How to use environment variable in apache config condition?

David

11/11/23, 6:44 PM

In my apache config file I'm trying to set a virtual host on port 443 IF my environment variable is not dev

I have a docker container running via docker-compose which specifies the environment variables.

To check the env variables are properly set, I remote into my container:

root@4f212c1c7e23:/var/www# echo ${APP_ENV}
prod

Below is the apache config file that is apart of the volume mapped to the container

000-default.conf:

<VirtualHost *:80>

  ServerName ${DOMAIN}
  ServerAdmin ${ADMIN_EMAIL}
  DocumentRoot /var/www/public

  ErrorLog ${APACHE_LOG_DIR}/error.log
  CustomLog ${APACHE_LOG_DIR}/access.log combined

</VirtualHost>

<IfModule "%{APP_ENV} != 'dev'">
  <IfModule mod_ssl.c>
    <VirtualHost *:443>

      ServerName ${DOMAIN}
      ServerAdmin ${ADMIN_EMAIL}
      DocumentRoot /var/www/public
            
      ErrorLog ${APACHE_LOG_DIR}/error.log
      CustomLog ${APACHE_LOG_DIR}/access.log combined
        
      SSLCertificateFile /var/imported/ssl/main.crt
      SSLCertificateKeyFile /var/imported/ssl/privkey.pem
      SSLEngine on

    </VirtualHost>
  </IfModule>
</IfModule>

But when starting the container on production, the result in browser is "ERR_SSL_PROTOCOL_ERROR" when trying to access port 443.

My error log only reads:

AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.26.0.2. Set the 'ServerName' directive globally to suppress this message

Similarly the expression "%{APP_ENV} == 'prod'", gives the same result

When deleting the outer IfModule in the apache config, the connection is accepted and everything works as expected.

So I'm wondering how to get the outer IfModule condition to behave as intended?

Please let me know if there is more info I can provide

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apache-2.4

docker-compose

apache2

David

11/11/23, 8:54 PM

I realize that `IfModule` is not doing what I think it does. I have instead opted to use `IfFile` which checks if main.crt exists (which is only copied in my production docker-compose file): `<IfFile "/var/imported/ssl/main.crt">` and this seems to work as I planned

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