1 Red Hat Enterprise Linux

Overview

Official Zabbix 6.4 packages for Red Hat Enterprise Linux versions 6, 7, 8, and 9 and Oracle Linux versions 8 and 9 are available for download.

Packages are available with:

• MySQL or PostgreSQL database
• Apache or Nginx web server support

Note that separate packages for Zabbix agent, the Zabbix get and Zabbix sender utilities are available for RHEL 6, 7, 8, and 9. The same packages can be used to install Zabbix components on Alma Linux and Rocky Linux.

The official Zabbix repository provides fping, iksemel and libssh2 packages as well. These packages are located in the non-supported directory.

[epel]
       ...
       excludepkgs=zabbix*

Notes on installation

See installation instructions per platform in the download page for:

• installing the repository
• installing server/agent/frontend
• creating initial database, importing initial data
• configuring database for Zabbix server
• configuring PHP for Zabbix frontend
• starting server/agent processes
• configuring Zabbix frontend

If you want to run Zabbix agent as root, see Running agent as root.

Zabbix web service process, which is used for scheduled report generation, requires Google Chrome browser. The browser is not included into packages and has to be installed manually.

Importing data with Timescale DB

With TimescaleDB, in addition to the import command for PostgreSQL, also run:

# cat /usr/share/zabbix-sql-scripts/postgresql/timescaledb.sql | sudo -u zabbix psql zabbix

SELinux configuration

Zabbix uses socket-based inter-process communication. On systems where SELinux is enabled, it may be required to add SELinux rules to allow Zabbix create/use UNIX domain sockets in the SocketDir directory. Currently socket files are used by server (alerter, preprocessing, IPMI) and proxy (IPMI). Socket files are persistent, meaning they are present while the process is running.

Having SELinux status enabled in enforcing mode, you need to execute the following commands to enable communication between Zabbix frontend and server:

RHEL 7 and later:

# setsebool -P httpd_can_connect_zabbix on
       If the database is accessible over network (including 'localhost' in case of PostgreSQL), you need to allow Zabbix frontend to connect to the database too:
       # setsebool -P httpd_can_network_connect_db on

RHEL prior to 7:

# setsebool -P httpd_can_network_connect on
       # setsebool -P zabbix_can_network on

After the frontend and SELinux configuration is done, restart the Apache web server:

# service httpd restart

In addition, Zabbix provides the zabbix-selinux-policy package as part of source RPM packages for RHEL 8 and RHEL 7. This package provides a basic default policy for SELinux and makes zabbix components work out-of-the-box by allowing Zabbix to create and use sockets and enabling httpd connection to PostgreSQL (used by frontend).

The source zabbix_policy.te file contains the following rules:

module zabbix_policy 1.2;
       
       require {
         type zabbix_t;
         type zabbix_port_t;
         type zabbix_var_run_t;
         type postgresql_port_t;
         type httpd_t;
         class tcp_socket name_connect;
         class sock_file { create unlink };
         class unix_stream_socket connectto;
       }
       
       #============= zabbix_t ==============
       allow zabbix_t self:unix_stream_socket connectto;
       allow zabbix_t zabbix_port_t:tcp_socket name_connect;
       allow zabbix_t zabbix_var_run_t:sock_file create;
       allow zabbix_t zabbix_var_run_t:sock_file unlink;
       allow httpd_t zabbix_port_t:tcp_socket name_connect;
       
       #============= httpd_t ==============
       allow httpd_t postgresql_port_t:tcp_socket name_connect;

This package has been created to prevent users from turning off SELinux because of the configuration complexity. It contains the default policy that is sufficient to speed up Zabbix deployment and configuration. For maximum security level, it is recommended to set custom SELinux settings.

Proxy installation

Once the required repository is added, you can install Zabbix proxy by running:

# dnf install zabbix-proxy-mysql zabbix-sql-scripts

Substitute 'mysql' in the commands with 'pgsql' to use PostgreSQL, or with 'sqlite3' to use SQLite3 (proxy only).

The package 'zabbix-sql-scripts' contains database schemas for all supported database management systems for both Zabbix server and Zabbix proxy and will be used for data import.

Creating database

Create a separate database for Zabbix proxy.

Zabbix server and Zabbix proxy cannot use the same database. If they are installed on the same host, the proxy database must have a different name.

Importing data

Import initial schema:

# cat /usr/share/zabbix-sql-scripts/mysql/proxy.sql | mysql -uzabbix -p zabbix

For proxy with PostgreSQL (or SQLite):

# cat /usr/share/zabbix-sql-scripts/postgresql/proxy.sql | sudo -u zabbix psql zabbix
       # cat /usr/share/zabbix-sql-scripts/sqlite3/proxy.sql | sqlite3 zabbix.db

Configure database for Zabbix proxy

Edit zabbix_proxy.conf:

# vi /etc/zabbix/zabbix_proxy.conf
       DBHost=localhost
       DBName=zabbix
       DBUser=zabbix
       DBPassword=<password>

In DBName for Zabbix proxy use a separate database from Zabbix server.

In DBPassword use Zabbix database password for MySQL; PostgreSQL user password for PostgreSQL.

Use DBHost= with PostgreSQL. You might want to keep the default setting DBHost=localhost (or an IP address), but this would make PostgreSQL use a network socket for connecting to Zabbix. See SELinux configuration for instructions.

Starting Zabbix proxy process

To start a Zabbix proxy process and make it start at system boot:

# service zabbix-proxy start
       # systemctl enable zabbix-proxy

Frontend configuration

A Zabbix proxy does not have a frontend; it communicates with Zabbix server only.

Java gateway installation

It is required to install Java gateway only if you want to monitor JMX applications. Java gateway is lightweight and does not require a database.

Once the required repository is added, you can install Zabbix Java gateway by running:

# dnf install zabbix-java-gateway

Proceed to setup for more details on configuring and running Java gateway.

Installing debuginfo packages

To enable debuginfo repository, edit /etc/yum.repos.d/zabbix.repo file. Change enabled=0 to enabled=1 for zabbix-debuginfo repository.

[zabbix-debuginfo]
       name=Zabbix Official Repository debuginfo - $basearch
       baseurl=http://repo.zabbix.com/zabbix/6.4/rhel/7/$basearch/debuginfo/
       enabled=0
       gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-ZABBIX-A14FE591
       gpgcheck=1

This will allow you to install the zabbix-debuginfo package.

# dnf install zabbix-debuginfo

This single package contains debug information for all binary Zabbix components.