Proxmox VE iSCSI strange log on Synology Storage

[juniper]

Hi,

i have a cluster of 5 server connected (iSCSI) with a Synology RS3617xs+ (10GBE interface);

all seems working fine but on Synology i have some strange log:

continuous:

2018-01-31T18:39:33+01:00 mksyn kernel: iscsi_target_parameters.c:44:iscsi_login_rx_data rx_data returned 0, expecting 48.
2018-01-31T18:39:35+01:00 mksyn kernel: iscsi_target_parameters.c:44:iscsi_login_rx_data rx_data returned 0, expecting 48.
2018-01-31T18:39:35+01:00 mksyn kernel: iscsi_target_parameters.c:44:iscsi_login_rx_data rx_data returned 0, expecting 48.
2018-01-31T18:40:05+01:00 mksyn kernel: SYSTEM:    Last message 'iscsi_target_paramet' repeated 15 times, suppressed by syslog-ng on mksyn
2018-01-31T18:40:05+01:00 mksyn kernel: iscsi_target_parameters.c:44:iscsi_login_rx_data rx_data returned 0, expecting 48.
2018-01-31T18:40:05+01:00 mksyn kernel: iscsi_target_parameters.c:44:iscsi_login_rx_data rx_data returned 0, expecting 48.
2018-01-31T18:40:09+01:00 mksyn kernel: iscsi_target_parameters.c:44:iscsi_login_rx_data rx_data returned 0, expecting 48.

and 

2018-01-31T18:42:55+01:00 mksyn kernel: [121563.213710] iSCSI_F:iscsi_target_login.c:1213:iscsi_target_login_sess_out iSCSI Login negotiation failed - I[10.10.200.153:48182], T[]
2018-01-31T18:42:58+01:00 mksyn kernel: [121566.126965] iSCSI_F:iscsi_target_login.c:1213:iscsi_target_login_sess_out iSCSI Login negotiation failed - I[10.10.200.154:34932], T[]
2018-01-31T18:42:59+01:00 mksyn kernel: [121567.084450] iSCSI_F:iscsi_target_login.c:1213:iscsi_target_login_sess_out iSCSI Login negotiation failed - I[10.10.200.151:43236], T[]
2018-01-31T18:43:03+01:00 mksyn kernel: [121570.732065] iSCSI_F:iscsi_target_login.c:1213:iscsi_target_login_sess_out iSCSI Login negotiation failed - I[10.10.200.150:51542], T[]
2018-01-31T18:43:05+01:00 mksyn kernel: [121573.008544] iSCSI_F:iscsi_target_login.c:1213:iscsi_target_login_sess_out iSCSI Login negotiation failed - I[10.10.200.152:42280], T[]
2018-01-31T18:43:05+01:00 mksyn kernel: [121573.342183] iSCSI_F:iscsi_target_login.c:1213:iscsi_target_login_sess_out iSCSI Login negotiation failed - I[10.10.200.153:48186], T[]

Do you have some hints about? I contacted Synology Support but without any results...

[The Lee-Man]

Are you using CHAP? Is it set up correctly? If you are using CHAP I suggest disabling it (on both sides) and trying again?

The "Login negotiation failed" message looks customized but is coming from iscsi_target_login_sess_out(), which is only called when a login fails. That's likely because the login is failing to read the ISCSI header (which is 48 bytes), as noted by the "rx_data return 0, expecting 48" message. So the login is failing at the initial ISCSI Header phase.

Has something occurred, like systems or the target rebooting?


 

[Franz Angeli]

No I don't use authentication at all and all works fine, I have only tons of this logs.. 

Tomorrow I'll try to trace some sessions (tcpdump) trying to debug what happens. 

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[juniper]

is possible that "TARGET_THREAD_SET_COUNT" set to 4 by module is too low considering i have 5 cluster node accessing to Synology Storage?

[The Lee-Man]

On Friday, February 2, 2018 at 12:21:16 AM UTC-8, juniper wrote:

is possible that "TARGET_THREAD_SET_COUNT" set to 4 by module is too low considering i have 5 cluster node accessing to Synology Storage?

Please feel free to try increasing that number -- I have no idea if it will help or not -- but I suspect that isn't the issue.