Hi,
Well, I've just reacted to all the text at the beginning of
http://docs.ceph.com/docs/luminous/rados/operations/add-or-rm-mons/#changing-a-monitor-s-ip-address-the-messy-way
including the title "the messy way". If the cluster is clean I see no
reason for doing brain surgery on monmaps
just to "save" a few minutes of redoing correctly from scratch.
with that I would agree. Careful planning and an installation
following the docs should be first priority. But I would also
encourage users to experiment with ceph before going into production.
Dealing with failures and outages on a production cluster causes much
more headache than on a test cluster. ;-)
If the cluster is empty anyway, I would also rather reinstall it, it
doesn't take that much time. I just wanted to point out that there is
a way that worked for me, although that was only a test cluster.
Regards,
Eugen
Zitat von Janne Johansson <icepic.dz@xxxxxxxxx>:
Den mån 25 feb. 2019 kl 13:40 skrev Eugen Block <eblock@xxxxxx>:
I just moved a (virtual lab) cluster to a different network, it worked
like a charm.
In an offline method - you need to:
- set osd noout, ensure there are no OSDs up
- Change the MONs IP, See the bottom of [1] "CHANGING A MONITOR’S IP
ADDRESS", MONs are the only ones really
sticky with the IP
- Ensure ceph.conf has the new MON IPs and network IPs
- Start MONs with new monmap, then start OSDs
> No, certain ips will be visible in the databases, and those will
not change.
I'm not sure where old IPs will be still visible, could you clarify
that, please?
Well, I've just reacted to all the text at the beginning of
http://docs.ceph.com/docs/luminous/rados/operations/add-or-rm-mons/#changing-a-monitor-s-ip-address-the-messy-way
including the title "the messy way". If the cluster is clean I see no
reason for doing brain surgery on monmaps
just to "save" a few minutes of redoing correctly from scratch. What
if you miss some part, some command gives you an error
you really aren't comfortable with, something doesn't really feel
right after doing it, then the whole lifetime of that cluster
will be followed by a small nagging feeling that it might have been
that time you followed a guide that tries to talk you out of
doing it that way, for a cluster with no data.
I think that is the wrong way to learn how to run clusters.
--
May the most significant bit of your life be positive.
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