ssl - How to install mod_ssl for Apache httpd?

Question

Ok

So I installed Apache httpd a while ago and have recently come back to it to try setup SSL and get it serving several different tomcat servers.

At the moment I have two completely separate Tomcat instances serving up to slightly different versions (one for dev and one for demo say) my web app to two different ports:

• example.com:8081
• example.com:8082

I've successfully (back in Jan) used mod_jk to get httpd to serve those same Tomcat instances to http://www.example.com:8090/dev and http://www.example.com:8090/demo (8090 cos I've got another app running on 8080 via Jetty at this stage) using the following code in httpd.conf:

LoadModule jk_module modules/mod_jk.so
JkWorkersFile conf/workers.properties
JkLogFile logs/mod_jk.log
JkLogLevel debug

<VirtualHost *:8090>
    JkMount /devd* tomcatDev
    JkMount /demo* tomcatDemo
</VirtualHost>

What I'm not trying to do is enable SSL.

I've added the following to httpd.conf:

Listen 443
<VirtualHost _default_:443>
    JkMount /dev* tomcatDev
    JkMount /demo* tomcatDemo
    SSLEngine on
    SSLCertificateFile "/opt/httpd/conf/localhost.crt"
    SSLCertificateKeyFile "/opt/httpd/conf/keystore.key"
</VirtualHost>

But when I try to restart Apache with apachectl restart (yes after shutting down that other app I mentioned so it doesn't toy with https connections) I continuously get the error:

Invalid command 'SSLEngine', perhaps misspelled or defined by a module not included in the server configuration. httpd not running, trying to start

I've looked in the httpd/modules dir and indeed there is no mod_ssl, only mod_jk.so and httpd.exp.

I've tried using yum to install mod_ssl, it says its already installed. Indeed I can locate mod_ssl.so in /usr/lib/httpd/modules but this is NOT the path to where I've installed httpd which is /opt/httpd and in fact /usr/lib/httpd contains nothing but the modules dir.

Can anyone tell me how to install mod_ssl properly for my installed location of httpd so I can get past this error?

Answer 1

I found I needed to enable the SSL module in Apache (obviously prefix commands with sudo if you are not running as root):

a2enmod ssl

then restart Apache:

/etc/init.d/apache2 restart

More details of SSL in Apache for Ubuntu / Debian here.