nrpe cookbook

Chef cookbook to install Nagios NRPE client (was previously part of the Nagios cookbook)

Requirements

Chef

Chef 11+

Platform

Debian 7+
FreeBSD 9+
Ubuntu 12.04+
Red Hat Enterprise Linux (CentOS/Amazon/Scientific/Oracle) 5+
Fedora
SUSE / openSUSE 13+

Notes: This cookbook has been tested on the listed platforms. It may work on other platforms with or without modification.

Cookbooks

build-essential
yum-epel (note: this requires yum cookbook v3.0, which breaks compatibility with many other cookbooks)

Recipes

default

Installs the NRPE client via packages or source depending on platform and attributes set

configure

Configures the NRPE client. This will be called internally by the default recipe but can also be used to re-configure later on.

Attributes

platform specific attributes (auto set based on platform)

node['nrpe']['install_method'] - whether to install from package or source. Default chosen by platform based on known packages available for NRPE: debian/ubuntu 'package', Redhat/CentOS/Fedora/Scientific: source
node['nrpe']['home'] - home directory of NRPE
node['nrpe']['conf_dir'] - location of the nrpe configuration
node['nrpe']['ssl_lib_dir'] - ssl directory used by NRPE
node['nrpe']['pid_file'] - location to store the NRPE pid file
node['nrpe']['conf_dir'] - location of the nrpe configuration, default /etc/nagios
node['nrpe']['packages'] - nrpe / plugin packages to install. The default attribute for RHEL/Fedora platforms contains a bare minimum set of packages. The full list of available packages is available at: http://dl.fedoraproject.org/pub/epel/6/x86_64/repoview/letter_n.group.html
node['nrpe']['log_facility'] - log facility for nrpe configuration, default nil (not set)
node['nrpe']['plugin_dir'] - location where Monitoring plugins (aka Nagios plugins) go, default '/usr/lib/nagios/plugins'.

options for package install

node['nrpe']['package']['options'] - options when installing nrpe via package manager. The default value for this attribute is nil.`
node['nrpe']['install_yum-epel'] - whether to install the EPEL repo or not. The default value is true. Set this to false if you do not wish to install the EPEL RPM; in this scenario you will need to make the relevant NRPE packages available via another method e.g. local repo.

nrpe.conf attributes

node['nrpe']['server_port'] - the port nrpe will listen on, default 5666
node['nrpe']['server_address'] - the IP the nrpe server will listen on. This allows you to bind to particular IPs in situations where the system has more than one IP. This is particularly handy in determining if nrpe should bind to the internal or public IP in a cloud environment. Set the attribute to the node attribute for the cloud interface you wish to use. Defaults to nil (not enabled)
node['nrpe']['log_facility'] - syslog facility to log to, default nil (not set)
node['nrpe']['command_prefix'] - command to prefix to every nrpe command (like perhaps sudo), default nil (not set)
node['nrpe']['debug'] - debug level nrpe configuration, default 0
node['nrpe']['connection_timeout'] - connection timeout for nrpe configuration, default nil (not set)
node['nrpe']['dont_blame_nrpe'] - allows the server to send additional values to NRPE via arguments. this needs to be enabled for most checks to function
node['nrpe']['command_timeout'] - the amount of time NRPE will wait for a command to execute before timing out
node['nrpe']['allow_bash_command_substitution'] - allows bash command substitution in your nrpe commands - defaults to nil

urls for source installations

node['nrpe']['url'] - url to retrieve NRPE source
node['nrpe']['version'] - version of NRPE source to download
node['nrpe']['checksum'] - checksum of the NRPE source tarball
node['nrpe']['plugins']['url'] - url to retrieve the plugins source from
node['nrpe']['plugins']['version'] - version of the plugins source to download
node['nrpe']['plugins']['checksum'] - checksum of the plugins source tarball

authorization and server discovery

node['nrpe']['server_role'] - the role that the Nagios server will have in its run list that the clients can search for.
node['nrpe']['allowed_hosts'] - additional hosts that are allowed to connect to this client. Must be an array of strings (i.e. %w(test.host other.host)). These hosts are added in addition to 127.0.0.1 and IPs that are found via search.
node['nrpe']['using_solo_search'] - discover server information in node data_bags even with chef solo through the use of solo-search (https://github.com/edelight/chef-solo-search)
node['nrpe']['multi_environment_monitoring'] - search for nagios servers in all environments not just that of the node when building the array of allowed hosts, default 'false'

user and group attributes

node['nrpe']['user'] - NRPE user, default 'nagios'.
node['nrpe']['group'] - NRPE group, default 'nagios'.

