Zabbix fails to generate graphs

[wibbit]

Good afternoon.

I've installed Zabbix 1.6.1 svn 6376 from http://repo.ocjtech.us/zabbix/epel/5/i386/ and I am finding that all of the graphs are blank.

Both graphs that I try to generate from interface statistics, or by going to the "latest data" screen, and click on the graph option for the inbound information.

Is any one else having this issue?

[wibbit]

Here are some screen shots, that hopefully will help.

They are taking from Latest Data, with the IE browser on Windows.

[Calimero]

Did you install GD for PHP (or build PHP with GD support) ?

On debianish systems, install package php5-gd (or php4-gd).
On redhatish systems, you're looking for php-gd.

[wibbit]

Yup, I'd thought that this may have been left out of the build process/dependancy for the RPM's.

However.

rpm -qi php-gd
Name : php-gd Relocations: (not relocatable)
Version : 5.1.6 Vendor: CentOS
Release : 20.el5_2.1 Build Date: Thu 17 Jul 2008 12:57:23 AM BST
Install Date: Wed 05 Nov 2008 12:54:44 PM GMT Build Host: builder16.centos.org
Group : Development/Languages Source RPM: php-5.1.6-20.el5_2.1.src.rpm
Size : 331641 License: The PHP License v3.01
Signature : DSA/SHA1, Thu 17 Jul 2008 02:44:32 AM BST, Key ID a8a447dce8562897
URL : http://www.php.net/
Summary : A module for PHP applications for using the gd graphics library
Description :
The php-gd package contains a dynamic shared object that will add
support for using the gd graphics library to PHP.

Suggests it's all okay.

The worst part is that I can't seem to find any errors any where, even when upping the zabbix debug to 4, though that could be related to the amount of information, and me missing some thing.

[Calimero]

You must check you Apache logs, not zabbix_server's logs.

What if you copy the URL of one of the broken images and display it "directly" (paste in address bar of browser) ?

[wibbit]

The HTTP logs are giving me no indication of a problem being present.

I get the following error when trying to view the file directly.

The image “http://gbgh-svmon-01.sig.ads/zabbix/...&width=1200” cannot be displayed, because it contains errors.

[Calimero]

What if you try wget or curl on that URL ?

[wibbit]

wget http://zabbix.sig.ads/chart.php?item...600&width=1200
[1] 19989
[2] 19990
[3] 19991
[4] 19992
[2] Done from=0
[3] Done stime=200812031434
[4]+ Done period=3600
[dfurlong@gbgh-dsk-00089 Desktop]$ --2008-12-03 15:39:23-- http://zabbix.sig.ads/chart.php?itemid=22208
Resolving zabbix.sig.ads... 192.168.200.159
Connecting to zabbix.sig.ads|192.168.200.159|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 800 [image/png]
Saving to: `chart.php?itemid=22208'

100%[================================================== ================================================== ================================================== =================>] 800 --.-K/s in 0s

2008-12-03 15:39:23 (107 MB/s) - `chart.php?itemid=22208' saved [800/800]


[1]+ Done wget http://zabbix.sig.ads/chart.php?itemid=22208

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

I've attached the resultant file, according to file, it just see's it as data, checking head output suggests a PNG file, but doesn't appear to be liked by image viewers.

[wibbit]

Re-attaching the file within a zip container.

[Calimero]

Er... you should use quotes around the URL or the shell with run multiple (non-existent) commands in background.

wget "http://my.zabbix.com/graph..."

Then just check file content to check for PHP error messages.

[wibbit]

/me feels sheepish...

That was a fairly silly mistake.

I've done it again, escaping the special characters (with quotes), and have looked at the resultant file, and I can see nothing in the file that gives an indication of an error, nor can I see any errors in my web log.

192.168.202.95 - - [03/Dec/2008:16:20:59 +0000] "GET /chart.php?itemid=22208&from=0&stime=200812031520&p eriod=3600&width=1200 HTTP/1.1" 200 10792

I've attached the new file, incase you can see some thing that I can not.

[Laca]

Exactly the same symptom

Hi!

We have exactly the same symptom in the same environment. CentOS, mysql, php-gd, and Zabbix 1.6.1 without graphs and images.

It seems like a CentOS specific problem. (We have tested it with Firefox, IE and from command prompt with wget.)

We have just migrated it from Ubuntu yesterday, because Ubuntu is not supported by the IBM blade where we tried to install it.

Any suggestions?

[akatsuki]

hi wibbit,

I checked your posted PNG data with binary editor and i found it has wrong PNG header at first of data.
Nomary PNG header starts,

\x89PNG\x0d\x0a\x1a\x0a

, but your one has,

\x0a\x89PNG\x0d\x0a\x1a\x0a...

I suspect that your /path/to/phpfiles/conf/zabbix.conf.php ends with null line with 0x0a.
If so, terminate this conf file with '?>' without linefeeding.


By the way, with trimed off head of 0x0A, file shows a graphic which words, "ERROR: No permissons !", are written.

[wibbit]

Good morning.

That did indeed fix the problem.

The configuration file had an additional line at the end which was causing the problem.

"dd" in vi, and saving the file resolved the issue, may I suggest that this is an issues that really should be covered programatically.

I would have thought the application would at least be able to warn that there are errors in the configuration file, or at least not be as sensitive.

Either way, for me it is all working.