Monitors can use only exactly one IP address. ceph-deploy uses some heuristics
based on hostname resolution and ceph public addr configuration to guess which
one to use during setup. (Which I've always found to be a quite annoying feature.)
based on hostname resolution and ceph public addr configuration to guess which
one to use during setup. (Which I've always found to be a quite annoying feature.)
The mon's IP must be reachable from all ceph daemons and clients, so it should be
on your "public" network. Changing the IP of a mon is possible but annoying, it is
often easier to remove and then re-add with a new IP (if possible):
http://docs.ceph.com/docs/master/rados/operations/add-or-rm-mons/#changing-a-monitor-s-ip-address
http://docs.ceph.com/docs/master/rados/operations/add-or-rm-mons/#changing-a-monitor-s-ip-address
2018-05-10 12:36 GMT+02:00 Massimo Sgaravatto <massimo.sgaravatto@xxxxxxxxx>:
I have a ceph cluster that I manually deployed, and now I am trying to see if I can use ceph-deploy to deploy new nodes (in particular the object gw).The network configuration is the following:Each MON node has two network IP: one on a "management network" (not used for ceph related stuff) and one on a "public network",The MON daemon listens to on the pub networkEach OSD node has three network IPs: one on a "management network" (not used for ceph related stuff), one on a "public network" and the third one is an internal network to be used as ceph cluster network (for ceph internal traffic: replication, recovery, etc)Name resolution works, but names are resolved to the IP address of the management network.And it looks like this is a problem. E.g. the following command (used in ceph-deploy gatherkeys) issued on a MON host (c-mon-02) doesn't work:/usr/bin/ceph --verbose --connect-timeout=25 --cluster=ceph --name mon. --keyring=/var/lib/ceph/mon/ceph-c-mon-02/keyring auth get client.admin unless I change the name resolution of c-mon-02 to the public addressIs it a requirement (at least for ceph-deploy) that the name of each node of the ceph cluster must be resolved to the public IP address ?Thanks, Massimo
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Paul Emmerich
Looking for help with your Ceph cluster? Contact us at https://croit.io
croit GmbH
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Paul Emmerich
Looking for help with your Ceph cluster? Contact us at https://croit.io
croit GmbH
Freseniusstr. 31h
81247 München
www.croit.io
Tel: +49 89 1896585 90
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