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https://github.com/sensu/sensu-chef

Sensu Chef cookbook.
https://github.com/sensu/sensu-chef

chef-cookbook sensu

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Sensu Chef cookbook.

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README 

        
![sensu](https://raw.github.com/sensu/sensu/master/sensu-logo.png)



[![Build Status](https://img.shields.io/travis/sensu/sensu-chef.svg)](https://travis-ci.org/sensu/sensu-chef)

[![Cookbook Version](https://img.shields.io/cookbook/v/sensu.svg)](https://supermarket.chef.io/cookbooks/sensu)

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## Description



This cookbook provides custom resources and service recipes to install and configure

[Sensu](https://github.com/sensu/sensu/wiki), a monitoring framework.



The custom resources provide building blocks for creating a monitoring

cookbook specific to your environment (wrapper). **Without such a

wrapper, no Sensu configuration files will be created for your nodes.**



An example wrapper cookbook can be found [HERE](https://github.com/portertech/chef-monitor).



[How to Write Reusable Chef Cookbooks](http://bit.ly/10r993N)



## Contributing



See CODE_OF_CONDUCT.md, CONTRIBUTING.md and TESTING.md documents.



## Dependencies



### Platforms



* Ubuntu/Debian

* RHEL and derivatives

* Fedora

* Windows

* AIX



### Chef



* Chef 13.3+ please check the `metadata.rb` file for the latest released version for [example](https://github.com/sensu/sensu-chef/blob/v5.1.2/metadata.rb#L45)



### Cookbooks



* [Windows](https://supermarket.chef.io/cookbooks/windows)

* [RabbitMQ](https://supermarket.chef.io/cookbooks/rabbitmq)

* [RedisIO](https://supermarket.chef.io/cookbooks/redisio)

* [ms_dotnet](https://supermarket.chef.io/cookbooks/ms_dotnet)



**NOTE**: This cookbook either constrains its dependencies optimistically (`>=`) or

 not at all. You're strongly encouraged to more strictly manage these

 dependencies in your wrapper cookbook.



## Package versioning



This cookbook makes no attempt to manage the versions of its package

dependencies. If you desire or require management of these versions, you should

handle these via your wrapper cookbook.



## Prerequisites



### SSL configuration



Running Sensu with SSL is recommended; by default this cookbook attempts to load

SSL credentials from a data bag `sensu`, with an item `ssl`, containing the

required SSL certificates and keys. These data bag items may be encrypted via

native Chef encrypted data bags or via Chef Vault.



The data loaded from the data bag by default is expected to be formatted as

follows:



```json

{

  "server": {

    "cert": "CERTIFICATE_DATA",

    "key": "PRIVATE_KEY_DATA",

    "cacert": "CA_CERTIFICATE_DATA"

  },

  "client": {

    "cert": "CERTIFICATE_DATA",

    "key": "PRIVATE_KEY_DATA"

  }

}

```



All of the above values are expected to be strings comprised of PEM-formatted

credentials with escaped line endings. See

`test/integration/data_bags/sensu/ssl.json` for a more literal example.



If the attempt to load SSL credentials from a data bag fails, the cookbook will

log a warning but proceed with the rest of the Chef run anyway, on the

assumption that credentials will be inserted into the Chef "run state" (i.e.

`node.run_state['sensu']['ssl']`) in the same format using the

`Sensu::ChefRunState` helper methods, `set_sensu_run_state` and

`get_sensu_run_state`.



Please see the [documentation for the run state helper

methods](#helper-modules-and-methods) for more information.



This cookbook comes with a tool to generate the certificates and data bag items.

If the integrity of the certificates is ever compromised, you must regenerate

and redeploy them.



```

cd examples/ssl

./ssl_certs.sh generate

knife data bag create sensu

```



Use the plain-text data bag item:



``` shell

knife data bag from file sensu ssl.json

```



Or, encrypt it with your data bag secret. See [Encrypt a Data Bag](https://docs.getchef.com/essentials_data_bags.html#encrypt-a-data-bag-item)

for more information.



```

knife data bag --secret-file /path/to/your/secret from file sensu ssl.json

```



``` shell

./ssl_certs.sh clean

```



## Recipes



### sensu::default



Installs Sensu and creates a base configuration file, intended to be

extended. This recipe must be included before any of the Sensu LWRP's

can be used. This recipe does not enable or start any services.



