[LU-10384] Replace nids doesn't add failover nid and add_conn string to config

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.13.0, Lustre 2.12.1
• Labels: patch
• Severity: 3
• Assignee: Artem Blagodarenko (Inactive)
• Reporter: Artem Blagodarenko (Inactive)

Description

There is MDT-MDT connection problem after failover.

Here is config for MDT0000 (no replace_nids applied for it)

#10 (224)marker  17 (flags=0x01, v2.5.1.0) lustre-MDT0000  ‘add osp’ Wed Aug 30 10:34:36 2017-
#11 (088)add_uuid  nid=192.168.0.112@tcp(0x20000c0a80070)  0:  1:192.168.0.112@tcp  
#12 (144)attach    0:lustre-MDT0000-osp-MDT0001  1:osp  2:lustre-MDT0001-mdtlov_UUID  
#13 (152)setup     0:lustre-MDT0000-osp-MDT0001  1:lustre-MDT0000_UUID  2:192.168.0.112@tcp  
#14 (088)add_uuid  nid=192.168.0.113@tcp(0x20000c0a80071)  0:  1:192.168.0.113@tcp  
#15 (120)add_conn  0:lustre-MDT0000-osp-MDT0001  1:192.168.0.113@tcp  
#16 (136)modify_mdc_tgts add 0:lustre-MDT0001-mdtlov  1:lustre-MDT0000_UUID  2:0  3:1  
#17 (224)END   marker  17 (flags

And MDT0001 config after replace_nids.

#19 (224)marker  20 (flags=0x01, v2.5.1.0) lustre-MDT0001  ‘add osp’ Wed Aug 30 10:34:36 2017-
#20 (088)add_uuid  nid=192.168.0.113@tcp(0x20000c0a80071)  0:  1:192.168.0.113@tcp  
#21 (144)attach    0:lustre-MDT0001-osp-MDT0000  1:osp  2:lustre-MDT0000-mdtlov_UUID  
#22 (152)setup     0:lustre-MDT0001-osp-MDT0000  1:lustre-MDT0001_UUID  2:192.168.0.113@tcp  
#23 (136)modify_mdc_tgts add 0:lustre-MDT0000-mdtlov  1:lustre-MDT0001_UUID  2:1  3:1  
#24 (224)END   marker  20 (flags=0x02, v2.5.1.0) lustre-MDT0001  ‘add osp’ Wed Aug 30 10:34:36 2017-

Replace nids doesn't add failover nid and add_conn string to config. This is the reason ops connection can not be established after failover.

The solution is add option to replace_nids that adds failover record.

Issue Links

• is related to: LUDOC-523 add proper documentation for replace_nids command