How to install OpenLiteSpeed on a DirectAdmin server

I want to have OpenLiteSpeed server on a server with DirectAdmin. How can I do it?

Information

OpenLiteSpeed is the Open Source edition of LiteSpeed Web Server Enterprise with fewer processes, less overhead, and enormous scalability in comparison with other popular web-servers. 

OpenLiteSpeed is mod_rewrite compatible, with no new syntax to learn. Built-in full-page cache module is highly-customizable and efficient for an exceptional user experience.

Experience a measurable performance boost with OpenLiteSpeed and LSCache for WordPress.

OLS comes with a built-in WebAdmin GUI as shown below:

So if you decided to use it, here is a guide on how to install it.

Installation Guide

At the moment CustomBuild 2.0 offers OpenLiteSpeed for early testing! It's announced DirectAdmin 1.56.5 should be installed for it:

Here is how can you get it installed with the help of CustomBuild once they introduce the full support of it.

On a CentOS server, first run this as root (it's a requirement): 

yum -y install udns-devel GeoIP-devel

Then do the following:

cd /usr/local/directadmin/custombuild
./build update && ./build clean
./build set webserver openlitespeed

for i in 1 2 3 4; do ./build set php${i}_mode lsphp; done;

./build openlitespeed
./build php
./build rewrite_confs

At this point if everything went fine you have Open Lite Speed installed on Directadmin server.

Example of running of the commands with expected results:

[root@poralix custombuild]# ./build set webserver openlitespeed
Changed webserver option from nginx_apache to openlitespeed
[root@poralix custombuild]#
[root@poralix custombuild]# for i in 1 2 3 4; do ./build set php${i}_mode lsphp; done;
Changed php1_mode option from php-fpm to lsphp
Changed php2_mode option from php-fpm to lsphp
Changed php3_mode option from php-fpm to lsphp
Changed php4_mode option from php-fpm to lsphp
[root@poralix custombuild]#
[root@poralix custombuild]# ./build openlitespeed
Downloading             openlitespeed-1.4.47.tgz...
--2019-04-25 11:57:07--  http://files7.directadmin.com/services/custombuild/openlitespeed/openlitespeed-1.4.47.tgz
Resolving files7.directadmin.com (files7.directadmin.com)... 141.138.151.26
Connecting to files7.directadmin.com (files7.directadmin.com)|141.138.151.26|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 43026159 (41M) [application/x-gzip]
Saving to: '/usr/local/directadmin/custombuild/openlitespeed-1.4.47.tgz'

... skipped ...
... skipped ...
... skipped ...

writing new private key to '/usr/local/lsws/ssl.key/server.key'
-----
Restarting litespeed.
[root@poralix custombuild]#
[root@poralix custombuild]# ./build rewrite_confs
Checking to ensure /usr/local/lsws/ssl.crt/server.ca is set.
Using 159.bb.cc.222 for your server IP
Restarting openlitespeed.
[root@poralix custombuild]#
[root@poralix custombuild]# ps aux | grep openlitespeed
root     13996  0.2  0.1  34288  4332 ?        S    12:00   0:00 openlitespeed (lshttpd - main)
root     14000  0.0  0.0  29616  1572 ?        S    12:00   0:00 openlitespeed (lscgid)
apache   14001  0.0  0.0  36528  2708 ?        S    12:00   0:00 openlitespeed (lshttpd - #01)
apache   14002  0.0  0.0  36660  3264 ?        S    12:00   0:00 openlitespeed (lshttpd - #02)
root     14026  0.0  0.0 110692   900 pts/1    S+   12:00   0:00 grep --color=auto openlitespeed
[root@poralix custombuild]#

If to open a browser and enter your server's IP address in an address bar and connect to it you should see "OpenLiteSpeed is functioning normally".

That's it for now.