Xymon Mailing List Archive search

IPv6 debugging on xymon 4.4 (was Re: Roadmap/GitHub?/IPv6)

list Christian Herzog
Fri, 12 Apr 2019 08:07:30 +0200
Message-Id: <user-772c138f439f@xymon.invalid>

FPING should be the path to fping (/usr/sibn/fping?) not xymonping.
you're right. The frankensteined Debian package I built for 4.4 alpha
didn't set that correctly. I now compared all config values to our
production setup, but FPING was the only notable difference.


Anyway, the status is the same as yesterday: for a v6 only host, conn is
now green, but http and ssh stay red (DNS error)

current xymonnet debug log: https://people.phys.ethz.ch/~daduke/xymonnet-log


@JC: how can I debug this further? What other (IPv6 related) test would
be interesting for you?


thanks,

-Christian

-----Original Message-----
From: Xymon <xymon-bounces at xymon.com> On Behalf Of Christian Herzog
Sent: Thursday, April 11, 2019 3:46 AM
To: xymon at xymon.com
Subject: Re: [Xymon] IPv6 debugging on xymon 4.4 (was Re: Roadmap/GitHub?/IPv6)

ok I'll answer in reverse order...

- compiled and tested r8048
- same issue: conn is red for IPv6-only hosts
- fping: there wasn't any :)   I now installed fping 4.2 (buster). no
change.
- in xymonserver.cfg I have FPING="xymonping" - is that correct? seems
to be the default
- xymonnet --debug log is here:
https://people.phys.ethz.ch/~daduke/xymonnet-log
- most interesting line might be DNS lookup failed for ipv6.daduke.org -
status DNS server returned answer with no data (1), but 'host
ipv6.daduke.org' works and 3 lines later xymonnet says Adding tcp test
IP=2a01:4f8:162:464::113


thanks,
-Christian


On 4/9/19 6:33 PM, Japheth Cleaver wrote:
The first is the correct way of writing it, however the second really
should be accepted as well IMO since it's not uncommon for things to
be written that way.

Most of the response in
https://lists.xymon.com/archive/2016-October/043993.html is about
using both a 4.3.# and a 4.4-x xymon server as the destination points
simultaneously. The 4.3 branch won't recognize or record the IPv6 IPs
properly. So long as you're running 4.4-alpha in a normal fashion
(talking to itself) it should work fine -- no separate hosts file
needed or anything.

Can you send the relevant sections of xymmonet.log when running it in
--debug mode?
Also, what version of fping are you running on the system?

-jc


On 4/9/2019 12:12 AM, Christian Herzog wrote:
Hi JC,

I now compiled 4.4 alpha and set up a test server. IPv4 monitoring is
working
as expected. Can you remind me how to specify IPv6 tests? I found
https://lists.xymon.com/archive/2016-October/043993.html but can't
make much
sense of it.

in particular:
- do I need any compile switches to enable IPv6 support?
- how to specify a v6 host? I tried
     2a01:4f8:162:464::113 testhost and
     [2a01:4f8:162:464::113] testhost
   the first yields conn red and the second doesn't work at all
- separate v6 hosts file ok, how to make it known then?


thanks,
-Christian


On Fri, Apr 05, 2019 at 08:53:39AM -0700, Japheth Cleaver wrote:
Hi Christian,

That's actually really great to hear. The current 4.4 alpha would be
https://sourceforge.net/p/xymon/code/HEAD/tree/branches/4.x-master/

I'll probably branch that after forward porting these patches coming
in to
4.3.29, and trying to reduce some of the warnings I'm seeing in
compiles. In
the meantime, any validation from snapshots off that branch would be
helpful.

Regards,
-jc

On 4/5/2019 4:47 AM, Christian Herzog wrote:
hey JC,

thanks for the status update. I've done some pretty extensive IPv6
xymon
testing 6 years ago ([1] and later private emails with Henrik) and
found IPv6
support to be in pretty good shape in then 4.3.99.tgz. However,
none of this
seems to be in 4.3.28.
Since we're now once again (and for reals this time!) on the verge of
introducing IPv6 into our networks, I'll have to come back to
working on xymon
IPv6. I'd be happy to do all sorts of testing, but where to start?
I can't
even find any 4.4 (alpha) tree out there.
Can you advise?

thanks and best regards,
-Christian


[1] https://xymon.xymon.narkive.com/BbXHR8kH/status-of-ipv6-support
On Fri, Mar 08, 2019 at 06:46:52AM -0800, Japheth Cleaver wrote:
I think a larger discussion on Xymon's roadmap in terms of Docker and
container analysis is definitely something warranted. A host-based
approach
tends to invite individualized responses to coordination among
varying
levels of architecture (including both host -> hypervisor,
baremetal (eg,
DRAC) -> host, and hypervisor "status" reporting), but containers'
typically
ephemeral nature could merit a distinct reference point -- or not,
if it's
desired to have them persistently reportable. Host-Svc may or may
not make
sense there.

I tend to agree that a move to Github may be helpful here at this
point -
athough with the various community issues people have had with GH
since MS's
purchase, it seems there has been a bit of an outcry, I'm not sure
there's
much SF will end up being able to capitalize on. It would
certainly make
PR's easier to coordinate and invite more interaction.

The largest stalling point on the roadmap here was indeed the IPv6
transition. I think things are releasable in an Alpha state, and
that was
the intent at the last release, but it's been difficult to find
any site
using IPv6 at sufficient scale who could help with the testing
process.
That's a bit of a Catch-22 though, and perhaps it would be best to
release
an easy reference point for future testing and go from there -
along with
the various other patches that I've received. (And this does raise
the
question of what the next highest priorities out there will be.)

Regards,
-jc

--
Dr. Christian Herzog <user-5bd58cd9da64@xymon.invalid>  support: +41 44 633 26 68
IT Services Group, HPT H 8                    voice: +41 44 633 39 50
Department of Physics, ETH Zurich
8093 Zurich, Switzerland                     http://nic.phys.ethz.ch/


This communication is the property of CenturyLink and may contain confidential or privileged information. Unauthorized use of this communication is strictly prohibited and may be unlawful. If you have received this communication in error, please immediately notify the sender by reply e-mail and destroy all copies of the communication and any attachments.

-- 
Dr. Christian Herzog <user-5bd58cd9da64@xymon.invalid>  support: +41 44 633 26 68
IT Services Group, HPT H 8                    voice: +41 44 633 39 50
Department of Physics, ETH Zurich
8093 Zurich, Switzerland                     http://nic.phys.ethz.ch/