[LU-8076] conf-sanity test_21e fails with 'add fs2mgs failed'

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Affects Version/s: Lustre 2.9.0
• Environment: autotest review-zfs-part-2
• Severity: 3
• Assignee: WC Triage
• Reporter: James Nunez (Inactive)

Description

conf-sanity test 21e fails on review-zfs-part-2 wth

'add fs2mgs failed' 

The test_log we see that ‘zpool create’ cannot complete because one of the devices is less than 64M:

== conf-sanity test 21e: separate MGS and MDS == 00:31:10 (1461198670)
CMD: trevis-4vm11 grep -c /mnt/fs3ost' ' /proc/mounts
CMD: trevis-4vm11 lsmod | grep lnet > /dev/null && lctl dl | grep ' ST '
CMD: trevis-4vm11 ! zpool list -H lustre-ost2_2 >/dev/null 2>&1 ||
			grep -q ^lustre-ost2_2/ /proc/mounts ||
			zpool export  lustre-ost2_2
CMD: trevis-4vm11 mkfs.lustre --mgs --param=sys.timeout=20 --backfstype=zfs --device-size=3145728 --fsname=test1234 --reformat lustre-ost2_2/ost2_2 /dev/lvm-Role_OSS/S2
trevis-4vm11: 
trevis-4vm11: mkfs.lustre FATAL: Unable to create pool lustre-ost2_2 (256)
trevis-4vm11: 
trevis-4vm11: mkfs.lustre FATAL: mkfs failed 256

   Permanent disk data:
Target:     MGS
Index:      unassigned
Lustre FS:  test1234
Mount type: zfs
Flags:      0x64
              (MGS first_time update )
Persistent mount opts: 
Parameters: sys.timeout=20

mkfs_cmd = zpool create -f -O canmount=off lustre-ost2_2 /dev/lvm-Role_OSS/S2
   cannot create 'lustre-ost2_2': one or more devices is less than the minimum size (64M)
 conf-sanity test_21e: @@@@@@ FAIL: add fs2mgs failed 

We’ve only seen two instances of this failure so far. If this is an issue with our tests running in a small VM, then wouldn’t we expect this test to fail most (all?) of the time?

Recent test failure logs are at
https://testing.hpdd.intel.com/test_sets/77cbf5d2-0773-11e6-b5f1-5254006e85c2
https://testing.hpdd.intel.com/test_sets/cb7f6462-0bf5-11e6-b5f1-5254006e85c2

Issue Links

• is related to: LU-10424 FSTYPE=zfs bash lustre/tests/llmount.sh fails unless /tmp/lustre-{mdt1,ost1,ost2} all exist and have size at least 64M