2017-07-28 15:36:18 +02:00
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File: README
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— Documentation by YARD 0.9.9
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<div id="content"><div id='filecontents'>
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<p>|Repo Name| version | Build
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Status|
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2017-07-30 13:32:22 +02:00
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|<code>cd_nrpe</code>| 0.0.0.2 | <a
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2017-07-28 15:36:18 +02:00
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href="https://jenkins.confdroid.com/buildStatus/icon?job=cd_nrpe">{Build
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Status</a>/]|</p>
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<h3 id="label-Synopsis">Synopsis</h3>
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<p>NRPE allows monitoring tools like NAGIOS or ICINGA to connect to clients
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for monitoring purposes.</p>
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<p><code>cd_nrpe</code> is a fully parameterized Puppet module to automate
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NRPE installation and configuration.</p>
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<h3 id="label-WARNING">WARNING</h3>
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<p><code>**__!!! Attention: Never use this puppet module on systems which have
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been previously configured manually. It is impossible to predict how and
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what would have been configured, hence previuos configurations outside the
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scope of this module may be overwritten! Automated configurations require a
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test environment to verify that the module suits the purpose intended by
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the user, as well as tune the parameters, before deploying into live
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production!!! __**</code></p>
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<h3 id="label-Table+of+Contents">Table of Contents</h3>
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<ul><li>
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<p><a href="#features">Features</a></p>
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</li><li>
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<p><a
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href="https://gitlab.puppetsoft.com/12WW1160/cd_nrpe/blob/master/REPOSTRUCTURE.md">Repo
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Structure</a></p>
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</li><li>
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<p><a href="#dependencies">Dependencies</a></p>
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</li><li>
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<p><a href="#deployment">Deployment</a></p>
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</li><li>
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<p><a href="#native-puppet-deployment">native Puppet deployment</a></p>
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</li><li>
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<p><a href="#through-foreman">through Foreman</a></p>
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</li><li>
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<p><a href="#parameters">Parameters</a></p>
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</li><li>
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2017-07-30 13:32:22 +02:00
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<p><a href="#managing-check-commands">Managing Check Commands</a></p>
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</li><li>
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2017-07-28 15:36:18 +02:00
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<p><a href="#selinux">SELINUX</a></p>
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</li><li>
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<p><a href="#known-problems">Known Problems</a></p>
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</li><li>
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<p><a href="#support">Support</a></p>
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</li><li>
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<p><a href="#tests">Tests</a></p>
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</li><li>
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<p><a
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href="https://gitlab.puppetsoft.com/12WW1160/cd_nrpe/blob/master/CHANGELOG.md">Changelog</a></p>
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</li><li>
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<p><a href="https://confdroid.com/contact/">Contact Us</a></p>
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</li><li>
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<p><a href="#disclaimer">Disclaimer</a></p>
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</li></ul>
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<h3 id="label-Features">Features</h3>
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<p>INSTALLATION
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* install nrpe binaries</p>
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<p>CONFIGURATION
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* manage NRPE service user properties
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* manage directory
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structure (file system permissions, selinux context) through parameters
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*
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manage configuration files through parameters:
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* nrpe.conf
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* nrpe.cfg
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*
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manage sudo role for nagios user on NRPE clients
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* manage dynamic NRPE
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check command definitions
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* manage iptables (optional)
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* manage selinux
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rule exceptions (optional)</p>
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2017-07-28 18:54:36 +02:00
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<p>SERVICE
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* manage NRPE service</p>
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<h3 id="label-Repo+Structure">Repo Structure</h3>
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<p>Repostructure has moved to REPOSTRUCTURE.md in repo.</p>
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<h3 id="label-Dependencies">Dependencies</h3>
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<p>All dependencies must be included in the catalogue.</p>
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<ul><li>
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<p><a
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href="https://gitlab.puppetsoft.com/12WW1160/cd_resources">cd_resources</a>
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to manage YUM repositories.</p>
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</li><li>
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<p><a
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href="https://gitlab.puppetsoft.com/12WW1160/cd_firewall">cd_firewall</a>
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or <a href="https://github.com/puppetlabs/puppetlabs-firewall">puppetlabs
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firewall</a> to manage iptables</p>
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</li><li>
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<p><a href="https://gitlab.puppetsoft.com/12WW1160/cd_stdlib">cd_stdlib</a> or
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<a href="https://github.com/puppetlabs/puppetlabs-stdlib">puppetlabs
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stdlib</a> to facilitate concat</p>
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</li><li>
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<p><a href="https://gitlab.puppetsoft.com/12WW1160/cd_stdlib">cd_concat</a> or
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<a href="https://github.com/puppetlabs/puppetlabs-concat">puppetlabs
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concat</a> for concatenating files</p>
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</li></ul>
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<h3 id="label-Deployment">Deployment</h3>
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2017-07-28 17:58:08 +02:00
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<p><code>cd_nrpe</code> does typically not need to be specifically declared.
