Table of Contents

• Zookeeper
  • Usage
    • Resources
      • zookeeper
      • zookeeper_config
  • Errata
  • Author and License

Zookeeper

Zookeeper is a coordination and discovery service maintained by the Apache Software Foundation.

This cookbook focuses on deploying Zookeeper via Chef.

Usage

This cookbook is primarily a library cookbook. It implements a zookeeper resource to handle the installation and configuration of Zookeeper. It ships with a default recipe for backwards compatibility pre-LWRP which will work fine, but is really just an example.

For local development, you can either use Vagrant, in which case you will need the vagrant-omnibus Vagrant plugin:

vagrant plugin install vagrant-omnibus

Or, you can use Test-Kitchen, which will handle the bootstrapping for you, and is the preferred method for testing this cookbook (usually via a wrapper cookbook).

Recipes

• zookeeper::default : Installs and configures zookeeper. This does not start or manage the service.
• zookeeper::install : Installs the zookeeper but does not configure it.
• zookeeper::config_render : Configures zookeeper but does not install it.
• zookeeper::service : Starts and manages the zookeeper service. Requires zookeeper to be installed/configured.

Resources

This cookbook ships with one resource, with future plans for two more covering service management and configuration rendering.

zookeeper

The zookeeper resource is responsible for installing and (eventually) uninstalling Zookeeper from a node.

Actions: :install, :uninstall

Parameters:

• version: Version of Zookeeper to install (name attribute)
• user: The user who will eventually run Zookeeper (default: 'zookeeper')
• mirror: The mirror to obtain Zookeeper from (required)
• checksum: Checksum for the Zookeeper download file
• install_dir: Which directory to install Zookeeper to (default: `'/opt/zookeeper')

Example:

zookeeper '3.4.7' do
  user     'zookeeper'
  mirror   'http://www.poolsaboveground.com/apache/zookeeper'
  checksum '2e043e04c4da82fbdb38a68e585f3317535b3842c726e0993312948afcc83870'
  action   :install
end

zookeeper_config

This resource renders a Zookeeper configuration file. Period-delimited parameters can be specified either as a flat hash, or by embeddeding each sub-section within a separate hash. See the example below for an example.

Actions: :render, :delete

Parameters:

• user: The user to give ownership of the file to (default: zookeeper)
• config: Hash of configuration parameters to add to the file
• path: Path to write the configuration file to.

Example:

config_hash = {
  clientPort: 2181, 
  dataDir: '/mnt/zk', 
  tickTime: 2000,
  autopurge: {
    snapRetainCount: 1,
    purgeInterval: 1
  }
}

zookeeper_config '/opt/zookeeper/zookeeper-3.4.7/conf/zoo.cfg' do
  config config_hash
  user   'zookeeper'
  action :render
end

zookeeper_node

This resource can create nodes in Zookeeper.

Actions: :create, :create_if_missing, :delete

Parameters:

• path: The zookeeper node path (default: The name of the resource)
• connect_str: The zookeeper connection string (required)
• data: The data to write to the node
• auth_scheme: The authentication scheme (default: digest)
• auth_cert: The authentication password or data
• acl_digest: Hash of acl permissions per 'digest' id
• acl_ip: Hash of acl permissions per 'ip'
• acl_sasl: Hash of acl permissions per 'sasl' id (SASLAuthentication provider must be enabled)
• acl_world: Acl permissions for anyone (default: Zk::PERM_ALL)

Example:

zookeeper_node '/data/myNode' do
  action :create
  connect_str  "localhost:2181"
  data         "my data"
  auth_scheme  "digest"
  auth_cert    "user1:pwd1"
  acl_digest   "user1:a9l5yfb9zl8WCXjVmi5/XOC0Ep4=" => Zk::PERM_ALL
  acl_ip       "127.0.0.1" => Zk::PERM_READ | Zk::PERM_WRITE
  acl_sasl     "user@CHEF.IO" => Zk::PERM_ADMIN
  acl_world    Zk::PERM_NONE
end

Errata

• Version 1.4.7 on the community site is in fact version 1.4.8.

Author and License

Simple Finance ops@simple.com Apache License, Version 2.0