Re: ceph-deploy best practices

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@Alfredo - Is this something that ceph-deploy should do // or warn about? or should we fix ceph-disk so that it set's the part guid on existing partations?


On Mon, Dec 9, 2013 at 9:44 AM, Matthew Walster <matthew@xxxxxxxxxxx> wrote:
On 9 December 2013 17:35, Andrew Woodward <xarses@xxxxxxxxx> wrote:
https://github.com/ceph/ceph/blob/master/udev/95-ceph-osd.rules Lists the 4 variants, in your case it sounds like a normal ceph volume so the guid you want is probably 4fbd7e29-9d25-41b8-afd0-062c0ceff05d.

You will need sgdisk to set the guid correctly (part of gdisk)

from man
       -t, --typecode=partnum:{hexcode|GUID}
              Change a single partition's type code. You enter the  type  code
              using  either  a  two-byte hexadecimal number, as described ear‐
              lier,   or   a   fully-specified    GUID    value,    such    as
              EBD0A0A2-B9E5-4433-87C0-68B6B72699C7.

your exec should look like

sgdisk --typecode=4:4fbd7e29-9d25-41b8-afd0-062c0ceff05d /dev/sda

Wow! That's well hidden!

I've only had a cursory look at ceph-deploy's underlying code -- is this a feature missing from there, or is there a reason it's left out of the "osd prepare" phase?

It would be good to either document this on the ceph-deploy quickstart page or incorporate it into ceph-deploy. I can confirm sgdisk is in the path on login.

Matthew

​​



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