Ceph

The algorithm appears to be

1) if 'devs' is not defined, look for 'btrfs devs'; if that's defined, use those for the
devs to create filesystems on (otherwise, complain 'no devs defined for <name>":

Then, assuming there are devs defined:

2) if 'osd mkfs type' is not defined, look for 'btrfs devs', and if that's defined, use
those devs and set fs_type to btrfs. Otherwise, complain "No filesystem type defined!"

Your text above appears to have been wrapped oddly, but from what I can see, I would have
expected some of those cases to work?...

ok, looks like my conf settings got munged.
let's try this again
i was trying to get the mkcephfs to create a default btrfs filesystem (as documented) by not specifying any fs. this did not work at all.

This one I left no entry after "osd mkfs type =", and commented out all options:

[osd.2]
host = burnupi41
osd data = /var/lib/ceph/osd/ceph-2
devs = /dev/sdd1
osd mkfs type =

1. osd mkfs options btrfs =
2. osd mount options btrfs =

on osd.11, i just left all the entries blank, but left in the options fstype, btrfs:

[osd.11]
host = burnupi42
osd data = /var/lib/ceph/osd/ceph-11
devs = /dev/sde1
osd mkfs type =
osd mkfs options btrfs =
osd mount options btrfs =

on osd.16, i left all lines blank, but took out the options fstype:

[osd.16]
host = burnupi43
osd data = /var/lib/ceph/osd/ceph-16
devs = /dev/sdb1
osd mkfs type =
osd mkfs options =
osd mount options =

on osd.27, I commented out all the type and options lines....

[osd.27]
host = burnupi44
osd data = /var/lib/ceph/osd/ceph-27
devs = /dev/sde1

1. osd mkfs type = btrfs
2. osd mkfs options btrfs =
3. osd mount options btrfs =

anywhere i inserted a hash "#", this lovely program made them into numbered columns, so if you see a block with

x
y
z
1. x
2. y

you should replace the 1 and the 2 with "#" instead.

sigh...
stupid munging code....