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Last pushed: a year ago
Short Description
A Zookeeper 3.5 image with options for creating clusters using docker-compose.
Full Description

Introduction

This is a Zookeeper image based on the 3.5 branch (currently in alpha) that allows you to automatically configure the myid and zoo.cfg files to create standalone nodes or clusters.

Installation

Pull the image from docker registry:

docker pull mrhornsby/zookeeper:latest

Alternatively you can build the image locally:

git clone https://github.com/mrhornsby/zookeeper.git
cd zookeeper
docker build --tag="<your_tag_here>"

Quick start

To start a single standalone zookeeper node run the following:

docker run --volume=/var/opt/zookeeper -p 2181:2181 mrhornsby/zookeeper:latest

(Note: This will create a new data volume, suitable for a test, but you probably want to mount a host directory or a named volume)

To start a cluster of three zookeeper nodes in an ensemble use the included docker-compose.yml:

docker-compose up

(Note: This will create 3 containers, zk-1, zk-2 and zk-3, each with a dedicated named volume to store their zookeeper data and a user bridge network, name zk, enabling the zookeeper nodes to refer to each other by hostname)

Configuration

The image only has a small set of configuration parameters.

With no arguments the image creates a single zookeeper node with myid set to 1.

With a single argument the image creates a single zookeeper node with myid set to the first argument.

With more than one argument the script creates a single zookeeper node with myid set to the first argument and zoo.conf configured to have each of the other nodes listed e.g.

docker run --volume=/var/opt/zookeeper -p 2181:2181 mrhornsby/zookeeper:latest 1 3 4 7

would result in this server, zk-1, having a config pointing to servers named zk-3, zk-4, zk-7.

The name of the nodes can be varied by modifying the PREFIX environment variable, which defaults to zk-.

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mrhornsby
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