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. Vagrant takes care of setting up CentOS-based VMs for Kolla development, each with proper hardware like memory amount and number of network interfaces.
The Vagrant script implements All-in-One (AIO) or multi-node deployments. AIO is the default.
In the case of multi-node deployment, the Vagrant setup builds a cluster with the following nodes by default:
The cluster node count can be changed by editing the Vagrantfile.
Kolla runs from the operator node to deploy OpenStack.
All nodes are connected with each other on the secondary NIC. The primary NIC is behind a NAT interface for connecting with the Internet. The third NIC is connected without IP configuration to a public bridge interface. This may be used for Neutron/Nova to connect to instances.
Start by downloading and installing the Vagrant package for the distro of choice. Various downloads can be found at the Vagrant downloads.
On Fedora 22 it is as easy as:
sudo dnf install vagrant ruby-devel libvirt-devel libvirt-python
On Ubuntu 14.04 it is as easy as:
sudo apt-get install ruby-libvirt python-libvirt libvirt-dev nfs-kernel-server
Note: Many distros ship outdated versions of Vagrant by default. When in doubt, always install the latest from the downloads page above.
Next 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. This documentation describes libvirt. To install vagrant-libvirt plugin:
vagrant plugin install --plugin-version ">= 0.0.31" vagrant-libvirt
Some Linux distributions offer vagrant-libvirt packages, but the version they provide tends to be too old to run Kolla. A version of >= 0.0.31 is required.
Setup NFS to permit file sharing between host and VMs. Contrary to the rsync method, NFS allows both way synchronization and offers much better performance than VirtualBox shared folders. On Fedora 22:
sudo systemctl start nfs-server
firewall-cmd --permanent --add-port=2049/udp
firewall-cmd --permanent --add-port=2049/tcp
firewall-cmd --permanent --add-port=111/udp
firewall-cmd --permanent --add-port=111/tcp
sudo systemctl restart firewalld
Find a location in the system’s home directory and checkout the Kolla repo:
git clone https://github.com/openstack/kolla.git
Developers can now tweak the Vagrantfile or bring up the default AIO Centos7-based environment:
cd kolla/dev/vagrant && vagrant up
The command vagrant status provides a quick overview of the VMs composing the environment.
Once Vagrant has completed deploying all nodes, the next step is to launch Kolla. First, connect with the operator node:
vagrant ssh operator
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 use it as a 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 to use the command vagrant reload <node> when reboots are required. Having this shared folder provides 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.
Once logged on the operator VM call the kolla-build utility:
kolla-build
kolla-build accept arguments as documented in Building Container Images. It builds Docker images and pushes them to the local registry if the push option is enabled (in Vagrant this is the default behaviour).
Deploy AIO with:
sudo kolla-ansible deploy
Deploy multinode with:
sudo kolla-ansible deploy -i /usr/share/kolla/ansible/inventory/multinode
Validate OpenStack is operational:
kolla-ansible post-deploy
source /etc/kolla/admin-openrc.sh
openstack user list
Or navigate to http://10.10.10.254/ with a web browser.
All Vagrant documentation can be found at docs.vagrantup.com.