Network Management Integration Plugin ( v0.3.9a Build 129 )

neovox · Post by **neovox** » Wed Jul 01, 2009 11:07 am

I installed the WebService Plugin this morning and have been having a difficult time getting it to work. My Cacti install is version 0.8.7d with PA 2.4. I installed the WebService via Plugin Management, set a password, and made the password and url changes to the getGraph.pl file.

When I try to pull up a graph via url (http://cacti.mydomain.com/cgi-bin/getGraph.pl?lgid=4714) I get :

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Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, root@localhost and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.
Apache/2.0.59 (CentOS) Server at x.x.x.x Port 80

The httpd error log shows:

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[Wed Jul 01 11:37:54 2009] [error] [client x.x.x.x] (8)Exec format error: exec of '/var/www/cgi-bin/getGraph.pl' failed
[Wed Jul 01 11:37:54 2009] [error] [client x.x.x.x] Premature end of script headers: getGraph.pl

Any suggestions would be helpful. I can't seem to find what's causing the failure.

Thanks,

Mike

phalek · Post by **phalek** » Wed Jul 01, 2009 1:01 pm

run it via the cli and post the output here. it gives more info on what is wrong than http.

neovox · Post by **neovox** » Wed Jul 01, 2009 1:46 pm

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[cgi-bin]# perl /var/www/cgi-bin/getGraph.pl
multiple roots, wrong element 'b'
<br />
<b>Warning</b>:  fread() [<a href='function.fread'>function.fread</a>]: Length parameter must be greater than 0 in <b>/var/www/html/plugins/nmidWebService/webservice.php</b> on line <b>82</b><br />
<?xml version="1.0" encoding="ISO-8859-1"?><SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"><SOAP-ENV:Body><ns1:getGraphResponse xmlns:ns1="http://soapinterop.org/"><return xsi:type="xsd:string"></return></ns1:getGraphResponse></SOAP-ENV:Body></SOAP-ENV:Envelope> at /var/www/cgi-bin/getGraph.pl line 21

phalek, thanks for the assistance.

phalek · Post by **phalek** » Wed Jul 01, 2009 2:04 pm

what is configured in the following section:

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### START OF WEB SERVCE SETTINGS ###
my $webservice_password = 'guest';
my $webservice_url = 'http://redmine.nmid-plugins.de:8080/cacti/plugins/nmidWebService/webservice.php?wsdl';
my $tmp_dir = '/tmp/';
### END OF WEB SERVCE SETTINGS ###

?

It should match your server, password and tmp dir

neovox · Post by **neovox** » Wed Jul 01, 2009 2:37 pm

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### START OF WEB SERVCE SETTINGS ###
my $webservice_password = '123456';
my $webservice_url = 'http://x.x.x.x/plugins/nmidWebService/webservice.php?wsdl';
my $tmp_dir = '/tmp/';
### END OF WEB SERVCE SETTINGS ###

The password matches what has been entered under the NMID tab in the Cacti settings. URL matches Cacti install, and if I browse to http://x.x.x.x/plugins/nmidWebService/webservice.php I get the InteropTest page. The "/tmp" directory exists with root as owner/group.

phalek · Post by **phalek** » Wed Jul 01, 2009 2:50 pm

ok,

where did you get the nmidWebService from ?

http://redmine.nmid-plugins.de/projects ... webservice

or from this post ?

neovox · Post by **neovox** » Wed Jul 01, 2009 3:00 pm

Yes. from that link. Actually from the link at the bottom of this post, which redirects to the download here.

phalek · Post by **phalek** » Wed Jul 01, 2009 3:06 pm

Ok, this might be a permission problem.

The tmp dir in the nmidWebService plugin must be writeable by the webserver:

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[root@redmine cacti]# ls -l  plugins/nmidWebService/
total 32
-rwxr-xr-x 1 root   root    633 Jun  9 21:28 create_image.php
-rw-rw-rw- 1 apache apache   44 Feb 28  2008 index.php
drwxrwxrwx 2 apache apache 4096 Dec  2  2008 lib
-rw-rw-rw- 1 apache apache 2986 Jun  9 22:11 setup.php
drwxrwx--- 2 apache apache 4096 Jul  1 21:06 tmp
-rw-rw-rw- 1 apache apache 8694 Jun  9 22:10 webservice.php

phalek · Post by **phalek** » Wed Jul 01, 2009 3:11 pm

Odd. phpBB doesn't display my last post in Google Chrome

neovox · Post by **neovox** » Thu Jul 02, 2009 9:27 am

I've changed the permissions to match what you provided in the last post.

