An issue with php/apache is causing apache not to start in FreeBSD. It segfaults and core dumps, logged in the /var/log/httpd/error_log.
Try removing –with-openssl from your configure.php file and recompile php.

cd /usr/local/directadmin/customapache
vi configure.php
#remove –with-openssl from the file, save, exit.
./build clean
./build php n

Possibly a mod_perl issue. Edit the /etc/httpd/conf/httpd.conf
change:

AddModule mod_perl.c

to

#AddModule mod_perl.c

and then restart apache. If you don’t have "AddModule mod_perl.c", then don’t worry about this entry.
Remove the "LoadModule perl_module /usr/lib/apache/mod_perl.so" if you have it as well.
This won’t affect files in the cgi-bin (I’ve seen very few people actually making use of mod_perl itself).
more info:
Previous workaround for the problem is to remove thp php flags from the httpd.conf files:

cd /usr/local/directadmin/data/templates
cp virtual_host*.conf custom
cd custom
perl -pi -e ‘s/php_admin/#php_admin/’ *
echo "action=rewrite&value=httpd" >> /usr/local/directadmin/data/task.queue
/usr/local/directadmin/dataskq d
/usr/local/etc/rc.d/httpd restart

One user reported that installing zend solved this problem as well, so try:

cd /usr/local/directadmin/customapache
./build zend

Possibly have to downgrade zend to 2.5.7 from 2.6.2 as well as the zend binaries may not be backwards compatible.
To downgrade to apache 1.3.33 and php 4.3.11, run:

cd /usr/local/directadmin/customapache
./build clean
perl -pi -e ‘s/1.3.34/1.3.33/’ build
perl -pi -e ‘s/1.3.34/1.3.33/’ configure.apache_ssl
perl -pi -e ‘s/2.8.25/2.8.24/’ build
perl -pi -e ‘s/4.4.1/4.3.11/’ build
./build update_data
./build all d

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LAMP is a popular open source web platform commonly used to run dynamic web sites and servers. It includes Linux, Apache, MySQL, and PHP/Python/Perl and is considered by many the platform of choice for development and deployment of high performance web applications which require a solid and reliable foundation.

This appliance includes all the standard features in TurnKey Core, and on top of that:
SSL support out of the box.
PHP, Python and Perl support for Apache2 and MySQL.
PHPMyAdmin administration frontend for MySQL (listening on port 12322 – uses SSL).
Postfix MTA (bound to localhost) to allow sending of email from web applications (e.g., password recovery)
Webmin modules for configuring Apache2, PHP, MySQL and Postfix.

A separate LAPP stack appliance features PostgreSQL instead of MySQL.

this program also available on our VPS images.

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Chance are, if apache isn’t starting and isn’t logging anything, the error_log is full preventing apache from starting. To double check that, run:

cd /var/log/httpd
ls -lS | less

If any file is around 2-3 gig (or more), then chances are, that’s the problem.
The solution is to remove the logs, restart apache, and then implement preventative measures.
1)

cd /var/log/httpd/
rm -f error_log
rm -f access_log
rm -f suexec_log
rm -f fpexec_log
/sbin/service httpd restart ("/usr/local/etc/rc.d httpd restart" for FreeBSD)

2) Get logrota to rotate daily

perl -pi -e ‘s/weekly/daily/’ /etc/logrotate.conf
perl -pi -e ‘s/rotate 4/rotate 2/’ /etc/logrotate.conf

If apache still doesn’t start, check /var/log/messages and try recompiling apache.

