Bug 2084365
| Summary: | [RFE] enable device configuration selection to include the transport protocol. | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 9 | Reporter: | Ben Marzinski <bmarzins> |
| Component: | device-mapper-multipath | Assignee: | Ben Marzinski <bmarzins> |
| Status: | CLOSED ERRATA | QA Contact: | Lin Li <lilin> |
| Severity: | medium | Docs Contact: | Kristina Slaveykova <kslaveyk> |
| Priority: | medium | ||
| Version: | 9.0 | CC: | agk, bmarzins, heinzm, jmagrini, kslaveyk, ldigby, lilin, msnitzer, nyewale, prajnoha, rmadhuso, zkabelac |
| Target Milestone: | rc | Keywords: | FutureFeature, Triaged |
| Target Release: | 9.1 | Flags: | pm-rhel:
mirror+
|
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | device-mapper-multipath-0.8.7-9.el9 | Doc Type: | Enhancement |
| Doc Text: |
.Enabled protocol specific configuration of multipath device paths
Previously due to different optimal configurations for the different protocols, it was impossible to set the configuration correctly without setting an option for each individual protocol. With this enhancement, users can now configure multipath device paths based on their path transport protocol. Use the `protocol` subsection of the `overrides` section in the `/etc/multipath.conf` file to correctly configure multipath device paths, based on their protocol.
|
Story Points: | --- |
| Clone Of: | 2065477 | Environment: | |
| Last Closed: | 2022-11-15 11:16:24 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2065477 | ||
| Bug Blocks: | |||
[root@storageqe-05 ~]# rpm -qa | grep multipath
device-mapper-multipath-libs-0.8.7-9.el9.x86_64
device-mapper-multipath-0.8.7-9.el9.x86_64
[root@storageqe-05 ~]# man multipath.conf
protocol subsection
The protocol subsection recognizes the following mandatory attribute:
type The protocol string of the path device. The possible values are scsi:fcp, scsi:spi, scsi:ssa, scsi:sbp, scsi:srp,
scsi:iscsi, scsi:sas, scsi:adt, scsi:ata, scsi:unspec, ccw, cciss, nvme, and undef. This is not a regular expression. the
path device protcol string must match exactly. The protocol that a path is using can be viewed by running multipathd show
paths format "%d %P"
The following attributes are optional; if not set, the default values are taken from the overrides, devices, or defaults section:
fast_io_fail_tmo
dev_loss_tmo
eh_deadline
[root@storageqe-05 ~]# multipathd show paths format "%d %P"
dev protocol
sda scsi:unspec
sdj scsi:fcp
sdk scsi:fcp
sdl scsi:fcp
sdm scsi:fcp
sdn scsi:fcp
sdo scsi:fcp
sdp scsi:fcp
sdq scsi:fcp
sdb scsi:fcp
sdc scsi:fcp
sdd scsi:fcp
sde scsi:fcp
sdf scsi:fcp
sdg scsi:fcp
sdh scsi:fcp
sdi scsi:fcp
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (device-mapper-multipath bug fix and enhancement update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2022:8313 |
The final solution to to is to add a protocol subsection to the overrides section of multipath.conf, which can contain multiple protocol subsections. Path devices are matched against the protocol subsection using the mandatory "type" attribute. Attributes in a matching protocol subsection take precedence over attributes in the rest of the overrides section, which like always take precedence of attributes in the devices and defaults sections. If there are multiple matching protocol subsections, later entries take precedence. The "type" attribute can be one of scsi:fcp, scsi:spi, scsi:ssa, scsi:sbp, scsi:srp, scsi:iscsi, scsi:sas, scsi:adt, scsi:ata, scsi:unspec, ccw, cciss, nvme, and undef. The protocol that a path is using can be viewed by running: multipathd show paths format "%d %P" The only attributes that can be set in the protocol subsection are "type", "dev_loss_tmo", "fast_io_fail_tmo", and "eh_deadline". Here is an example of a overrides sections with protocol subsections: overrides { protocol { type "scsi:fcp" dev_loss_tmo 70 fast_io_fail_tmo 10 eh_deadline 360 } protocol { type "scsi:iscsi" fast_io_fail 120 } }