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How to enable leverage browser caching for Apache in Plesk

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Renan Moreira
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Plesk for Linux kb: how-to ABT: Group A

Applicable to:

  • Plesk for Linux

Question

How to enable leverage browser caching in Plesk?

Answer

For particular subscription
  1. Enable mod_expires: Plesk > Tools & Settings > Apache Web Server, tick expires > OK
  2. Go to Subscriptions > example.com > Apache & nginx Settings, add below to Additional directives for HTTP and Additional directives for HTTPS sections:

    CONFIG_TEXT: <IfModule mod_expires.c>
    ExpiresActive On
    FileETag None
    ExpiresDefault "access plus 14 days"
    ExpiresByType image/jpg "access plus 1 month"
    ExpiresByType image/gif "access plus 1 month"
    ExpiresByType image/jpeg "access plus 1 month"
    ExpiresByType image/png "access plus 1 month"
    ExpiresByType text/css "access plus 1 month"
    ExpiresByType application/pdf "access plus 1 month"
    ExpiresByType text/javascript "access plus 1 month"
    ExpiresByType text/x-javascript "access plus 1 month"
    ExpiresByType application/javascript "access plus 1 month"
    ExpiresByType application/x-shockwave-flash "access plus 1 month"
    ExpiresByType text/css "now plus 1 month"
    ExpiresByType image/ico "access plus 1 month"
    ExpiresByType image/x-icon "access plus 1 month"
    ExpiresByType text/html "access plus 1 days"
    </IfModule>

For the whole server

First of all, connect to the server using SSH.

For RHEL-based operating systems (CentOS, RHEL, CloudLinux, Virtuozzo Linux 7)

  1. Comment the line LoadModule expires_module modules/mod_expires.so in the file /etc/httpd/conf.modules.d/00-base.conf.

  2. Create the configuration file /etc/httpd/conf.d/expires.conf:

    # vi /etc/httpd/conf.d/expires.conf

  3. Insert the following content in it:

    CONFIG_TEXT: LoadModule expires_module modules/mod_expires.so
    ExpiresActive on
    ExpiresDefault "access plus 14 days"
    ExpiresByType image/jpg "access plus 1 month"
    ExpiresByType image/gif "access plus 1 month"
    ExpiresByType image/jpeg "access plus 1 month"
    ExpiresByType image/png "access plus 1 month"
    ExpiresByType text/css "access plus 1 month"
    ExpiresByType application/pdf "access plus 1 month"
    ExpiresByType text/javascript "access plus 1 month"
    ExpiresByType text/x-javascript "access plus 1 month"
    ExpiresByType application/javascript "access plus 1 month"
    ExpiresByType application/x-shockwave-flash "access plus 1 month"
    ExpiresByType text/css "now plus 1 month"
    ExpiresByType image/ico "access plus 1 month"
    ExpiresByType image/x-icon "access plus 1 month"
    ExpiresByType text/html "access plus 1 days"

  4. Add the following line to the file /etc/httpd/conf/httpd.conf:

    CONFIG_TEXT: FileETag None

  5. Apply the configuration changes:

    # service httpd reload

  6. Validate the Apache configuration:

    # httpd -t
    Syntax OK

  7. Check that the module is loaded:

    # httpd -M | grep expires
    expires_module (shared)

For Debian and Ubuntu

  1. Add the following content into the file /etc/apache2/mods-available/expires.load:

    CONFIG_TEXT: ExpiresActive on
    ExpiresDefault "access plus 14 days"
    ExpiresByType image/jpg "access plus 1 month"
    ExpiresByType image/gif "access plus 1 month"
    ExpiresByType image/jpeg "access plus 1 month"
    ExpiresByType image/png "access plus 1 month"
    ExpiresByType text/css "access plus 1 month"
    ExpiresByType application/pdf "access plus 1 month"
    ExpiresByType text/javascript "access plus 1 month"
    ExpiresByType text/x-javascript "access plus 1 month"
    ExpiresByType application/javascript "access plus 1 month"
    ExpiresByType application/x-shockwave-flash "access plus 1 month"
    ExpiresByType text/css "now plus 1 month"
    ExpiresByType image/ico "access plus 1 month"
    ExpiresByType image/x-icon "access plus 1 month"
    ExpiresByType text/html "access plus 1 days"

  2. Make a symbolic link to that file in the directory /etc/apache2/mods-enabled/:

    # cd /etc/apache2/mods-enabled/ && ln -s ../mods-available/expires.load expires.load

  3. Add the following line to the file /etc/apache2/apache2.conf:

    CONFIG_TEXT: FileETag None

  4. Apply the configuration changes:

    # service apache2 reload

  5. Validate the Apache configuration:

    # apache2ctl -t
    Syntax OK

  6. Check that the module is loaded:

    # apache2ctl -M | grep expires
    expires_module (shared)

Additional information

Depending on the type of content that is served, it might be required to enable caching for nginx too since different types of content is served by either nginx, or apache:

How to enable leverage browser caching for nginx?

Comments

19 comments

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  • Avatar
    Kingsley Felix

    what about mod_deflate? 

    I found the following tutorial but the line is not found.

