Which version of lustre are you using? We initially has problem with this too when using failover with lustre 2.8 and 2.9. We got a patch that fixed it and recent versions work fine for us. We have a combined MGS/MDS so our scenario is a little different but this sounds very similar to our issue.
http://lists.lustre.org/pipermail/lustre-discuss-lustre.org/2017-January/014125.html From: lustre-discuss <[email protected]> on behalf of "Mannthey, Keith" <[email protected]> Date: Wednesday, October 25, 2017 at 11:30 AM To: Ravi Konila <[email protected]>, Lustre Discuss <[email protected]> Subject: Re: [lustre-discuss] MGS is not working in HA Kavi, You may want to open a jira ticket with this error. It looks like the mount command is only trying only the first nid of the mount command. Jira is https://jira.hpdd.intel.com “LU” project. I have seen Lustre Servers first mount behave like this but not client mounts. It should try the first server, timeout and try the 2nd server. Thanks, Keith From: lustre-discuss [mailto:[email protected]] On Behalf Of Ravi Konila Sent: Wednesday, October 25, 2017 5:07 AM To: Lustre Discuss <[email protected]> Subject: [lustre-discuss] MGS is not working in HA Hi I have two servers for MGS/MDS and have configured it pacemaker for HA. The command which I gave on first MGS/MDS mds01 is mkfs.lustre --mgs --failnode 192.168.0.51@o2ib<mailto:192.168.0.51@o2ib> --backfstype=ldiskfs /dev/mapper/mpathd Next I created lustre filesystem for MDT mkfs.lustre --mdt --fsname lhome --index 0 --mgsnode 192.168.0.50@o2ib<mailto:192.168.0.50@o2ib> --mgsnode 192.168.0.51@o2ib<mailto:192.168.0.51@o2ib> --servicenode 192.168.0.50@o2ib<mailto:192.168.0.50@o2ib> --servicenode 192.168.0.51@o2ib<mailto:192.168.0.51@o2ib> --backfstype=ldiskfs /dev/mapper/mpathb Now, in my client, If I give mount –t lustre 192.168.0.50@o2ib:192.168.0.51@o2ib:/lhome<mailto:192.168.0.50@o2ib:192.168.0.51@o2ib:/lhome> /home, it does not work and asks if MGS is running. But if I give mount –t lustre 192.168.0.50@o2ib:/lhome<mailto:192.168.0.50@o2ib:/lhome> /home it works fine. Also when my first MDS (mds01) is down, my client is not mounting lustre from 2nd MGS. It says check if MGS is running? Any help will be highly appreciated. Regards Ravi Konila
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