[hobbit] linux version
michael_frey at glic.com
Fri Jan 6 18:18:50 CET 2006
My cgi-error log shows:
libpng warning: Application was compiled with png.h from libpng-1.2.8
libpng warning: Application is running with png.c from libpng-1.0.12
libpng error: Incompatible libpng version in application and library
Intel Senior Systems Engineer
The Guardian Life Insurance Company of America
3900 Burgess Place, 2-West
Bethlehem, PA 18017
E-Mail: Michael_frey at glic.com
Charles Jones <jonescr at cisco.com>
01/06/2006 12:16 PM
Michael Frey <michael_frey at glic.com>
hobbit at hswn.dk
Re: [hobbit] linux version
I also forgot to mention the other thing to check for is cgi execution
issues. Your webserver should be configured to execute cgi in the
specified hobbit-cgi directory, otherwise it can cause similar problems to
what you are seeing. I recommend checking your /var/log/httpd/error_log
and see if there are any cgi permissions errors.
My server has an /etc/httpd/conf.d/hobbit.conf, which contains all of the
directory aliases and defines permissions for the cgi directories. You
should have one as well, either there or appended to your
Charles Jones wrote:
Yes it looks like an issue with libpng. Verify this by going to your
hobbit directory, then cd to the "bin" directory, and run the ldd command
on hobbitgraph.cgi. This will show all the libs that hobbitgraph expects
to find, and if it has access to them or not. Here is a sample output
from my hobbit server:
# ldd hobbitgraph.cgi
libpcre.so.0 => /lib/libpcre.so.0 (0x0098d000)
librrd.so.2 => /usr/local/rrdtool-1.2.11/lib/librrd.so.2
libpng12.so.0 => /usr/lib/libpng12.so.0 (0x00be1000)
libc.so.6 => /lib/tls/libc.so.6 (0x005cf000)
libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0x00804000)
libz.so.1 => /usr/lib/libz.so.1 (0x00726000)
libart_lgpl_2.so.2 => /usr/lib/libart_lgpl_2.so.2 (0x0044d000)
libm.so.6 => /lib/tls/libm.so.6 (0x006fb000)
I'm guessing that for you libpng is missing. If you already have it, but
its in the wrong place, the fix can be as simple as making a symlink to
it, or copying it to where hobbit expects it to be. Other solutions
include editing your /etc/ld.so.conf (run ldconfig afterwards), or
recompiling hobbit and giving it the exact location of libpng.
Michael Frey wrote:
The specific issue I am having is with the history graphs drawing.
Everything else is working fine.
They used to work, but after a reboot, they failed. I recall having to
manually copy ldpng somewhere, but that is it.
I know I am in over my head with the linux piece, but it worked before,
and I am sure it is a simple fix; I just can't figure it out.
I have some great resources here that know linux, but they are at a loss
with the pieces hobbit uses.
Any suggestions for the cgi-graphing would simplify everything, as I would
eave the current build running.
From: Michael Frey [mailto:michael_frey at glic.com]
Sent: Friday, January 06, 2006 11:00 AM
To: hobbit at hswn.dk
Subject: [hobbit] linux version
I have had a linux rh 7.3 server running, and have had issues with the
I tried to upgrade to Fedora C3, bit that looks to be missing some
What would be the recommended version of Linux to avoid all of these
What missing important pieces? I have run hobbit on Redhat9, Fedora Core
3, Fedora Core 4, Centos 3.x, Centos 4.x, and Solaris 10.
All of the installs required fulfilling various dependencies like rrdtool,
libpng, etc. I would say the easiest install I did was on FC4...I'm not
sure you will find an OS that will have all of hobbits dependencies
available in the base packages branch, but with any decently new distro
you should have pretty much everything available except rrdtool.
If you are the kind of person who prefers to use RPMs for everything,
check out Dags (http://dag.wieers.com/home-made/apt/packages.php), they
have RPMs for most distros (redhat 7,9,fc1-4,EL3-4) including fping and
rrdtool. You can either download the rpms manually or add dag to your
yum.conf so you can just do "yum install rrdtool" and it will
automatically grab the dependencies too.
Note I don't recommend this method for everyone...some people are paranoid
(rightfully so if security is a concern) and refuse to install binary
releases and only install manually from tarballs.
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