Wednesday, 10 July 2019

Install LEPP Stack on RHEL 8 Server

Install LEPP Stack on RHEL 8 Server

LEPP Stack is a high performance and robust software service stack, used in large systems where data read and write speeds are crucial. It is a variation of  LAMP stack. In this variation, the Apache web server is replaced by Nginx and MySQL database is replaced by PostgreSQL.

In this article, we are installing LEPP Stack on Red Hat Enterprise Linux (RHEL) 8. We are using following LEPP stack components.

  • L - Red Hat Enterprise Linux (RHEL) 8
  • E - Nginx 1.14 Web Server
  • P - PostgreSQL 10.6 Database Server
  • P - PHP 7.2 Language Support

 

This Article Provides:

     

    Environment Specification:

    We have provisioned a RHEL 8 based virtual machine with following specifications.

    • CPU - 3.4 Ghz (2 cores)
    • Memory - 2 GB
    • Storage - 20 GB
    • Operating System - Red Hat Enterprise Linux (RHEL) 8
    • Hostname - rhel-8-lepp.example.com
    • IP Address - 192.168.116.165/24

    A Local YUM/DNF repository is also configured, so we can install required packages without having an active Red Hat subscription.

     

    Installing PostgreSQL 10.6 on RHEL 8 Server:

    Connect with rhel-8-lepp.example.com using ssh as root user.

    PostgreSQL Database Server 10.6 is available in our local AppStream repository. Therefore, we can install it using dnf command.

    [root@rhel-8-lepp ~]# dnf install -y postgresql-server Updating Subscription Management repositories. Unable to read consumer identity This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register. Last metadata expiration check: 0:18:49 ago on Sun 07 Jul 2019 09:57:50 PM PKT. Dependencies resolved. ================================================================================ Package Arch Version Repository Size ================================================================================ Installing: postgresql-server x86_64 10.6-1.module+el8+2469+5ecd5aae localyum_AppStream 5.1 M Installing dependencies: libpq x86_64 10.5-1.el8 localyum_AppStream 188 k postgresql x86_64 10.6-1.module+el8+2469+5ecd5aae localyum_AppStream 1.5 M Enabling module streams: postgresql 10 Transaction Summary ================================================================================ Install 3 Packages Total size: 6.7 M Installed size: 27 M Downloading Packages: Running transaction check Transaction check succeeded. Running transaction test Transaction test succeeded. Running transaction Preparing : 1/1 Installing : libpq-10.5-1.el8.x86_64 1/3 Installing : postgresql-10.6-1.module+el8+2469+5ecd5aae.x86_64 2/3 Running scriptlet: postgresql-server-10.6-1.module+el8+2469+5ecd5aae.x8 3/3 Installing : postgresql-server-10.6-1.module+el8+2469+5ecd5aae.x8 3/3 Running scriptlet: postgresql-server-10.6-1.module+el8+2469+5ecd5aae.x8 3/3 Verifying : libpq-10.5-1.el8.x86_64 1/3 Verifying : postgresql-10.6-1.module+el8+2469+5ecd5aae.x86_64 2/3 Verifying : postgresql-server-10.6-1.module+el8+2469+5ecd5aae.x8 3/3 Installed products updated. Installed: postgresql-server-10.6-1.module+el8+2469+5ecd5aae.x86_64 libpq-10.5-1.el8.x86_64 postgresql-10.6-1.module+el8+2469+5ecd5aae.x86_64 Complete!

    Initialize PostgreSQL database instance with following command.

    [root@rhel-8-lepp ~]# postgresql-setup --initdb --unit postgresql * Initializing database in '/var/lib/pgsql/data' * Initialized, logs are in /var/lib/pgsql/initdb_postgresql.log

    Enable and start PostgreSQL service.

    [root@rhel-8-lepp ~]# systemctl enable postgresql.service Created symlink /etc/systemd/system/multi-user.target.wants/postgresql.service â /usr/lib/systemd/system/postgresql.service. [root@rhel-8-lepp ~]# systemctl start postgresql.service

    Verify version of PostgreSQL database.

    Due to security, the execution of PostgreSQL commands by root user is not permitted. Therefore, we have to switch user to postgres user to execute PostgreSQL commands.

    [root@rhel-8-lepp ~]# su - postgres [postgres@rhel-8-lepp ~]$ postgres --version postgres (PostgreSQL) 10.6

    PostgreSQL has been installed on Red Hat Enterprise Linux (RHEL) 8.

     

    Installing Nginx 1.14 on RHEL 8:

    Nginx 1.14 is available in local AppStream repository. Therefore, we are installing it using dnf command.

