Heat and DevStack

Heat is fully integrated into DevStack. This is a convenient way to try out or develop heat alongside the current development state of all the other OpenStack projects. Heat on DevStack works on both Ubuntu and Fedora.

These instructions assume you already have a working DevStack installation which can launch basic instances.

Configure DevStack to enable heat

Heat is configured by default on devstack for Icehouse and Juno releases.

Newer versions of OpenStack require enabling heat services in devstack local.conf. Add the following to [[local|localrc]] section of local.conf:

[[local|localrc]]

#Enable heat services
enable_service h-eng h-api h-api-cfn h-api-cw

Since Newton release, heat is available as a devstack plugin. To enable the plugin add the following to the [[local|localrc]] section of local.conf:

[[local|localrc]]

#Enable heat plugin
enable_plugin heat https://opendev.org/openstack/heat

To use stable branches, make sure devstack is on that branch, and specify the branch name to enable_plugin, for example:

enable_plugin heat https://opendev.org/openstack/heat stable/newton

It would also be useful to automatically download and register a VM image that heat can launch. To do that add the following to [[local|localrc]] section of local.conf:

IMAGE_URL_SITE="https://download.fedoraproject.org"
IMAGE_URL_PATH="/pub/fedora/linux/releases/36/Cloud/x86_64/images/"
IMAGE_URL_FILE="Fedora-Cloud-Base-36-1.5.x86_64.qcow2"
IMAGE_URLS+=","$IMAGE_URL_SITE$IMAGE_URL_PATH$IMAGE_URL_FILE

URLs for any cloud image may be specified, but fedora images from F20 contain the heat-cfntools package which is required for some heat functionality.

That is all the configuration that is required. When you run ./stack.sh the heat processes will be launched in screen with the labels prefixed with h-.

Configure DevStack to enable ceilometer and aodh (if using alarms)

To use aodh alarms you need to enable ceilometer and aodh in devstack. Adding the following lines to [[local|localrc]] section of local.conf will enable the services:

CEILOMETER_BACKEND=mongodb
enable_plugin ceilometer https://opendev.org/openstack/ceilometer
enable_plugin aodh https://opendev.org/openstack/aodh

Configure DevStack to enable OSprofiler

Adding the following line to [[local|localrc]] section of local.conf will add the profiler notifier to your ceilometer:

CEILOMETER_NOTIFICATION_TOPICS=notifications,profiler

Enable the profiler in /etc/heat/heat.conf:

$ echo -e "[profiler]\nenabled = True\n"\
"trace_sqlalchemy = True\n"\
"hmac_keys = SECRET_KEY\n"\
>> /etc/heat/heat.conf

Run any command with –profile SECRET_KEY:

$ heat --profile SECRET_KEY stack-list
# it will print <Trace ID>

Get pretty HTML with traces:

$ osprofiler trace show --html <Trace ID>

Note that osprofiler should be run with the admin user name & tenant.

Create a stack

Now that you have a working heat environment you can go to Creating your first stack.