Hello, I'm upgrading some environments from 4.3 to 4.4. Storage domains are iSCSI based, connected to an Equallogic storage array (PS-6510ES), that is recognized such as this as vendor/product in relation to multipath configuration
# cat /proc/scsi/scsi Attached devices: Host: scsi0 Channel: 02 Id: 00 Lun: 00 Vendor: DELL Model: PERC H730 Mini Rev: 4.30 Type: Direct-Access ANSI SCSI revision: 05 Host: scsi15 Channel: 00 Id: 00 Lun: 00 Vendor: EQLOGIC Model: 100E-00 Rev: 8.1 Type: Direct-Access ANSI SCSI revision: 05 Host: scsi16 Channel: 00 Id: 00 Lun: 00 Vendor: EQLOGIC Model: 100E-00 Rev: 8.1 Type: Direct-Access ANSI SCSI revision: 05 Host: scsi17 Channel: 00 Id: 00 Lun: 00 Vendor: EQLOGIC Model: 100E-00 Rev: 8.1 Type: Direct-Access ANSI SCSI revision: 05 Host: scsi18 Channel: 00 Id: 00 Lun: 00 Vendor: EQLOGIC Model: 100E-00 Rev: 8.1 Type: Direct-Access ANSI SCSI revision: 05 # Passing from 4.3 to 4.4 implies passing from CentOS 7 to 8. The vendor is not in multipath "database" (it wasn't in 6 and 7 too) In 7 I used this snip to get no_path_retry set: # VDSM REVISION 1.5 # VDSM PRIVATE defaults { . . . no_path_retry 4 . . . } . . . devices { device { # These settings overrides built-in devices settings. It does # not apply to devices without built-in settings (these use the # settings in the "defaults" section), or to devices defined in # the "devices" section. all_devs yes no_path_retry 4 } device { vendor "EQLOGIC" product "100E-00" path_selector "round-robin 0" path_grouping_policy multibus path_checker tur rr_min_io_rq 10 rr_weight priorities failback immediate features "0" } } and confirmation of applied config with # multipath -l 36090a0c8d04f21111fc4251c7c08d0a3 dm-14 EQLOGIC ,100E-00 size=2.4T features='1 queue_if_no_path' hwhandler='0' wp=rw `-+- policy='round-robin 0' prio=0 status=active |- 16:0:0:0 sdc 8:32 active undef running `- 18:0:0:0 sde 8:64 active undef running 36090a0d88034667163b315f8c906b0ac dm-13 EQLOGIC ,100E-00 size=2.0T features='1 queue_if_no_path' hwhandler='0' wp=rw `-+- policy='round-robin 0' prio=0 status=active |- 15:0:0:0 sdb 8:16 active undef running `- 17:0:0:0 sdd 8:48 active undef running and # multipath -r -v3 | grep no_path_retry Jan 29 11:51:17 | 36090a0d88034667163b315f8c906b0ac: no_path_retry = 4 (config file default) Jan 29 11:51:17 | 36090a0c8d04f21111fc4251c7c08d0a3: no_path_retry = 4 (config file default) In 8 I get this; see also the strange line about vendor or product missing, but it is not true... # multipath -l Jan 29 11:52:02 | device config in /etc/multipath.conf missing vendor or product parameter 36090a0c8d04f21111fc4251c7c08d0a3 dm-13 EQLOGIC,100E-00 size=2.4T features='1 queue_if_no_path' hwhandler='1 alua' wp=rw `-+- policy='round-robin 0' prio=0 status=active |- 16:0:0:0 sdc 8:32 active undef running `- 18:0:0:0 sde 8:64 active undef running 36090a0d88034667163b315f8c906b0ac dm-12 EQLOGIC,100E-00 size=2.0T features='1 queue_if_no_path' hwhandler='1 alua' wp=rw `-+- policy='round-robin 0' prio=0 status=active |- 15:0:0:0 sdb 8:16 active undef running `- 17:0:0:0 sdd 8:48 active undef running # multipath -r -v3 | grep no_path_retry Jan 29 11:53:54 | device config in /etc/multipath.conf missing vendor or product parameter Jan 29 11:53:54 | set open fds limit to 8192/262144 Jan 29 11:53:54 | loading /lib64/multipath/libchecktur.so checker Jan 29 11:53:54 | checker tur: message table size = 3 Jan 29 11:53:54 | loading /lib64/multipath/libprioconst.so prioritizer Jan 29 11:53:54 | foreign library "nvme" loaded successfully Jan 29 11:53:54 | delegating command to multipathd So in my opinion it is currently using queue if no path in 8 Can anyone give me any insight about the message and about how to force the no_path_retry? Perhaps any major change in multipath from 7 to 8? The 8 config is this one: # VDSM REVISION 2.0 # VDSM PRIVATE defaults { . . . polling_interval 5 . . . # We use a small number of retries to protect from short outage. # Assuming the default polling_interval (5 seconds), this gives # extra 20 seconds grace time before failing the I/O. no_path_retry 16 . . . } # Blacklist internal disk blacklist { wwid "36d09466029914f0021e89c5710e256be" } # Remove devices entries when overrides section is available. devices { device { # These settings overrides built-in devices settings. It does # not apply to devices without built-in settings (these use the # settings in the "defaults" section), or to devices defined in # the "devices" section. #### Not valid any more in RH EL 8.3 #### all_devs yes #### no_path_retry 16 } device { vendor "EQLOGIC" product "100E-00" path_selector "round-robin 0" path_grouping_policy multibus path_checker tur rr_min_io_rq 10 rr_weight priorities failback immediate features "0" } } Thanks in advance, Gianluca
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