[LU-4749] ZFS-backed OST mkfs.lustre --servicenode does not correctly add failover_nids

• Type: Bug
• Resolution: Fixed
• Priority: Blocker
• Fix Version/s: Lustre 2.7.0, Lustre 2.5.4
• Affects Version/s: Lustre 2.4.2, Lustre 2.7.0
• Labels: prz zfs
• Environment: CentOS 6.4, ZFS 0.6.2

Epic/Theme

ZFS

• Severity: 3
• Assignee: Li Wei (Inactive)
• Reporter: Anthony Alba

Description

When creating ZFS-backed OSTs using the --servicenode syntax, only one failover nids is stored.

mkfs.lustre --ost --index=1 --fsname=saturn --backfstype=zfs --mgsnode=192.168.122.73@tcp --servicenode=192.168.122.76@tcp --servicenode=192.168.122.78@tcp lsrv3/saturn-ost1

1. tunefs.lustre --print lsrv3/saturn-ost1
   checking for existing Lustre data: found

Read previous values:
Target: saturn-OST0001
Index: 1
Lustre FS: saturn
Mount type: zfs
Flags: 0x1002
(OST no_primnode )
Persistent mount opts:
Parameters: failover.node=192.168.122.78@tcp mgsnode=192.168.122.73@tcp

Permanent disk data:
Target: saturn-OST0001
Index: 1
Lustre FS: saturn
Mount type: zfs
Flags: 0x1002
(OST no_primnode )
Persistent mount opts:
Parameters: failover.node=192.168.122.78@tcp mgsnode=192.168.122.73@tcp

On MGS:

1. lctl get_param osp.saturn-OST0001-osc-MDT0000.import
   osp.saturn-OST0001-osc-MDT0000.import=
   import:
   name: saturn-OST0001-osc-MDT0000
   target: saturn-OST0001_UUID
   state: FULL
   instance: 1
   connect_flags: [lov_index, unused, version, request_portal, adaptive_timeouts, lru_resize, fid_is_enabled, skip_orphan, full20, lvb_type]
   import_flags: [replayable, pingable]
   connection:
   failover_nids: [192.168.122.78@tcp]
   current_connection: 192.168.122.78@tcp

For a ldiskfs-backed OST, two NIDs are stored:

1. mkfs.lustre --ost --index=0 --fsname=saturn --servicenode=192.168.122.76@tcp --mgsnode=192.168.122.73@tcp --reformat /dev/vdb

1. tunefs.lustre --print /dev/vdb
   checking for existing Lustre data: found
   Reading CONFIGS/mountdata

Read previous values:
Target: saturn-OST0000
Index: 0
Lustre FS: saturn
Mount type: ldiskfs
Flags: 0x1002
(OST no_primnode )
Persistent mount opts: errors=remount-ro
Parameters: failover.node=192.168.122.76@tcp failover.node=192.168.122.78@tcp mgsnode=192.168.122.73@tcp

Permanent disk data:
Target: saturn-OST0000
Index: 0
Lustre FS: saturn
Mount type: ldiskfs
Flags: 0x1002
(OST no_primnode )
Persistent mount opts: errors=remount-ro
Parameters: failover.node=192.168.122.76@tcp failover.node=192.168.122.78@tcp mgsnode=192.168.122.73@tcp

exiting before disk write.

1. lctl get_param osp.saturn-OST0000-osc-MDT0000.import
   osp.saturn-OST0000-osc-MDT0000.import=
   import:
   name: saturn-OST0000-osc-MDT0000
   target: saturn-OST0000_UUID
   state: FULL
   instance: 2
   connect_flags: [lov_index, unused, version, request_portal, adaptive_timeouts, lru_resize, fid_is_enabled, skip_orphan, full20, lvb_type]
   import_flags: [replayable, pingable]
   connection:
   failover_nids: [192.168.122.76@tcp, 192.168.122.78@tcp]
   current_connection: 192.168.122.76@tcp

Issue Links

• is related to: LU-4334 With ZFS can only declare a single mgsnode for MDT or OST