How to debug an apache virtual host configuration?
Solution 1
Syntax check
To check configuration files for syntax errors:
# Red Hat-based (Fedora, CentOS), Arch-based and OSX
httpd -t
# Debian-based (Ubuntu)
apache2ctl -t
# MacOS
apachectl -t
List virtual hosts
To list all virtual hosts, and their locations:
# Red Hat-based (Fedora, CentOS), Arch-based and OSX
httpd -S
# Debian-based (Ubuntu)
apache2ctl -S
# MacOS
apachectl -S
Solution 2
Here's a command I think could be of some help :
apachectl -t -D DUMP_VHOSTS
You'll get a list of all the vhosts, you'll know which one is the default one and you'll make sure that your syntax is correct (same as apachectl configtest suggested by yojimbo87).
You'll also know where each vhost is declared. It can be handy if your config files are a mess. ;)
Solution 3
If you are trying to debug your virtual host configuration, you may find the Apache -S command line switch useful. That is, type the following command:
httpd -S
This command will dump out a description of how Apache parsed the configuration file. Careful examination of the IP addresses and server names may help uncover configuration mistakes. (See the docs for the httpd program for other command line options).
Solution 4
I had a new VirtualHost configuration file that was not showing when using the apachectl -S
command. After much head scratching I realised that my file did not have suffix ".conf". Once I renamed the file with that suffix my Vhost started showing and working!
Solution 5
First check out config files for syntax errors with apachectl configtest
and then look into apache error logs.
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GaetanZ
Updated on December 14, 2021Comments
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GaetanZ almost 2 years
Once again, I have a problem with my apache virtual host configuration. (The default configuration is used instead of my specific one).
The problem is not really the misconfiguration but how to solve it.
Does anyone has good advices to do resolve this kind of problem quickly?
Some more informations.
The default conf file is this one:
NameVirtualHost * <VirtualHost *> ServerAdmin webmaster@localhost DocumentRoot /var/www/ <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> ErrorLog /var/log/apache2/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog /var/log/apache2/access.log combined ServerSignature On Alias /doc/ "/usr/share/doc/" <Directory "/usr/share/doc/"> Options Indexes MultiViews FollowSymLinks AllowOverride None Order deny,allow Deny from all Allow from 127.0.0.0/255.0.0.0 ::1/128 </Directory> </VirtualHost>
And the virtual host config that doesn't apply is this one:
<VirtualHost *:*> ProxyPreserveHost On ProxyPass / http://ip.ip.ip.ip:8088/ ProxyPassReverse / http://ip.ip.ip.ip:8088/ ServerName wiki.mydomain.com </VirtualHost>
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GaetanZ over 12 yearsI have no syntax error because my server reboot and reload the configuration without any problem. I don't know in which log I could find details about my configuration.
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yojimbo87 over 12 yearsError logs are usually located in '/var/log/apache2/error.log' file.
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Larry Silverman almost 11 yearsYou can also use "apache2ctl -t".
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aron.duby almost 9 years
-S
is a synonym for-t -D DUMP_VHOSTS
so those two are the same -
Jahmic almost 8 yearsFor Windows, (if you are using xampp), you have these same commands at: \xampp\apache\bin
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Lg102 almost 8 yearsFor Wamp:
c:\\wamp\\bin\\apache\\apache2.4.9\\bin\\httpd.exe -S
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Loenix almost 7 yearsThat's very useful, thank you but it is not enough, I got some trouble with a vhost that it should be used and is not, i dont know why, I wish to get logs about how apache choose the vhost.
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David Spector almost 6 yearsIs there any way to make Apache add a message to the error file or elsewhere when an actual access comes in for a virtual or main host giving dynamic information about which host was chosen? I have tried LoadModule log_debug_module modules/mod_log_debug.so ... LogMessage "Debug 1" hook=all
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David McNeill over 3 yearsGood answer, help me find similar issue. All syntax and -S vhosts correct, still wrong site served. Turned out to be :80 and :443 has the same access log file, which seemed to confuse things. Separate file for each port, and sites started working.
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Rubén Ruíz over 2 yearswindows found this (on git basch console): ./httpd.exe -S