zookeeperd

Puppet module to really automate configuration of a zookeeper cluster.

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Module Stats

8,143 downloads

237 latest version

5.0 quality score

Version information

released Jun 29th 2023

This version is compatible with:

Puppet Enterprise 2023.2.x, 2023.1.x, 2023.0.x, 2021.7.x, 2021.6.x, 2021.5.x, 2021.4.x, 2021.3.x, 2021.2.x, 2021.1.x, 2021.0.x, 2019.8.x, 2019.7.x, 2019.5.x, 2019.4.x, 2019.3.x, 2019.2.x, 2019.1.x, 2019.0.x
Puppet >= 6.0.0 < 8.0.0
,

Start using this module

Installation method

Add this module to your Puppetfile:

mod 'trepasi-zookeeperd', '5.0.0'

Learn more about managing modules with a Puppetfile

Add this module to your Bolt project:

bolt module add trepasi-zookeeperd

Learn more about using this module with an existing project

Manually install this module globally with Puppet module tool:

puppet module install trepasi-zookeeperd --version 5.0.0

Documentation

trepasi/zookeeperd — version 5.0.0 Jun 29th 2023

zookeeperd

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zookeeperd
```
- [Table of Contents](#table-of-contents)
```

Description

Yet another puppet module configuring zookeeper ...

Unique with this module are two features making the usually very painful zookeeper configuration as easy as it can be. First, as all zookeeper nodes need a unique ID to be given, this module provides a custom fact which calculatint a suitable value. Second, all zookeeper nodes need to get the list of all nodes belonging to its ensamble. By making use of puppet's exported resource feature, node definitions are exported and collected to building the server list. Utilizing both features will automate zookeeper configuration and eliminate the node ID and the list of servers from your puppet manifests and hiera.

Setup

Setup Requirements

It is presumed that zookeeper packages are available on your system via regular package management. This module won't configure any package management repositories.

Pluginsync needs to be enabled on your puppet deployment in order to get the custom fact working.

Stored config needs to be enabled on your puppetmaster infrastructure in order to get autoconfiguration feature working. Also, it is strongly recommended to use PuppetDB and consider it as a critical part of your configuration management system. Be aware, that manipulation, inconsistency and data loss from your PuppetDB may cause this module to disrupt your zookeeper clusters.

Beginning with zookeeperd

Install the module and its dependencies to your environment. Include the module to your manifests. You may utilize hiera to hold configuration parameter. The module carries most of its default values using hiera in module, which also serve as an example.

Usage

Automatic cluster configuration

This module enables to automatically create the configurations of zookeeper instances belonging to the same ensamble. To do so, enable autoconfiguration and set an ensamble name on all nodes of the cluster.

class{ zookeeperd:
  ensamble          => 'Awesamly easy way to your zookeeper cluster',
  enable_autoconfig => true,
}

This will install zookeeper to all nodes this manifest applies to and configure all instances having the same ensamble name to one cluster. Note, that puppet needs at least two runs to get the configuration ready: the first run will export the node definitions, the second will collect all nodes. This is done by exporting zookeeperd::node resources tagged with their ensamble and collecting the same resources having the matching ensamble tag. Each zookeeperd::node resource will create one server entry in the zoo.cfg configuration telling zookeeper the list of nodes within the cluster.

Manual configuration

If you don't trust your PuppetDB, or does not want stored configs on your PupppetMaster, you may add pass the list of nodes to the module through nodes parameter.

class{ zookeeperd:
  myid  => $id_of_this_node,
  nodes => {
    'first' => {
      nodeid => 1,
      nodename => 'first.zk.example.org',
    },
    'second' => {
      nodeid => 2,
      nodename => 'first.zk.example.org',
    }
  }
}

Zookeeper maintenance

As zookeeper needs maintenance to cleanup logs and snapshots this module provides a systemd service unit invoking the cleanup and a timer unit scheduling it. You may or may not like zookeepers internal maintenance scheduler, which you can configure via zookeeperd::config.

By default, this module will create a systemd service unit called zookeeper-cleanup.service which does the maintenance and a timer unit zookeeper-cleanup.timer triggering a previous on a schedule.

Using zookeeperd fact

The module provides a custom fact which calculates a unique ID for all nodes. This fact is available $facts['zookeeperd']['myid']. The myid parameter of the module defaults to this value. The value is calculated from the IP address ($facts['networking']['ip]) of the node by converting it to a 32 bit integer.

Zookeeper documentation, however, states myid must between 1..255, the software itself is treating this as unsigned long, and it is not used for any logic nor arithmetic.

Configuration

zoo.cfg

The main configuration file of zookeeper, the zoo.cfg is created by taking key-value pairs from zookeeperd::config hash. The module proves default values with the minimum parameters needed for zookeeper.

Reference

The module code is documented using puppet-strings. Visit https://rtib.github.io/puppet-zookeeperd/ to access detailed code documentation.

