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10.6. Using Customized Overcloud Heat Templates
When creating the Overcloud, the director uses a default set of Heat templates. However, it is possible to copy the standard Heat templates into a local directory and use these templates for creating your Overcloud. This is useful for customizing specific parts of your Overcloud.
Copy the Heat template collection in
/usr/share/openstack-tripleo-heat-templates to the stack user's templates directory:
cp -r /usr/share/openstack-tripleo-heat-templates ~/templates/my-overcloud
$ cp -r /usr/share/openstack-tripleo-heat-templates ~/templates/my-overcloud
This creates a clone of the Overcloud Heat templates. When running
openstack overcloud deploy, we use the --templates option to specify our local template directory. This occurs later in this scenario (see Section 6.2.9, “Creating the Advanced Overcloud”).
Note
The director uses the default template directory (
/usr/share/openstack-tripleo-heat-templates) if you specify the --templates option without a directory.
Important
Red Hat provides updates to the Heat template collection over subsequent releases. Using a modified template collection can lead to a divergence between your custom copy and the original copy in
/usr/share/openstack-tripleo-heat-templates. Red Hat recommends using the methods from the following section instead of modifying the Heat template collection:
If creating a copy of the Heat template collection, you should track changes to the templates using a version control system such as
git.
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