Hi Stephen,
On Thu, Mar 16, 2017 at 06:00:39PM -0400, Stephen Powers wrote:
> [root@dal1.sg1b ~]# nbd-server -V
> This is nbd-server version 3.11
> [root@dal1.sg1b ~]# nbd-server 10.8.0.12:1040 /root/testfile -d
>
> ** (process:18247): WARNING **: Specifying an export on the command line is
> deprecated.
>
> ** (process:18247): WARNING **: Please use a configuration file instead.
> ** Message: virtstyle ipliteral
> ** Message: connect from 10.8.0.41, assigned file is /root/testfile
> ** Message: Can't open authorization file /etc/nbd-server/allow (No such file
> or directory).
> ** Message: Authorized client
> ** Message: Starting to serve
> ** Message: Size of exported file/device is 524288000
> Error: Read failed: Connection reset by peer
> Exiting.
>
> [root@hvm2 ~]# nbd-client -N sg1b -l 10.8.0.12 1040 /dev/nbd1
> Negotiation: Error: Server closed connection
> Exiting.
Actually, that "Negotiation:" bit shows you that it quits *during*
negotiation ;-)
Note that it doesn't actually crash, though; since you pass a -d
parameter, it starts the server in debugging mode, which is really meant
for debugging purposes only. In that mode, it will handle one
connection, and then exit. Since your negotiation fails (see below), the
server has no other recourse than to exit after the failed negotiation.
> What is the problem here?
In 3.11 and before, starting a server from the command line starts the
server in oldstyle negotiation. That can't work with a newstyle client
(which is triggered by the "-N <name>" command line option on the
client).
You need to either start the server with a configuration file and do
newstyle negotiation (see "man 5 nbd-server" for that), or start it like
above and do an oldstyle negotiation from the client.
Note also that in newer versions of nbd, oldstyle negotiation was
dropped. For that reason, I recommend that you use newstyle rather than
oldstyle negotiation.
Regards,
--
< ron> I mean, the main *practical* problem with C++, is there's like a dozen
people in the world who think they really understand all of its rules,
and pretty much all of them are just lying to themselves too.
-- #debian-devel, OFTC, 2016-02-12
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Nbd-general mailing list
Nbd-general@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nbd-general
