fix: properly set JuiceFS mount binary path with channel suffix

Refactored the mount binary installation to explicitly place files at the
expected locations with correct channel suffixes (.stable or .beta). This
prevents the Python wrapper from attempting to download non-existent files
for arm64 architecture.

- Explicitly copy mount binaries to /usr/local/juicefs/mount/jfsmount.{stable,beta}
- Ensure both amd64 and arm64 architectures use the same naming convention
- Fix the auto-download attempt that was failing with 404 errors

Author: elijah-rou

docker/csi.Dockerfile

@@ -82,11 +82,26 @@ RUN apt-get update && apt-get install -y curl fuse procps iputils-ping strace ip
   mkdir /root/.acl && cp /etc/passwd /root/.acl/passwd && cp /etc/group /root/.acl/group && \
   ln -sf /root/.acl/passwd /etc/passwd && ln -sf /root/.acl/group  /etc/group
 
-RUN jfs_mount_path=${JFS_MOUNT_PATH} && \
-  bash -c "if [[ '${JFSCHAN}' == beta ]]; then curl -sSL https://static.juicefs.com/release/bin_pkgs/beta_full.tar.gz | tar -xz; jfs_mount_path=${JFS_MOUNT_PATH}.beta; \
-  else curl -sSL https://static.juicefs.com/release/bin_pkgs/latest_stable_full.tar.gz | tar -xz; jfs_mount_path=${JFS_MOUNT_PATH}.stable; fi;" && \
-  bash -c "mkdir -p /usr/local/juicefs/mount; if [[ '${TARGETARCH}' == amd64 ]]; then cp Linux/mount.ceph $jfs_mount_path; else cp Linux/mount.aarch64 $jfs_mount_path; fi;" && \
-  chmod +x ${jfs_mount_path} && cp juicefs.py ${JUICEFS_CLI} && chmod +x ${JUICEFS_CLI}
+RUN bash -c "if [[ '${JFSCHAN}' == beta ]]; then \
+    curl -sSL https://static.juicefs.com/release/bin_pkgs/beta_full.tar.gz | tar -xz; \
+    mkdir -p /usr/local/juicefs/mount; \
+    if [[ '${TARGETARCH}' == amd64 ]]; then \
+      cp Linux/mount.ceph /usr/local/juicefs/mount/jfsmount.beta; \
+    else \
+      cp Linux/mount.aarch64 /usr/local/juicefs/mount/jfsmount.beta; \
+    fi; \
+    chmod +x /usr/local/juicefs/mount/jfsmount.beta; \
+  else \
+    curl -sSL https://static.juicefs.com/release/bin_pkgs/latest_stable_full.tar.gz | tar -xz; \
+    mkdir -p /usr/local/juicefs/mount; \
+    if [[ '${TARGETARCH}' == amd64 ]]; then \
+      cp Linux/mount.ceph /usr/local/juicefs/mount/jfsmount.stable; \
+    else \
+      cp Linux/mount.aarch64 /usr/local/juicefs/mount/jfsmount.stable; \
+    fi; \
+    chmod +x /usr/local/juicefs/mount/jfsmount.stable; \
+  fi" && \
+  cp juicefs.py ${JUICEFS_CLI} && chmod +x ${JUICEFS_CLI}
 
 COPY --from=csi-builder /workspace/bin/juicefs-csi-driver /usr/local/bin/
 COPY --from=juicefs-builder /workspace/juicefs/juicefs /usr/local/bin/