3:05 p.m.
Le 19/11/2014 18:12, Richard W.M. Jones a écrit :
On Wed, Nov 19, 2014 at 04:42:23PM +0100, Nicolas Ecarnot wrote:
> disks:
> nbd:localhost:33363 (raw) [sda]
> nbd:localhost:49584 (raw) [sdb]
> nbd:localhost:41988 (raw) [sdc]
> removable media:
>
> NICs:
>
> [ 0.0] Creating an overlay to protect the source from being modified
> qemu-img create -q -f qcow2 -b 'nbd:localhost:33363' -o
> 'compat=1.1,backing_fmt=raw' /var/tmp/v2vovl636444.qcow2
> nbd.c:nbd_receive_negotiate():L501: read failed
> qemu-img: /var/tmp/v2vovl636444.qcow2: Could not open
> 'nbd:localhost:33363': Could not open image: Invalid argument:
> Invalid argument
What is supposed to happen is that qemu-nbd is started (3 times) on
the virt-p2v machine. Then 3 x ssh connections are made which reverse
proxy the nbd connection from virt-v2v back to virt-p2v, the
equivalent of:
ssh -R 33363:localhost:<hostport> virt-v2v-server
Somehow that's not happening.
I'm not sure what. Is this reproducible? Do you have an unusual
firewall configuration on the virt-v2v conversion server?
Rich.
It is 100% reproductible.
Your interesting comment lead me to keep a better look at
/var/log/secure on the conversion server :
The "test" button succeed in connecting. I see it in the logs.
Nov 19 21:48:23 serv-p2v-adm1 sshd[2654]: Accepted password for root
from 192.168.49.5 port 36574 ssh2
Nov 19 21:48:23 serv-p2v-adm1 sshd[2654]: pam_unix(sshd:session):
session opened for user root by (uid=0)
Nov 19 21:48:23 serv-p2v-adm1 sshd[2654]: Received disconnect from
192.168.49.5: 11: disconnected by user
Nov 19 21:48:23 serv-p2v-adm1 sshd[2654]: pam_unix(sshd:session):
session closed for user root
Here I wait on purpose a long time to distinguish what is happening in
the log files.
I'm filling in the different fields in the conversion screen, the I
launch the conversion, and I see that :
(192.168.49.5 is the source machine)
Nov 19 21:54:52 serv-p2v-adm1 sshd[2725]: Accepted password for root
from 192.168.49.5 port 36575 ssh2
Nov 19 21:54:52 serv-p2v-adm1 sshd[2725]: pam_unix(sshd:session):
session opened for user root by (uid=0)
Nov 19 21:54:52 serv-p2v-adm1 sshd[2727]: Accepted password for root
from 192.168.49.5 port 36576 ssh2
Nov 19 21:54:52 serv-p2v-adm1 sshd[2727]: pam_unix(sshd:session):
session opened for user root by (uid=0)
Nov 19 21:54:53 serv-p2v-adm1 sshd[2725]: channel 2: open failed:
connect failed: Connection refused
Nov 19 21:54:53 serv-p2v-adm1 sshd[2727]: Received disconnect from
192.168.49.5: 11: disconnected by user
Nov 19 21:54:53 serv-p2v-adm1 sshd[2725]: Received disconnect from
192.168.49.5: 11: disconnected by user
Nov 19 21:54:53 serv-p2v-adm1 sshd[2725]: pam_unix(sshd:session):
session closed for user root
Nov 19 21:54:53 serv-p2v-adm1 sshd[2727]: pam_unix(sshd:session):
session closed for user root
Indeed, I see "Connection refused".
Let's investigate on this.
On the conversion server (serv-p2v-adm1), before running all this, I did
a "iptables -F" (and a restart of NFS - not knowing if it was needed),
so I have no rule in iptables now.
Do I have to find a way to increase the verbosity of sshd in
/var/log/secure?
Another point : as I wrote it before, I have no way to get a shell
prompt on the source machine, because alt-F1 leads to a blinking screen
trying to run virt-p2v and failing and respawning.
I nmap'd this source host, and saw that ssh was open.
In order to run the action step by step, is there a way to connect to
this root account? What password? (already tried
secret/p2v/root/password/PASSWORD/redhatrulez but that did not the trick)
Regards,
--
Nicolas Ecarnot