Depends tag working configuration

I believe the core issue is that ping (conn) testing is reconciled in a
different manner from the standard TCP tests. The following should work
for you. It should cause http on 6030 to keep from going red when 5030 is
un-pingable:

10.0.0.139  6030 # http://paq depends=(http:5030/conn) route:5030 testip
10.0.0.137  5030 # http://fara testip

If you don't have a specific reason to handle ICMP and TCP differently,
you may find it easier to simply run 'noconn' on pure URL hits like this,
especially if these are actually pointing to a common load balancer, or
there's another interconnected dependency layer there.

If this doesn't work, it's possible that there's something being
mis-parsed, perhaps with all-numeric hostnames... :/ Would you be able to
try the same setup with a different set of hosts and see if it works?


I'll see if there's an easy way to have dependency apply in conn parsing
as well, but this may be something that's easier to handle with a general
revamp to dependency tracking as a 'host down' function centrally as
discussed earlier.


HTH,
-jc


On Mon, April 4, 2016 1:51 pm, Scot Kreienkamp wrote:

I have never tried the depends tag with conn test so I can’t comment on
whether it would work or not.  However, as it is a network test it should
to the best of my knowledge.

In this scenario if the http://fara test is returning red and the
http://paq test returns red as well, then the http test on 6030 should
turn clear.  This is saying the 6030:HTTP test (http://paq) depends on the
success of the 5030:HTTP test (http://fara).  So if both fail then the
6030:HTTP test should turn clear because the HTTP test on 6030 and 5030
have both failed.  The depends tag does nothing if the test it depends on
is green/OK status, so if the 5030:HTTP test (http://fara) is green/OK,
then 6030 will show it’s true unmodified status.


Scot Kreienkamp  | Senior Systems Engineer | La-Z-Boy Corporate
One La-Z-Boy Drive | Monroe, Michigan 48162 | Office: XXX-XXX-XXXX | |
Mobile: XXXXXXXXXX | Email: user-9678697f1438@xymon.invalid
From: Mario [mailto:user-82c7780661a4@xymon.invalid]
Sent: Monday, April 04, 2016 4:13 PM
To: Scot Kreienkamp <user-9678697f1438@xymon.invalid>
Cc: xymon at xymon.com
Subject: Re: [Xymon] Depends tag working configuration

Scot,
My logic is confused now.
http test:
10.0.0.139  6030 # http://paq depends=(http:5030/http) testip
10.0.0.137  5030 # http://fara  testip
Stopping apache http://paq gives on xymon the correct clear status on
6030/http:

6030 - http

[clear]http://paq/ - Connection refused


This test depends on the following test(s) that failed:


5030/http


Seconds: 0.002152000

In my head, changing http to conn on depends tag and "removing" 6030
network cable should produce a 6030/conn to go clear, considering
5030/conn as up.
If both are down, ok, both goes red.
In my tests conn test doesn´t work with depends tag.

Thanks & Regards,
Mario


On Mon, Apr 4, 2016 at 4:49 PM, Scot Kreienkamp
<user-9678697f1438@xymon.invalid<mailto:user-9678697f1438@xymon.invalid>>
wrote:
“In my example, when the conn test was failing on 6030 and as the conn
test was ok/up on 5030 then the correct status for 6030/conn should be
clear and not red, right?”

No.  If the conn test on 5030 is OK then the conn test on 6030 should be
red if it is not pingable or green if it is.  The status on 6030:conn is
only modified if 6030:conn AND 5030:conn is red.
From: Mario
[mailto:user-82c7780661a4@xymon.invalid<mailto:user-82c7780661a4@xymon.invalid>]
Sent: Monday, April 04, 2016 3:45 PM
To: Scot Kreienkamp
<user-9678697f1438@xymon.invalid<mailto:user-9678697f1438@xymon.invalid>>
Cc:xymon at xymon.com<mailto:xymon at xymon.com>
Subject: Re: [Xymon] Depends tag working configuration

Hello Scot,
Yes, I know the route tag and I already use it here for the upstream
cases.
But my necessity here is to have a dependency between some networks tests,
for example, conn/ssh, conn/smtp, conn/http.
In my example, when the conn test was failing on 6030 and as the conn test
was ok/up on 5030 then the correct status for 6030/conn should be clear
and not red, right?

10.0.0.139  6030 # http://paq depends=(conn:5030/conn) testip
10.0.0.137  5030 # http://fara  testip

I´ve made some tests and it seems that the depends tag do not works with
any conn configuration.
Does not matter the "position" on the tag, depends=(conn:5030/http),
depends=(http:5030/conn) or depends=(conn:5030/conn), any of this works.
I´ve read some old emails on the list with the same question on "depends
& conn" but without a solution.

