Hi Kairui,
-----Original Message-----
On Fri, Apr 2, 2021 at 10:01 AM HAGIO KAZUHITO(萩尾 一仁)
<k-hagio-ab(a)nec.com> wrote:
>
> Hi,
>
> I hit the following issue and wrote this patch, but I found later that
> it might be better to fix the dracut nfs/ssh-client modules in this case.
> but I'm not familiar with dracut.. could I have any comments?
Hi Kazu,
I agree with you that we better frix it in dracut, I made a simple
patch below, can you have a look or try it?
https://github.com/ryncsn/dracut/commit/c69c223f649e1392e09b6c89bf2df00e9...
Thank you for the patch, I confirmed that both nfs/ssh kdump works well
with it.
And I think after the dracut fix, we still need to detect for host/nss
file change in kdumpctl and rebuild the initramfs on change. Should be
a simple change.
Yes, certainly.
Thanks,
Kazu
>
> Thanks,
> Kazu
>
> From f39a89d5da01cb5f27ff4b1c8a81d6b58601e80c Mon Sep 17 00:00:00 2001
> From: Kazuhito Hagio <k-hagio-ab(a)nec.com>
> Subject: [PATCH] Add /etc/hosts to kdump initramfs for nfs/ssh dump
>
> Currently the /etc/hosts file is not contained in kdump initramfs
> by default. Hosts that depend only on /etc/hosts to resolve IP
> address (i.e. do not have DNS servers) can start kdump service with
> hostname nfs/ssh configuration, but fail in resolving the target
> server's IP address on the 2nd kernel:
>
> mount[355]: mount.nfs: Failed to resolve server dumpsrv: Name or service not
known
> ...
> systemd[1]: kdumproot-dump.mount: Mount process exited, code=exited,
status=32/n/a
> systemd[1]: kdumproot-dump.mount: Failed with result 'exit-code'.
> systemd[1]: Failed to mount /kdumproot/dump.
>
> Add the /etc/hosts file to kdump initramfs when nfs/ssh dump is
> configured. The /etc/nsswitch.conf file is also required for ssh
> dump according to a test.
>
> Signed-off-by: Kazuhito Hagio <k-hagio-ab(a)nec.com>
> ---
> dracut-module-setup.sh | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
> index 8316589b3ac8..c59750810cf0 100755
> --- a/dracut-module-setup.sh
> +++ b/dracut-module-setup.sh
> @@ -874,6 +874,10 @@ install() {
> # nfs/ssh dump will need to get host ip in second kernel and need to call
'ip' tool, see get_host_ip
for more detail
> if is_nfs_dump_target || is_ssh_dump_target; then
> inst "ip"
> + # For hosts that depend only on /etc/hosts to resolve IP address.
> + # /etc/nsswitch.conf is also required for ssh dump.
> + inst "/etc/hosts"
> + inst "/etc/nsswitch.conf"
> fi
>
> # For the lvm type target under kdump, in /etc/lvm/lvm.conf we can
> --
> 2.18.4
>
--
Best Regards,
Kairui Song