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Giuseppe Scrivano
d51a653f9c
* refactor(driver): extract shared supervisor binary helpers Move supervisor binary extraction, caching, and validation helpers from the Docker driver into openshell-core::driver_utils so both Docker and Podman drivers can reuse them. Moved helpers: extract_first_tar_entry, write_cache_binary_atomic, supervisor_cache_path, temp_extract_container_name, and validate_linux_elf_binary. The shared extract_first_tar_entry gains entry-type and empty-payload checks that the Docker-local version lacked. supervisor_cache_path takes a driver_subdir parameter so each driver caches under its own namespace (docker-supervisor vs podman-supervisor). Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> * feat(driver-podman): add userns config Add a `userns` option to the Podman compute driver that maps to Podman's user namespace modes. The mode string is split on the first colon into the API's `nsmode` and `value` fields so parameterized values like `auto:size=65536` and `keep-id:uid=1000,gid=1000` are forwarded correctly. When the mode is `auto`, the container spec also sets `idmappings.AutoUserNs = true` as required by the API. An allowlist validates the mode at startup: `auto` and `keep-id` accept optional parameters; `host`, `private`, and `nomap` reject them; everything else is an error. Podman image volumes use overlay mounts internally and the kernel does not support idmapped mounts on overlay (`mount_setattr` returns EINVAL). When userns is configured (any mode except `host`), the driver extracts the supervisor binary from the image to a host-side cache and bind-mounts it instead of using an image volume. Configurable via TOML `userns = "auto"`, CLI `--userns`, or environment variable `OPENSHELL_PODMAN_USERNS`. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> --------- Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>