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It will be auto-required by <code>cd_nagios</code> with default settings.
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Only if you want to override settings declare it specifically.</p>
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2017-07-28 15:36:18 +02:00
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<h5 id="label-native+Puppet+deployment">native Puppet deployment</h5>
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<p>via site.pp or nodes.pp</p>
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<pre class="code ruby"><code class="ruby">node 'example.example.net' {
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include cd_puppetdb
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}</code></pre>
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<h4 id="label-through+Foreman%3A">through Foreman:</h4>
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<p>In order to apply parameters through Foreman,
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<strong>cd_nrpe::params</strong> must be added to the host or hostgroup in
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question, unless the defaults are fully acceptable across the estate.</p>
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<p>See <a
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href="https://confdroid.com/2017/05/deploying-our-puppet-modules/">more
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details about class deployment on Confdroid.com</a>.</p>
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<h3 id="label-Parameters">Parameters</h3>
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<p>The following parameters are editable via params.pp or through ENC
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(<strong>recommended</strong>). Values changed will take immediate effect
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at next puppet run. Services will be restarted where neccessary. If you
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want to override parameters, the <a href="#through-foreman">module must be
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specifically declared to hosts when using ENC</a>.</p>
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2017-07-30 13:32:22 +02:00
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<h3 id="label-Mandatory+Parameters">Mandatory Parameters</h3>
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<p>There are currently no mandatory parameters, i.e. the module will function
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right out of box as is.</p>
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<h3 id="label-Optional+Parameters">Optional Parameters</h3>
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<ul><li>
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<p><code>$ne_manage_cmds</code> : Whether to manage check command definitions
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dynamically through a define, i.e. from other Puppet modules or profiles.
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Defaults to <code>true</code>.</p>
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</li><li>
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<p><code>$ne_incl_fw</code> : Whether to manage relevant firewall rules
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through this modules. Defaults to <code>true</code>.</p>
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</li><li>
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<p><code>$ne_include_selinux</code> : Whether to manage selinux exception
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rules. Defaults to <code>true</code>.</p>
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</li><li>
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<p><code>$ne_enable_ssl</code> : Whether to allow SSL settings. See <a
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href="#konwn-problems">known problems</a> for more details.</p>
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2017-07-30 18:58:35 +02:00
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</li><li>
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<p><code>$ne_allow_sudo : Whether to allow the nagios / nrpe user to
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use sudo by default. Controls both the
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setting</code>command_prefix<code>and application of a sudo rule. Defaults
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to</code>false` as it usually is not required for most of the checks.</p>
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</li></ul>
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<h3 id="label-Managing+Check+Commands">Managing Check Commands</h3>
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2017-07-30 13:50:48 +02:00
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<p>In order to connect a Nagios monitoring server to clients through NRPE, you
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must define commands and the desired argument strings on the clients. The
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default NRPE installation comes with a few examples of such commands, which
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are also included in this module. However, every environment is very
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different in their requirements and Nagios via Puppet is all about the
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ability to dynamicically set command arguments based on default variables /
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overrides. For that reason no hard-coded commands are included, but instead
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all commands are set via argument strings, where possible.</p>
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2017-07-30 16:03:58 +02:00
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<p>The commands are created within /etc/nrpe.d/command.cfg , every set of
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instructions creates a new line.</p>
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2017-07-30 14:07:49 +02:00
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<p>Defining commands is as simple as
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that:
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<code>
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`cd_nrpe::commands::definitions` {
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'check_users':
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`ne_check_cmd` =>
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'check_users',
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`ne_cmd_argstring` => '-w $ARG1$ -c
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$ARG2$',
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}
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</code>
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It is very recommendable to define such
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commands within Puppet modules controlling services, so any node running
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the particular service will automatically get the required check commands
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defined as well, while nodes not running the service also do not contain
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the command check.</p>
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<h3 id="label-SELINUX">SELINUX</h3>
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<p>All files and directories are configured with correct selinux context. If
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selinux is disabled, these contexts are ignored.</p>
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<h3 id="label-Known+Problems">Known Problems</h3>
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<ul><li>
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<p>SSL/TLS support: Version 3 of NRPE supposedly has support for SSL/ TLs.
