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Hi,
we have recently started installing Ubuntu 12.04 Server. We are using
puppet and noticed some very odd behaviour on 12.04. When running puppet
on 12.04 the run is very slow when querying our BIND DNS servers. The
BIND DNS servers are setup as forwarders to our Windows 2008R2 Servers.
running tcpdump shows that puppet is trying to query AAAA records
without the fullyqualified domain name. For some reason this has a huge
impact, as the BIND servers don't respond to the client and so the
clients runs in a timeout.
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
10:46:40.740415 IP 172.28.19.52.34257 > gedapvl01.a.space.corp.domain: 64350+
PTR? 0.0.0.0.in-addr.arpa. (38)
10:46:40.740699 IP 172.28.19.52.46768 > gedapvl01.a.space.corp.domain: 15589+
PTR? 11.16.28.172.in-addr.arpa. (43)
10:46:40.741133 IP 172.28.19.52.33600 > gedapvl01.a.space.corp.domain: 19407+
PTR? 52.19.28.172.in-addr.arpa. (43)
10:46:40.849382 IP 172.28.19.52.60961 > gedapvl01.a.space.corp.domain: 39593+
AAAA? puppet.a.space.corp. (37)
10:46:40.849870 IP 172.28.19.52.32963 > gedapvl01.a.space.corp.domain: 61770+
AAAA? puppet.a.space.corp.a.space.corp. (50)
10:46:40.851213 IP 172.28.19.52.43808 > gedapvl01.a.space.corp.domain: 53335+
A? puppet.a.space.corp. (37)
10:46:45.238025 IP 172.28.19.52.47328 > gedapvl01.a.space.corp.domain: 36971+
AAAA? puppet.a.space.corp. (37)
10:46:45.239324 IP 172.28.19.52.53076 > gedapvl01.a.space.corp.domain: 1888+
AAAA? puppet.a.space.corp.a.space.corp. (50)
10:46:45.240345 IP 172.28.19.52.53371 > gedapvl01.a.space.corp.domain: 34589+
A? puppet.a.space.corp. (37)
10:46:47.671963 IP 172.28.19.52.40283 > gedapvl01.a.space.corp.domain: 37664+
AAAA? puppet.a.space.corp. (37)
10:46:47.673165 IP 172.28.19.52.36495 > gedapvl01.a.space.corp.domain: 44009+
AAAA? puppet. (24)
As soon as it tries to resolve "AAAA? puppet." the puppet clients hangs.
When the same machine is configured to query our Windows DNS servers
instead of the Bind DNS Servers, the problem doesn't exist.
I'm not really sure if this problem is a bug but it only happens on
Ubuntu 12.04. On Ubuntu 10.04 we don't see this behaviour.
The machines are configured by DHCP. I have started a thread regarding
this issue on the ubuntu forums but no one seems to have a clue what is
going wrong, so I was told to file a bug report.
Regards,
Oliver
** Affects: puppet (Ubuntu)
Importance: Undecided
Status: New
** Tags: bot-comment
--
Ubuntu 12.04 resolving hangs when querying AAAA records against BIND (Ubuntu
10.04) DNS servers
https://bugs.launchpad.net/bugs/1020067
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