On 02/11/2011 01:30 AM, Ulrich Windl wrote:
Hi,
somehow I got stuck: I have a new machine with SLES11 SP1, and I'm trying to
use openiscsi after a long time (and the first time with SLES11).
Discovery doesn't work for some unknown reason:
# iscsiadm -m discovery -t sendtarget -p name.domain.uni-regensburg.de
iscsiadm: discovery record [name.domain.uni-regensburg.de,3260] not found!
#
It looks like it is looking up the discovery record instead of doing
discovery. What version of open-iscsi tools is this?
What does
iscsiadm -m discovery -t sendtarget -p name.domain.uni-regensburg.de -l
do?
Trying to run iscsid in debug mode seems to suggest that the daemon isn't even
contacted:
# iscsid -d8 -f
iscsid is not really used for discovery. iscsiadm will just ask it for
the initiator name it is using and that is it. So iscsiadm with -d 8 is
more helpful in this case.
As a side-note: "rcopen-iscsi" doesn't want to stop or restart the daemon:
# rcopen-iscsi stop
Stopping iSCSI initiator service: skipped
But the daemon was ruinning:
11442 ? Ss 0:01 /sbin/iscsid -c /etc/iscsi/iscsid.conf -n
11443 ? S<Ls 0:03 /sbin/iscsid -c /etc/iscsi/iscsid.conf -n
Do I have to populate the directory /etc/iscsi/send_targets/ by hand?
No.
Maybe it's a configuration error on SLES11 SP1: That directory
(/etc/iscsi/send_targets/) doesn't exist!
iscsiadm and iscsid will create the dirs it needs for you.
Another side-note: Doing strace on iscsiadm it seems you are using files for
accieving mutual exclusion:
open("/etc/iscsi/lock", O_RDWR|O_CREAT, 0666) = 3
close(3) = 0
link("/etc/iscsi/lock", "/etc/iscsi/lock.write") = 0
/* critical section */
unlink("/etc/iscsi/lock.write") = 0
Why not use something like open("/etc/iscsi/lock.write", O_RDWR|O_CREAT|O_EXCL,
0666)
and unlink("/etc/iscsi/lock.write")?
How would that work? Would you loop on the open instead of the link then?
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