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Bug #21204
closedDNS SRV default service name not used anymore
Status:
Resolved
Priority:
Normal
Assignee:
-
Category:
Administration/Usability
Target version:
-
% Done:
0%
Source:
Tags:
Backport:
luminous
Regression:
Yes
Severity:
4 - irritation
Reviewed:
Affected Versions:
ceph-qa-suite:
Component(RADOS):
Monitor
Pull request ID:
Crash signature (v1):
Crash signature (v2):
Description
Hi,
I am in the process of upgrading from Kraken to Luminous.
I am using DNS SRV records to lookup MON servers.
I've started by upgrading my ceph admin node (ceph-deploy) and I get this error after upgrading:
# ceph status
2017-08-31 15:57:24.811639 7f67164ab700 -1 WARNING: the following dangerous and experimental features are enabled: btrfs
2017-08-31 15:57:24.889154 7f67164ab700 -1 WARNING: the following dangerous and experimental features are enabled: btrfs
unable to get monitor info from DNS SRV with service name: ceph-mon
no monitors specified to connect to.
2017-08-31 15:57:24.892900 7f67164ab700 -1 failed for service _._tcp
[errno 2] error connecting to the cluster
tcpdump output is when executing 'ceph status' command:
15:57:24.889523 IP 192.168.16.194.38469 > 192.168.16.2.domain: 28989+ SRV? _._tcp. (24)
15:57:24.892233 IP 192.168.16.2.domain > 192.168.16.194.38469: 28989 NXDomain 0/1/0 (99)
15:57:24.892364 IP 192.168.16.194.42709 > 192.168.16.2.domain: 35339+ SRV? _._tcp.<DOMAIN>. (34)
15:57:24.892816 IP 192.168.16.2.domain > 192.168.16.194.42709: 35339 NXDomain* 0/1/0 (90)
As you can see, ceph is looking for _._tcp.<DOMAIN>. SRV record, instead of _ceph-mon._tcp.<DOMAIN>.
The issue was fixed by forcing service name in ceph.conf to its default value:
mon_dns_srv_name = ceph-mon
But it was working fine in kraken.
Regards.
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