PM2 Cookbook

Chef coookbook to install and manage PM2.

Requirements

Depends on the cookbooks:

• nodejs

Platforms

• Centos 6+
• Amazon Linux

Attributes

default.rb

<table>
<tr>
<th>Attribute</th>
<th>Type</th>
<th>Description</th>
<th>Options</th>
<th>Default</th>
</tr>
<tr>
<td><tt>['pm2']['version']</tt></td>
<td>String</td>
<td>PM2 node module version to install</td>
<td>-</td>
<td><tt>latest</tt></td>
</tr>
</table>

Up the chain

The nodejs cookbook uses the following attributes to define the nodejs and npm formats to install - override them for the desired behaviour.

<table>
<tr>
<th>Attribute</th>
<th>Description</th>
</tr>
<tr>
<td><tt>['nodejs']['install_method']</tt></td>
<td>Nodejs install method</td>
</tr>
<tr>
<td><tt>['nodejs']['npm]['install_method']</tt></td>
<td>NPM install method</td>
</tr>
</table>

See the nodejs cookbook for details.

Recipes

default.rb

Installs PM2 as a global node module using a specific version if specified in the default attributes described above.

nodejs.rb

Install nodejs and npm using the nodejs cookbook.

Example

To install PM2:

Add the pm2 cookbook as a dependency:

depends 'pm2'

Include the pm2::default recipe:

include_recipe 'pm2::default'

Providers

pm2_application

The pm2_application provider manages a json configuration file for a node application and controls it with PM2.

It only start processes from a json configuration (located in /etc/pm2/conf.d) and it does not support starting processes by calling the PM2 CLI directly.

Actions

The available actions try to represent some of the PM2 CLI control actions.

<table>
<tr>
<th>Action</th>
<th>Description</th>
<th>Notes</th>
</tr>
<tr>
<td><tt>:deploy</tt></td>
<td>Create a json configuration file for a node application</td>
<td>All configuration files are deployed in <tt>/etc/pm2/conf.d</tt></td>
</tr>
<tr>
<td><tt>:start</tt></td>
<td>Start an application defined as a json file</td>
<td>It does not change the state of a running application - use one of the start_or_restart/start_or_reload methods instead</td>
</tr>
<tr>
<td><tt>:stop</tt></td>
<td>Stop an application</td>
<td>Invokes the PM2 CLI to stop an application by name</td>
</tr>
<tr>
<td><tt>:stop</tt></td>
<td>Restart an application</td>
<td>Invokes the PM2 CLI to restart an application by name only if it is running</td>
</tr>
<tr>
<td><tt>:reload</tt></td>
<td>Reload an application</td>
<td>Invokes the PM2 CLI to reload an application by name only if it is running</td>
</tr>
<tr>
<td><tt>:graceful_reload</tt></td>
<td>Gracefully reload an application</td>
<td>Invokes the PM2 CLI to gracefully reload an application by name only if it is running</td>
</tr>
<tr>
<td><tt>:start_or_restart</tt></td>
<td>Start or restart an application</td>
<td>Invokes the PM2 CLI to start or restart an application by name</td>
</tr>
<tr>
<td><tt>:start_or_reload</tt></td>
<td>Start or reload an application</td>
<td>Invokes the PM2 CLI to start or reload an application by name</td>
</tr>
<tr>
<td><tt>:start_or_graceful_reload</tt></td>
<td>Start or gracefully reload an application</td>
<td>Invokes the PM2 CLI to start or gracefully reload an application by name</td>
</tr>
<tr>
<td><tt>:delete</tt></td>
<td>Stop and delete an application json file</td>
<td>Invokes the PM2 CLI to stop an application and deletes the json file from the filesystem</td>
</tr>
<tr>
<td><tt>:startup</tt></td>
<td>Configures PM2 to start on boot</td>
<td>Invokes the PM2 CLI to configure the startup process for the running platform</td>
</tr>
</table>

If no action is specified then the default action [:deploy, :start_or_restart, :startup] will be used.

Attributes

The available attributes try to represent the PM2 json definition options schema.

<table>
<tr>
<th>Attribute</th>
<th>Type</th>
<th>Description</th>
<th>Required</th>
</tr>
<tr>
<td><tt>name</tt></td>
<td>String</td>
<td>Name of the application - See PM2 documentation for reference - Note: this is the resource name attribute</td>
<td>Yes</td>
</tr>
<tr>
<td><tt>script</tt></td>
<td>String</td>
<td>Node script to execute - See PM2 documentation for reference</td>
<td>Yes</td>
</tr>
<tr>
<td><tt>args</tt></td>
<td>Array</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>node_args</tt></td>
<td>Array</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>max_memory_restart</tt></td>
<td>String</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>instances</tt></td>
<td>Integer</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>log_file</tt></td>
<td>String</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>error_file</tt></td>
<td>String</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>out_file</tt></td>
<td>String</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>pid_file</tt></td>
<td>String</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>cron_restart</tt></td>
<td>String</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>cwd</tt></td>
<td>String</td>
<td>Location of the node script to execute - See PM2 documentation for reference</td>
<td>Yes</td>
</tr>
<tr>
<td><tt>merge_logs</tt></td>
<td>TrueClass/FalseClass</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>ignore_watch</tt></td>
<td>Array</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>watch_options</tt></td>
<td>Hash</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>env</tt></td>
<td>Hash</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>log_data_format</tt></td>
<td>String</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>min_uptime</tt></td>
<td>String</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>max_restart</tt></td>
<td>Integer</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>exec_mode</tt></td>
<td>String</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>exec_interpreter</tt></td>
<td>String</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>write</tt></td>
<td>TrueClass/FalseClass</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
<tr>
<td><tt>force</tt></td>
<td>TrueClass/FalseClass</td>
<td>See PM2 documentation for reference</td>
<td>No</td>
</tr>
</table>

Example

To deploy and start (or restart) a test.js application that lives in /tmp/test.js:

Install PM2 as described in the Recipes example above.

Use the pm2_application provider - most basic example:

pm2_application 'test' do
  script 'test.js'
  cwd '/tmp'
  action [:deploy, :start_or_restart]
end

This will deploy a /etc/pm2/conf.d/test.json configuration file and start/restart the application with PM2.

References

• PM2 advanced documentation

Development / Contributing

Dependencies

• Ruby
• Bundler

Installation

$ git clone git@github.com:Mindera/pm2-cookbook.git
$ cd pm2-cookbook
$ bundle install

Tests

To run unit tests (chefspec):
bash
$ bundle exec rake unit


To run lint tests (rubocop, foodcritic):
bash
$ bundle exec rake lint


To run integration tests (kitchen-ci, serverspec):
bash
$ bundle exec rake integration:vagrant