Limitations

This is where you list OS compatibility, version compatibility, etc. If there are Known Issues, you might want to include them under their own heading here.

Development

Puppet modules on the Puppet Forge are open projects, and community contributions are essential for keeping them great. Please follow the usual guidelines when contributing changes.

fork the repository on GitHub
make your improvements, preferably to a feature branch
rebase your changes to the head of the master branch
squash your changes into a single commit
file a pull request and check the result of Travis-CI tests

Reference

Classes

zookeeperd: Main class of puppet module configuring nodes of an zookeeper ensamble.
zookeeperd::config: control the configuration of the node
zookeeperd::install: control the configuration of the node
zookeeperd::service: control the configuration of the node

Defined types

zookeeperd::node: A short summary of the purpose of this defined type.

Classes

`zookeeperd`

zookeeperd

Puppet module to configure the nodes of an zookeeper ensamble.

Examples

include zookeeperd

zookeeperd::ensamble: 'Awesamly important, dynamically growing zookeeper cluster'
zookeeperd::enable_autoconfig: true

Parameters

The following parameters are available in the zookeeperd class:

ensure
manage_packages
package_names
data_dir
user
group
cfg_path
config
maintenance_service
maintenance_schedule
maintenance_snapretention
manage_service
service_name
service_enabled
service_running
ensamble
nodes
myid
nodename

`nodename`

Data type: String

fqdn of this node

Default value: $facts['networking']['fqdn']

`zookeeperd::config`

zookeeperd::config

Internal class do not use of its own.

`zookeeperd::install`

zookeeperd::install

Internal class do not use of its own.

`zookeeperd::service`

zookeeperd::service

Internal class do not use of its own.

Defined types

`zookeeperd::node`

zookeeperd::node

A node definition to be added as server line in zoo.cfg file. One may define the nodes of an zookeeper ensamble by instanciating this resource. The module itself is implementing a factory to create nodes to all keys added to zookeeperd::nodes hash. This resource is also used with autoconfiguration, which exports this resource and collect all exported nodes of the same ensamble.

Examples

zookeeperd::node { 'first node of this cluster':
  nodeid   => 1,
  nodename => 'first.zk.example.org',
}
zookeeperd::node { 'second node of this cluster':
  nodeid   => 2,
  nodename => 'second.zk.example.org',
}

Parameters

The following parameters are available in the zookeeperd::node defined type:

nodeid
nodename
ensure
cfgtgt
ensamble
leaderport
electionport

`nodeid`

Data type: Integer

node id (myid) of the zookeeper node to be added to this configuration

`nodename`

Data type: String

fqdn or IP address of the node to be added

`ensure`

Data type: Enum['present', 'absent']

ensure meta-parameter to add or remove this node

Default value: 'present'

`cfgtgt`

Data type: String

path to the configuration file to which this server should be added

Default value: $zookeeperd::cfg_path

`ensamble`

Data type: Optional[String]

name of the ensamble this node belongs to (used with autoconfig)

Default value: undef

`leaderport`

Data type: Integer

leader port parameter of the server

Default value: 2888

`electionport`

Data type: Integer

port used for leader election

Default value: 3888


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Getting Started

zookeeperd

Version information

This version is compatible with:

Start using this module

Documentation

zookeeperd

Table of Contents

Description

Setup

Setup Requirements

Beginning with zookeeperd

Usage

Automatic cluster configuration

Manual configuration

Zookeeper maintenance

Using zookeeperd fact

Configuration

zoo.cfg

Reference

Limitations

Development

Reference

Table of Contents

Classes

Defined types

Classes

zookeeperd

Examples

Parameters

ensure

manage_packages

package_names

data_dir

user

group

cfg_path

config

maintenance_service

maintenance_schedule

maintenance_snapretention

manage_service

service_name

service_enabled

service_running

ensamble

nodes

myid

nodename

zookeeperd::config

zookeeperd::install

zookeeperd::service

Defined types

zookeeperd::node

Examples

Parameters

nodeid

nodename

ensure

cfgtgt

ensamble

leaderport

electionport

Changelog

v5.0.0 - 2023-06-29

Changed

v4.0.0 - 2021-05-20

Changed

v3.0.0 - 2019-02-13

Added

Changed

v2.2.1 - 2017-10-04

`zookeeperd`

`ensure`

`manage_packages`

`package_names`

`data_dir`

`user`

`group`

`cfg_path`

`config`

`maintenance_service`

`maintenance_schedule`

`maintenance_snapretention`

`manage_service`

`service_name`

`service_enabled`

`service_running`

`ensamble`

`nodes`

`myid`

`nodename`

`zookeeperd::config`

`zookeeperd::install`

`zookeeperd::service`

`zookeeperd::node`

`nodeid`

`nodename`

`ensure`

`cfgtgt`

`ensamble`

`leaderport`

`electionport`