### sensu::rabbitmq



Installs and configures RabbitMQ for Sensu, from configuring SSL to

creating a vhost and credentials. This recipe relies heavily on the

community RabbitMQ cookbook LWRP's.



### sensu::redis



Installs and configures Redis for Sensu. This recipe uses the

RedisIO cookbook and installs Redis from source.



### sensu::enterprise



Installs and configures Sensu Enterprise.



### sensu::server_service



Enables and starts the Sensu server.



### sensu::client_service



Enables and starts the Sensu client.



### sensu::api_service



Enables and starts the Sensu API.



### sensu::enterprise_service



Enables and starts Sensu Enterprise.



### sensu::enterprise_dashboard



Installs and configures Sensu Enterprise Dashboard.



### sensu::enterprise_dashboard_service



Enables and starts Sensu Enterprise Dashboard.



## Attributes



### Installation



`node["sensu"]["version"]` - Sensu build to install.



`node["sensu"]["use_unstable_repo"]` - If the build resides on the

"unstable" repository.



`node["sensu"]["apt_repo_codename"]` - Override LSB release codename

detected by ohai for purposes of configuring the apt repository definition.



`node["sensu"]["yum_repo_releasever"]` - Override `$releasever` string

used in yum repository definition.



`node['sensu']['yum_flush_cache']` - Override chefs in memory cache of yum cache during a `chef-client` run. For more information see [here](https://docs.chef.io/resource_yum.html).



`node["sensu"]["directory"]` - Sensu configuration directory.



`node["sensu"]["log_directory"]` - Sensu log directory.



`node["sensu"]["log_level"]` - Sensu log level (eg. "warn").



`node["sensu"]["log_rotate_file_size"]` - Windows only attribute to tell [winsw](https://github.com/kohsuke/winsw) to rotate log file when size reaches this.



`node["sensu"]["log_rotate_file_keep"]` - Windows only attribute to tell [winsw](https://github.com/kohsuke/winsw) to keep x number of log files on disk.



`node["sensu"]["use_ssl"]` - If Sensu and RabbitMQ are to use SSL.



`node["sensu"]["user"]` - The user who owns all sensu files and directories. Default

"sensu".



`node["sensu"]["group"]` - The group that owns all sensu files and directories.

Default "sensu".



`node["sensu"]["use_embedded_ruby"]` - If Sensu Ruby handlers and plugins

use the embedded Ruby in the Sensu package (default: true).



`node["sensu"]["service_max_wait"]` - How long service scripts should wait

for Sensu to start/stop.



`node["sensu"]["loaded_tempfile_dir"]` - Where Sensu stores temporary files. Set a persistent directory if you use hardened system that cleans temporary directory regularly.



### Windows



Sensu requires Microsoft's .Net Framework to run on Windows. The following attributes influence the installation of .Net via this cookbook:



`node["sensu"]["windows"]["install_dotnet"]` - Toggles installation of .Net Framework using ms_dotnet cookbook. (default: true)



`node["sensu"]["windows"]["dotnet_major_version"]` - Major version of .Net Framework to install. (default: 4)



Adjusting the value of `dotnet_major_version` attribute will influence which

 recipe from `ms_dotnet` cookbook will be included. See [`ms_dotnet` cookbook](https://github.com/criteo-cookbooks/ms_dotnet/blob/v2.6.1/README.md)

 for additional details on using this cookbook.



### Transport



`node["sensu"]["transport"]["name"]` - Name of transport to use for Sensu communications. Default "rabbitmq"



### RabbitMQ



`node["sensu"]["rabbitmq"]["hosts"]` - Array of RabbitMQ hosts as strings, which will be combined with other RabbitMQ attributes to generate the Sensu RabbitMQ transport configuration as an array of hashes. Falls back to `node["sensu"]["rabbitmq"]["host"]` when empty. Defaults to an empty array.