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 [root@cacti nmidWebService]# ls -l
total 32
-rwxr-xr-x  1 root   root    633 Jul  1 08:34 create_image.php
-rw-rw-rw-  1 apache apache   44 Jul  1 08:34 index.php
drwxrwxrwx  2 apache apache 4096 Jul  1 08:34 lib
-rw-rw-rw-  1 apache apache 2986 Jul  1 08:34 setup.php
drwxrwx---  2 apache apache 4096 Jul  2 10:11 tmp
-rw-rw-rw-  1 apache apache 8694 Jul  1 08:34 webservice.php

I still get an Internal Server Error when trying to display from the browser. However, I'm getting a different error now when I try to run getGraph.pl from the CLI.

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[root@cacti httpd]# perl /var/www/cgi-bin/getGraph.pl

junk after document element at line 2, column 0, byte 7 at /usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi/XML/Parser.pm line 187
<br />
<b>Warning</b>:  fread() [<a href='function.fread'>function.fread</a>]: Length parameter must be greater than 0 in <b>/var/www/html/plugins/nmidWebService/webservice.php</b> on line <b>82</b><br />
<?xml version="1.0" encoding="ISO-8859-1"?><SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"><SOAP-ENV:Body><ns1:getGraphResponse xmlns:ns1="http://soapinterop.org/"><return xsi:type="xsd:string"></return></ns1:getGraphResponse></SOAP-ENV:Body></SOAP-ENV:Envelope> at /var/www/cgi-bin/getGraph.pl line 21
[root@cacti httpd]#

httpd error_log output

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[Thu Jul 02 10:11:11 2009] [error] [client x.x.x.x] PHP Warning:  fread() [<a href='function.fread'>function.fread</a>]: Leng
th parameter must be greater than 0 in /var/www/html/plugins/nmidWebService/webservice.php on line 82

phalek · Post by **phalek** » Fri Jul 03, 2009 1:50 am

I cannot reproduce this error on my server(s).

Neovox, can we schedule a web-meeting to work on this error ?

Basically, the error "Length parameter must be greater than 0" error sais, that you're trying to get a non-existing graph graph.

The CLI interface takes a default value if you didn't specify anything, go edit the getGraph.pl file and change the number at the end of following line to something that is existing in your environment:

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...
my $lgid = $query->param('lgid') || 697;
...

Then re-run the perl /var/www/cgi-bin/getGraph.pl script and see what it is putting out then ...

neovox · Post by **neovox** » Mon Jul 06, 2009 9:25 am

Ok. Tired changing the default image from 1 to 2933, which is an active graph, and got output that looks like it's likely correct.

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[root@cacti cgi-bin]# perl ./getGraph.pl
Content-type: image/png

‰PNG

IHDR‡6`aGItEXtSoftwareRRDtool, Tobias Oetiker <tobi@oetike.ch>, http://tobi.oetiker.chƒ\aà IDATxí½y´U™þÏ¨dè@K£Ì$Ih €È ÍjífA#*
üífI3ô‚ì^m+ˆ°¤»],‘¹›a”Y!d"@Büçû÷þå©³öIÝ“:Ó'÷¾÷Ö½Ï¹ëÜ:§ªžý>ûÙÏ®ª·vªufÏžü¶ö€=`Øö€=`Øö€=`Œ]üú×¿NëØc×n{·½=`Øö€=`Øö€=`(1þùÏN~[{À°ì{À°ì{À°Æ–   ETC....

Still getting internal server error from browser. Perhaps this is an Apache issue.

phalek · Post by **phalek** » Mon Jul 06, 2009 9:30 am

but then it should show up in the log if it's an apache problem ...

i can provide a binary if you like and try it with the binary. I only need to know the operating system you use.

neovox · Post by **neovox** » Mon Jul 06, 2009 9:41 am

sure i'll give that a try. Running CentOS - a CactiEZ install.

phalek · Post by **phalek** » Mon Jul 06, 2009 1:00 pm

I've created a binary for the getGraph.pl file. It needs to be configured with the getGraph.ini file which needs to be placed in the same dir.

When installed just call it the usual way:

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http://myserver/cgi-bin/getGraph.bin?lgid=<local_graph_id>

e.g.
http://78.47.109.218/cgi-bin/getGraph.bin?lgid=1

replace the "<local_graph_id>" with a working/existing graph.

Nevertheless, I got the script working in CactiEz using the RHEL repository from Dag http://dag.wieers.com/rpm/FAQ.php#B.

How did you install the required perl-SOAP-Lite libs, via CPAN or yum ?

The binary files can be downloaded from the Project Page

Network Management Integration Plugin ( v0.3.9a Build 129 )

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