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Running Molecule tests locally

Prerequisites

  • Docker
  • Python 3.11

Create & activate Python virtual environment by running following commands

python3 -m venv ./venv
source ./venv/bin/activate
pip install -r requirements-test.txt

Bind Molecule to your Docker daemon socket by running e.g (optional)

export DOCKER_HOST=unix:///var/run/docker.sock

Now you should be able to run Molecule commands

# Prepare test instance
molecule create

# Run default scenario (apply role) on test instance
molecule converge

# Run verifications on applied role
molecule verify

# Stop & remove test instance
molecule destroy

# Run full test cycle for specified host & clickhouse versions
DISTRO_NAME=debian DISTRO_VER=12 CLICKHOUSE_VER=23.10.6.60 molecule test

# Use ANSIBLE_VERBOSITY to increase ansible output verbosity
ANSIBLE_VERBOSITY=3 molecule test

Note about gcloud helper for docker

If you are using gcloud helper, then you may need to fix $CLOUDSDK_PYTHON:

$ echo $CLOUDSDK_PYTHON
/usr/bin/python
# If you have absolute path, like above, then you need to replace it with relative:
$ export CLOUDSDK_PYTHON=python

Otherwise system-wide python interpreter may not work:

$ echo "gcr.io" | /opt/google-cloud-cli/bin/docker-credential-gcloud get
ERROR: gcloud crashed (AttributeError): module 'google._upb._message' has no attribute 'MessageMapContainer'