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diff --git a/tosca2heat/heat-translator/doc/source/usage.rst b/tosca2heat/heat-translator/doc/source/usage.rst new file mode 100644 index 0000000..ebad0e8 --- /dev/null +++ b/tosca2heat/heat-translator/doc/source/usage.rst @@ -0,0 +1,81 @@ +===== +Usage +===== + +Use Heat-Translator with OpenStackClient (OSC) +---------------------------------------------- +Assuming that OpenStackClient (OSC) is available in your environment, you can easily install Heat-Translator to use with OSC by following three steps:: + + git clone https://github.com/openstack/heat-translator + cd heat-translator + sudo python setup.py install + +Alternatively, you can install a particular release of Heat-Translator as available at https://pypi.python.org/pypi/heat-translator. + +Once installation is complete, Heat-Translator is ready to use. Currently you can use it in following three ways. + +Translate and get output on command line. For example: :: + + openstack translate template --template-file /home/openstack/heat-translator/translator/tests/data/tosca_helloworld.yaml --template-type tosca + +Translate and save output of translated file to a desired destination. For example: :: + + openstack translate template --template-file /home/openstack/heat-translator/translator/tests/data/tosca_helloworld.yaml --template-type tosca --output-file /tmp/hot_hello_world.yaml + +Do not translate but only validate template file. For example: :: + + openstack translate template --template-file /home/openstack/heat-translator/translator/tests/data/tosca_helloworld.yaml --template-type tosca --validate-only=true + +You can learn more about available options by running following help command:: + + openstack help translate template + + +Use Heat-Translator on its own +------------------------------ +Heat-Translator can be used without any specific OpenStack environment set up as below:: + + git clone https://github.com/openstack/heat-translator + python heat_translator.py --template-file==<path to the YAML template> --template-type=<type of template e.g. tosca> --parameters="purpose=test" + +The heat_translator.py test program is at the root level of the project. The program has currently tested with TOSCA templates. +It requires two arguments:: + +1. Path to the file that needs to be translated. The file, flat yaml template or CSAR, can be specified as a local file in your +system or via URL. +2. Type of translation (e.g. tosca) + +For example, a TOSCA hello world template can be translated by running the following command from the project location:: + + python heat_translator.py --template-file=translator/tests/data/tosca_helloworld.yaml --template-type=tosca + +This should produce a translated Heat Orchestration Template on the command line. The translated content can be saved to a desired file by setting --output-file=<path>. +For example: :: + + python heat_translator.py --template-file=translator/tests/data/tosca_helloworld.yaml --template-type=tosca --output-file=/tmp/hot_helloworld.yaml + +An optional argument can be provided to handle user inputs parameters. Also, a template file can only be validated instead of translation by using --validate-only=true +optional argument. The command below shows an example usage:: + + python heat_translator.py --template-file==<path to the YAML template> --template-type=<type of template e.g. tosca> --validate-only=true + +Alternatively, you can install a particular release of Heat-Translator as available at https://pypi.python.org/pypi/heat-translator. +In this case, you can simply run translation via CLI entry point:: + heat-translator --template-file=translator/tests/data/tosca_helloworld.yaml --template-type=tosca + +Things To Consider +------------------ +* When deploying the translated template with Heat, please ensure that you have image registered in the Glance. The Heat-Translator + project sets flavor and image from a pre-defined set of values (as listed in /home/openstack/heat-translator/translator/hot/tosca/tosca_compute.py) + with the best possible match to the constraints defined in the TOSCA template. If there is no possible match found, a null value is set currently. + Per the future plan, an image and flavor will be provided from an online repository. +* The ``key_name`` property of Nova server is irrelevant to the TOSCA specification and can not be used in TOSCA template. In order to use it in + the translated templates, the user must provide it via parameters, and the heat-translator will set it to all resources of ``OS::Nova::Server`` type. +* Since properties of TOSCA Compute OS and HOST capabilities are optional, the user should make sure that either they set these properties correctly + in the TOSCA template or provide them via CLI parameters in order to find best match of flavor and image. +* The ``flavor`` and ``image`` properties of ``OS::Nova::Server`` resource is irrelevant to the TOSCA specification and can not be used in the TOSCA + template as such. Heat-Translator sets these properties in the translated template based on constraints defined per TOSCA Compute OS and HOST + capabilities. However, user may required to use these properties in template in certain circumstances, so in that case, TOSCA Compute can be extended + with these properties and later used in the node template. For a good example, refer to the ``translator/tests/data/test_tosca_flavor_and_image.yaml`` test + template. + |