Zookeeper Monitoring User Guide

Overview

Zookeeper monitoring is a Gateway configuration file that enables monitoring of the Zookeeper Replicas through a set of samplers with customised JMX plug-in settings.

Zookeeper is a distributed process that allows deployment configurations and can be used as a container manager. It has a built-in load balancing capability that can manage multiple services in different machines simultaneously.

Track the following key areas when using Zookeeper monitoring:

Key Area	Description
Replica configuration	Refers to the configuration settings the users can set.
Replica statistics	Replica metrics that provide information about the overall health of the Zookeeper Ensemble.

To view the sample metrics and dataviews, see ZookeeperMonitoring Technical Reference.

Intended audience

This guide is intended for users who are setting up, configuring, troubleshooting and maintaining this integration. Once the integration is set up, the samplers providing the dataviews become available to that Gateway.

As a user, you should be familiar with Java or any other database, and with the administration of the Zookeeper services.

Prerequisites

The following requirements must be met prior to the installation and setup of the template:

A machine running the Netprobe must have access to the host where the Zookeeper instance is installed and the port Zookeeper is listening to.
Netprobe 4.6 or higher.
Gateway 4.8 or higher.
Zookeeper 3.4.11.

Installation procedure

Ensure that you have read and can follow the system requirements prior to installation and setup of this integration template.

Download the integration package geneos-integration-zookeeper-<version>.zip from the ITRS Downloads site.
Open Gateway Setup Editor.
In the Navigation panel, click Includes to create a new file.
Enter the location of the file to include in the Location field. In this example, it is the include/ZookeeperMonitoring.xml.
Update the Priority field. This can be any value except 1. If you input a priority of 1, the Gateway Setup Editor returns an error.
Expand the file location in the Include section.
Select Click to load.
Click Yes to load the new Zookeeper include file.

Click Managed entities in the Navigation panel.
Add the Zookeeper-Replica type to the Managed Entity section that you will use to monitor Zookeeper.
Click the Validate button to check your configuration and save if everything is correct.

Set up the samplers

These are the pre-configured samplers available to use in ZookeeperMonitoring.xml.

Configure the required fields by referring to the table below:

Samplers
Zookeeper-ReplicaCfg
Zookeeper-ReplicaStats

Set up the variables

The ZookeeperMonitoring.xml template provides the following variables that are set in the Environments section:

Variable	Description
ZOOKEEPER_JMX_HOST	IP/Hostname of the Zookeeper Replica. Default: localhost Mandatory: Yes
ZOOKEEPER_JMX_PORT	JMX port of the Zookeeper Replica. Default: 6790 Mandatory: Yes
ZOOKEEPER_MYID	MYID of the Zookeeper Replica. Default: 1 Mandatory: Yes
ZOOKEEPER_MONITORING_GROUP_NAME	Sampler group name. Mandatory: No
ZOOKEEPER_REPLICA_CFG_SAMPLING_INTERVAL	Sampler interval of ReplicaCfg. Mandatory: No
ZOOKEEPER_REPLICA_STATS_SAMPLING_INTERVAL	Sampler interval of ReplicaStats. Mandatory: No

Set up the rules

The Zookeeper-SampleRules.xml template also provides a separate sample rules that you can use to configure the Gateway Setup Editor.

Your configuration rules must be set in the Includes section.

The table below shows the included rule set-up in the configuration file that sets the severity rules and triggers alerts to:

Rules	Description
Zookeeper-ReplicaStats-HighLatency	Monitor the server response time.
Zookeeper-ReplicaStats-HighOutstandingRequests	Detect any pending requests in the server, and if they exceed the provided limit.
Zookeeper-ReplicaStats-NoWatchers	Notify when the monitored Replica has no watchers.
Zookeeper-ReplicaStats-NoZNodes	Notify when the monitored Replica has no znodes.