[LU-14596] Ubuntu combined MGT/MDT issue

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.15.0
• Labels: ubuntu
• Assignee: James A Simmons
• Reporter: Amir Shehata (Inactive)

Description

Testing on ubuntu 20.04 VM with a combined MGT/MDT, gives a "No space left on device" error when mounting

ashehata@lustre03:mgs$ mountmgs
mount.lustre: mount /dev/sdb at /mnt/mgs failed: No space left on device

Apr  8 21:24:00 lustre03 kernel: [  839.547863] LustreError: 1833:0:(fld_index.c:372:fld_index_init()) srv-lustrewt-MDT0000: Can't find "fld" obj -28
Apr  8 21:24:00 lustre03 kernel: [  839.548577] LustreError: 1833:0:(obd_config.c:775:class_setup()) setup lustrewt-MDT0000 failed (-28)
Apr  8 21:24:00 lustre03 kernel: [  839.549055] LustreError: 1833:0:(obd_config.c:2037:class_config_llog_handler()) MGC192.168.122.67@tcp: cfg command failed: rc = -28
Apr  8 21:24:00 lustre03 kernel: [  839.550340] Lustre:    cmd=cf003 0:lustrewt-MDT0000  1:lustrewt-MDT0000_UUID  2:0  3:lustrewt-MDT0000-mdtlov  4:f  
Apr  8 21:24:00 lustre03 kernel: [  839.550340] 
Apr  8 21:24:00 lustre03 kernel: [  839.550354] LustreError: 15c-8: MGC192.168.122.67@tcp: Confguration from log lustrewt-MDT0000 failed from MGS -28. Communication error between node & MGS, a bad configuration, or other errors. See syslog for more info
Apr  8 21:24:00 lustre03 kernel: [  839.551338] LustreError: 1791:0:(obd_mount_server.c:1423:server_start_targets()) failed to start server lustrewt-MDT0000: -28
Apr  8 21:24:00 lustre03 kernel: [  839.551849] LustreError: 1791:0:(obd_mount_server.c:2058:server_fill_super()) Unable to start targets: -28
Apr  8 21:24:00 lustre03 kernel: [  839.552493] LustreError: 1791:0:(obd_config.c:828:class_cleanup()) Device 5 not setup
Apr  8 21:24:06 lustre03 kernel: [  845.593726] Lustre: 1791:0:(client.c:2312:ptlrpc_expire_one_request()) @@@ Request sent has timed out for slow reply: [sent 1617917040/real 1617917040]  req@00000000984dbaa9 x1696508945630016/t0(0) o251->MGC192.168.122.67@tcp@0@lo:26/25 lens 224/224 e 0 to 1 dl 1617917046 ref 2 fl Rpc:XNQr/0/ffffffff rc 0/-1 job:''
Apr  8 21:24:06 lustre03 kernel: [  845.607482] Lustre: server umount lustrewt-MDT0000 complete
Apr  8 21:24:06 lustre03 kernel: [  845.607487] LustreError: 1791:0:(obd_mount.c:1760:lustre_fill_super()) Unable to mount  (-28)

Having a separate MGS seems to mount properly

Issue Links

• is related to: LU-14776 Ubuntu 20.04 HWE support