Zookeeper Component Installation and Configuration

This procedure describes how to install and configure the Apache Zookeeper component for use with the meshIQ Platform.

1. Download the latest version of the Zookeeper component Apache ZooKeeper-3.9.5-bin.tar.gz from https://zookeeper.apache.org/releases.html and place the file in $APIN_HOME/zookeeper.
   or
   Use the Zookeeper setup provided with the Deployment Pack.
    

2. Extract the downloaded package using the following command:

         tar -zxvf apache-zookeeper-3.9.5-bin.tar.gz

3. A new Zookeeper installation directory (zookeeper-3.9.5) is created. This directory will be used as the active zookeeper version.

4. Link the latest version as the current version using the following command:

   ln-s Zookeeper-3.9.5 current

5. Create a Data Directory folder using the following command:

   mkdir dataDir

6. By default, the configuration file is named zoo_sample.conf. Rename the file to zoo.conf. 
7. Edit the zoo.conf file located in $APIN_HOME/zookeeper/zookeeper-3.9.5/conf/ and update the configuration properties.
8. Click here to view Zookeeper configuration settings:

   Add or verify the following properties

   # The number of milliseconds of each tick
   tickTime=2000
   # The number of ticks that the initial
   # synchronization phase can take
   initLimit=10
   # The number of ticks that can pass between
   # sending a request and getting an acknowledgement
   syncLimit=5
   # the directory where the snapshot is stored.
   # do not use /tmp for storage, /tmp here is just
   # example sakes.
   dataDir=../dataDir
   # the port at which the clients will connect
   clientPort=2181
   # the maximum number of client connections.
   # increase this if you need to handle more clients
   #maxClientCnxns=60
   #
   # Be sure to read the maintenance section of the
   # administrator guide before turning on autopurge.
   #
   # http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
   #
   # The number of snapshots to retain in dataDir
   autopurge.snapRetainCount=7
   # Purge task interval in hours
   # Set to "0" to disable auto purge feature
   autopurge.purgeInterval=7
   
   ## Metrics Providers
   #
   # https://prometheus.io Metrics Exporter
   #metricsProvider.className=org.apache.zookeeper.metrics.prometheus.PrometheusMetricsProvider
   #metricsProvider.httpPort=7000
   #metricsProvider.exportJvmInfo=true
   
   admin.serverPort=8181
   admin.enableServer=false
   
   4lw.commands.whitelist=mntr,conf,ruok
   
   ~
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   ~
   ~
   ~
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   "zoo.cfg" 41L, 1229B              

Make sure admin.enableServer=false in configuration