Book Image

OpenStack Orchestration

By : Adnan Ahmed Siddiqui
Book Image

OpenStack Orchestration

By: Adnan Ahmed Siddiqui

Overview of this book

This book is focused on setting up and using one of the most important services in OpenStack orchestration, Heat. First, the book introduces you to the orchestration service for OpenStack to help you understand the uses of the templating mechanism, complex control groups of cloud resources, and huge-potential and multiple-use cases. We then move on to the topology and orchestration specification for cloud applications and standards, before introducing the most popular IaaS cloud framework, Heat. You will get to grips with the standards used in Heat, overview and roadmap, architecture and CLI, heat API, heat engine, CloudWatch API, scaling principles, JeOS and installation and configuration of Heat. We wrap up by giving you some insights into troubleshooting for OpenStack. With easy-to-follow, step-by-step instructions and supporting images, you will be able to manage OpenStack operations by implementing the orchestration services of Heat.
Table of Contents (14 chapters)
OpenStack Orchestration
About the Author
About the Reviewers
Stack Group of Connected Cloud Resources

Troubleshooting common OpenStack errors

First of all, check that all Nova services are in a stable state:

$nova-manage service list
Binary Host Zone Status State Updated_At
nova-scheduler openstack1 nova enabled : – ) 2012-05-12 22:42:14
nova-compute openstack1 nova enabled : – ) 2012-05-12 22:42:12
nova-network openstack1 nova enabled : – ) 2012-05-12 22:42:14

Secondly, check that all nova processes are running:

$ ps -ea | grep nova
11448 ? 00:02:54 nova-cert
12072 ? 00:02:57 nova-network
12083 ? 00:10:31 nova-compute
12093 ? 00:06:40 nova-api
12117 ? 00:02:26 nova-scheduler
12154 ? 00:00:00 nova-xvpvncprox
55746 ? 00:00:00 nova-objectstor

For further insight into any errors, the log files are very helpful. The following command can be used to see the logs files:

$tail -n 400 /var/log/nova-compute

Error – internal error Failed to create mDNS client: Daemon not running

The following is the error output displayed while starting the libvirt daemon:

The solution

The problem is that the libvirt...