Created attachment 382762 [details, diff] populate udev db manually with scsi_id multipath-tools-0.5 and above has switched the way it queries for ID_SERIAL from storage devices, so that instead of forking a call to id_scsi it depends uses the API from libudev. This is generally fine, except that libudev will not return the relevant information without 60*storage.rules having been processed (and the udev database at /run/udev/data populated as a result), and that requires udevd to be running before multipath-tools attempts to query. There are three solutions to this: #1 - force multipath-tools to use the deprecated method (forking a call to id_scsi) with a hacky, unstable override in multipath.conf #2 - integrate udev as the device handler for genkernel initramfs, and require it to be used if multipath is requested #3 - populate /run/udev/data manually using 'scsi_id'. Option 1 seems difficult to do and may be removed by upstream at any time. Option 2 is probably the best overall, but is non-trivial. IIRC there is already a feature request for udevd integration into genkernel. Option 3 is surprisingly trivial, due to the fact that the /run/udev/data population seems to be verbatum output from 'scsi_id --export' (indeed, that's what the relevant portions of 60*storage.rules is doing). I have attached a patch which provides this capability, that can be used until such time as proper udevd integration is added to genkernel initramfs. Note that I have tested it locally but am still awaiting results of a production test from Chainsaw.
hi, genkernel works good, but not in early boot (initrd), so for non root filesystem its ok. For root fs on multipath you have to have udev in initrd, so there is another way to resolve your issue: 1. unmerge genkernel 2. apply simple patch I prepared for genkernel-next-60 (attached). genkernel-next has udev integration already, but try to add not neded mpath* files. 3. merge genkernel-next It works for me. multipath-tool-0.5.0-r1 patched sys-kernel/genkernel-next-60 IBM storage via four fc paths. SAN boot, root-fs on lvm on SAN-storage. j
Created attachment 395354 [details, diff] genkernel-next-60 patch for multipath-tools-0.5.0-r1
[master 5276cd7] defaults/initrd.scripts: bug #519742, fix multipath detection. 1 file changed, 6 insertions(+)
