kolla-ansible/doc/source/user/quickstart.rst

Quick Start

This guide provides step by step instructions to deploy OpenStack using Kolla on bare metal servers or virtual machines.

Recommended reading

It's beneficial to learn basics of both Ansible and Docker before running Kolla-Ansible.

Host machine requirements

The host machine must satisfy the following minimum requirements:

• 2 network interfaces
• 8GB main memory
• 40GB disk space

Note

Root access to the deployment host machine is required.

Install dependencies

Make sure the pip package manager is installed and upgraded to the latest before proceeding.

For CentOS, run:

yum install epel-release
yum install python-pip
pip install -U pip

For Ubuntu, run:

apt-get update
apt-get install python-pip
pip install -U pip

To build the code with pip package manager, install the following dependencies:

For CentOS, run:

yum install python-devel libffi-devel gcc openssl-devel libselinux-python

For Ubuntu, run:

apt-get install python-dev libffi-dev gcc libssl-dev python-selinux

Kolla deploys OpenStack using Ansible. Install Ansible from distribution packaging if the distro packaging has recommended version available.

Some implemented distro versions of Ansible are too old to use distro packaging. Currently, CentOS and RHEL package Ansible >2.0 which is suitable for use with Kolla. Note that you will need to enable access to the EPEL repository to install via yum -- to do so, take a look at Fedora's EPEL docs and FAQ.

On CentOS or RHEL systems, this can be done using:

yum install ansible

Many DEB based systems do not meet Kolla's Ansible version requirements. It is recommended to use pip to install Ansible >2.0. Finally Ansible >2.0 may be installed using:

pip install -U ansible

Note

It is recommended to use virtualenv to install non-system packages.

If DEB based systems include a version of Ansible that meets Kolla's version requirements it can be installed by:

apt-get install ansible

It's beneficial to add the following options to ansible configuration file /etc/ansible/ansible.cfg:

[defaults]
host_key_checking=False
pipelining=True
forks=100

Install Kolla-ansible

Install Kolla-ansible for deployment or evaluation

Install kolla-ansible and its dependencies using pip.

pip install kolla-ansible

Copy globals.yml and passwords.yml to /etc/kolla directory.

For CentOS, run:

cp -r /usr/share/kolla-ansible/etc_examples/kolla /etc/kolla/

For Ubuntu, run:

cp -r /usr/local/share/kolla-ansible/etc_examples/kolla /etc/kolla/

Copy the all-in-one and multinode inventory files to the current directory.

For CentOS, run:

cp /usr/share/kolla-ansible/ansible/inventory/* .

For Ubuntu, run:

cp /usr/local/share/kolla-ansible/ansible/inventory/* .

Install Kolla for development

Clone the Kolla and Kolla-Ansible repositories from git.

git clone https://github.com/openstack/kolla
git clone https://github.com/openstack/kolla-ansible

Kolla-ansible holds the configuration files (globals.yml and passwords.yml) in etc/kolla. Copy the configuration files to /etc/kolla directory.

cp -r kolla-ansible/etc/kolla /etc/kolla/

Kolla-ansible holds the inventory files (all-in-one and multinode) in ansible/inventory. Copy the inventory files to the current directory.

cp kolla-ansible/ansible/inventory/* .

Prepare initial configuration

Inventory

Next step is to prepare our inventory file. Inventory is an ansible file where we specify node roles and access credentials.

Kolla-Ansible comes with all-in-one and multinode example inventory files. Difference between them is that the former is ready for deploying single node OpenStack on localhost. If you need to use separate host or more than one node, edit multinode inventory:

Edit the first section of multinode with connection details of your environment, for example:

[control]
10.0.0.[10:12] ansible_user=ubuntu ansible_password=foobar ansible_become=true
# Ansible supports syntax like [10:12] - that means 10, 11 and 12.
# Become clausule means "use sudo".

[network:children]
control
# when you specify group_name:children, it will use contents of group specified.

[compute]
10.0.0.[13:14] ansible_user=ubuntu ansible_password=foobar ansible_become=true

[monitoring]
10.0.0.10
# This group is for monitoring node.
# Fill it with one of the controllers' IP address or some others.

[storage:children]
compute

[deployment]
localhost       ansible_connection=local become=true
# use localhost and sudo

To learn more about inventory files, check Ansible documentation.