     

    https://iserversupport.com/enable-compression-leverage-browser-caching-plesk-apache-nginx/#comment-125087

    https://linuxtechme.wordpress.com/2012/11/04/enable-http-compression-leverage-browser-caching-on-a-plesk-linux-server/

    https://alpha-computer-services.acshostings.com/tag/plesk-onyx-leverage-browser-caching/

     

    Can you give a tutorial on this? also this tutorial did not work as apache failed to start

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  • Avatar
    Vitaly Zhidkov

    @iamkingsleyf, you can enable mod_deflate module from Plesk > Tools & Settings > Apache Web Server

    > also this tutorial did not work as apache failed to start

    Can you share the error message?

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  • Avatar
    Kingsley Felix

    Because after adding your code apache failed to start with an error

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  • Avatar
    Vitaly Zhidkov

    @iamkingsleyf, what exact message was shown? You can find it under /var/log/httpd/error_log

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  • Avatar
    Kingsley Felix

    its passed now so i can't recall

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  • Avatar
    Stuart de Usoz

    Alexander, I'm running Plesk Onyx on Centos, and I followed your instructions and it works fine, thank you. However, I am wondering about "ETag none"  as I'm trying to find best way to always serve image files that have been modified yet cache may still be holding unmodified version.  I just was reading about using ETag and I remembered that I turned it off by following this instruction.   So, will these instructions still work if I remove "ETag none" ?  or do you have suggestion using Apache to always serve modified content?

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  • Avatar
    Artyom Baranov

    @Stuart de Usoz,

    Hello! You may remove "FileETag None" from Apache config file. As far as I know, 'mod_expires' should not conflict with 'ETag'

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  • Avatar
    IONOS Support

    Error on first step "path must precede expression"

     

    See attachment.

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  • Avatar
    Artyom Baranov

    @1and1 Internet,

    Hello! You should use only the command from step #1:

    # find / -name mod_expires.so

    And `/usr/lib64/httpd/modules/mod_expires.so` is it's output.

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  • Avatar
    Armin Wucherer

    Hi I have a Ubuntu enviroment and it does not work. 

    If I try the second thing I get already a error: # find / -name mod_expires.so
    find: '/sys/kernel/security/ima': Permission denied
    find: '/sys/kernel/security/apparmor': Permission denied
    find: '/sys/kernel/debug': Permission denied

    nevermind it is in /usr/lib/apache2/modules/mod_expires.so

    #3 would be # vi /etc/apache2/plesk.conf.d/expires.conf

    #4 interestingly there you have the right path

    #5 tried with that string and without

    #6 and #7 no error works fine

    #8 mod_expires does not apear in the list of loaded Apache modules

     

    any idea what I can do next? 

     

    cheers,  Armin 

     

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  • Avatar
    Armin Wucherer

    just found the solution: move /etc/apache2/plesk.conf.d/expires.conf to /etc/apache2/conf-available/expires.conf and than link it in /etc/apache2/conf-enabled/expires.conf to the available conf file restart apache2 and it works fine

     

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  • Avatar
    Ivan Postnikov

    @Armin Wucherer

    I am glad the solution is found.
    The solution for Ubuntu will be added to this article

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  • Avatar
    Ashkan Nasiri

    This KB guide us to enable "Leverage browser caching" on server level. However we want to make it domain level. 

    How can we achieve domain level "Leverage browser caching"?

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  • Avatar
    Pavel Rozental

    @Ashkan Nasiri

    I have added this information to the article, check it.

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  • Avatar
    lenala

    Where is the guide "For particular subscription" ??? Because I don't think this is correct :

    For RHEL-based operating systems (CentOS, RHEL, CloudLinux, Virtuozzo Linux 7)

    1. Comment the line LoadModule expires_module modules/mod_expires.so in the file /etc/httpd/conf.modules.d/00-base.conf.

    2. Create the configuration file /etc/httpd/conf.d/expires.conf:

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  • Avatar
    Anton Maslov

    @lenala thank you for noticing, article was fixed!

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  • Avatar
    El fadili bouchta

    what about the mode with nginx

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  • Avatar
    Ivan Postnikov

    Hello El fadili bouchta

    Here is the link to requested instruction: https://support.plesk.com/hc/en-us/articles/115001374153-How-to-enable-leverage-browser-caching-for-nginx-

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  • Avatar
    Md Ashraf Malik (Edited )

    To enable leverage browser caching on Apache, please follow these simple steps:

    1. Login into your Cpanel.
    2. Locate the .htaccess file in the root directory.
    3. Open the .htaccess file in your web browser.
    4. Append IfModule code in your .htaccess file provided below.
    5. Finally, save the .htaccess file and test results.

    <IfModule mod_expires.c>
    ExpiresActive On
    ExpiresByType image/jpg "access 1 year"
    ExpiresByType image/jpeg "access 1 year"
    ExpiresByType image/gif "access 1 year"
    ExpiresByType image/png "access 1 year"
    ExpiresByType text/css "access 1 month"
    ExpiresByType application/pdf "access 1 month"
    ExpiresByType application/x-javascript "access 1 month"
    ExpiresByType application/x-shockwave-flash "access 1 month"
    ExpiresByType image/x-icon "access 1 year"
    ExpiresDefault "access 2 days"
    </IfModule>

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