Hi Thomas,
Am 13.03.13 11:34, schrieb Fuerle, Thomas:
since this Monday all our SunRays did not start anymore by asking for
my big surprise to a server with IP 109.235.58.103
After tracing what happend here it turned out, that we have
configured the server FQDN in the parms file like
cat /tftpboot/SunRayP9.parms
...
servers=srssXX.oenb.at,srssXX.oenb.at
...
While the Sun Ray was booting we saw, that it issued a DNS query for
srssXX.oenb.at.oenb.at, i.e appending the suffix to the already
existing FQDN Name, which did not work and ended in an try to reach
109.235.58.103, whatever this IP comes from, never heard so far and
is nowhere configured.
To suppress these extra lookups in Sun Rays, you can add a trailing
period to FQDNs:
servers=srssXX.oenb.at.,srssXX.oenb.at.
This should work both in .parms files and in the config GUI.
so I changed to
...
servers=srssXX,srssXX
...
in the parms file and everything worked smooth again except that 600
Sun Rays were down for hours ...
Anybody have an explanation for that, it seems quite independend of
Sun Ray or VDI server version ?
This is likely to be caused by a change on your DNS servers.
Sun Rays have done this for ages: to allow using local or partial host
names, a Sun Ray in domain 'subd.example.org', to look up host name
'host.name' will try all of:
host.name.subd.example.org
host.name.example.org
host.name
Unfortunately some DNS servers are set up to be "helpful": when looking
up an unresolvable name, they don't fail the lookup, but instead return
the address of some host on the local network that serves a "Page does
not exist" html page on port 80....
The most likely explanation for your problem is that such a feature was
newly configured in your DNS or that name lookup had to fall back to a
secondary DNS server, which has this configured - using '109.235.58.103'
as the 'default' IP to return.
The old setting with srssXX.oenb.at in the parms was running for an
year now without issues, I don't get it. You can also type e.g.
sunray-servers.oenb.at in servers area in the GUI and get the same
error not reaching 109.235.58.103 instantly.
The 'trailing dot' feature was added to Sun Ray software for such cases
(the old search behavior was left unchanged for compatibility reasons)
HTH
- Jörg Barfurth
--
Jörg Barfurth http://blogs.oracle.com/joergb
Disclaimer: I am employed by Oracle. The statements and opinions
expressed here are my own and do not necessarily represent those
of Oracle Corporation.
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