[LU-7134] Ensure ZFS hostid protection if servicenode/failover options given to mkfs.lustre

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.9.0
• Labels: zfs
• Assignee: Nathaniel Clark
• Reporter: Nathaniel Clark

Description

SPL import protection only exists if hostid is set to a non-zero value. If servicenode or failover is given as an option, then mkfs.lustre should at least warn that hostid is set to zero and import protection won't work.

Proposed solution:

• Have mkfs.lustre fail if --servicenode / --failover is specified and hostid is zero (will check spl_hostid value).
• Add override option --force-nohostid to ignore this case

Issue Links

• is related to: LU-7797 Can't mount zpools after OSS restart
• is related to: LU-8816 test-framework needs to reload SPL module after set hostid
• is related to: LU-3163 conf-sanity test_61 reformats MDT but not OST
• is related to: LU-6889 new kernel [SLES11 SP4 3.0.101-65]
• links to: ZFS Issue #745: Multi mount support