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From Umair Azam <ua...@i2cinc.com>
Subject NFS machine not responding, timed out issue
Date Wed, 12 Feb 2014 01:00:15 GMT
I am facing an error while setting up cloud system, following issue 
arises when management server machine requests hypervisor to launch 
CP/SS VM's. After this request hypervisor tries to contact primary 
storage to access storage but that primary storage server doesn't 
responds, following are the logs from Xenserver hypervisor.

Feb 12 04:58:34 xenserver-Host1 kernel: [74147.731174] e1000e: eth0 NIC 
Link is Down
Feb 12 04:58:38 xenserver-Host1 fe: 21450 
(/opt/xensource/bin/tapdisk-cache-stats 
91ad2c66-de6b-99f1-b4d9-de264fffbb39) exitted with code 1
Feb 12 04:58:43 xenserver-Host1 fe: 21471 
(/opt/xensource/bin/tapdisk-cache-stats 
91ad2c66-de6b-99f1-b4d9-de264fffbb39) exitted with code 1
Feb 12 04:58:48 xenserver-Host1 tapdisk[20281]: ERROR: errno -5 at 
vhd_complete: 
/var/run/sr-mount/64efe7d9-2e45-743b-8a7e-8631a2c36185/a30e8119-0965-49db-9e17-9a3429110d06.vhd:

op: 2, lsec: 385070, secs: 2, nbytes: 1024, blk: 94, blk_offset: 65687
Feb 12 04:58:48 xenserver-Host1 kernel: [74161.121077] nfs: server 
10.11.17.33 not responding, timed out

(hypervisor machine reboots itself after that due to HA enabled)

Primary storage server logs are below. (centos machines)

Feb 12 04:51:00 storage-server rpc.mountd[1751]: authenticated mount 
request from 10.11.17.32:788 for /export/primary (/export)
Feb 12 04:51:00 storage-server rpc.mountd[1751]: authenticated unmount 
request from 10.11.17.32:801 for /export/primary (/export)
Feb 12 04:51:00 storage-server rpc.mountd[1751]: authenticated mount 
request from 10.11.17.32:830 for /export/primary (/export)

Issue seems to be strange because all necessary NFS ports are open in 
sysconfig/nfs file, iptables service is also off and both machines can 
ping each other successfully.

-- 
Umair Azam
Associate Systems Administrator
Network Operations Center
i2c Incorporated
1300 Island Drive, Suite 105
Redwood City, CA 94065-5170
Desk: +1 650.480.5291
PBX: +1 650.593.5400 x 4244
24x7 NOC: +1 650.480.5291
Fax: +1 650.593.5402
URL: www.i2cinc.com
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