Question:
How do you create a virtualenv for a specific python version using ansible. Is there a command in the ansible standard library?
I would like something like:
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- virtualenv: dest=venv python_version:/usr/bin/python3 |
Answer:
I have at times experienced some erratic behaviour with specifying virtualenv_command (e.g.: getting a python 2.7 executable in my virtualenv even though I specified to run the command with virtualenv-3.4.
If you experience that problem, you can create the virtualenv manually with the command module:
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- name: Manually create the initial virtualenv command: cmd: virtualenv /user/home/venvs/myenv -p python3.4 creates: "/user/home/venvs/myenv" |
(note: by specifying creates this command will only run in the case that a virtualenv does not exist at /user/home/venvs/myenv).
Then you can install your requirements as normal with the pip command:
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- name: Install requirements pip: requirements=/my_app/requirements.txt virtualenv=/user/home/venvs/myenv |
Update
I’ve found that specifying the virtualenv_python (available in Ansible 2.0+) also seems to work in the case stated above. For example:
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- name: Install requirements pip: requirements: /my_app/requirements.txt virtualenv: /user/home/venvs/myenv virtualenv_python: python3.4 |
(with this you shouldn’t need to manually create the virtualenv first)