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Project Layout

.
+-- coreos-box/                        CoreOS box defintion (master and worker are the same box)
|   +-- files/                         Files to copy or run on the CoreOS box
|   +-- scripts/                       Scripts to run to provision the coreos box
|   +-- build_box.sh                   Builds the box and registers it with vagrant
|   +-- coreos.json                    Defines how to build the box
|
+-- Vagrantfile                        Defines how to start the cluster locally
+-- user-data                          Cloud-init configuration - tells CoreOS how to load our services

Required Software

  1. Packer - https://www.packer.io/
  2. Virtual Box - https://www.virtualbox.org/
  3. Vagrant - https://vagrantup.com - Make sure to install to a path without spaces!
  4. A UNIX capable shell.

Getting Started (Local Edition)

IMPORTANT: Unless otherwise specified all commands must be run from the root directory.

Build the coreos image (will take 10-15 minutes):

cd coreos-box
./build_box.sh

Install:

  • MacOSX: install_on_mac.sh
  • Manual: Create the NCP_INFRASTRUCTURE_HOME environment variable and set it to the absolute path of the root folder.

Install required vagrant plugins:

vagrant plugin install vagrant-reload

Spin up the cluster:

vagrant up

You're good to go!

CoreOS Box Environment Variables

The CoreOS host image expects the following environment variables to be written to /etc/ncp_environment on each host

  • NCP_UNIQUE_CLOUD_ID (master only): A unique integer between 1-255. Should correspond to the order the machines are listed in NCP_MASTERS.
  • NCP_IP: The IP to use for communication between services. Typically this is the internal private-network IP (example: 172.17.8.100).
  • NCP_MASTERS: A space-seperated list of IPs containing all master IPs.
  • NCP_NUM_MASTERS: The number of masters that are being provisioned. Should correspond to the number of IPs in NCP_MASTERS

Useful URLs

Mesos UI: http://172.17.8.100:5050/ Marathon UI: http://172.17.8.100:8080/ Consul UI: http://172.17.8.100:8500/ui/

Troubleshooting

If 'could not open a connection to your authentication agent':

eval $(ssh-agent)

If 'Authentication failure. Retrying...':

ssh-add ~/.vagrant.d/insecure_private_key

If 'An error occured while installing json-1.8.2 and bundler cannot continue...':

Uninstall and Reinstall vagrant to a path without spaces and try again.