Thanks & regards,
Mario


On Mon, Apr 4, 2016 at 4:15 PM, Scot Kreienkamp
<user-9678697f1438@xymon.invalid<mailto:user-9678697f1438@xymon.invalid>>
wrote:
Mario,

If I’m understanding your email correctly, you changed the IP on 6030 to
a non-pingable address, correct?  If so, then you are performing your test
incorrectly.  The tag you posted means that 6030 depends on 5030, but to
test it you changed the IP on 6030 only.  To test it with the tag you
posted, 5030 and 6030 must BOTH be non-pingable.  In that scenario the
conn test on 6030 should change to clear.

Also, if you only want a connectivity test then you may be looking at the
wrong tag.  Look up the route tag that goes in hosts.cfg and see if that
will give you what you want.
From: Mario
[mailto:user-82c7780661a4@xymon.invalid<mailto:user-82c7780661a4@xymon.invalid>]
Sent: Monday, April 04, 2016 3:09 PM
To: Scot Kreienkamp
<user-9678697f1438@xymon.invalid<mailto:user-9678697f1438@xymon.invalid>>;
xymon at xymon.com<mailto:xymon at xymon.com>
Subject: Re: [Xymon] Depends tag working configuration

Hi Scot,
Thanks for your help.
I´ve used your example and the dependency worked using the http test.
So then, I´ve changed the depends tag configuration to use the conn test
and this didn't work.
First test (worked as expected!):
- Stopping apache on "6030" the result was a clear status on 6030/http as
5030/http was up.

0.0.0.0  6030 # http://paq depends=(http:5030/http) noconn
0.0.0.0  5030 # http://fara  noconn

Second test (connectivity configuration on depends): This test didn´t
work.
- I´ve changed the IP from 6030 to a non pingable IP and let an
available/online IP on "5030" and the depends tag didn´t work.
10.0.0.139  6030 # http://paq depends=(conn:5030/conn) testip
10.0.0.137  5030 # http://fara  testip
Do you have a dependency configuration based on connectivity test working
on your system?

Thanks & Regards,
Mario


On Mon, Mar 28, 2016 at 4:45 PM, Scot Kreienkamp
<user-9678697f1438@xymon.invalid<mailto:user-9678697f1438@xymon.invalid>>
wrote:
Sure.  Here is a working config:


0.0.0.0    6030 # http:// 6030:8090/Main/ depends=(http:5030/http)
0.0.0.0  5030 # http://5030

So I’ve defined an HTTP test on 5030 and 6030, and set the HTTP test
result on 6030 to depend on the HTTP test on 5030.  In my case, 5030 is
the DB server and serves up a web page if the database is up.  If the
database is down there’s no way the HTTP test will succeed on 6030, so I
don’t really care if 6030 is alerting me in that case.

If you have any more trouble it would be helpful to see your
configuration.  I saw you mention ICMP earlier… keep in mind that
depends sets a test dependent on another test, so if you want ICMP you
have to set it to depend on the conn test.  You can’t use ICMP in the
depends.  It has to be a column name.
From: Xymon
[mailto:xymon-bounces at xymon.com<mailto:xymon-bounces at xymon.com>] On Behalf
Of Mario

Sent: Monday, March 28, 2016 3:04 PM
To:xymon at xymon.com<mailto:xymon at xymon.com>
Subject: Re: [Xymon] Depends tag working configuration

Hi,
Thanks, Scot.
Yes, that´s what I´m doing here.
The test configuration was done with only core network tests and that are
directly running on the core server and it´s not working.
Do you have this configuration working on your server? Could you share
it?
Thanks & Regards,
Mario


On Mon, Mar 28, 2016 at 3:43 PM, Scot Kreienkamp
<user-9678697f1438@xymon.invalid<mailto:user-9678697f1438@xymon.invalid>>
wrote:
The depends tag works, but only for tests done by the core network tester
itself.  It will not work on any external tests.
From: Xymon
[mailto:xymon-bounces at xymon.com<mailto:xymon-bounces at xymon.com>] On Behalf
Of Mario
Sent: Monday, March 28, 2016 2:41 PM
To:xymon at xymon.com<mailto:xymon at xymon.com>
Subject: [Xymon] Depends tag working configuration

Hi All,
I´m trying to make the "depends=" hosts.cfg tag to work on Xymon version
4.3.24.
Reading some old threads here, it became not clear to me if this
configuration tag currently works or not.
Has someone here have the depends tag working?
I know I can use the route tag, but my intention it´s to use another
network protocol and not ICMP for the dependency.


Thanks & Regards,
Mario


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