consul-cookbook

Installs and configures Consul.

Supported Platforms

• CentOS 5.10, 6.5, 7.0
• RHEL 5.10, 6.5, 7.0
• Ubuntu 12.04, 14.04

Attributes

Key	Type	Description	Default
['consul']['version']	String	Version to install	0.4.1
['consul']['base_url']	String	Base URL for binary downloads	https://dl.bintray.com/mitchellh/consul/
['consul']['encrypt']	String	Encryption string for consul cluster.	nil
['consul']['install_method']	String	Method to install consul with when using default recipe: binary or source	binary
['consul']['install_dir']	String	Directory to install binary to.	/usr/local/bin
['consul']['service_mode']	String	Mode to run consul as: bootstrap, cluster, server, or client	bootstrap
['consul'][bootstrap_expect]	String	When bootstrapping a cluster, the number of server nodes to expect.	nil
['consul']['data_dir']	String	Location to store consul's data in	/var/lib/consul
['consul']['config_dir']	String	Location to read service definitions from (directoy will be created)	/etc/consul.d
['consul']['servers']	Array Strings	Consul servers to join	[]
['consul']['bind_addr']	String	address that should be bound to for internal cluster communications	0.0.0.0
['consul']['datacenter']	String	Name of Datacenter	dc1
['consul']['domain']	String	Domain for service lookup dns queries	.consul
['consul']['enable_syslog']	Boolean	enables logging to syslog	nil
['consul']['log_level']	String	The level of logging to show after the Consul agent has started. Available: "trace", "debug", "info", "warn", "err"	info
['consul']['node_name']	String	The name of this node in the cluster	hostname of the machine
['consul']['advertise_addr']	String	address that we advertise to other nodes in the cluster	Value of bind_addr
['consul']['init_style']	String	Service init mode for running consul as: init or runit	init
['consul']['service_user']	String	For runit service: run consul as this user (init uses 'root')	consul
['consul']['service_group']	String	For runit service: run consul as this group (init uses 'root')	consul
['consul']['bind_interface']	String	Interface to bind to, such as 'eth1'. Sets bind_addr attribute to the IP of the specified interface if it exists.	nil
['consul']['advertise_interface']	String	Interface to advertise, such as 'eth1'. Sets advertise_addr attribute to the IP of the specified interface if it exists.	nil
['consul']['extra_params']	hash	Pass a hash of extra params to the default.json config file	{}

Consul UI Attributes

Key	Type	Description	Default
['consul']['client_address']	String	Address to bind to	0.0.0.0
['consul']['client_interface']	String	Interface to advertise, such as 'eth1'. Sets advertise_addr attribute to the IP of the specified interface if it exists.	nil
['consul']['ui_dir']	String	Location to download the UI to	/var/lib/consul/ui
['consul']['serve_ui']	Boolean	Determines whether the consul service also serve's the UI	false

Usage

consul::default

This uses the binary installation recipe by default. It also starts consul at boot time.

consul::install_binary

Include consul::install_binary in your node's run_list:

{
  "run_list": [
    "recipe[consul::install_binary]"
  ]
}

consul::install_source

Include consul::install_source in your node's run_list:

{
  "run_list": [
    "recipe[consul::install_source]"
  ]
}

consul::ui

This installs the UI into a specified directory.

Include consul::ui in your node's run_list:

{
  "run_list": [
    "recipe[consul::ui]"
  ]
}

LWRP

Adding key watch

consul_key_watch_def 'key-watch-name' do
  key "/key/path"
  handler "chef-client"
end

Adding event watch

consul_event_watch_def 'event-name' do
  handler "chef-client"
end

Adding service without check

consul_service_def 'voice1' do
  port 5060
  tags ['_sip._udp']
  notifies :reload, 'service[consul]'
end

Adding service with check

consul_service_def 'voice1' do
  port 5060
  tags ['_sip._udp']
  check(
    interval: '10s',
    script: 'echo ok'
  )
  notifies :reload, 'service[consul]'
end

Removing service

consul_service_def 'voice1' do
  action :delete
  notifies :reload, 'service[consul]'
end

Be sure to notify the Consul resource to restart when your service def changes.

Getting Started

To bootstrap a consul cluster follow the following steps: 0. Make sure that ports 8300-8302 (by default, if you configured differnt ones open those) UDP/TCP are all open.

1. Bootstrap a few (preferablly 3 nodes) to be your consul servers, these will be the KV masters.
2. Put node['consul']['servers'] =["Array of the bootstrapped servers ips or dns names"] in your environment.
3. Apply the consul cookbook to these nodes with node['consul']['service_mode'] = 'cluster' (I put this in this in a CONSUL_MASTER role).
4. Let these machines converge, once you can run consul members and get a list of all of the servers your ready to move on
5. Apply the consul cookbook to the rest of your nodes with node['consul']['service_mode'] = 'client' (I put this in the environment)
6. Start added services and checks to your cookbooks.
7. If you want to get values out of consul to power your chef, curl localhost:8500/v1/kv/key/path?raw in your cookbook.

Authors

Created and maintained by John Bellone @johnbellone (jbellone@bloomberg.net) and a growing community of contributors.