1 Red Hat Enterprise Linux/CentOS

Overview

Make sure to read general information about upgrading first.

Upgrade procedure

1 Stop Zabbix processes

Stop Zabbix server to make sure that no new data is inserted into database.

# systemctl stop zabbix-server

If upgrading the proxy, stop proxy too.

# systemctl stop zabbix-proxy

It is known to be possible to upgrade the server only and have older, yet unupgraded proxies report data to a newer server (the proxies can't refresh their configuration though). This approach, however, is not recommended and not supported by Zabbix and choosing it is entirely at your own risk.

2 Back up the existing Zabbix database

This is a very important step. Make sure that you have a backup of your database. It will help if the upgrade procedure fails (lack of disk space, power off, any unexpected problem).

3 Back up configuration files, PHP files and Zabbix binaries

Make a backup copy of Zabbix binaries, configuration files and the PHP file directory.

Configuration files:

# mkdir /opt/zabbix-backup/
# cp /etc/zabbix/zabbix_server.conf /opt/zabbix-backup/
# cp /etc/httpd/conf.d/zabbix.conf  /opt/zabbix-backup/

PHP files and Zabbix binaries:

# cp -R /usr/share/zabbix/ /opt/zabbix-backup/
# cp -R /usr/share/doc/zabbix-* /opt/zabbix-backup/
4 Update repository configuration package

To proceed with the upgrade your current repository package has to be updated.

# rpm -Uvh https://repo.zabbix.com/zabbix/3.4/rhel/7/x86_64/zabbix-release-3.4-1.el7.centos.noarch.rpm
5 Upgrade Zabbix components

To upgrade Zabbix components you may run something like:

# yum upgrade zabbix-server-mysql zabbix-web-mysql zabbix-agent

If using PostgreSQL, substitute mysql with pgsql in the command. If upgrading the proxy, substitute server with proxy in the command.

6 Review component configuration parameters

See the upgrade notes for details on mandatory changes.

For new optional parameters, see the What's new section.

7 Start Zabbix processes

Start the updated Zabbix components.

# systemctl start zabbix-server
# systemctl start zabbix-proxy
# systemctl start zabbix-agent
8 Clear web browser cookies and cache

After the upgrade you may need to clear web browser cookies and web browser cache for the Zabbix web interface to work properly.

Upgrade between minor versions

It is possible to upgrade between minor versions of 3.4.x (for example, from 3.4.1 to 3.4.3). Upgrading between minor versions is easy.

To execute Zabbix minor version upgrade it is required to run:

$ sudo yum upgrade 'zabbix-*'

To execute Zabbix server minor version upgrade run:

$ sudo yum upgrade 'zabbix-server-*'

To execute Zabbix agent minor version upgrade run:

$ sudo yum upgrade 'zabbix-agent-*'

Note that you may also use 'update' instead of 'upgrade' in these commands. While 'upgrade' will delete obsolete packages, 'update' will preserve them.