[LU-11977] [mount.lustre] Semantics of option 'network' in routed clients

• Type: Improvement
• Resolution: Duplicate
• Priority: Minor
• Affects Version/s: Lustre 2.10.5

Environment

Server:

{noformat}
[root@oss01 lustre-2.10.5_ddn7]# uname -a
Linux le-oss01 3.10.0-862.9.1.el7_lustre.ddn1.x86_64 #1 SMP Tue Sep 11 19:05:37 JST 2018 x86_64 x86_64 x86_64 GNU/Linux
{noformat}

{noformat}
lustre-2.10.5_ddn7-1.el7.x86_64
lustre-osd-ldiskfs-mount-2.10.5_ddn7-1.el7.x86_64
{noformat}

Client:

{noformat}
[root@a2-029 ~]# rpm -qa | grep ^lustre
lustre-client-2.10.5_ddn2_2_gda48415-1.el7.x86_64
[root@lo-a2-029 ~]# uname -a
Linux lo-a2-029 3.10.0-862.14.4.el7.x86_64 #1 SMP Wed Sep 26 15:12:11 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
{noformat}

• Assignee: WC Triage
• Reporter: Diego Moreno

Description

We're currently doing some tests in a multi-tenancy environment with Lustre routers. In this environment we have defined several filesets exported to the same clients but with different LNETs, like:

Client LNETs: tcp0, tcp1
Server LNETs: tcp10, tcp11

The Lustre routers connect the LNETs in the following way: tcp0 <> tcp10, tcp1 <> tcp11

• Fileset data1: ranges=<client_ip>@tcp0
• Fileset data2: ranges=<client_ip>@tcp1

Now when we look at the 'network' option in mount.lustre:

       network=net
              Limit  connections  from  the  client  to be on the network NID specified by 'net'.  ´net´ designates a single network NID, like 'o2ib2' or 'tcp1'.  This option can be useful in case of several Lustre client mount points on the same node, with each mount point using a different network. It is also interesting when running Lustre clients from containers, by restricting each container to a specific network.

Since it's limiting the connections from the client we should use the following command to mount dataset2:

mount -t lustre -o network=tcp1 <mgs_ip>@tcp11:/ /lustre/dataset2

But that's not working because network needs to be the network on the server. This is working:

mount -t lustre -o network=tcp11 <mgs_ip>@tcp11:/ /lustre/dataset2

The semantics of the option is not respected.

After discussing with Sebastien it looks like LU-11959 would be the patch for this.

Issue Links

• duplicates: LU-11959 Improve handling of 'network' client mount option

Comments

[Peter Jones]

ok thanks!

[Diego Moreno]

Peter,

That sounds good, just wanted to give the use case of LU-11959 since Sebastien asked for it. Maybe it would have been better to just add a comment there, sorry...

[Peter Jones]

Diego

It sounds like you agree that this request is a duplicate of LU-11959. Is there anything else that you are wanting from this ticket?

Peter