To confirm that our inventory is correct, run:

ansible -m ping all

Note

Ubuntu might not come with python pre-installed. That will cause errors in ping module. To quickly install python with ansible you can run ansible -m raw -a "apt-get -y install python-dev all"

Kolla passwords

Passwords used in our deployment are stored in /etc/kolla/passwords.yml file. All passwords are blank in this file and have to be filled either manually or by running random password generator:

For deployment or evaluation, run:

kolla-genpwd

For development, run:

cd kolla-ansible/tools
./generate_passwords.py

Kolla globals.yml

globals.yml is the main configuration file for Kolla-Ansible. There are a few options that are required to deploy Kolla-Ansible:

• Image options

  User has to specify images that are going to be used for our deployment. In this guide DockerHub provided pre-built images are going to be used. To learn more about building mechanism, please refer image building documentation.

  Kolla provides choice of several Linux distributions in containers:

  • Centos
  • Ubuntu
  • Oraclelinux
  • Debian
  • RHEL

  For newcomers, we recommend to use CentOS 7 or Ubuntu 16.04.

  kolla_base_distro: "centos"

  Next "type" of installation needs to be configured. Choices are:

  binary

  using repositories like apt or yum

  source

  using raw source archives, git repositories or local source directory

  Note

  This only affects OpenStack services. Infrastructure services like Ceph are always "binary".

  Note

  Source builds are proven to be slightly more reliable than binary.

  kolla_install_type: "source"

  To use DockerHub images, the default image tag has to be overridden. Images are tagged with release names. For example to use stable Pike images set

  openstack_release: "pike"

  It's important to use same version of images as kolla-ansible. That means if pip was used to install kolla-ansible, that means it's latest stable version so openstack release should be set to pike. If git was used with master branch, DockerHub also provides daily builds of master branch (which is tagged as master):

  openstack_release: "master"

• Networking

  Kolla-Ansible requires a few networking options to be set. We need to set network interfaces used by OpenStack.

  First interface to set is "network_interface". This is the default interface for multiple management-type networks.

  network_interface: "eth0"

  Second interface required is dedicated for Neutron external (or public) networks, can be vlan or flat, depends on how the networks are created. This interface should be active without IP address. If not, instances won't be able to access to the external networks.

  neutron_external_interface: "eth1"

  To learn more about network configuration, refer Network overview.

  Next we need to provide floating IP for management traffic. This IP will be managed by keepalived to provide high availability, and should be set to be not used address in management network that is connected to our network_interface.

  kolla_internal_vip_address: "10.1.0.250"

• Enable additional services

  By default Kolla-Ansible provides a bare compute kit, however it does provide support for a vast selection of additional services. To enable them, set enable_* to "yes". For example, to enable Block Storage service:

  enable_cinder: "yes"

  Kolla now supports many OpenStack services, there is a list of available services. For more information about service configuration, Please refer to the Services Reference Guide.

Deployment

After configuration is set, we can proceed to the deployment phase. First we need to setup basic host-level dependencies, like docker.

Kolla-Ansible provides a playbook that will install all required services in the correct versions.

• For deployment or evaluation, run:

  1. Bootstrap servers with kolla deploy dependencies:

     kolla-ansible -i ./multinode bootstrap-servers

  2. Do pre-deployment checks for hosts:

     kolla-ansible -i ./multinode prechecks

  3. Finally proceed to actual OpenStack deployment:

     kolla-ansible -i ./multinode deploy

• For development, run:

  1. Bootstrap servers with kolla deploy dependencies:

     cd kolla-ansible/tools
     ./kolla-ansible -i ./multinode bootstrap-servers

  2. Do pre-deployment checks for hosts:

     ./kolla-ansible -i ./multinode prechecks

  3. Finally proceed to actual OpenStack deployment:

     ./kolla-ansible -i ./multinode deploy

When this playbook finishes, OpenStack should be up, running and functional! If error occurs during execution, refer to troubleshooting guide.

Using OpenStack

OpenStack requires an openrc file where credentials for admin user etc are set. To generate this file run

kolla-ansible post-deploy
. /etc/kolla/admin-openrc.sh

Install basic OpenStack CLI clients:

pip install python-openstackclient python-glanceclient python-neutronclient

Depending on how you installed Kolla-Ansible, there is script that will create example networks, images, and so on.

For pip install and CentOS host:

. /usr/share/kolla-ansible/init-runonce

For pip install and Ubuntu host:

. /usr/local/share/kolla-ansible/init-runonce

For git pulled source:

. kolla-ansible/tools/init-runonce