Could not connect to docker daemon when running on k8s action runner

[omri-shilton]

Describe the bug When running on self-hosted runner on kubernetes cluster im getting the following error. My runners are working propely and i've managed to build docker in docker on them fine.

Run jupyterhub/repo2docker-action@master
/usr/local/bin/docker run --name e2260c69769d954248a783072ff35e7ea6fe_c6ad0e --label 60e226 --workdir /github/workspace --rm -e "IMAGE_NAME" -e "REGISTRY" -e "INPUT_LATEST_TAG_OFF" -e "INPUT_IMAGE_NAME" -e "INPUT_DOCKER_REGISTRY" -e "INPUT_ADDITIONAL_TAG" -e "INPUT_DOCKER_USERNAME" -e "INPUT_DOCKER_PASSWORD" -e "INPUT_REPO2DOCKER_EXTRA_ARGS" -e "INPUT_NOTEBOOK_USER" -e "INPUT_REPO_DIR" -e "INPUT_APPENDIX_FILE" -e "INPUT_NO_PUSH" -e "INPUT_BINDER_CACHE" -e "INPUT_COMMIT_MSG" -e "INPUT_MYBINDERORG_TAG" -e "INPUT_PUBLIC_REGISTRY_CHECK" -e "INPUT_NO_GIT_PUSH" -e "INPUT_FORCE_REPO2DOCKER_VERSION" -e "INPUT_EXTRA_PIP_INSTALL" -e "HOME" -e "GITHUB_JOB" -e "GITHUB_REF" -e "GITHUB_SHA" -e "GITHUB_REPOSITORY" -e "GITHUB_REPOSITORY_OWNER" -e "GITHUB_REPOSITORY_OWNER_ID" -e "GITHUB_RUN_ID" -e "GITHUB_RUN_NUMBER" -e "GITHUB_RETENTION_DAYS" -e "GITHUB_RUN_ATTEMPT" -e "GITHUB_REPOSITORY_ID" -e "GITHUB_ACTOR_ID" -e "GITHUB_ACTOR" -e "GITHUB_TRIGGERING_ACTOR" -e "GITHUB_WORKFLOW" -e "GITHUB_HEAD_REF" -e "GITHUB_BASE_REF" -e "GITHUB_EVENT_NAME" -e "GITHUB_SERVER_URL" -e "GITHUB_API_URL" -e "GITHUB_GRAPHQL_URL" -e "GITHUB_REF_NAME" -e "GITHUB_REF_PROTECTED" -e "GITHUB_REF_TYPE" -e "GITHUB_WORKFLOW_REF" -e "GITHUB_WORKFLOW_SHA" -e "GITHUB_WORKSPACE" -e "GITHUB_EVENT_PATH" -e "GITHUB_PATH" -e "GITHUB_ENV" -e "GITHUB_STEP_SUMMARY" -e "GITHUB_STATE" -e "GITHUB_OUTPUT" -e "GITHUB_ACTION" -e "GITHUB_ACTION_REPOSITORY" -e "GITHUB_ACTION_REF" -e "RUNNER_OS" -e "RUNNER_ARCH" -e "RUNNER_NAME" -e "RUNNER_TOOL_CACHE" -e "RUNNER_TEMP" -e "RUNNER_WORKSPACE" -e "ACTIONS_RUNTIME_URL" -e "ACTIONS_RUNTIME_TOKEN" -e "ACTIONS_CACHE_URL" -e GITHUB_ACTIONS=true -e CI=true -v "/var/run/docker.sock":"/var/run/docker.sock" -v "/runner/_work/_temp/_github_home":"/github/home" -v "/runner/_work/_temp/_github_workflow":"/github/workflow" -v "/runner/_work/_temp/_runner_file_commands":"/github/file_commands" -v "/runner/_work/armoz/armoz":"/github/workspace" 60e226:0c69769d954248a783072ff35e7ea6fe
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Build armoz.azurecr.io/jupyter/notebook:2fab9c0d34e7
  
  Container engine initialization error: ('Check if docker is running on the host.', DockerException("Error while fetching server API version: ('Connection aborted.', ConnectionRefusedError(111, 'Connection refused'))"))

When I swap to the github runners everything works correctly.

Expected behavior Working and building the repo image

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