Consul4CoreOS

Fleet Unit files to bootstrap a new Consul Cluster on CoreOS

Inspired from

• https://github.com/democracyworks/consul-coreos
• https://gist.github.com/divideandconquer/08405a4fb597319d3c3e

Why ?

Since Consul brings interesting features (service catalog, DNS interface, watches) that etcd does not support, it is nice to have a Consul cluster too.

What is provided ?

• Up and running autonomous Consul cluster
• DNS service
• Automatic service declaration via Registrator

Requirements

• CoreOS cluster with etcd and fleet running
• /etc/environment file existing with COREOS_PUBLIC_IPV4 variable defined

Quick install

git clone git@github.com:vvanholl/consul4coreos.git

cd consul4coreos

./install.sh

Note that you can give options to ./install.sh, like --registrator to also add Registrator service, or --join <node> to join an existing cluster

Manual install

1. Clone this repo :

git clone git@github.com:vvanholl/consul4coreos.git

cd consul4coreos

2. Change some variables (if needed)

Open service file in your favorite editor

vi consul.service

and modify these lines :

Environment=DOCKER_REPOSITORY=gliderlabs/consul-server
Environment=DOCKER_CONTAINER=consul
Environment=CONSUL_DATACENTER=dc1

3. Submit unit file into Fleet

fleetctl submit consul.service

4. Start services

fleetctl start consul.service

5. Optional: Maybe you'll need also Registrator to declare services from running containers

fleetctl submit registrator.service

fleetctl start registrator.service