ceph-disk: support lvm2 volumes #13994
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Signed-off-by: Gunwoo Gim (a.k.a. Nicho1as) <wind8702@gmail.com>
liewegas
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I'm afraid I have to say I just found out after rebooting two osd nodes that the osds don't get up and running by the udev rules in /lib/udev/rules.d/95-ceph-osd.rules; I had to run the command myself:
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I made the second commit a couple of hours ago with error and then I just now forced an update of the second commit for the sake of concise git log. now the problem of the udev rule not being triggered when a ceph-osd lvm2 partition is added to the system is fixed. but the fix I just uploaded is very naive; please check out the message of the commit: 8bc6d83 |
The lvm2 partitions don't come with the environtment variable 'DEVTYPE'
set to 'partition'; it instead comes with the variable set to 'disk'.
So this makeshift patch makes the udev rule less strict stopping it from
checking ENV{DEVTYPE}.
I believe this is a very naive approach and a preferable solution is
making the lvm2 partitions come with 'DEVTYPE' set correctly.
Signed-off-by: Gunwoo Gim (a.k.a. Nicho1as) <wind8702@gmail.com>
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Needs rebase |
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would you be so kind as to add integration tests as well to demonstrate it works as expected ? See qa/workunits/ceph-disk. And let me know if you need help with it ;) |
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hey @wind0204 we are going to have a separate tool for deploying OSDs from LVM volumes, ceph-disk is not going to support this. The documentation is at http://docs.ceph.com/ceph-lvm/master/index.html and we should have a release in the next few months. Let us know if you have any ideas/feedback. Thank you! |
Hi, it's very naive and simple implementation; hope a ceph developer will polish it up a bit.
I still need to do a 'partprobe' and a 'udevadm trigger' on every boot-up so that 1) the device-mapped virtual block devices for the lvm partitions show up and 2) the udev rule populates the directory /dev/disk/by-partuuid which is used by the symbolic link of the filestore journal prepared by ceph-disk.
a related mailing list thread : https://www.mail-archive.com/ceph-users@lists.ceph.com/msg36362.html
Signed-off-by: Gunwoo Gim (a.k.a. Nicho1as) wind8702@gmail.com