Private is only for OSDs. Nothing else communicates on that. MONs, MGRs,
MDSs, RGWs, and clients all communicate on the public network. Even OSDs
need to communicate with MONs on the public network.
All of that said, it is generally considered useless to split your private
and public subnets. Even on very large clusters there is very little
difference in modern ceph. Definitely not worth the complexity of multiple
switches, multiple VLANs maybe.
On Tue, Aug 21, 2018, 3:34 AM Janne Johansson wrote:
> Den tis 21 aug. 2018 kl 09:31 skrev Nino Bosteels <
> n.boste...@proximedia.be>:
>
>>
>> * Does ceph interpret multiple values for this in the ceph.conf (I
>> wouldn’t say so out of my tests)?
>>
>> * Shouldn’t public network be your internet facing range and cluster
>> network the private range?
>>
>
> "Public" doesn't necessarily mean "reachable from internet", it means
> "where ceph consumers and clients can talk", and the private network is
> "where only OSDs and ceph infrastructure can talk to eachother".
>
> Ceph clients can still be non-reachable from the internet, it's not the
> same meaning that firewall vendors place on "private" and "public".
>
> --
> May the most significant bit of your life be positive.
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