[hobbit] How hobbit server deal with DNS server failure when doing conn test ?

Wed Mar 19 21:53:06 CET 2008

found the manpage.

http://www.hswn.dk/hobbit/help/manpages/man1/bbtest-net.1.html

but still not sure about ping test. will ping(conn) test will do the same like testing of telnet,http type of services.

--dns=[ip|only|standard]
Determines how bbtest-net finds the IP adresses of the hosts to test. 
By default (the "standard"), bbtest-net does a DNS lookup of the hostname 
to determine the IP address, unless the host has the "testip" 
tag, or the DNS lookup fails.

With "--dns=only" bbtest-net will ONLY do the DNS lookup;
it it fails, then all services on that host will be 
reported as being down.

With "--dns=ip" bbtest-net will never do a DNS lookup;
it will use the IP adresse specified in bb-hosts for
the tests. Thus, this setting is equivalent to having
the "testip" tag on all hosts. Note that http tests
will ignore this setting and still perform a DNS
lookup for the hostname given in the URL; see the
"bbtest-net tags for HTTP tests" section in
bb-hosts(5)

T.J. Yang

From: bewhite at fellowes.com
To: hobbit at hswn.dk
Date: Wed, 19 Mar 2008 15:37:38 -0500
Subject: RE: [hobbit] How hobbit server deal with DNS server failure when 	doing conn test ?

Neither.   It tries DNS, then it tries the
IP address in the bb-hosts file.   If it can ping the IP address it sets the
conn dot to green.   The only place I have found that reports it could not
resolve the name via DNS is in the output I copied into my email.

    …..Bruce

From: Josh Luthman
[mailto:josh at imaginenetworksllc.com] 

Sent: Wednesday, March 19, 2008
10:14 AM

To: hobbit at hswn.dk

Subject: Re: [hobbit] How hobbit
server deal with DNS server failure when doing conn test ?

So if it can not resolve
DNS, is it yellow instead of red?

On 3/19/08, White,
Bruce <bewhite at fellowes.com>
wrote:

Josh,

I think the first statement is true. 
I have many items monitored by hobbit which are not registered in DNS (I live
with a bunch of windows centric team mates and they rely on WINS not
DNS.   None of these items end up with conn=red, but they are ID'd in
the output from bbtest on the hobbit server.  Here is that output:

DNS statistics:

# hostnames resolved  :      383

# succesful          
:      306

#
failed             
:       77

# calls to dnsresolve :      414

Notice that I have 77 monitored items which fail
the DNS lookup.

      .....Bruce

From: Josh
Luthman [mailto:josh at imaginenetworksllc.com]

Sent: Wednesday, March 19, 2008
8:55 AM

To: hobbit at hswn.dk

Subject: Re: [hobbit] How hobbit
server deal with DNS server failure when doing conn test ?

Pretty confident if the
DNS lookup fails it times out and marks the conn red =(  If you don't need
it to do a DNS lookup simply add testip.

On 3/19/08, T.J.
Yang <tj_yang at hotmail.com>
wrote: 

I remember somewhere in
the manpages,

The hobbit server when doing fping conn test, it will try using FQDN and if

not resolvable,

it will use the ip address(from bb-hosts) file.

Is this a correct statement ?

I will summarize the answer here

http://en.wikibooks.org/wiki/System_Monitoring_with_Hobbit/Other_Docs/FAQ#How_does_the_conn_test_work_if_the_first_ping_doesn.27t_respond_.3F

tj

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Office: 937-552-2340

Direct: 937-552-2343

1100 Wayne St

Suite 1337

Troy, OH
 45373

Those who don't understand UNIX are condemned to reinvent it, poorly.

--- Henry Spencer 

----------------------------------------------------

Note: The information contained in this message may be privileged and confidential and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by replying to the message and deleting it from your computer. Thank you. Fellowes, Inc.

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