refactor(restore)!: restore volume files via direct host rsync

Drop the alpine-rsync helper image: resolve the volume mountpoint with
docker volume inspect and rsync the backup straight into it. Removes the
--rsync-image flag and the E2E_RSYNC_IMAGE pre-pull; the e2e test
container now mounts /var/lib/docker rw so the direct restore can write.

BREAKING CHANGE: the restore 'files' subcommand no longer accepts
--rsync-image; rsync must be available on the host running baudolo.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

scripts/test-e2e.sh

@@ -27,7 +27,6 @@ dind() { docker exec "${DIND}" docker "$@"; }
 dind_stdin() { docker exec -i "${DIND}" docker "$@"; }
 
 IMG="${E2E_IMAGE:-baudolo:local}"
-RSYNC_IMG="${E2E_RSYNC_IMAGE:-ghcr.io/kevinveenbirkenbach/alpine-rsync}"
 
 READY_TIMEOUT_SECONDS="${E2E_READY_TIMEOUT_SECONDS:-120}"
 ARTIFACTS_DIR="${E2E_ARTIFACTS_DIR:-./artifacts}"
@@ -164,10 +163,6 @@ for i in $(seq 1 "${READY_TIMEOUT_SECONDS}"); do
   fi
 done
 
-log "Pre-pulling helper images in DinD..."
-log " - Pulling: ${RSYNC_IMG}"
-dind pull "${RSYNC_IMG}"
-
 log "Ensuring alpine exists in DinD (for debug helpers)"
 dind pull alpine:3.20 >/dev/null
 
@@ -181,8 +176,7 @@ if [ "${DEBUG_SHELL}" = "1" ]; then
   docker run --rm -it \
     --network "${NET}" \
     -e DOCKER_HOST="${DIND_HOST_IN_NET}" \
-    -e E2E_RSYNC_IMAGE="${RSYNC_IMG}" \
-    -v "${DIND_VOL}:/var/lib/docker:ro" \
+    -v "${DIND_VOL}:/var/lib/docker" \
     -v "${E2E_TMP_VOL}:/tmp" \
     "${IMG}" \
     bash -lc '
@@ -200,8 +194,7 @@ else
   docker run --rm \
     --network "${NET}" \
     -e DOCKER_HOST="${DIND_HOST_IN_NET}" \
-    -e E2E_RSYNC_IMAGE="${RSYNC_IMG}" \
-    -v "${DIND_VOL}:/var/lib/docker:ro" \
+    -v "${DIND_VOL}:/var/lib/docker" \
     -v "${E2E_TMP_VOL}:/tmp" \
     "${IMG}" \
     bash -lc '

src/baudolo/restore/__main__.py

@@ -38,10 +38,6 @@ def main(argv: list[str] | None = None) -> int:
     # ------------------------------------------------------------------
     p_files = sub.add_parser("files", help="Restore files into a docker volume")
     _add_common_backup_args(p_files)
-    p_files.add_argument(
-        "--rsync-image",
-        default="ghcr.io/kevinveenbirkenbach/alpine-rsync",
-    )
     p_files.add_argument(
         "--source-volume",
         default=None,
@@ -95,7 +91,6 @@ def main(argv: list[str] | None = None) -> int:
             return restore_volume_files(
                 args.volume_name,
                 bp_files.files_dir(),
-                rsync_image=args.rsync_image,
             )
 
         if args.cmd == "postgres":

src/baudolo/restore/files.py

@@ -3,12 +3,10 @@ from __future__ import annotations
 import os
 import sys
 
-from .run import run, docker_volume_exists
+from .run import docker_volume_exists, run
 
 
-def restore_volume_files(
-    volume_name: str, backup_files_dir: str, *, rsync_image: str
-) -> int:
+def restore_volume_files(volume_name: str, backup_files_dir: str) -> int:
     if not os.path.isdir(backup_files_dir):
         print(f"ERROR: backup files dir not found: {backup_files_dir}", file=sys.stderr)
         return 2
@@ -19,21 +17,21 @@ def restore_volume_files(
     else:
         print(f"Volume {volume_name} already exists.")
 
-    # Keep behavior close to the old script: rsync -avv --delete
-    run(
-        [
-            "docker",
-            "run",
-            "--rm",
-            "-v",
-            f"{volume_name}:/recover/",
-            "-v",
-            f"{backup_files_dir}:/backup/",
-            rsync_image,
-            "sh",
-            "-lc",
-            "rsync -avv --delete /backup/ /recover/",
-        ]
+    cp = run(
+        ["docker", "volume", "inspect", "--format", "{{ .Mountpoint }}", volume_name],
+        capture=True,
     )
+    raw = cp.stdout or b""
+    mountpoint = (raw.decode() if isinstance(raw, bytes) else raw).strip()
+    if not mountpoint:
+        print(
+            f"ERROR: could not resolve mountpoint for volume {volume_name}",
+            file=sys.stderr,
+        )
+        return 2
+
+    src = os.path.join(backup_files_dir, "")
+    dest = os.path.join(mountpoint, "")
+    run(["rsync", "-avv", "--delete", src, dest])
     print("File restore complete.")
     return 0