Failed to find docker host.

[dennym]

> TestContainer.start_link()
** (EXIT from #PID<0.1118.0>) shell process exited with reason: "Failed to find docker host: [testcontainer_host_from_properties: {:property_not_found, \"tc.host\"}], [testcontainer_host_from_properties: {:property_not_found, \"docker.host\"}], [docker_host_from_env: {:chec
kout_failure, \"DOCKER_HOST\"}], {:docker_socket_not_found, [\"/var/run/docker.sock\", \"/home/denym/.docker/run/docker.sock\", \"/home/denym/.docker/desktop/docker.sock\", \"/run/user/1000//podman/podman.sock\", \"/run/user/1000//docker.sock\"]}"

I tried running multiple ways and I have docker and podman available. The socks are running under /var/usr/docker.sock and /var/usr/podman/podman.sock.

DOCKER_HOST=unix:///var/run/podman/podman.sock iex -S mix phx.server
DOCKER_HOST=unix:///var/run/docker.sock iex -S mix phx.server

Its seems like the variable is not respected. Also exporting it beforehand does not result in any different behavior.
Reading the tests ... I also tried X_DOCKER_HOST which I can't comprehend why its that var but also won't work,

X_DOCKER_HOST=unix:///var/run/podman/podman.sock iex -S mix phx.server
X_DOCKER_HOST=unix:///var/run/docker.sock iex -S mix phx.server

I also tried creating ~/.testcontainers.properties with docker.host=unix:///var/run/docker.sock but this file also seems not to be respected.

Any ideas or suggestion how to go from here?

[jarlah]

it can be tricky. But i know it works. I use podman at work, and we need to start podman in user mode or something. See testcontainers documentation for podman. https://podman-desktop.io/tutorial/testcontainers-with-podman