| Purpose | Build Java keystores form existing keys and certificates. |
| Module | puppet/java_ks |
| Puppet Version | 2.7+ |
| Platforms | OpenJDK 6, OpenJDK 7 |
- When building a Java keystore outside of the Java tool chain, you have to go through a process that spans a couple different tools and intermediary formats before you have a valid keystore. The java_ks module attempts to relieve this by giving you one interface: Puppet. Puppet handles the conversion and intermediary formats for you.
- This module contains no manifests, only a composite namevar type and its supporting provider.
- This module allows for keystores to be provisioned along with your Puppet deployed Java application servers.
Installing the module
| Complexity | Easy |
| Installation Time | 10 minutes |
- Make sure Java is installed on your Java application nodes by installing the “puppetlabs/java” module.
root@pm01:~# puppet module install puppetlabs/java Notice: Preparing to install into /etc/puppet/modules ... Notice: Downloading from https://forge.puppetlabs.com ... Notice: Installing -- do not interrupt ... /etc/puppet/modules └─┬ puppetlabs-java (v0.2.0) └── puppetlabs-stdlib (v3.2.0)
- Classify your Java application node (this is probably highly dependent on your organization).
class { 'java': distribution => 'jre' } - Install the java_ks module from the Puppet Forge
root@pm01:~# puppet module install puppetlabs/java_ks Notice: Preparing to install into /etc/puppet/modules ... Notice: Downloading from https://forge.puppetlabs.com ... Notice: Installing -- do not interrupt ... /etc/puppet/modules └── puppetlabs-java_ks (v0.0.6)
- Make sure pluginsync is set to true on your puppet master and agents.
Resource Overview
Java_ks is special in that it uses an uncommonly used feature of Puppet’s resource api, the composite namevar. A composite namevar allows you to construct unique resource definitions from more than one resource parameter. This is employed to overcome the possible need to install the same certificate into multiple keystores from within the same catalog.Example 1: Defining the resource with an arbitrary title.
java_ks { 'accounting_dev_broker':
ensure => latest,
name => 'accounting.dev.example.com',
certificate => '/etc/ssl/certs/accounting.dev.example.com.crt',
private_key => '/etc/ssl/private/accounting.dev.example.com.key',
target => '/etc/activemq/broker.jks',
password => 'not_so_secret',
}Example 2: Defining a resource where title maps to name AND target parameters. You’ll notice that “:” is between the fqdn of the cert, which I am using as the name of this resource and the path to the broker.ks file. The “:” is the namevar separator I chose for this type.
java_ks { 'accounting.dev.example.com:/etc/activemq/broker.jks':
ensure => latest,
certificate => '/etc/ssl/certs/accounting.dev.example.com.crt',
private_key => '/etc/ssl/private/accounting.dev.example.com.key',
password => 'not_so_secret',
}Example 3: Build two keystores, one for our activemq broker and another for a Java web application.
java_ks { 'accounting_dev_broker':
ensure => latest,
name => 'accounting.dev.example.com',
certificate => '/etc/ssl/certs/accounting.dev.example.com.crt',
private_key => '/etc/ssl/private/accounting.dev.example.com.key',
target => '/etc/activemq/broker.jks',
password => 'not_so_secret',
}
java_ks { 'accounting_dev_app':
ensure => latest,
name => 'accounting.dev.example.com',
certificate => '/etc/ssl/certs/accounting.dev.example.com.crt',
private_key => '/etc/ssl/private/accounting.dev.example.com.key',
target => '/etc/tomcat/application.jks',
password => 'not_so_secret',
}
Testing the module
Because this module is 100% Ruby, it ships with a set of rspec unit tests.- Running tests:
- Install your operating system’s Ruby Development package.
gem install puppetlabs_spec_helper
cd /etc/puppet/modules/java_ks
- rspec spec
- If tests fail…
- Please report issues or submit a pull request at “https://github.com/puppetlabs/puppetlabs-java_ks”
Configuring the module
| Complexity | N/A |
| Installation Time | N/A |
Example usage
I illustrated some example usage while we were reviewing the resources earlier. To see this type actually used in the wild, you can take a look at the puppetlabs-operations fork of the puppetlabs-activemq module, which unfortunately isn’t Puppet Forge ready.Conclusion
This type reduced the number of resources I needed to configure my Java keystore from six to two, one to create the store and then a simple file resource to manage permissions. It also helped readability enormously. Anyone that has ever used an exec resource knows that reading inline bash can be eye straining.- Possible improvements
- The unit tests currently stub the return on some commands and methods more frequently than they should. This reduces the validity of the tests when applied to a real world environment.
- Passwords for private keys and keystores are currently set to the same thing. This means you need to either know the password to the private key and use it when you create the keystore or you need to strip the password from the private key.
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