How to Install & Enable Zabbix Java Gateway?

Step 1 – Install & Enable Zabbix Java Gateway

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:

Centos/RHEL
$ rpm -Uvh https://repo.zabbix.com/zabbix/6.0/rhel/8/x86_64/zabbix-release-6.0-1.el8.noarch.rpm
$ yum install zabbix-java-gateway

Ubuntu
$ wget https://repo.zabbix.com/zabbix/6.0/ubuntu/pool/main/z/zabbix-release/zabbix-release_6.0-1+ubuntu20.04_all.deb
$ dpkg -i zabbix-release_6.0-1+ubuntu20.04_all.deb
$ apt install zabbix-java-gateway

Step 2 – Configuring Java gateway

Configuration parameters of Zabbix Java gateway may be tuned in the file:

/etc/zabbix/zabbix_java_gateway.conf

Step 3 - To start Zabbix Java gateway

$ service zabbix-java-gateway restart
$ systemctl enable zabbix-java-gateway

Step 4 – Configuring server for use with Java gateway

With Java gateway up and running, you have to tell Zabbix server where to find Zabbix Java gateway. This is done by specifying JavaGateway and JavaGatewayPort parameters in the server configuration file. 

server configuration file = /etc/zabbix/zabbix_server.conf

JavaGateway=192.168.3.14
JavaGatewayPort=10052

192.168.3.14 = is the IP address of the server where JavaGateway is running.

By default, server does not start any processes related to JMX monitoring. If you wish to use it, however, you have to specify the number of pre-forked instances of Java pollers. You do this in the same way you specify regular pollers and trappers.

StartJavaPollers=5

Note - Do not forget to restart server or proxy, once you are done with configuring them.

In the Zabbix server, activate at least one Java bollard, which "requests" the item data from the Java gateway and forwards the server process. After you make the changes, restart the Zabbix server.

$ zabbix_server -c /etc/zabbix/zabbix_server.conf -R config_cache_reload
$ zabbix_server -R config_cache_reload

Step 5 – Debugging Java gateway in Zabbix

Zabbix Java gateway log file is:
/var/log/zabbix/zabbix_java_gateway.log

If you like to increase the logging, edit the file:
/etc/zabbix/zabbix_java_gateway_logback.xml

and change level="info" to "debug" or even "trace" (for deep troubleshooting):
<configuration scan="true" scanPeriod="15 seconds">
[...]
      <root level="info">
              <appender-ref ref="FILE" />
      </root>
</configuration>

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Rajesh Kumar

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