7. Troubleshooting Heat | OpenStack Orchestration

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OpenStack Orchestration

By : Ahmed Siddiqui

3 (3)

OpenStack Orchestration

3 (3)

By: 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.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Getting Started with the Orchestration Service for OpenStack

1. Getting Started with the Orchestration Service for OpenStack

Introduction to the OpenStack architecture

The Orchestration service for OpenStack

The Heat workflow

The Orchestration authorization model

The authorization model configuration

Stack domain users

Summary

2. The OpenStack Architecture

2. The OpenStack Architecture

Components of OpenStack

OpenStack node types

The OpenStack logical architecture

TOSCA – Heat ideas and standards

Heat components

The example architecture 1 (based on the Nova network)

The example architecture 2 (based on Neutron)

Network layout for OpenStack networking

Summary

3. Stack Group of Connected Cloud Resources

3. Stack Group of Connected Cloud Resources

Heat basics

Autoscaling

Summary

4. Installation and Configuration of the Orchestration Service

4. Installation and Configuration of the Orchestration Service

Orchestration module concepts

OpenStack Heat installation

Creating a stack with Heat

Summary

5. Working with Heat

5. Working with Heat

Standards used in Heat

Heat overview and roadmap

The Heat architecture and CLI

The Heat basic workflow

JeOS

Summary

6. Managing Heat

6. Managing Heat

Heat and DevStack

The event stack list

Get the stack list

Create a stack

Show stack details

Show resource details

Update a stack

Delete a stack

The template structure

The CloudFormation template

Summary

7. Troubleshooting Heat

7. Troubleshooting Heat

VM instances cannot connect to the external network or the Internet

Error received during installation – Unable to write random state

Timeout error received while running jeos_create during customization

A template running with incorrect parameters cannot be deleted

Error – internal error process exited while connecting to monitor

It takes too long to create a JeOS

Error – Quota exceeded: code=InstanceLimitExceeded (HTTP 413)

Error – Response from Keystone does not contain a Heat endpoint

Error – Internal Server Error

Error – Provided KeyName is not registered with Nova

A template is not working after editing

Instances shutdown immediately after creation

Yum update fails with dependency problems related to the oz package

Failed to start qpidd

OpenStack daemons can't connect to qpidd

Ubuntu VMs cannot receive DHCP assignments from hosts running CentOS/Fedora

Debugging OpenStack Heat

Heat list returns 503 error

Heat list hangs up

Troubleshooting common OpenStack errors

Summary

Index

Index

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...

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