`node["sensu"]["rabbitmq"]["host"]` - RabbitMQ host.



`node["sensu"]["rabbitmq"]["port"]` - RabbitMQ port, usually for SSL.



`node["sensu"]["rabbitmq"]["ssl"]` - RabbitMQ SSL configuration, DO NOT EDIT THIS.



`node["sensu"]["rabbitmq"]["vhost"]` - RabbitMQ vhost for Sensu.



`node["sensu"]["rabbitmq"]["user"]` - RabbitMQ user for Sensu.



`node["sensu"]["rabbitmq"]["password"]` - RabbitMQ password for Sensu.



### Redis



`node["sensu"]["redis"]["host"]` - Redis host.



`node["sensu"]["redis"]["port"]` - Redis port.



### Sensu API



`node["sensu"]["api"]["host"]` - Sensu API host, for other services to reach it.



`node["sensu"]["api"]["bind"]` - Sensu API bind address.



`node["sensu"]["api"]["port"]` - Sensu API port.



### Sensu Enterprise



`node["sensu"]["enterprise"]["repo_protocol"]` - Sensu Enterprise repo protocol (e.g. http, https)



`node["sensu"]["enterprise"]["repo_host"]` - Sensu Enterprise repo host



`node["sensu"]["enterprise"]["version"]` - Desired Sensu Enterprise package version



`node["sensu"]["enterprise"]["use_unstable_repo"]` - Toggle use of Sensu Enterprise unstable repository



`node["sensu"]["enterprise"]["log_level"]` - Configure Sensu Enterprise log level



`node["sensu"]["enterprise"]["heap_size"]` - Configure Sensu Enterprise heap size



`node["sensu"]["enterprise"]["heap_dump_path"]` - Configure path where Sensu Enterprise will store heap dumps. Directory path will be managed by Chef. Honored by Enterprise version 2.0.0 and newer.



`node["sensu"]["enterprise"]["java_opts"]` - Specify additional Java options when running Sensu Enterprise



`node["sensu"]["enterprise"]["max_open_files"]` - Specify maxiumum number of file handles. Honored by Enterprise version 1.7.2 and newer.



## Custom Resources (LWRPs)



### Define a client



```ruby

sensu_client node["name"] do

  address node["ipaddress"]

  subscriptions node["roles"] + ["all"]

  additional(:cluster => node["cluster"])

end

```



The `sensu_client` provider also supports the following optional attributes:



* deregister

* deregistration

* keepalive

* keepalives

* redact

* registration

* safe_mode

* socket



### Define a handler



```ruby

sensu_handler "pagerduty" do

  type "pipe"

  command "pagerduty.rb"

  severities ["ok", "critical"]

end

```



### Define a check



```ruby

sensu_check "redis_process" do

  command "check-procs.rb -p redis-server -C 1"

  handlers ["default"]

  subscribers ["redis"]

  interval 30

  additional(:notification => "Redis is not running", :occurrences => 5)

end

```



The `sensu_check` provider supports the following attributes:



* additional

* aggregate

* aggregates

* command

* cron

* handle

* handlers

* high_flap_threshold

* interval

* low_flap_threshold

* publish

* source

* subdue

* standalone

* subscribers

* timeout

* ttl

* type



### Define a filter



```ruby

sensu_filter "environment" do

  attributes(:client => {:environment => "development"})

  days(

    :all => [{ :begin => "05:00 PM", :end => "09:00 AM" }}],

    :saturday => [{ :begin => "09:00 AM", :end => "05:00 PM" }],

    :sunday => [{ :begin => "09:00 AM", :end => "05:00 PM" }]

  )

  negate true

end

```



### Define a mutator



```ruby

sensu_mutator "opentsdb" do

  command "opentsdb.rb"

end

```



### Define a custom configuration snippet



```ruby

sensu_snippet "irc" do

  content(:uri => "irc://sensu:[email protected]:6667#channel")

end

