about kernel hang.
But why I need to integrate it with initrd?
On Wed, Jun 18, 2014 at 10:19 AM, Ritesh Raj Sarraf <rrs@debian.org> wrote:
>
>
> On 06/17/2014 03:00 PM, Pavel Odintsov wrote:
>> Hello, folks!
>>
>> I'm prepared and thoroughly tested scripts for managing netconsole
>> kernel facility in Debian 6/7. Netconsole facility is very useful for
>> debugging kernel bugs.
>>
>> These scripts are inspired by CentOS 6 netconsole scripts in some
>> cases and work in same way. Scripts are written in clean bash.
>>
>> All scripts and configuration you can find here:
>> https://github.com/FastVPSEestiOu/debian_netconsole
>>
>> Yes, it's possible to configure netconsole statically (i.e. as
>> /etc/modprobe.d/netconsole.conf) but it's a bad way because it relies
>> on network configuration (i.e. gateway address, server address) which
>> may be changed and netconsole will not work.
>>
>> I tested both startup option:
>> 1) As /etc/init.d/netconsole
>> 2) As /etc/network/if-up.d/netconsole script
>>
>> IMHO, the first variant is more reliable and convenient for this task.
>> But both variants have some troubles because some network cards (like
>> e1000) call /etc/network/if-up.d and /etc/init.d scripts on network
>> level BEFORE real network initialization.
>>
>> I fixed this issue only by adding fixed timeout in my
>> /etc/init.d/netconsole script. In the same way this issue was fixed in
>> RH. Maybe you can provide more convenient solution?
>>
>> Thank you for any feedback!
>>
>
>
> You should add support for it in initrd. netconsole is more useful at
> that stage. In real boot, why would one want netconsole if syslog is
> running.
>
>
> --
> Given the large number of mailing lists I follow, I request you to CC me
> in replies for quicker response
>
--
Sincerely yours, Pavel Odintsov
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