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# syntax=docker/dockerfile:1
# ENGINE_VERSION is the version of the (docker-in-docker) Docker Engine to
# test against.
ARG ENGINE_VERSION=26.1
FROM docker:${ENGINE_VERSION}-dind
# the openssh-client update is needed for security reasons when using docker:23.0-dind, currently maintained as an lts by mirantis
RUN apk --no-cache upgrade openssh-client && \
apk --no-cache add shadow openssh-server && \
# TODO(krissetto): `groupadd` can be removed once we only test against moby >= v24
# see https://github.com/docker-library/docker/pull/470
groupadd -f docker && \
useradd --create-home --shell /bin/sh --password $(head -c32 /dev/urandom | base64) penguin && \
usermod -aG docker penguin && \
ssh-keygen -A
# workaround: ssh session excludes /usr/local/bin from $PATH
RUN ln -s /usr/local/bin/docker /usr/bin/docker
COPY ./connhelper-ssh/entrypoint.sh /
EXPOSE 22
ENTRYPOINT ["/entrypoint.sh"]
# usage: docker run --privileged -e TEST_CONNHELPER_SSH_ID_RSA_PUB=$(cat ~/.ssh/id_rsa.pub) -p 22 $THIS_IMAGE
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