HTTP service fails under Ubuntu 14.04

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apache2 version 2.4 versus 2.2 (CORE expects 2.2)

Need to detect apache2 version from the service.

Feedback from Grant Orndorff:

I am using ubuntu 14.04 and that was actually the problem. It turns out in 
14.04 they updated the apache2 in the repositories from apache 2.2 to apache 
2.4.
This makes the apache config file generated by CORE invalid, because apache 2.4 
changed a lot of things. I would guess just reverting back to apache 2.2 would 
solve this issue, but I decided to figure out what was wrong with the config so 
that you would know.

My updated apache 2.4 config file for use in CORE looks like this.

# apache2.conf generated by utility.py:HttpService
Mutex file:${APACHE_LOCK_DIR} default
PidFile ${APACHE_PID_FILE}
Timeout 300
KeepAlive On
MaxKeepAliveRequests 100
KeepAliveTimeout 5

LoadModule mpm_worker_module /usr/lib/apache2/modules/mod_mpm_worker.so

<IfModule mpm_prefork_module>
    StartServers          5
    MinSpareServers       5
    MaxSpareServers      10
    MaxClients          150
    MaxRequestsPerChild   0
</IfModule>

<IfModule mpm_worker_module>
    StartServers          2
    MinSpareThreads      25
    MaxSpareThreads      75 
    ThreadLimit          64
    ThreadsPerChild      25
    MaxClients          150
    MaxRequestsPerChild   0
</IfModule>

<IfModule mpm_event_module>
    StartServers          2
    MinSpareThreads      25
    MaxSpareThreads      75 
    ThreadLimit          64
    ThreadsPerChild      25
    MaxClients          150
    MaxRequestsPerChild   0
</IfModule>

User ${APACHE_RUN_USER}
Group ${APACHE_RUN_GROUP}

AccessFileName .htaccess

<Files ~ "^\.ht">
    Require all denied
</Files>

DefaultType None

HostnameLookups Off

ErrorLog ${APACHE_LOG_DIR}/error.log
LogLevel warn

#Include mods-enabled/*.load
#Include mods-enabled/*.conf
LoadModule alias_module /usr/lib/apache2/modules/mod_alias.so
LoadModule auth_basic_module /usr/lib/apache2/modules/mod_auth_basic.so
LoadModule authz_core_module /usr/lib/apache2/modules/mod_authz_core.so
LoadModule authz_host_module /usr/lib/apache2/modules/mod_authz_host.so
LoadModule authz_user_module /usr/lib/apache2/modules/mod_authz_user.so
LoadModule autoindex_module /usr/lib/apache2/modules/mod_autoindex.so
LoadModule dir_module /usr/lib/apache2/modules/mod_dir.so
LoadModule env_module /usr/lib/apache2/modules/mod_env.so

NameVirtualHost *:80
Listen 80

<IfModule mod_ssl.c>
    Listen 443
</IfModule>
<IfModule mod_gnutls.c>
    Listen 443
</IfModule>

LogFormat "%v:%p %h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" 
vhost_combined
LogFormat "%h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" 
combined
LogFormat "%h %l %u %t \"%r\" %>s %O" common
LogFormat "%{Referer}i -> %U" referer
LogFormat "%{User-agent}i" agent

ServerTokens OS
ServerSignature On
TraceEnable Off

<VirtualHost *:80>
ServerAdmin webmaster@localhost
DocumentRoot /var/www
<Directory />
Options FollowSymLinks
AllowOverride None
</Directory>
<Directory /var/www/>
Options Indexes FollowSymLinks MultiViews
AllowOverride None
Require all granted
</Directory>
ErrorLog ${APACHE_LOG_DIR}/error.log
LogLevel warn
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

Because of the new LoadModule at the top loading the mpm worker module, I don't 
believe some of the if clauses following are necessary but I left them in 
anyway.

With the above config file, apache works! 

Original issue reported on code.google.com by [email protected] on 22 Aug 2014 at 5:24