[hobbit] ghostlist

Wed May 28 06:13:31 CEST 2008

Hi Henrik/Ralph,

On my system running 4.2 with all in one patch...

./server/bin/bb 10.1.50.4 ghostlist
bar|10.1.50.4|1211944491
ho|10.1.50.4|1211944491
hum|10.1.50.4|1211944491
zulu.XXXX.com.au|10.1.50.4|1211944491

So all the above is good....

Just to clarify, hosts bar, ho, hum and zulu are all sending a message to
hobbitd every five minutes. Only one test is being sent, this is a test
titled alerts. There is no cpu, memory or any other test being sent.

And just to confirm,
grep zulu ./server/etc/bb-hosts
returns nothing...

I then add the following line to bb-hosts

0.0.0.0 zulu.XXXX.com.au

grep zulu ./server/etc/bb-hosts now returns
0.0.0.0 zulu.XXXX.com.au

I now wait >10 minutes (only because I am trying to multi-task other
work)... The host appears on the bb.html page and I can see a yellow dot for
the test that is being sent every five minutes to trigger it as a ghost... I
can click on the dot and see the message, including an rrd graph of the data
received. So far so good...

I now run...

./server/bin/bb 10.1.50.4 hobbitdboard | grep zulu
zulu.XXXX.com.au|trends|green||0|0|0|0|0||0|
zulu.XXXX.com.au|info|green||0|0|0|0|0||0|
zulu.XXXX.com.au|conn|green|OrdAstLe|1211945995|1211946296|1211948096|0|0|
10.1.50.4|-1|green <!-- [flags:OrdAstLe] --> Wed May 28 11:44:55 2008 conn
ok
zulu.XXXX.com.au|alerts|yellow||1211945994|1211946295|1211948095|0|0|
10.1.50.4|82688|yellow Wed May 28 11:44:55 WST 2008

So from the above, I would assume that it would now no longer be listed as a
ghost...

Just to be sure, I will wait another >15 minutes....
And then...

./server/bin/bb 10.1.50.4 ghostlist
bar|10.1.50.4|1211946596
ho|10.1.50.4|1211946596
hum|10.1.50.4|1211946596
zulu.XXXX.com.au|10.1.50.4|1211945699

It is still there...

I give it another 10 minutes and then I restart hobbit

su - hobbit -c "/opt/hobbit/server/hobbit.sh restart"

wait 10 minutes...

And re-run

./server/bin/bb 10.1.50.4 ghostlist
bar|10.1.50.4|1211947632
ho|10.1.50.4|1211947632
hum|10.1.50.4|1211947632
zulu has gone...

This email is long enough, but if I now reverse the process and remove zulu
from the bb-hosts file, zulu will never become a ghost again until after the
next restart, even though hobbitdboard no longer shows it in its list.

Can I assume this is a bug/feature?

Cheers

Phil

2008/5/28 Ralph Mitchell <ralphmitchell at gmail.com>:

>  On Mon, May 26, 2008 at 7:30 AM, Henrik Stoerner <henrik at hswn.dk> wrote:
>
>> On Fri, May 23, 2008 at 10:06:59PM +0800, Phil Wild wrote:
>> > I am trying to use the output received from hobbitd when issuing the bb
>> > ghostlist command. The command reports correctly, but after modifying
>> the
>> > bb-hosts file, ghostlist continues to report ghosts. I need to do a full
>> > restart of hobbit to get hobbitd reporting correctly.
>>
>> hobbitd reloads the bb-hosts file every 10 minutes, or if you send a HUP
>> signal to the hobbitd process. Hosts will remain on the ghostlist until
>> no reports have been received with ghost hostname for 10 minutes.
>>
>> So if you have a ghost reporting at 12:00, and you modify the bb-hosts
>> file at 12:01, then the host reports again at 12:05, the bb-hosts file
>> is reloaded at 12:11, and the ghost entry expires at 12:15. So it may
>> take up to 15 minutes before the ghostlist entry disappears.
>>
>> > I started digging through the source tonight but I have to admit that I
>> just
>> > can't understand C well enough. hobbitd knows the bb-hosts file has been
>> > updated because the host appears on the webpage, but ghostlist still
>> reports
>> > it incorrectly.
>>
>> Note: the fact that the host appears on the webpage does NOT mean
>> hobbitd knows about it. The webpage is generated by another task, and
>> until hobbitd learns about the new hostname, it will just show up
>> with no status columns.
>>
>
>
> I did this just one time:
>
>    server/bin/bb localhost "status server,domain,com.bogus green `date`"
>
> server.domain.com has never have existed in my bb-hosts file.  It showed
> up in the Ghost Clients web page for 5 minutes.  It also showed up in the
> ghostlist generated via this command:
>
>    server/bin/bb localhost ghostlist
>
> Several days later, the above command was still showing this:
>
>       server.domain.com|127.0.0.1|1211218983
>
> This was with the Jan 25 2008 4.3.0 snapshot.
>
> Ralph Mitchell
>

-- 
Tel: 0400 466 952
Fax: 0433 123 226
email: philwild AT gmail.com
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