Out of curiosity, how DNS lookup [1] works with v2 only mons? Since we can’t 
specify whether the port is v1 or v2 in SRV records. Or it just works if I 
specify 3300 port in SRV records?

[1]: https://docs.ceph.com/en/latest/rados/configuration/mon-lookup-dns/

在 2020年12月9日,18:10,Wido den Hollander <w...@42on.com> 写道:

On 08/12/2020 20:17, Wesley Dillingham wrote:
We rebuilt all of our mons in one cluster such that they bind only to port 3300 
with msgrv2. Previous to this we were binding to both 6789 and 3300. All of our 
server and client components are sufficiently new (14.2.x) and we haven’t 
observed any disruption but I am inquiring if this may be problematic for any 
unforeseen reason. We don’t intend to have any older clients connecting. 
https://docs.ceph.com/en/latest/rados/configuration/msgr2/ doesn’t mention much 
about running with only v2 so I just want to make sure we aren’t setting 
ourselves up for trouble. Thanks.

No, not really. I have a couple of those servers as well where v1 was disabled 
completely.

Wido

--
Respectfully,
Wes Dillingham
Site Reliability Engineer IV
Storage Engineering / Ceph
wdillingham(at)godaddy.com
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