Openstack-Ansible is a Rackspace initiative that provides an automated way to deploy OpenStack using Ansible playbooks and roles. It pulls services from Git repositories and uses LXC containers and Ansible to deploy OpenStack on single to thousands of nodes in a scalable way. The document discusses why OpenStack deployment is difficult, outlines the OSAD architecture, configuration, and usage, and how OpenStack services are deployed and scaled out to additional compute nodes using Openstack-Ansible.

1. © 2016 IBM Corporation
Deploying OpenStack using Ansible
Openstack Day India Event 2016
Chhavi Agarwal
IBM

2. © 2016 IBM Corporation
Openstack Day India Event 2016
Agenda
 What is Openstack-Ansible ?
 Why we need it ?
 OSAD Architecture
 OSAD Configuration
 How to use it ?
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3. © 2016 IBM Corporation
Openstack Day India Event 2016
Why we need Openstack Ansible
 Openstack is hard to install and configure.
 Out of band configuration issues
 Legacy architecture does not scale well.
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4. © 2016 IBM Corporation
Openstack Day India Event 2016
Openstack Ansible
“Deploying OpenStack from source in a way that makes it scalable while also being
simple to operate, upgrade, and grow.”
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Openstack Day India Event 2016
Openstack Ansible
 Openstack-Ansible is a Rackspace Initiatives.
 Provides a production ready deployment.
 It uses the power of Ansible.
 Services are pulled and deployed from the Git Source repositories.
 It uses LXC containers to deploy Openstack services.
 Easy to deploy and scale private clouds from single to even thousand nodes.
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6. © 2016 IBM Corporation
Openstack Day India Event 2016
Why Ansible
 Ansible provides an automated IT framework for cloud provisioning, configuration
and application deployment.
 It uses a very simple YAML language for playbooks and roles.
 Ansible manages system using SSH, so no remote agents or daemons needed
 Allows parallel task execution.
 Ansible contains a rich set of > 200 built-in modules
 Playbooks are simple and can be easily fine-tuned as per requirement.
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7. © 2016 IBM Corporation
Openstack Day India Event 2016
Why LXC Containers
 Openstack runs services in LXC containers ~ Bare-metal.
 Provides OS level virtualization include CPU, memory and block I/O.
 Compatible with many network architectures.
 Supports LVM Backend
 Stable and provides Scalability.
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8. © 2016 IBM Corporation
Openstack Day India Event 2016
Openstack Ansible Host Layout
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Redundant 10Gb Network Switches
Infrastructure Control
Plane
Nova
Heat
Glance
keystone
Neutron cinder
Horizon
Galera
Memcached
RabbitMQ
Compute
Plane (n)
Storage
Plane (n)
Cinder-
volume
iSCSI
targets
Ceph
nodes
Bond0
Bond0
Bond1
Bond1
Bond1
Infrastructure
Logging
Host
Rsyslog
Logstash
ELK
Bond0
Bond1
External
Networks
Load
Balancers
Bond0
Bond1
Openstack services
Infrastructure services
Deploy
ment
Host
Ansible
Bond 0 Management Network
Bond 1 VM Network

9. © 2016 IBM Corporation
Openstack Day India Event 2016
Openstack-Ansible Requirement
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 16GB RAM, 100GB Disk
 Ubuntu 14.04 LTS
 Secure Shell (SSH) client and server that supports public key authentication
 Network Time Protocol (NTP) client for time synchronization.
 Python 2.7 or later.

10. © 2016 IBM Corporation
Openstack Day India Event 2016
Openstack-Ansible configuration
 /etc/Openstack-user-config.yml
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Openstack Day India Event 2016
Openstack-Ansible Configuration
 Located in /etc/openstack_deploy
– Openstack-user-config.yml
– user_variables.yml
– user_secrets.yml
 conf.d  Define additional services like swift, ceph, haproxy
 /etc/openstack_deploy/env.d/*  Used to defined additional group mapping.
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12. © 2016 IBM Corporation
Openstack Day India Event 2016
OSA All-In-One Installation
 Install on a fresh Ubuntu 14.04 host
– # git clone https://github.com/openstack/openstack-ansible
/opt/openstack-ansible
– # cd /opt/openstack-ansible
– # scripts/bootstrap-ansible.sh // Installs Ansible, roles and modules
– # scripts/bootstrap-aio.sh // Sets up host and config files
– # vi /etc/openstack_deploy/... // Optional: If u want to make any changes
– # scripts/run-playbooks.sh // Install Openstack Services
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13. © 2016 IBM Corporation
Openstack Day India Event 2016
Adding a Compute Node
 Edit the /etc/openstack_deploy/openstack_user_config.yml file and add the host to the compute_hosts
stanza.
 # cd /opt/openstack-ansible/playbooks
 # openstack-ansible setup-hosts.yml --limit NEW_HOST_NAME
 # openstack-ansible setup-openstack.yml --skip-tags nova-key-distribute --limit NEW_HOST_NAME
 # openstack-ansible setup-openstack.yml --tags nova-key --limit compute_hosts
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14. © 2016 IBM Corporation
Openstack Day India Event 2016
Openstack-Ansible Community
 Openstack-Ansible is evolving project.
 Partners: Rackspace, cisco, hp, Time-warner
 Enough scopes for feature enhancement
 Code Location : https://github.com/openstack-ansible/openstack-ansible
 IRC Channel: chat.freenode.net #Openstack-ansible
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Openstack Day India Event 2016
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