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Simple TOSCA orchestrator

Project description

opera aims to be a lightweight orchestrator compliant with OASIS TOSCA. The initial compliance is with the TOSCA Simple Profile YAML v1.2.


The simplest way to test opera is to install it into virtual environment:

$ mkdir ~/opera && cd ~/opera
$ python3 -m venv .venv && . .venv/bin/activate
(.venv) $ pip install opera

To test if everything is working as expected, we can now try to deploy a hello-world service:

(.venv) $ curl -L \ \
  | tar -xzf -
(.venv) $ cd xopera-examples-master/01-hello-world
(.venv) $ opera deploy hello service.yaml

If nothing went wrong, new empty file has been created at /tmp/playing-opera/hello/hello.txt.


opera requires python 3 and a virtual environment. In a typical modern Linux environment, we should already be set. In Ubuntu, however, we might need to run the following commands:

$ sudo apt update
$ sudo apt install -y python3-venv python3-wheel python-wheel-common

OpenStack client setup

Because using OpenStack modules from Ansible playbooks is quite common, we can install opera with all required OpenStack libraries by running:

(.venv) $ pip install -U opera[openstack]

Before we can actually use the OpenStack functionality, we also need to obtain the OpenStack credentials. If we log into OpenStack and navigate to the Access & Security -> API Access page, we can download the rc file with all required information.

At the start of each session (e.g., when we open a new command line console), we must source the rc file by running:

(venv) $ . openstack.rc

After we enter the password, we are ready to start using the OpenStack modules in playbooks that implement life cycle operations.

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