Upgrade Zabbix 4.2.0. to 4.4.1

Stop Zabbix-Proxy processes

# systemctl stop zabbix-proxy

Stop Zabbix-Server processes

# systemctl stop zabbix-server
# systemctl stop zabbix-agent
# systemctl stop httpd

Back up the existing Zabbix database

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

# cp -R /usr/share/zabbix/ /opt/zabbix-backup/
# cp -R /usr/share/doc/zabbix-* /opt/zabbix-backup/

Update repository configuration package (Server y Proxy)

# rpm -Uvh https://repo.zabbix.com/zabbix/4.4/rhel/7/x86_64/zabbix-release-4.4-1.el7.noarch.rpm

Upgrade Zabbix Server components

# yum clean all
# yum repolist
# yum upgrade zabbix-server-pgsql zabbix-web-pgsql zabbix-agent

Upgrade Zabbix Proxy components

# rpm -Uvh https://repo.zabbix.com/zabbix/4.4/rhel/7/x86_64/zabbix-release-4.4-1.el7.noarch.rpm
# yum clean all
# yum repolist
# yum upgrade zabbix-proxy-sqlite3  zabbix-agent
# mv /database/sqlite3/zabbix.db /database/sqlite3/zabbix.db.4.2.0
# systemctl start zabbix-proxy
# systemctl start zabbix-agent
# systemctl status zabbix-proxy
# systemctl status zabbix-agent

NOTA: To upgrade the web frontend with Apache on RHEL 8 correctly, also run: # yum install zabbix-apache-conf

Review component configuration parameters (Server)

# systemctl start httpd
# systemctl start zabbix-server
# systemctl start zabbix-agent

Review component configuration parameters (Proxy)

# systemctl start zabbix-proxy