title: How to restart apache2 without terminating docker container?
body: <p>I am using as a base the <a href="https://hub.docker.com/_/php/" rel="noreferrer">php docker container</a> with the tag:</p>
  
  <pre><code>php:5.6-apache
  </code></pre>
  
  <p>When I try to restart the apache2 inside the container, the container stops:</p>
  
  <pre><code>root@phalconapp:/var/www/html# service apache2 restart
  Restarting web server: apache2Terminated
  root@phaclonapp:/var/www/html#
  me@myLocalComputer:
  </code></pre>
  
  <p>How to restart apache2 without stopping the container?</p>
  
  <p>I want to play around with the container and customize it, before I put my changes into the dockerfile. I want to install some extension and for them to work I need to restart apache for the changes to take effect.</p>
  
  <p>This is the log file via:</p>
  
  <pre><code>Attaching to dltasklight_phlaconapp_1
  phlaconapp_1 | AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.17.0.2. Set the 'ServerName' directive globally to suppress this message
  phlaconapp_1 | AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.17.0.2. Set the 'ServerName' directive globally to suppress this message
  phlaconapp_1 | [Mon May 30 10:19:24.556154 2016] [mpm_prefork:notice] [pid 1] AH00163: Apache/2.4.10 (Debian) PHP/5.6.22 configured -- resuming normal operations
  phlaconapp_1 | [Mon May 30 10:19:24.556181 2016] [core:notice] [pid 1] AH00094: Command line: 'apache2 -D FOREGROUND'
  phlaconapp_1 | [Mon May 30 10:21:11.754993 2016] [mpm_prefork:notice] [pid 1] AH00169: caught SIGTERM, shutting down
  dltasklight_phlaconapp_1 exited with code 0
  </code></pre>