consul-cluster

Templates for launching Consul clusters.

Vagrant

Requires Vagrant 1.6 or above.

git clone git@github.com:romesh-mccullough/consul-cluster.git
cd consul-cluster/vagrant

vagrant plugin install vagrant-auto_network
vagrant plugin install vagrant-hostmanager
vagrant plugin install vagrant-berkshelf

vagrant up

By default, this will create 3 Consul servers running on Ubuntu 12.04 add them to your local hosts file. They will be given the hostnames consul0, consul1, and consul2

consul0 will be started in bootstrap mode and run the web ui. consul1 and consul2 will automatically register with consul0 and form the cluster.

If you want to play around with manually joining servers set AUTO_JOIN = false at the top of the Vagrantfile. You can then:

vagrant ssh consul1
consul join consul0
exit

vagrant ssh consul2
consul join consul0
exit

Once the cluster has started you can access the web ui by going to http://consul0:8500/ui

Basic Usage

Check out these guides for more detail:

• http://www.consul.io/docs/guides/external.html
• http://www.consul.io/intro/getting-started/kv.html
• http://www.consul.io/docs/agent/http.html
• http://www.consul.io/docs/agent/dns.html

Register a new service with the HTTP API

curl -X PUT -d '{"Datacenter": "vagrant-dc", "Node": "google", "Address": "www.google.com",
"Service": {"Service": "search", "Port": 80}}' http://consul0:8500/v1/catalog/register

Set a key value pair with the HTTP API

curl -X PUT -d 'bar' http://consul0:8500/v1/kv/foo

Use the DNS interface

dig @consul0 -p 8600 search.service.consul.

Query the HTTP API

• For all services

curl consul0:8500/v1/catalog/services

• For all nodes in a service

curl consul0:8500/v1/catalog/service/search
curl consul0:8500/v1/catalog/service/consul

• For a key

curl -X PUT -d 'bar' http://consul0:8500/v1/kv/foo