Resources/Providers

check

The check LWRP provides an easy way to add and remove NRPE checks from within cookbooks.

Actions

:add creates a NRPE configuration file and reloads the NRPE process. Default action.
:remove removes the configuration file and reloads the NRPE process

Attribute Parameters

command_name The name of the check. This is the command that you will call from your nagios_service data bag check
warning_condition String that you will pass to the command with the -w flag
critical_condition String that you will pass to the command with the -c flag
command The actual command to execute (including the path). If this is not specified, this will use #{node['nrpe']['plugin_dir']}/command_name as the path to the command.
parameters Any additional parameters you wish to pass to the plugin.
template Use the specific erb template to render NRPE config command.

Examples

# Use LWRP to define check_load
nrpe_check "check_load" do
  command "#{node['nrpe']['plugin_dir']}/check_load"
  warning_condition '10'
  critical_condition '15'
  action :add
end

# Remove the check_load definition
nrpe_check "check_load" do
  action :remove
end

Using template:

nrpe_check "check_load" do
  template "check_load.cfg.erb"
  action :add
end

License & Authors

Author:: Joshua Sierles joshua@37signals.com
Author:: Nathan Haneysmith nathan@chef.io
Author:: Joshua Timberman joshua@chef.io
Author:: Seth Chisamore schisamo@chef.iom
Author:: Tim Smith tsmith@chef.io

Copyright 2009, 37signals
Copyright 2009-2015, Chef Software, Inc.
Copyright 2012, Webtrends Inc.
Copyright 2013-2014, Limelight Networks, Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Dependent cookbooks

build-essential >= 0.0.0

yum-epel >= 0.0.0

Contingent cookbooks

CHANGELOG for nrpe

This file is used to list changes made in each version of nrpe

1.6.2 (2016-08-12)

Fixing service reload/restart issue
Fixing the use_inline_resources error on chef 12 client

1.6.0 (2016-07-21)

Added support for openSUSE via source install
Added chef_version to the metadata
Updated the monitoring plugins to 2.1.2 for source installs
Fixed user/group creation in the source recipe, which would fail chef runs
Fixed source installs for systemd based distros by properly managing the unit file
Resolved a scenario where the NRPE compilation could fail and never run again
Ensured we run the NRPE process using our attribute defined user/group in the source recipe
Ensured NRPE is compiled into /usr/sbin not /usr/bin so init / systemd files work
Require Chef 11. Chef 10 is end of life moving to Chef 11 allows us to remove Ruby 1.8.7 backwards compatibility
Removed support for Fedora < 17
Enabled caching the Chefspecs to speedup runs 3.5X
Removed make from source installs as build-essential already handles this
Added a Rakefile for simplified testing
Disabled FC003 with a .foodcritic file
Removed the Vagrantfile as we already have a Kitchen file
Switched from Rubocop to Cookstyle and resolve all warnings
Added yum to the Berksfile for integration testing
Removed chef-solo-search from the Berksfile as we don't need this for testing -

1.5.4

Documentation fix for pid_file attribute
Make sure that systemd unit file matches the nrpe user attribute

1.5.3

Add template support for config files
Remove node.set in default recipe (Issue #27)

1.5.2

Fedora 20+ / RHEL 7+ systems now run the daemon as nrpe/nrpe since the user installed by the package changed
Fedora 20+ / RHEL 7+ systems now restart on check updates since the systemd scipt doesn't include a reload action
Removed the retry count for starting the NRPE service, which didn't fix the real issue on RHEL 7+

1.5.0

Added 3 retries with a delay of 3 to the nrpe service start for RHEL/CentOS 7
Added ability to define node['nrpe']['packages'] as a Hash to add version information as sample below. In your environment specific cookbook, this version infomation for each individual package can be overriden for required versions (instead of latest one). If it is nil it will install latest one from repositories.

