SELinux module for Puppet

Overview
Module Description - What the module does and why it is useful
Usage - Configuration options and additional functionality
Reference - An under-the-hood peek at what the module is doing and how
Defined Types
Development - Guide for contributing to the module
Authors

Overview

This class manages SELinux.

Requirements

Puppet 5 or later

Module Description

This module will configure SELinux and/or deploy SELinux based modules to running system.

Get in touch

IRC: #voxpupuli on irc.freenode.net (Freenode WebChat)
Mailinglist: [email protected] (groups.io Webinterface)

Upgrading from puppet-selinux 0.8.x

Previously, module building always used the refpolicy framework. The default module builder is now 'simple', which uses only checkmodule. Not all features are supported with this builder.

To build modules using the refpolicy framework like previous versions did, specify the 'refpolicy' builder either explicitly per module or globally via the main class
The interfaces to the various helper manifests has been changed to be more in line with Puppet file resource naming conventions.

You will need to update your manifests to use the new parameter names.
The selinux::restorecond manifest to manage the restorecond service no longer exists

Known problems / limitations

The selinux_python_command fact is now deprecated and will be removed in version 4 of the module.
If SELinux is disabled and you want to switch to permissive or enforcing you are required to reboot the system (limitation of SELinux). The module won't do this for you.
If SELinux is disabled and the user wants enforcing mode, the module will downgrade to permissive mode instead to avoid transitioning directly from disabled to enforcing state after a reboot and potentially breaking the system. The user will receive a warning when this happens,
If you add filecontexts with semanage fcontext (what selinux::fcontext does) the order is important. If you add /my/folder before /my/folder/subfolder only /my/folder will match (limitation of SELinux). There is no such limitation to file-contexts defined in SELinux modules. (GH-121)
If you try to remove a built-in permissive type, the operation will appear to succeed but will actually have no effect, making your puppet runs non-idempotent.
The selinux_port provider may misbehave if the title does not correspond to the format it expects. Users should use the selinux::port define instead except when purging resources
Defining port ranges that overlap with existing ranges is currently not detected, and will cause semanage to error when the resource is applied.
On Debian systems, the defined types fcontext, permissive, and port do not work because of PA-2985.

Usage

Generated puppet strings documentation with examples is available in the REFERENCE.md

It's also included in the docs/ folder as simple html pages.

Reference

Basic usage

include selinux

This will include the module and allow you to use the provided defined types, but will not modify existing SELinux settings on the system.

More advanced usage

class { selinux:
  mode => 'enforcing',
  type => 'targeted',
}

This will include the module and manage the SELinux mode (possible values are enforcing, permissive, and disabled) and enforcement type (possible values are targeted, minimum, and mls). Note that disabling SELinux requires a reboot to fully take effect. It will run in permissive mode until then.

Deploy a custom module using the refpolicy framework

selinux::module { 'resnet-puppet':
  ensure    => 'present',
  source_te => 'puppet:///modules/site_puppet/site-puppet.te',
  source_fc => 'puppet:///modules/site_puppet/site-puppet.fc',
  source_if => 'puppet:///modules/site_puppet/site-puppet.if',
  builder   => 'refpolicy'
}

Using pre-compiled policy packages

selinux::module { 'resnet-puppet':
  ensure    => 'present',
  source_pp => 'puppet:///modules/site_puppet/site-puppet.pp',
}

Note that pre-compiled policy packages may not work reliably across all RHEL / CentOS releases. It's up to you as the user to test that your packages load properly.

Set a boolean value

selinux::boolean { 'puppetagent_manage_all_files': }

Defined Types

boolean - Set seboolean values
fcontext - Define fcontext types and equals values
module - Manage an SELinux module
permissive - Set a context to permissive.
port - Set selinux port context policies

Development

Things to remember

The SELinux tools behave odd when SELinux is disabled
- semanage requires --noreload while in disabled mode when adding or changing something
- Only few --list operations work
run acceptance tests: ./test-acceptance-with-vagrant

Facter facts

The fact values might be unexpected while in disabled mode. One could expect the config_mode to be set, but only the boolean enabled is set.

The most important facts:

Fact	Fact (old)	Mode: disabled	Mode: permissive	Mode: enforcing
`$facts['os']['selinux']['enabled']`	`$::selinux`	false	true	true
`$facts['os']['selinux']['config_mode']`	`$::selinux_config_mode`	undef	Value of SELINUX in /etc/selinux/config	Value of SELINUX in /etc/selinux/config
`$facts['os']['selinux']['current_mode']`	`$::selinux_current_mode`	undef	Value of `getenforce` downcased	Value of `getenforce` downcased

Authors

VoxPupuli [email protected]
James Fryman [email protected]

leemachine / puppet-selinux Goto Github PK

puppet-selinux's Introduction