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Understanding the storage path failover sequence in VMware ESXi native multipathing(Article ID: 321364)
[증상]
iSCSI 환경에서 MPIO Failover가 정상적으로 되지 않는 이슈
[원인]
로그 분석 결과, 테스트 진행하신 시간대에 Network Connection은 에러나 특이사항 없이 정상적으로
Failover 된 것으로 보입니다. 겪으셨던 약 30~40초간의 I/O 불가는 호스트가 Connection Lost를 인지하고
Path Claim Retry 및 Timeout에 도달하기까지 걸린 시간이 대부분이며, 완전히 iSCSI Connection Offline이
확인된 이후, 새로운 Path로 Failover 되는데 걸린 시간은 약 1초 정도로 보입니다.
[Plan]
이는 정상적인 Expected Behavior로 보여지며, 만약 Timeout 및 Retry를 변경하시고 싶으시다면, vSphere UI를
통하여 iSCSI Protocol에 대한 옵션값을 변경하여 증상이 개선되는지 확인 부탁드립니다.
다만, Retry 및 Timeout을 과도하게 변경하신다면, 단시간의 Connection Lost 상황에도
Failover가 발생할 수 있는 점 유의해주시기 바랍니다.
[상세로그]
2023-04-27T02:13:50.303Z In(182) vmkernel: cpu9:2100756 opID=63b8630c)World: 12128: VC opID esxcli-69-f757 maps to vmkernel opID 63b8630c
2023-04-27T02:13:50.303Z In(182) vmkernel: cpu9:2100756 opID=63b8630c)netschedHClk: NetSchedHClkNotify:4686: vmnic4: link down notification
2023-04-27T02:13:50.303Z In(182) vmkernel: cpu9:2100756 opID=63b8630c)Uplink: 18284: Setting link down on physical adapter vmnic4.
2023-04-27T02:13:50.303Z In(182) vmkernel: cpu11:2097388)bnxtnet: bnxtnet_linkstatus_set:2712: [vmnic4 : 0x452090358000] Taking down link
2023-04-27T02:13:50.303Z In(182) vmkernel: cpu11:2097388)netschedHClk: NetSchedHClkNotify:4686: vmnic4: link down notification
2023-04-27T02:14:05.843Z In(182) vmkernel: cpu19:2097301)StorageTaskMgmt: 349: need to start new DeviceTaskMgmt HandlerWorld current worlds 0
2023-04-27T02:14:05.843Z In(182) vmkernel: cpu19:2097301)StorageTaskMgmt: 212: Creating new taskmgmt-handler world DeviceTaskmgmtHandler
2023-04-27T02:14:05.844Z In(182) vmkernel: cpu11:2109029)StorageTaskMgmt: 100: Starting taskmgmt handler world 2109029/2
2023-04-27T02:14:33.502Z Wa(180) vmkwarning: cpu48:2097610)WARNING: iscsi_vmk: iscsivmk_TaskMgmtHandle:1369: vmhba64:CH:3 T:0 L:0: Task management (abort) failed after 3 retries. Closing connection.
2023-04-27T02:14:33.502Z Wa(180) vmkwarning: cpu36:2097838)WARNING: iscsi_vmk: iscsivmk_StopConnection:735: vmhba64:CH:3 T:0 CN:0: iSCSI connection is being marked "OFFLINE" (Event:6)
2023-04-27T02:14:33.502Z Wa(180) vmkwarning: cpu36:2097838)WARNING: iscsi_vmk: iscsivmk_StopConnection:739: Sess [ISID: 00023d000004 TARGET: iqn.2007-11.com.nimblestorage:alletra6030-group-g3157079e219cd9f6 TPGT: 99d TSIH: 0]
2023-04-27T02:14:33.502Z Wa(180) vmkwarning: cpu36:2097838)WARNING: iscsi_vmk: iscsivmk_StopConnection:740: Conn [CID: 0 L: 192.168.115.91:58354 R: 192.168.115.80:3260]반응형