Sample: default['nrpe']['packages'] = { 'nagios-nrpe-server' => {'version' => nil}, 'nagios-plugins' => {'version' => nil}, 'nagios-plugins-basic' => {'version' => nil}, 'nagios-plugins-standard' => {'version' => nil} }

For backward compatibiility, it will also install packages if it is defined as an array in your env specific cookbook.

1.4.12

Added default['nrpe']['checks'] to store all checks as a node attribute
Removed Ruby 1.9.3 and added Ruby 2.2.0 to Travis
Make the yum-epel recipe optional with default['nrpe']['install_yum-epel']

1.4.10

Add support for CentOS / RHEL
Update the LWRP to use the default action functionality introduced in Chef 0.10.10

1.4.8

Rubocop fixes
Remove .DS_Store files in the supermarket file that caused failures on older versions of Berkshelf
Remove strainer gem from Gemfile

1.4.6

Update specs to Chefspec 4.1
Add additional platforms to the Vagrantfile
Fix a compile error / logic error when running on Fedora

1.4.4

Add a chefignore file so that Berkshelf wont fail on dsstore files

1.4.2

NRPE running on a Nagios server would not enable polling from other Nagios servers

1.4.0

Update from nagios-plugins to monitoring-plugins in source installs since the project name changed
Update nagios-plugins 1.5 to 2.0 for source installs
Reorder the attributes so that FreeBSD has log_facility properly set
Add additional specs and update specs to the latest Debian / FreeBSD releases
Update Berkshelf to 3.1.X and update the Berksfile to the new format

1.3.0

Source lsb init-functions in the init script on Ubuntu source installs so the service doesn't start every run
Added new attribute node['nrpe']['allow_bash_command_substitution'] to allow using the allow_bash_command_substitution config option
When searching the the monitoring role search for roles vs. role so the monitoring role can be nested on the run_list
Sort and Unique the array of allowed monitor hosts. This prevents NRPE from restarting on every run when the results come back in a different order
Fix deprecated warning when running specs

1.2.0

Add status / reload commands to the init script for source installs resolving issues with the service on source installs
Add new node['nrpe']['package']['options'] attribute for adding install options to the package install
Add Ubuntu 14.04 to the Test Kitchen config and remove Ubuntu 13.04
Add source install suite to Test Kitchen

1.1.2

Include an example base monitoring recipe with base NRPE checks defined
Fix the LWRP example in the Readme to reflect the current state of the cookbook

1.1.0

Added a server_address attribute to allow binding NRPE to the IP of a specific interface
Added a server_port attribute to allow changing the NRPE port
Added a command_prefix attribute to allow prefixing all commands with another command such as sudo
Minor fixes to the readme

1.0.6

Reload NRPE instead of restarting it when a new check is added
Fix log_facility in the NRPE config to write out on its own line vs clobbering the config

1.0.4

Expanded the chefspecs to multiple platforms and install methods
Fixed a bug where the plugin dir wasn't defined for RHEL platforms causing source install failures

1.0.2

Add chefspecs
Fix test kitchen setup on FreeBSD
Lint fixes with Rubocop
Nagios plugin_dir for Debian/Ubuntu was incorrect. Should always be /usr/lib/nagios/plugins regardless of CPU arch
Update readme to remove several references to the old Nagios cookbook

1.0.0:

Initial release of the cookbook with client functionality split from the existing nagios cookbook

Collaborator Number Metric

1.6.2 passed this metric

Foodcritic Metric

1.6.2 failed this metric

FC003: Check whether you are running with chef server before using server-specific features: /tmp/b8b2317729542d334b97db9c/nrpe/recipes/configure.rb:32
FC003: Check whether you are running with chef server before using server-specific features: /tmp/b8b2317729542d334b97db9c/nrpe/recipes/configure.rb:36

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