float-podman-runner

This container image is meant for testing other container images (usually built via Gitlab CI) in a setup that mirrors what is used by float, i.e. a root-less, read-only Podman environment.

The image itself is based on the official Podman stable image, and it includes a wrapper script called with-container, that will start a test container and then run a test script.

It can be used in your .gitlab-ci.yml file like this:

- container_test:
    stage: test
    image: registry.git.autistici.org/ai3/docker/test/float-like-podman:master
    script:
      - with-container $IMAGE_TAG ./my-test-script.sh

The wrapper accepts Podman options, to customize the environment (like --env or --mount) in order for the test to run properly. Note that these options must be specified before the IMAGE_TAG, and must follow the --VAR=VALUE syntax strictly (each must be a single argument to with-container in order to be parsed correctly). E.g.:

with-container --env=FOO=bar --mount=type=bind,source=config.txt,destination=config.txt my-image ./test.sh

Test script interface

The with-container wrapper takes care of running the test script multiple times in case of transient errors, so you don't have to add retry logic to your test script.

To distinguish permanent and transient errors, with-container looks at the test script exit status code:

• 0: success
• 1: transient failure, retry
• anything else: permanent failure

netcat-expect

An additional little tool is provided that can run request/response matches against a target TCP server (using netcat). For each test, create a directory with files named request and response that should match the expected interaction, and run (e.g. with respect to the above Gitlab CI example):

    script:
      - with-container $IMAGE_TAG netcat-expect testdata/ping localhost 8080