[Crash-utility] netdump issue

[Jeff Moyer]

Anirudh Srinivasan <srianirudh at gmail.com> writes:

> I am implementing a netdump . I crashed one sever and got the vmcore file in
> /var/crash/vmcore , then i checked the kernel version through
>
> strings vmcore | fgrep -m1 'Linux'
> Linux version 2.4.21-40.ELsmp (bhcompile at hs20-bc1-7.build.redhat.com) (gcc
> version 3.2.3 20030502 (Red Hat Linux 3.2.3-54)) #1 SMP Thu Feb 2 22:22:39
> EST 2006
> So now while installing the kernel-debuginfo , it should match the version
> above i.e something like "kernel-debuginfo.2.4.21.40.ELsmp.i368.rpm"
>
> But i installed the closest one and that was
> kernel-debuginfo.2.4.21.40.EL.i386.rpm but after installing them i should
> have /usr/lib/debug/module/vmlinux , which i could'nt see them .

Not quite right.  If you do:

# rpm -qpl kernel-debuginfo-2.4.21-40.EL.i686.rpm | grep vmlinux

you'll see:

/usr/lib/debug/boot/vmlinux-2.4.21-40.EL.debug
/usr/lib/debug/boot/vmlinux-2.4.21-40.ELhugemem.debug
/usr/lib/debug/boot/vmlinux-2.4.21-40.ELsmp.debug

You, of course, want the smp version.  I'm assuming you want to examine
the core file with crash.  If so, something like the following should
work:

crash /usr/lib/debug/boot/vmlinux-2.4.21-40.ELsmp.debug /path/to/vmcore

> Can anyone give me the link to the rpm i am looking for , or suggest some
> idea. ( the server that i am dumping  vmcore is version 5 )

You mean the netdump server is running on a RHEL 5 system?  That is
fine.

> I have bunch of server with version 2 and version 3  and version 4 in my
> production environment for which i have to configure netdump to collect the
> vmcore in version 5 server .

Right, running the netdump server on a RHEL 5 system is fine.  You
should have no problems collecting vmcores from your AS 2.1, RHEL 3 and
RHEL 4 systems.

Cheers,
Jeff