About ceph.conf

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Hi Wei,

On Tue, 6 May 2014, Cao, Buddy wrote:
> According to the change of ceph-deploy from mkcephfs, I feel ceph.conf 
> is not a recommended way to manage ceph configuration. Is it true? If 
> so, how do I get the configurations previous configured in ceph.conf? 
> e.g., data drive, journal drive, [osd] conf, etc.

ceph.conf is still the right way to set many configuration options.  The 
only things it is not recommended for are

 - enumerating which daemons exist
 - configuring data, journal, and keyring paths

In both cases, the preferred method is to enumerate OSDs, Monitors, etc in 
/var/lib/ceph/{osd,mon,mds}/ directories.  The locations can be indicated 
with symlinks.  This makes it easy to find ceph data on any node, 
regardless of which filesystem is being used.  The new style ceph-disk 
utilities which do the OSD partitioning and fs creation steps rely on 
this.

sage



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