1. orchestrating multiple cloud
applications

2. Agenda
• Standards used in Heat
• Heat Overview & Roadmap
• Heat basic architecture & CLI
• JeOS & Heat-jeos CLI
• Heat installation & running
• CloudFormation Template

3. Standards used in Heat
• AWS CloudFormation
• TOSCA
Topology and Orchestration Specification for
Cloud Applications

4. Heat Overview
• Orchestrating (by stacks, updating running
stacks)
• Resource management
• CloudFormation templates
• Integrates well with Puppet and Chef
• Very active community of 9 developers from
Red Hat

5. Heat Roadmap (Folsom)
• Complete integration with Common, Glance,
Keystone, Swift, and Nova
• Complete implementation of the AWS
CloudFormation and CloudWatch API
• Instance and application HA
• Autoscaling
• Nested Stacks

6. Heat basic architecture
AMPQ
Heat API
Heat MetadataHeat Engine
DB
OpenStack
Stack
VM VM VM
RPC

7. Heat basic architecture
AMPQ
Heat API
Heat MetadataHeat Engine
DB
OpenStack
Stack
VM VM VM
RPC

8. Heat basic architecture
AMPQ
Heat API
Heat MetadataHeat Engine
DB
OpenStack
Stack
VM VM VM
RPC

9. Heat basic architecture
AMPQ
Heat API
Heat MetadataHeat Engine
DB
OpenStack
Stack
VM VM VM
RPC

10. Heat command line
heat <command> [options] [args]
• create
• delete
• describe
• update
• event-list
• list
• gettemplate
• estimate-template-cost
• validate
• resource
• resource-list
• resource-list-details

11. JeOS
• Typically, a JeOS consist of the following:
 OS core
 OS Minimum maintenance tools
 Minimum user space tools
 Packages repository
Heat-jeos tool builds virtual machine images to use with
Heat.
git clone git://github.com/
heat-api/heat-jeos.git
cd heat-jeos
sudo python setup.py install.sh

12. Heat-jeos command line
heat-jeos <command> [options] [args]
• create
• list
• tdl
• image
• register

13. Heat installation on Ubuntu (DevStack)
• Configure DevStack to enable Heat (localrc)
ENABLED_SERVICES+=,heat,h-api-cfn,
h-api-cw,h-eng,
h-meta
IMAGE_URLS+=",some_image“ (specific ones)
https://github.com/heat-api/prebuilt-
jeos-images/downloads
./stack.sh

14. Running Heat
source openrc heat service
heat list
<ListStacksResponse>
<ListStacksResult>
<StackSummaries/>
</ListStacksResult>
</ListStacksResponse>

15. Preparing Nova for running stacks
nova keypair-add heat_key
Launching a stack
heat -d create teststack
--template-file=WordPress_SI.template
--parameters="InstanceType=m1.large;
DBUsername=wp;
DBPassword=password;
KeyName=heat_key;
LinuxDistribution=F16"

16. If everything is nice
<CreateStackResponse>
<CreateStackResult>
<StackId>arn:openstack:heat:
:service:stacks/teststack/1</StackId>
</CreateStackResult>
</CreateStackResponse>
----------------------------------------
heat describe teststack <a lot of info…>

17. If something goes wrong
<StackStatusReason>
Resource Instance "WikiDatabase"
failed with:
nova reported unexpected
instance[WikiDatabase]
status[ERROR]
</StackStatusReason>
…
<StackStatus>
CREATE_FAILED
</StackStatus>

18. Anatomy of a CloudFormation Template
• Description
• Parameters
• Mappings
• Resources
• Outputs

19. Useful links
• http://heat-api.org/
• https://github.com/heat-api/heat/wiki
• https://github.com/heat-api/heat-jeos

20. Q&A
Dina Belova
dbelova@mirantis.com