openstack/kolla-ansible
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kolla-ansible/docs/vagrant.md
Harm Weites 37561cc1f7 Vagrantfile and docs 
With Vagrant it becomes real easy to create a dev environment to
test and checkout $code. The focus is specifically on setting up
an environment to play around in, developing Kolla and showing
what it is capable of in a clean virtualised environment. When
done, the environment can be destroy and re-created at will when
needed.

Change-Id: I440d004e76c337f298cad2397cf4c13f2cc35ddb
Implements: blueprint vagrant-devenv
2015-07-31 20:13:34 +02:00

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Vagrant up!

This guide describes how to use Vagrant to assist in developing for Kolla.

Vagrant is a tool to assist in scripted creation of virtual machines, it will take care of setting up a CentOS-based cluster of virtual machines, each with proper hardware like memory amount and number of network interfaces.

Getting Started

The vagrant setup will build a cluster with the following nodes:

  • 3 support nodes
  • 1 compute node
  • 1 operator node

Kolla runs from the operator node to deploy OpenStack on the other nodes.

All nodes are connected with each other on the secondary nic, the primary nic is behind a NAT interface for connecting with the internet. A third nic is connected without IP configuration to a public bridge interface. This may be used for Neutron/Nova to connect to instances.

Start with downloading and installing the Vagrant package for your distro of choice. Various downloads can be found here. After we will install the hostmanager plugin so all hosts are recorded in /etc/hosts (inside each vm):

vagrant plugin install vagrant-hostmanager

Vagrant supports a wide range of virtualization technologies, of which we will use VirtualBox for now.

Find some place in your homedir and checkout the Kolla repo

git clone https://github.com/stackforge/kolla.git ~/dev/kolla

You can now tweak the Vagrantfile or start a CentOS7-based cluster right away:

cd ~/dev/kolla/vagrant && vagrant up

The command vagrant up will build your cluster, vagrant status will give you a quick overview once done.

Vagrant Up

Once vagrant has completed deploying all nodes, we can focus on launching Kolla. First, connect with the operator node:

vagrant ssh operator

Once connected you can run a simple Ansible-style ping to verify if the cluster is operable:

ansible -i kolla/ansible/inventory/multinode all -m ping -e ansible_ssh_user=root

Congratulations, your cluster is usable and you can start deploying OpenStack using Ansible!

To speed things up, there is a local registry running on the operator. All nodes are configured so they can use this insecure repo to pull from, and they will use it as mirror. Ansible may use this registry to pull images from.

All nodes have a local folder shared between the group and the hypervisor, and a folder shared between all nodes and the hypervisor. This mapping is lost after reboots, so make sure you use the command vagrant reload <node> when reboots are required. Having this shared folder you have a method to supply a different docker binary to the cluster. The shared folder is also used to store the docker-registry files, so they are save from destructive operations like vagrant destroy.

Further Reading

All Vagrant documentation can be found on their website.