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Commands

The pycompose command compiles composition code to a portable JSON format. The pydeploy command deploys JSON-encoded compositions. These commands are intended as a minimal complement to the OpenWhisk CLI. The OpenWhisk CLI already has the capability to configure, invoke, and delete compositions since these are just OpenWhisk actions but lacks the capability to create composition actions. The pycompose and pydeploy commands bridge this gap. They make it possible to deploy compositions as part of the development cycle or in shell scripts. They do not replace the OpenWhisk CLI however as they do not duplicate existing OpenWhisk CLI capabilities.

Compose

pycompose

Usage:
  compose composition.py [flags]
Flags:
  --ast                  only output the ast for the composition
  -v, --version          output the composer version

The pycompose command takes a Python script that defines main() returning a composition object (for example demo.py) and compiles this object to a portable JSON format on the standard output.

compose demo.py > demo.json

If the --ast option is specified, the pycompose command only outputs a JSON representation of the Abstract Syntax Tree for the composition.

Deploy

pydeploy

Usage:
  pydeploy composition composition.json [flags]
Flags:
  -a, --annotation KEY=VALUE        add KEY annotation with VALUE
  -A, --annotation-file KEY=FILE    add KEY annotation with FILE content
  --apihost HOST                    API HOST
  -i, --insecure                    bypass certificate checking
  -u, --auth KEY                    authorization KEY
  -v, --version                     output the composer version
  -w, --overwrite                   overwrite actions if already defined

The pydeploy command deploys a JSON-encoded composition with the given name.

pydeploy demo demo.json -w

ok: created /_/authenticate,/_/success,/_/failure,/_/demo

The pydeploy command synthesizes and deploys a conductor action that implements the composition with the given name. It also deploys the composed actions for which definitions are provided as part of the composition.

The pydeploy command outputs the list of deployed actions or an error result. If an error occurs during deployment, the state of the various actions is unknown.

The -w option authorizes the pydeploy command to overwrite existing definitions. More precisely, it deletes the deployed actions before recreating them. As a result, default parameters, limits, and annotations on preexisting actions are lost.

Annotations

The pydeploy command implicitly annotates the deployed composition action with the required conductor annotations. Other annotations may be specified by means of the flags:

  -a, --annotation KEY=VALUE        add KEY annotation with VALUE
  -A, --annotation-file KEY=FILE    add KEY annotation with FILE content

OpenWhisk instance

Like the OpenWhisk CLI, the pydeploy command supports the following flags for specifying the OpenWhisk instance to use:

  --apihost HOST                    API HOST
  -i, --insecure                    bypass certificate checking
  -u, --auth KEY                    authorization KEY

If the --apihost flag is absent, the environment variable __OW_API_HOST is used in its place. If neither is available, the pydeploy command extracts the APIHOST key from the whisk property file for the current user.

If the --auth flag is absent, the environment variable __OW_API_KEY is used in its place. If neither is available, the pydeploy command extracts the AUTH key from the whisk property file for the current user.

The default path for the whisk property file is $HOME/.wskprops. It can be altered by setting the WSK_CONFIG_FILE environment variable.