The private network is only used by OSD daemons. The mons, mds, rgw, and clients do not need access to this subnet. Ceph does not need DNS for anything. DNS is very helpful when managing your cluster, so it is helpful to configure it for the public network. As nothing talks to the private subnet, there is no benefit to configuring DNS for it.
On Sat, May 20, 2017, 7:52 AM Anton Dmitriev <tech@xxxxxxxxxx> wrote:
What is the true way of configuring DNS records for ceph?
public network = 10.17.12.0/24
cluster network = 10.17.27.0/24
Storages have separate interfaces for public and cluster networks.
In DNS servers I added records such as storage01 pointing to IPs in
public network.
Do I need to add extra records which will point to cluster network?
Do I need to add records to /etc/hosts file on storages to make storages
resolve each other to cluster network addresses?
Or maybe I don`t need to care about cluster network and ceph will
determine cluster network addresses himself without asking DNS and
/etc/hosts?
Do monitors interact with OSD using public network?
Do I need to add cluster network to monitors?
--
Dmitriev Anton
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