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A few things that could cause that are:
Possible Causes:
1) MaxClients set to a value too low
2) If you have over about 800 VirtualHost entries (domains, subdomain, ssl, etc.. ), the ErrorLog files open too many file descriptors and apache won’t be able to log the errors and may stop responding. This number can vary per box depending on the limit, and setup of the system. (lower/higher)
Solutions:
1) edit /etc/httpd/conf/httpd.conf and increase the MaxClients setting to something like 200 or 300.
2)

cd /usr/local/directadmin/data/templates
cp virtual_host*.conf custom
cd custom

# remove all the ErrorLog lines (or comment them out) from the 4 virtual_host*.conf files that are in the custom directory.

perl -pi -e ‘s/Error/#Error/’ virtual_host*.conf
echo "action=rewrite&value=httpd" >> /usr/local/directadmin/data/task.queue

Apache should be restarted automatically after a few minutes later (rewrite might take a while with over 800 sites).
If that’s not enough to lower the limit and the problem persists, also try commenting out the CustomLog entries:

perl -pi -e ‘s/CustomLog/#CustomLog/’ virtual_host*.conf

and repeat the above echo command to rewrite the httpd.conf files.
3) Other possible information:
Edit /usr/include/bits/typesizes.h and set
#define __FD_SETSIZE 32768
and then recompile with customapache or custombuild.
On FreeBSD, it’s /usr/include/sys/select.h or /usr/include/sys/types.h
Change:
#define FD_SETSIZE 1024U
to
#define FD_SETSIZE 32768U
then recompile apache/php
4) edit /etc/sysctl.conf and add:
fs.file-max = 32768
and run:

/sbin/sysctl -w fs.file-max=32768
/sbin/sysctl -w kern.maxfiles=32768
/sbin/sysctl -w kern.maxfilesperproc=32768

then recompile apache/php
Other possible entires for the sysctl.conf:
kern.maxfiles = 32768
kern.maxfilesperproc = 32768
5) Another way to free up FileDescriptors (FDs) is to disable ssl on any domain that does not require it.
A quck way to check is to type:

ls -la /home/*/domains/*/private_html/index.html

quickly scan the list for any index.html that isn’t betwen 200-300 bytes in size. Any that are not in that range will have been edited and the user is probably using ssl, so take note of those usernames and domains. Now, the quick way to do a mass SSL shutoff for domains is to type:

perl -pi -e ‘s/ssl=ON/ssl=OFF/’ /usr/local/directadmin/data/users/*/domains/*.conf

Then turn ssl=ON back on for any users who need it. Note that this is an end user level setting, so they have the ability to turn it back on themselves via Domain Setup. Then type the action=rewrite&value=httpd command as mentioned in step 2 above.
What this does is reduced the number of FD’s by 50%. Since many people rarely use SSL, disabling it reduceds half of all virtualhosts, since all domains, subdomains, etc.. have 2 virtualhosts each with ssl, and only 1 each without ssl.
6) Openssl bug. Either update openssl and recompile apache, or patch apache 2:
http://issues.apache.org/bugzilla/show_bug.cgi?id=43717

---

Related error messages:
[error] System: Too many open files in system (errno: 23)
host: isc_socket_create: not enough free resources socket.c:2117: REQUIRE(maxfd <= (int)1024) failed.
host: isc_socket_create: not enough free resources

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This means that the cgi script did not execute properly. There are several causes that can generate this error so a few things would need to be checked.
1) check the /var/log/httpd/suexec_log. It contains any errors that would be as a result of not having correct permissions on the file. The file needs to be in a cgi-bin and must have the owner/group as the username who owns the site. If it’s owned by anyone else, it will not run. Also, the script must have execute permission. The most common chmod permission is 755. Go through all directories from the public_html down to the directory the script is in, and make sure they’re all set to 755 (public_html can be 750 *only* if it has a group of apache).
If the suexec_log only shows the script being run, then the cause may be with the script code itself. The easiest way to figure out script coding problems is to first run the script manually from an ssh prompt.

cd /home/username/domains/domain.com/public_html/cgi-bin
./script.cgi

One common error is to use an incorrect interpreter. The 2 most common interpreters are:

#!/usr/bin/perl

and

#!/usr/local/bin/php

This code must appear on the first line of the script. Sometimes a file is uploaded in windows format so the trailing newline (return) character is formed incorrectly and the file would need to be re uploaded in a different format.
Other errors that would be generated when running the script manually from ssh would be missing perl modules, in which case you’ll need to install them yourself. Cpan is the easiest method to install new perl modules, e.g.:

perl -e shell -MCPAN
install Bundle::DBD::mysql

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