Quick Start

Quick Start

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

Host machine requirements

The host machine must satisfy the following minimum requirements:

  • 2 network interfaces

  • 8GB main memory

  • 40GB disk space

Install dependencies

Typically commands that use the system package manager in this section must be run with root privileges.

It is generally recommended to use a virtual environment to install Kolla Ansible and its dependencies, to avoid conflicts with the system site packages. Note that this is independent from the use of a virtual environment for remote execution, which is described in Virtual Environments.

  1. For CentOS, install EPEL.

    sudo yum install epel-release
    
  2. For Ubuntu, update the package index.

    sudo apt-get update
    
  3. Install Python build dependencies:

    For CentOS, run:

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

    For Ubuntu, run:

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

Install dependencies using a virtual environment

If not installing Kolla Ansible in a virtual environment, skip this section.

  1. Install the virtualenv package.

    For CentOS or RHEL, run:

    sudo yum install python-virtualenv
    

    For Ubuntu, run:

    sudo apt-get install python-virtualenv
    
  2. Create a virtual environment and activate it:

    virtualenv /path/to/virtualenv
    source /path/to/virtualenv/bin/activate
    

    The virtual environment should be activated before running any commands that depend on packages installed in it.

  3. Ensure the latest version of pip is installed:

    pip install -U pip
    
  4. Install Ansible. Currently, Kolla Ansible requires Ansible 2.5+.

    pip install ansible
    

Install dependencies not using a virtual environment

If installing Kolla Ansible in a virtual environment, skip this section.

  1. Install pip.

    For CentOS or RHEL, run:

    sudo yum install python-pip
    

    For Ubuntu, run:

    sudo apt-get install python-pip
    
  2. Ensure the latest version of pip is installed:

    sudo pip install -U pip
    
  3. Install Ansible. Currently, Kolla Ansible requires Ansible 2.5+.

    For CentOS or RHEL, run:

    sudo yum install ansible
    

    For Ubuntu, run:

    sudo apt-get install ansible
    

Install Kolla-ansible

Install Kolla-ansible for deployment or evaluation

  1. Install kolla-ansible and its dependencies using pip.

    If using a virtual environment:

    pip install kolla-ansible
    

    If not using a virtual environment:

    sudo pip install kolla-ansible
    
  2. Create the /etc/kolla directory.

    sudo mkdir -p /etc/kolla
    sudo chown $USER:$USER /etc/kolla
    
  3. Copy globals.yml and passwords.yml to /etc/kolla directory.

    If using a virtual environment:

    cp -r /path/to/virtualenv/share/kolla-ansible/etc_examples/kolla/* /etc/kolla
    

    If not using a virtual environment on CentOS, run:

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

    If not using a virtual environment on Ubuntu, run:

    cp -r /usr/local/share/kolla-ansible/etc_examples/kolla/* /etc/kolla
    
  4. Copy all-in-one and multinode inventory files to the current directory.

    If using a virtual environment:

    cp /path/to/virtualenv/share/kolla-ansible/ansible/inventory/* .
    

    If not using a virtual environment on CentOS, run:

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

    If not using a virtual environment on Ubuntu, run:

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

Install Kolla for development

  1. Clone kolla and kolla-ansible repositories from git.

    git clone https://github.com/openstack/kolla
    git clone https://github.com/openstack/kolla-ansible
    
  2. Install requirements of kolla and kolla-ansible:

    If using a virtual environment:

    pip install -r kolla/requirements.txt
    pip install -r kolla-ansible/requirements.txt
    

    If not using a virtual environment:

    sudo pip install -r kolla/requirements.txt
    sudo pip install -r kolla-ansible/requirements.txt
    
  3. Create the /etc/kolla directory.

    sudo mkdir -p /etc/kolla
    sudo chown $USER:$USER /etc/kolla
    
  4. Copy the configuration files to /etc/kolla directory. kolla-ansible holds the configuration files ( globals.yml and passwords.yml) in etc/kolla.

    cp -r kolla-ansible/etc/kolla/* /etc/kolla
    
  5. Copy the inventory files to the current directory. kolla-ansible holds inventory files ( all-in-one and multinode) in the ansible/inventory directory.

    cp kolla-ansible/ansible/inventory/* .
    

Configure Ansible

For best results, Ansible configuration should be tuned for your environment. For example, add the following options to the Ansible configuration file /etc/ansible/ansible.cfg:

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

Further information on tuning Ansible is available here.

Prepare initial configuration

Inventory

The next step is to prepare our inventory file. An inventory is an Ansible file where we specify hosts and the groups that they belong to. We can use this to define node roles and access credentials.

Kolla-Ansible comes with all-in-one and multinode example inventory files. The 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:

  1. 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 clause 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.

  2. Check whether the configuration of inventory is correct or not, run:

    ansible -i multinode all -m ping
    

    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 -i multinode all -m raw -a "apt-get -y install python-dev"

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 Building Container Images.

    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 Rocky images set

    openstack_release: "rocky"
    

    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 rocky. 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.

  • Virtual environment

    It is recommended to use a virtual environment to execute tasks on the remote hosts. This is covered Virtual Environments.

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.

The following assumes the use of the multinode inventory. If using a different inventory, such as all-in-one, replace the -i argument accordingly.

  • 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

  1. Install the OpenStack CLI client:

    pip install python-openstackclient
    
  2. OpenStack requires an openrc file where credentials for admin user are set. To generate this file:

    • For deployment or evaluation, run:

      kolla-ansible post-deploy
      . /etc/kolla/admin-openrc.sh
      
    • For development, run:

      cd kolla-ansible/tools
      ./kolla-ansible post-deploy
      . /etc/kolla/admin-openrc.sh
      
  3. Depending on how you installed Kolla-Ansible, there is a script that will create example networks, images, and so on.

    • For deployment or evaluation, run init-runonce script on CentOS:

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

      Run init-runonce script on Ubuntu:

      /usr/local/share/kolla-ansible/init-runonce
      
    • For development, run:

      kolla-ansible/tools/init-runonce
      
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