Book Image

Production Ready OpenStack - Recipes for Successful Environments

By : Arthur Berezin
Book Image

Production Ready OpenStack - Recipes for Successful Environments

By: Arthur Berezin

Overview of this book

OpenStack is the most popular open source cloud platform used by organizations building internal private clouds and by public cloud providers. OpenStack is designed in a fully distributed architecture to provide Infrastructure as a Service, allowing us to maintain a massively scalable cloud infrastructure. OpenStack is developed by a vibrant community of open source developers who come from the largest software companies in the world. The book provides a comprehensive and practical guide to the multiple uses cases and configurations that OpenStack supports. This book simplifies the learning process by guiding you through how to install OpenStack in a single controller configuration. The book goes deeper into deploying OpenStack in a highly available configuration. You'll then configure Keystone Identity Services using LDAP, Active Directory, or the MySQL identity provider and configure a caching layer and SSL. After that, you will configure storage back-end providers for Glance and Cinder, which will include Ceph, NFS, Swift, and local storage. Then you will configure the Neutron networking service with provider network VLANs, and tenant network VXLAN and GRE. Also, you will configure Nova's Hypervisor with KVM, and QEMU emulation, and you will configure Nova's scheduler filters and weights. Finally, you will configure Horizon to use Apache HTTPD and SSL, and you will customize the dashboard's appearance.
Table of Contents (16 chapters)
Production Ready OpenStack - Recipes for Successful Environments
About the Author
About the Reviewers

Installing RabbitMQ

OpenStack uses a message broker for components to inner communicate. Red Hat-based operating systems (for example, RHEL, CentOS, and Fedora) can run RabbitMQ or QPID message brokers. Both provide roughly similar performance, but as RabbitMQ is more widely used message broker with OpenStack, we are going use it as a message broker for our OpenStack environment.

How to do it...

  1. Install RabbitMQ from the yum repository:

    Run the following commands on the controller node!

     [root@controller ~]# yum install rabbitmq-server -y

    RabbitMQ is written in erlang and will probably bring some erlang dependency packages along.

  2. To start the RabbitMQ Linux services, start a service named rabbitmq-server:

    [root@controller ~]# systemctl start rabbitmq-server.service
  3. Now enable it, to make sure that it starts on a system reboot:

    [root@controller ~]# systemctl enable rabbitmq-server.service

There's more...

RabbitMQ maintains its own user accounts and passwords. By default, the user name guest is created with the default password guest. As it is a major security concern to keep default password, we should change this password. We can use the command rabbitmqctl to change guest's account password:

[root@controller ~]# rabbitmqctl change_password guest guest_password
Changing password for user "guest" ...

We need to allow other services to be able to access the message broker over the firewall using firewall-cmd command:

[root@controller ~]# firewall-cmd --add-port=5672/tcp --permanent