------- Comment From [email protected] 2017-09-25 14:49 EDT-------
Hi, I'll try to give a better explanation about what's happening:
1. Problem: After create multiple namespaces for a NVMe device, they are
being detected as mpath disks, which is not correct. The comment above
showed this behavior.
2. Solution: there are 2 upstream commits that solve this issue. (As
shown in the Bug Description)
The nvme devices are being blacklisted by default in multipath. You can
check that by: multipathd -k'show config' | grep nvme -B3
So, in order to reproduce the issue, one must insert the following in
/etc/multipath.conf:
blacklist_exceptions {
devnode "^nvme"
}
After applied those two patches, the issue was fixed:
Running 'multipath -v3 | grep uid_attribute'. (Now it uses ID_WWN
instead of ID_SERIAL for NVMe devices)
Sep 25 08:23:09 | nvme0n1: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n10: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n11: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n12: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n13: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n14: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n15: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n16: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n17: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n18: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n19: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n2: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n20: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n21: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n22: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n23: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n24: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n25: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n26: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n27: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n28: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n29: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n3: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n30: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n31: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n32: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n4: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n5: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n6: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n7: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n8: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme0n9: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | sdb: uid_attribute = ID_SERIAL (config file default)
Sep 25 08:23:09 | sdc: uid_attribute = ID_SERIAL (config file default)
Sep 25 08:23:09 | sdd: uid_attribute = ID_SERIAL (config file default)
Sep 25 08:23:09 | sde: uid_attribute = ID_SERIAL (config file default)
Sep 25 08:23:09 | sdf: uid_attribute = ID_SERIAL (config file default)
Sep 25 08:23:09 | sdg: uid_attribute = ID_SERIAL (config file default)
Sep 25 08:23:09 | sda: uid_attribute = ID_SERIAL (config file default)
Sep 25 08:23:09 | sdh: uid_attribute = ID_SERIAL (config file default)
Sep 25 08:23:09 | nvme1n1: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme2n1: uid_attribute = ID_WWN (controller setting)
Sep 25 08:23:09 | nvme3n1: uid_attribute = ID_WWN (controller setting)
And if I run 'multipath -ll' it shows nothing, since this machine does
not have any other multipath disk.
The patches will be attached next as well as the .debs of the multipath-
tools package after built. So, you guys can review and test it.
If there's anything else missing, please let us know.
Thanks,
Rodrigo
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https://bugs.launchpad.net/bugs/1711749
Title:
multipath-tools: Backport 2 patches to Ubuntu 17.10 (NVMe disks are
detected as multipath disks)
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