On 16/3/12 1:29 PM, Florian Haas wrote:
On Fri, Mar 16, 2012 at 10:36 AM, France<mailingli...@isg.si> wrote:
Hi,
i'm hitting a bug in drbd, with latest CentOs and drbd 8.3.12 using GFS2 on
top with cman and rgmanager.
Here is the simplest method to have it occur.
1. Start drbd on node s2
2. Start drbd on node s3
They sync up:
[root@s3 ~]# cat /proc/drbd
version: 8.3.12 (api:88/proto:86-96)
GIT-hash: e2a8ef4656be026bbae540305fcb998a5991090f build by dag@Build64R6,
2011-11-20 10:57:03
0: cs:Connected ro:Primary/Primary ds:UpToDate/UpToDate C r-----
ns:0 nr:45060 dw:45056 dr:660 al:0 bm:11 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b
oos:0
3. Start cman on s2& s3, so i can use gfs2: cluster is up OK:
[root@s3 ~]# cman_tool status
Version: 6.2.0
Config Version: 8
Cluster Name: stor
Cluster Id: 61164
Cluster Member: Yes
Cluster Generation: 140
Membership state: Cluster-Member
Nodes: 2
Expected votes: 1
Total votes: 2
Node votes: 1
Quorum: 1
Active subsystems: 7
Flags: 2node
Ports Bound: 0
Node name: s3alt.c.XX.si
Node ID: 3
Multicast addresses: 239.192.238.219 239.192.0.2
Node addresses: 192.168.168.3 10.31.0.42
4. Start gfs2 on both nodes:
Mar 16 10:29:41 s3 kernel: GFS2 (built Mar 7 2012 00:54:51) installed
Mar 16 10:29:41 s3 kernel: GFS2: fsid=: Trying to join cluster "lock_dlm",
"stor:drbdstor"
Mar 16 10:29:41 s3 kernel: dlm: Using SCTP for communications
That's the root cause of your problem.
This is a known issue, and although it's apparently DRBD that's
causing this panic, its own code isn't to blame for this.
DLM-over-SCTP isn't fully supported, and unless you can entice (i.e.
pay) someone to fix it, you won't get this to work reliably.
Sadly, it's apparently impossible to force DLM-over-TCP for multihomed
hosts, so the only way to work around this seems to be to just run the
DLM on box with a single (possibly bonded) network interface, silly as
that may sound.
A more detailed discussion of this issue is here:
http://www.mail-archive.com/drbd-user@lists.linbit.com/msg04492.html
Hope this helps.
Cheers,
Florian
Thank you for your reply Florian.
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