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However, at the time of writing this module, this seems to be buggy, as I
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was unable to start the NRPE service as soon as the
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<code>ssl_cert_file</code> line was uncommented in teh configuration file,
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despite having valid certs in the right position on the node. This happened
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when installing manually, not through this Puppet module. For that reason I
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included the <code>$ne_enable_ssl</code> boolean parameter, which is set to
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<code>false</code> by default, hence disabling SSL/TLS options until this
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has been fixed upstream, or a valid workaround has been found. Setting this
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option to <code>true</code> will include all SSL / TLS settings.</p>
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</li></ul>
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2017-07-30 20:06:28 +02:00
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<h3 id="label-Troubleshooting">Troubleshooting</h3>
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<ul><li>
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<p><code>CHECH_NRPE: Unable to read output</code>: Nagios sudo access also
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needs Selinux to allow this. Default settings in this module take care for
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both through <code>$ne_allow_sudo</code> and
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<code>$ne_include_selinux</code>.</p>
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</li><li>
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<p><code>CHECK_NRPE: Receive header underflow - only 0 bytes received (4
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expected): This is down to the new illegal meta characters feature
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via</code>nasty_metachars`.</p>
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</li></ul>
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2017-07-28 15:36:18 +02:00
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<h3 id="label-Support">Support</h3>
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<ul><li>
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<p>OS: CentOS 6, 7</p>
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</li><li>
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<p>Puppet 3.x</p>
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</li></ul>
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<h3 id="label-Tests">Tests</h3>
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<ul><li>
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<p>Puppet Lint</p>
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</li><li>
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<p>excluded tests:</p>
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<ul><li>
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|
<p><code>--no-class_inherits_from_params_class-check</code>:relavant only to
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|
non-supported outdated puppet versions</p>
|
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</li><li>
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<p><code>--no-variable_scope-check</code>: not applicable as we are inheriting
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|
parameters from params class. the lint check does not distinguish between
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|
facts and inherited parameters.</p>
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</li><li>
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|
<p><code>--no-80chars-check</code>: it is not always possible to stay within
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|
|
80 characters, although typically only occurring on the parameter vault
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|
<code>params.pp</code>.</p>
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</li><li>
|
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|
<p><code>--no-arrow_alignment-check</code>: this check leads to actually not
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|
|
having am easily readable arrow alignment, as this checks <code>per
|
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|
|
block</code>, not per class.</p>
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|
</li></ul>
|
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|
</li><li>
|
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|
<p>Puppet Parser</p>
|
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|
</li><li>
|
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|
|
<p>ERB Template Parser</p>
|
|
|
|
|
</li><li>
|
|
|
|
|
<p>Test for unwanted UTF8 files in the Puppet code as this causes problems
|
|
|
|
|
with PuppetDB (see tests/UTF_Files)</p>
|
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|
<h3 id="label-Contact+Us">Contact Us</h3>
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|
<p><a href="https://confdroid.com/contact/">contact Us</a></p>
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|
|
|
|
</li></ul>
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|
<h3 id="label-Disclaimer">Disclaimer</h3>
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|
<p>ConfDroid as entity is entirely independent from Puppet. We provide custom
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|
|
configuration modules, written for specific purposes and specific
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|
environments.
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|
The modules are tested and supported only as documented, and
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|
|
require testing in designated environments (i.e. lab or development
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|
|
environments) for parameter tuning etc. before deploying into production
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|
environments.</p>
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</div></div>
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<div id="footer">
|
2017-07-30 20:06:28 +02:00
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Generated on Sun Jul 30 20:06:24 2017 by
|
2017-07-28 15:36:18 +02:00
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|
<a href="http://yardoc.org" title="Yay! A Ruby Documentation Tool" target="_parent">yard</a>
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0.9.9 (ruby-2.0.0).
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</div>
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</div>
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</body>
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</html>
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