```



### Install plugins

```ruby

# define a hash of plugins (gems) WITH VERSIONS PINNED

default['MY_CUSTOM_NAMESPACE']['sensu']['plugins'] = {

  ## pretty much all checks rely on this

  'sensu-plugin' => '2.1.0',

  ## check consul

  'sensu-plugins-consul' => '1.4.1',

  ## check cpu

  'sensu-plugins-cpu-checks' => '1.1.2',

  ## check disks

  'sensu-plugins-disk-checks' => '2.4.0',

  ## check disks

  'sensu-plugins-http' => '2.6.0',

  ## check elasticsearch

  'sensu-plugins-elasticsearch' => '1.5.1',

  ## check load

  'sensu-plugins-load-checks' => '3.0.0',

  ## check memory

  'sensu-plugins-memory-checks' => '3.0.2',

  ## check network

  'sensu-plugins-network-checks' => '2.0.1',

  ## check processes

  'sensu-plugins-process-checks' => '2.4.0',

  ## check rabbitmq

  'sensu-plugins-rabbitmq' => '3.2.0',

  ## check redis

  'sensu-plugins-redis' => '2.0.0',

  ## check chef

  'sensu-plugins-chef' => '3.0.2',

  'hashie' => '3.5.6',

  ## check nginx

  'sensu-plugins-nginx' => '2.2.0'

}



# loop over each gem and install it into the sensu embedded ruby

node['MY_CUSTOM_NAMESPACE']['sensu']['plugins'].each do |plugin, version|

  sensu_gem plugin do

    version version

  end

end

```



To install gems with a Ruby other than the Sensu embedded Ruby, use Chef's [gem_package](https://docs.chef.io/resource_gem_package.html) in stead of `sensu_gem`.



## Helper modules and methods



### Run State Helpers



The `Sensu::ChefRunState` module provides helper methods which populate `node.run_state['sensu']` with arbitrary key/value pairs. This provides a means for wrapper cookbooks to populate the `node.run_state` with data required by the cookbook, e.g. SSL credentials, without cookbook itself enforcing source for that data.



**NOTE**: The `node.run_state` is not persisted locally nor on a Chef server. Data stored here exists only for the duration of the Chef run.



#### `set_sensu_state`



This method sets values inside the `node.run_state['sensu']` Mash, and expects arguments in the following order:



1. the Chef `node` object

2. one or more keys, providing the path to walk

3. the value to set at that path



Example:



`set_sensu_state(node, 'food', 'nachos', true)`



The above sets the value of `node.run_state['sensu']['food']['nachos']` to `true`.



#### `get_sensu_state`



This method retrieves the value of a key inside the `node.run_state['sensu']` Mash and expects arguments in the following order:



1. the Chef `node` object

2. one or more keys, providing the path to walk



Examples:



`get_sensu_state(node, 'food', 'nachos')` would return `true`



When no value is set for a requested path, this method returns `nil`:



`get_sensu_state(node, 'this', 'path', 'is', 'invalid')` returns `nil`



## Support



Please visit [sensuapp.org/support](http://sensuapp.org/support) for details on community and commercial

support resources, including the official IRC channel.



## Build and Release



For maintainers looking to release new versions of this cookbook you should follow this process:

1. Add any `README.md` and `CHANGELOG.md` changes with links to Pull Requests. Commit this to develop branch.

1. Update `CHANGELOG.md` with new version header and update diff links.

1. Create a commit to then tag for release I would suggest something like this `git commit -am 'prep for v$MAJOR.$MINOR.$RELEASE release'`. Commit this to develop and make sure that everything is good to go (ci passing and such).

1. Push from develop to master: `git push origin develop:master`

1. checkout master branch and pull in changes: `git checkout master && git pull`

1. Create a tagged release: `hub release create v$MAJOR.$MINOR.$PATCH` this should prompt you in an editor to modify the tag message. I typically leave it default, but feel free to include any useful release notes.

1. Use the `stove` command to push the newly versioned cookbook to the supermarket: `stove --no-git`. This assumes that you have installed `stove`, properly configured authentication, and have been granted access to the supermarket.

1. Optionally but recommended to update any associated PRs with a release link.