molecule does not find docker within pipx venv

[stefangweichinger]

Issue Type

• Bug report

Molecule and Ansible details

pipx list
venvs are in /home/sgw/.local/pipx/venvs
apps are exposed on your $PATH at /home/sgw/.local/bin
   package ansible 2.9.2, Python 3.7.6
    - ansible
    - ansible-config
    - ansible-connection
    - ansible-console
    - ansible-doc
    - ansible-galaxy
    - ansible-inventory
    - ansible-playbook
    - ansible-pull
    - ansible-test
    - ansible-vault
   package debops 1.2.1, Python 3.7.6
    - debops
    - debops-defaults
    - debops-init
    - debops-padlock
    - debops-task
    - debops-update
   package docker 4.1.0, Python 3.7.6
    - chardetect
    - wsdump.py
   package molecule 2.22, Python 3.7.6
    - molecule

Molecule installation method (one of):

• pipx

Ansible installation method (one of):

• pipx

Detail any linters or test runners used:

Desired Behavior

molecule should correctly create/destroy/converge docker containers.
It does so if I use my old python venv, but not with the environment created with pipx.

Actual Behaviour

molecule --debug destroy
--> Validating schema /home/sgw/projects/github/xyx/molecule/default/molecule.yml.
Validation completed successfully.
--> Validating schema /home/sgw/projects/github/xyx/molecule/travis/molecule.yml.
Validation completed successfully.
--> Test matrix
    
└── default
    ├── dependency
    ├── cleanup
    └── destroy
    
--> Scenario: 'default'
--> Action: 'dependency'
Skipping, missing the requirements file.
--> Scenario: 'default'
--> Action: 'cleanup'
Skipping, cleanup playbook not configured.
--> Scenario: 'default'
--> Action: 'destroy'
--> Sanity checks: 'docker'
ERROR: Missing Docker driver dependency. Please install via 'molecule[docker]' or refer to your INSTALL.rst driver documentation file

[stefangweichinger]

Additional:

pipx https://github.com/pipxproject/pipx

was installed like recommended:

python3 -m pip install --user pipx
python3 -m pipx ensurepath

After that:

pipx install molecule
pipx install docker

[zeitounator]

You just made me discover pipx that I didn't know so thanks for that.

The problem is not with molecule but with your usage of pipx.

Very briefly reading your ticket and the doc. It looks like ansible runs in its own pipx venv which does not have the docker lib installed. There is a pipx inject command that will let you inject a package in an existing pipx venv. This is what you have to use. Note you may need this for other libraries like e.g. jmespath (if you use json_query)...

[stefangweichinger]

@zeitounator (oh, a climber pic .. climber here as well ;-) )

I tried some inject commands and now it seems to work.
I will start over to get a clean environment.

pipx list

does not list the injected packages, btw

But it seems OK now, thanks.
This makes using topgrade even more useful

[ssbarnea]

pipx is not a supported but if you make a PR that fixes your pipx issue without breaking anything else, I will be happy to review it.

[hswong3i]

Install Molecule could be done with pipx install and pipx inject, e.g.:

pipx install --include-deps flake8
pipx install --include-deps yamllint
pipx install --include-deps ansible
pipx inject --include-apps ansible ansible-lint
pipx inject --include-apps ansible molecule
pipx inject ansible docker
pipx inject ansible openshift
pipx inject ansible python-vagrant
pipx inject ansible netaddr
pipx inject ansible molecule-docker
pipx inject ansible molecule-podman
pipx inject ansible molecule-vagrant