Add docs for running rootless Podman as a non-root user#50
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Document how to run the socket proxy as an unprivileged user (nobody, UID/GID 65534) under rootless Podman, in addition to the existing "docker user in a rootless environment" case where the container process still runs as root inside its namespace. Covers the two requirements needed for this to work: mapping the host user onto the in-container user via --userns=keep-id so the mounted Podman socket is readable. Also providing a writable tmpfs /run so the entrypoint can render the HAProxy config. Includes a podman run example, a Quadlet unit, and an SELinux note.
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Description:
Document how to run the socket proxy as an unprivileged user (nobody, UID/GID 65534) under rootless Podman, in addition to the existing "docker user in a rootless environment" case where the container process still runs as root inside its namespace.
Covers the two requirements needed for this to work: mapping the host user onto the in-container user via --userns=keep-id so the mounted Podman socket is readable. Also providing a writable tmpfs /run so the entrypoint can render the HAProxy config. Includes a podman run example, a Quadlet unit, and an SELinux note.
Benefits of this PR and context:
Urges users to use a non-root user inside the container. Also suppresses the HAProxy warning regarding this issue.
How Has This Been Tested?
Good working of endpoints with a non-root user.