    [root@rhel-8-lepp ~]# dnf install -y nginx ... Installed: nginx-1:1.14.1-8.module+el8+2505+fe936cef.x86_64 gd-2.2.5-6.el8.x86_64 jbigkit-libs-2.1-14.el8.x86_64 libX11-1.6.7-1.el8.x86_64 libX11-common-1.6.7-1.el8.noarch libXau-1.0.8-13.el8.x86_64 libXpm-3.5.12-7.el8.x86_64 libjpeg-turbo-1.5.3-7.el8.x86_64 libtiff-4.0.9-13.el8.x86_64 libwebp-1.0.0-1.el8.x86_64 libxcb-1.13-5.el8.x86_64 nginx-all-modules-1:1.14.1-8.module+el8+2505+fe936cef.noarch nginx-filesystem-1:1.14.1-8.module+el8+2505+fe936cef.noarch nginx-mod-http-image-filter-1:1.14.1-8.module+el8+2505+fe936cef.x86_64 nginx-mod-http-perl-1:1.14.1-8.module+el8+2505+fe936cef.x86_64 nginx-mod-http-xslt-filter-1:1.14.1-8.module+el8+2505+fe936cef.x86_64 nginx-mod-mail-1:1.14.1-8.module+el8+2505+fe936cef.x86_64 nginx-mod-stream-1:1.14.1-8.module+el8+2505+fe936cef.x86_64 dejavu-fonts-common-2.35-6.el8.noarch dejavu-sans-fonts-2.35-6.el8.noarch fontconfig-2.13.1-3.el8.x86_64 fontpackages-filesystem-1.44-22.el8.noarch perl-Carp-1.42-396.el8.noarch perl-Errno-1.28-416.el8.x86_64 perl-Exporter-5.72-396.el8.noarch perl-File-Path-2.15-2.el8.noarch perl-IO-1.38-416.el8.x86_64 perl-PathTools-3.74-1.el8.x86_64 perl-Scalar-List-Utils-3:1.49-2.el8.x86_64 perl-Socket-4:2.027-2.el8.x86_64 perl-Text-Tabs+Wrap-2013.0523-395.el8.noarch perl-Unicode-Normalize-1.25-396.el8.x86_64 perl-constant-1.33-396.el8.noarch perl-interpreter-4:5.26.3-416.el8.x86_64 perl-libs-4:5.26.3-416.el8.x86_64 perl-macros-4:5.26.3-416.el8.x86_64 perl-parent-1:0.237-1.el8.noarch perl-threads-1:2.21-2.el8.x86_64 perl-threads-shared-1.58-2.el8.x86_64 Complete!

    Enable and start Nginx service.

    [root@rhel-8-lepp ~]# systemctl enable nginx.service Created symlink /etc/systemd/system/multi-user.target.wants/nginx.service â /usr/lib/systemd/system/nginx.service. [root@rhel-8-lepp ~]# systemctl start nginx.service

    Allow HTTP service in Linux firewall.

    [root@rhel-8-lepp ~]# firewall-cmd --permanent --add-service=http success [root@rhel-8-lepp ~]# firewall-cmd --reload success

    Browse URL http://rhel-8-lepp.example.com in a client's browser.

    01-rhel-8-lemp-nginx-default-homepage

    Nginx web server has been installed on Red Hat Enterprise Linux (RHEL) 8.

     

    Installing PHP 7.2 on RHEL 8:

    PHP 7.2 is available in local AppStream repository. Therefore, we can install php and relevant packages using dnf command.

    [root@rhel-8-lepp ~]# dnf install -y php php-mysqlnd php-pdo php-gd php-mbstring php-fpm php-pgsql ... Installed: php-7.2.11-1.module+el8+2561+1aca3413.x86_64 php-fpm-7.2.11-1.module+el8+2561+1aca3413.x86_64 php-gd-7.2.11-1.module+el8+2561+1aca3413.x86_64 php-mbstring-7.2.11-1.module+el8+2561+1aca3413.x86_64 php-mysqlnd-7.2.11-1.module+el8+2561+1aca3413.x86_64 php-pdo-7.2.11-1.module+el8+2561+1aca3413.x86_64 php-pgsql-7.2.11-1.module+el8+2561+1aca3413.x86_64 apr-util-bdb-1.6.1-6.el8.x86_64 apr-util-openssl-1.6.1-6.el8.x86_64 apr-1.6.3-9.el8.x86_64 apr-util-1.6.1-6.el8.x86_64 httpd-2.4.37-10.module+el8+2764+7127e69e.x86_64 httpd-filesystem-2.4.37-10.module+el8+2764+7127e69e.noarch httpd-tools-2.4.37-10.module+el8+2764+7127e69e.x86_64 mod_http2-1.11.3-1.module+el8+2443+605475b7.x86_64 php-cli-7.2.11-1.module+el8+2561+1aca3413.x86_64 php-common-7.2.11-1.module+el8+2561+1aca3413.x86_64 mailcap-2.1.48-3.el8.noarch redhat-logos-httpd-80.7-1.el8.noarch Complete!

    Edit php-fpm configurations.

    [root@rhel-8-lepp ~]# vi /etc/php-fpm.d/www.conf

    Find and set following directives therein.

    user = nginx group = nginx listen.owner = nginx listen.group = nginx

    Adjust permissions on PHP directories.

    [root@rhel-8-lepp ~]# chgrp nginx /var/lib/php/{opcache,session,wsdlcache}

    Start and enable php-fpm service.

    [root@rhel-8-lepp ~]# systemctl enable php-fpm.service Created symlink /etc/systemd/system/multi-user.target.wants/php-fpm.service â /usr/lib/systemd/system/php-fpm.service. [root@rhel-8-lepp ~]# systemctl start php-fpm.service

    Restart httpd.service to integrate PHP with Nginx web server.

    [root@rhel-8-lepp ~]# systemctl restart nginx.service

    Create a PHP script to check PHP modules.

    [root@rhel-8-lepp ~]# echo "<?php phpinfo() ?>" > /usr/share/nginx/html/info.php

    Browse URL http://rhel-8-lemp.example.com/info.php in a client's browser.

    02-rhel-8-lepp-phpinfo

    PHP 7.2 has been installed and running on Red Hat Enterprise Linux (RHEL) 8.

    We have successfully installed LEPP stack on RHEL 8 server.

    Install LEPP Stack on RHEL 8 Server


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    2 comments:

    1. Notice that you don't have to change www.conf, keept it running on "apache" is perfectly fine, default configuration is designed to work out if the box with Apache or Nginx.

      Additional package (e.g. in EPEL, such as phpMyAdmin, Wordpress, ...) will rely on this settings

      More, if you change default user, you also need to change used state directory (see php_value directive at the end of the www.conf file).

      ReplyDelete