Multipath Configuration

[lowerym]

Having issues with Multipath configuration.

I have A Dell Unity that im connecting to on 4 targets


But when i look at my Volume groups i get errors


I have the following in my /etc/multipath.conf
cat /etc/multipath.conf

defaults {
        polling_interval        2
        path_selector           "round-robin 0"
        path_grouping_policy    multibus
        rr_min_io               100
        failback                immediate
        no_path_retry           queue
        user_friendly_names     yes
}
blacklist  {
        wwid .*
}
blacklist_exceptions {
        wwid "3600601601e914e00d391266038b8e2f6"
    property "(ID_SCSI_VPD|ID_WWN|ID_SERIAL)"
}
multipaths {
  multipath  {
        wwid "3600601601e914e00d391266038b8e2f6"
        alias ElasticSearchSAN
  }
}

And im not sure if its related but all 4 of my targets have the same WWID. im not quiet sure how to resolve this .

 

[dcsapak]

what does multipath -ll say?

 

[lowerym]

what does multipath -ll say?

Nothing it comes back blank which i assume means its configured incorrect or has a bad filter?

 

[dcsapak]

did you already read https://pve.proxmox.com/wiki/ISCSI_Multipath ?

 

[lowerym]

Yes i have, but i still appear to be stuck. i think the issue might be the all 4 targets share the same wwid, but again the documentation seems straight forward but doesnt quiet work even when it appears to match up.

 

[dcsapak]

did you run

# multipath -a <WWID>

as well as

# systemctl restart multipath-tools.service

?

did you check if your san vendors has any additional multipath instructions for linux?

i think the issue might be the all 4 targets share the same wwid

no thats normal if it is only one disk (one disk = one wwid)

 

[lowerym]

Running Multipath -v3 i get the following wonder if this might be part of the issue? not in wwids file, skipping sde


===== paths list =====
uuid hcil dev dev_t pri dm_st chk_st vend/pro
362cea7f099dce7002850e7f79912a523 0:2:0:0 sda 8:0 1 undef undef DELL,PER
3600601601e914e00d391266038b8e2f6 15:0:0:0 sdb 8:16 50 undef undef DGC,VRAI
3600601601e914e00d391266038b8e2f6 16:0:0:0 sdc 8:32 10 undef undef DGC,VRAI
3600601601e914e00d391266038b8e2f6 17:0:0:0 sdd 8:48 50 undef undef DGC,VRAI
3600601601e914e00d391266038b8e2f6 18:0:0:0 sde 8:64 10 undef undef DGC,VRAI
Jul 14 10:29:31 | libdevmapper version 1.02.155 (2018-12-18)
Jul 14 10:29:31 | DM multipath kernel driver v1.13.0
Jul 14 10:29:31 | sda: udev property ID_WWN whitelisted
Jul 14 10:29:31 | sda: wwid 362cea7f099dce7002850e7f79912a523 blacklisted
Jul 14 10:29:31 | sda: orphan path, blacklisted
Jul 14 10:29:31 | const prioritizer refcount 1
Jul 14 10:29:31 | sdb: udev property ID_WWN whitelisted
Jul 14 10:29:31 | sdb: wwid 3600601601e914e00d391266038b8e2f6 whitelisted
Jul 14 10:29:31 | wwid 3600601601e914e00d391266038b8e2f6 not in wwids file, skipping sdb
Jul 14 10:29:31 | sdb: orphan path, only one path
Jul 14 10:29:31 | sysfs prioritizer refcount 4
Jul 14 10:29:31 | sdc: udev property ID_WWN whitelisted
Jul 14 10:29:31 | sdc: wwid 3600601601e914e00d391266038b8e2f6 whitelisted
Jul 14 10:29:31 | wwid 3600601601e914e00d391266038b8e2f6 not in wwids file, skipping sdc
Jul 14 10:29:31 | sdc: orphan path, only one path
Jul 14 10:29:31 | sysfs prioritizer refcount 3
Jul 14 10:29:31 | sdd: udev property ID_WWN whitelisted
Jul 14 10:29:31 | sdd: wwid 3600601601e914e00d391266038b8e2f6 whitelisted
Jul 14 10:29:31 | wwid 3600601601e914e00d391266038b8e2f6 not in wwids file, skipping sdd
Jul 14 10:29:31 | sdd: orphan path, only one path
Jul 14 10:29:31 | sysfs prioritizer refcount 2
Jul 14 10:29:31 | sde: udev property ID_WWN whitelisted
Jul 14 10:29:31 | sde: wwid 3600601601e914e00d391266038b8e2f6 whitelisted
Jul 14 10:29:31 | wwid 3600601601e914e00d391266038b8e2f6 not in wwids file, skipping sde
Jul 14 10:29:31 | sde: orphan path, only one path
Jul 14 10:29:31 | sysfs prioritizer refcount 1
Jul 14 10:29:31 | unloading sysfs prioritizer
Jul 14 10:29:31 | unloading const prioritizer
Jul 14 10:29:31 | unloading tur checker

 

[lowerym]

i found the issue. the file for wwid did not have th leading and trailing / /