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Provision a Deis Cluster on OpenStack

NOTE OpenStack support for Deis was contributed by @shakim. OpenStack support is untested by the Deis team, so we rely on the community to improve these scripts and to fix bugs. We greatly appreciate the help!

Prerequisites:

Make sure that the following utilities are installed and in your execution path:

  • nova
  • neutron

Configure nova

Create an openrc.sh file to match the following:

[production]
OS_AUTH_URL = {openstack_auth_url}
OS_USERNAME = {openstack_username}
OS_PASSWORD = {openstack_api_key}
OS_TENANT_ID = {openstack_tenant_id}
OS_TENANT_NAME = {openstack_tenant_name}

(Alternatively, download OpenStack RC file from Horizon/Access & Security/API Access.)

Source your nova credentials:

# source openrc.sh

Set up your keys

Choose an existing keypair or upload a new public key, if desired.

$ nova keypair-add --pub-key ~/.ssh/deis.pub deis-key

Customize cloud-config.yml

Edit user-data and add a discovery URL. This URL will be used by all nodes in this Deis cluster. You can get a new discovery URL by sending a request to http://discovery.etcd.io/new.

Choose number of instances

By default, the provision script will provision 3 servers. You can override this by setting DEIS_NUM_INSTANCES:

$ DEIS_NUM_INSTANCES=5 ./provision-openstack-cluster.sh deis-key

Note that for scheduling to work properly, clusters must consist of at least 3 nodes and always have an odd number of members. For more information, see optimal etcd cluster size.

Deis clusters of less than 3 nodes are unsupported.

Deis network settings

The script creates a private network called 'deis' if no such network exists.

By default, the deis subnet IP range is set to 10.21.12.0/24. To override it and the default DNS settings, set the following variables:

$ export DEIS_CIDR=10.21.12.0/24
$ export DEIS_DNS=10.21.12.3,8.8.8.8

Please note that this script does not handle floating IPs or routers. These should be provisioned manually either by Horizon or CLI

Run the provision script

Run the Openstack provision script to spawn a new CoreOS cluster. You'll need to provide the name of the CoreOS image name (or ID), and the key pair you just added. Optionally, you can also specify a flavor name.

$ cd contrib/openstack
$ ./provision-openstack-cluster.sh
Usage: provision-openstack-cluster.sh <coreos image name/id> <key pair name> [flavor]
$ ./provision-openstack-cluster.sh coreos deis-key

Choose number of routers

By default, the Makefile will provision 1 router. You can override this by setting DEIS_NUM_ROUTERS:

$ export DEIS_NUM_ROUTERS=2

Configure Deis

Set the default domain used to anchor your applications:

$ deisctl config platform set domain=mycluster.local

For this to work, you'll need to configure DNS records so you can access applications hosted on Deis. See Configuring DNS for details.

If you want to allow deis run for one-off admin commands, you must provide an SSH private key that allows Deis to gather container logs on CoreOS hosts:

$ deisctl config platform set sshPrivateKey=<path-to-private-key>

Initialize the cluster

Once the cluster is up:

  • If required, allocate and associate floating IPs to any or all of your hosts
  • Get the IP address of any of the machines from Openstack
  • set DEISCTL_TUNNEL and install the platform:
$ export DEISCTL_TUNNEL=23.253.219.94
$ deisctl install platform && deisctl start platform

The installer will deploy Deis and make sure the services start properly.

Use Deis!

After that, register with Deis!

$ deis register http://deis.example.org
username: deis
password:
password (confirm):
email: info@opdemand.com

Hack on Deis

See Hacking on Deis.