serve/docker: build docker plugin for multiple platforms #5668

Fixes #5462

Co-authored-by: Ivan Andreev <ivandeex@gmail.com>

contrib/docker-plugin/managed/Dockerfile

@@ -0,0 +1,25 @@
+ARG BASE_IMAGE=rclone/rclone:latest
+FROM ${BASE_IMAGE} as binaries
+
+# build plugin image
+FROM alpine:latest
+
+# put rclone in /usr/bin, reserve /usr/local/bin for plugin wrappers
+COPY --from=binaries /usr/local/bin/rclone /usr/bin/rclone
+
+RUN mkdir -p /data/config /data/cache /mnt \
+ && apk --no-cache add ca-certificates fuse tzdata \
+ && echo "user_allow_other" >> /etc/fuse.conf \
+ && rclone version
+
+ENV RCLONE_CONFIG=/data/config/rclone.conf
+ENV RCLONE_CACHE_DIR=/data/cache
+ENV RCLONE_BASE_DIR=/mnt
+ENV RCLONE_VERBOSE=0
+
+ENV HTTP_PROXY=
+ENV HTTPS_PROXY=
+ENV NO_PROXY=
+
+WORKDIR /data
+ENTRYPOINT ["rclone", "serve", "docker"]

contrib/docker-plugin/managed/config.json

@@ -0,0 +1,81 @@
+{
+    "description": "Rclone volume plugin for Docker",
+    "documentation": "https://rclone.org/docker",
+    "interface": {
+        "socket": "rclone.sock",
+        "types": ["docker.volumedriver/1.0"]
+    },
+    "linux": {
+        "capabilities": [
+            "CAP_SYS_ADMIN"
+        ],
+        "devices": [
+            {
+                "path": "/dev/fuse"
+            }
+        ]
+    },
+    "network": {
+        "type": "host"
+    },
+    "entrypoint": ["rclone", "serve", "docker"],
+    "workdir": "/data",
+    "args": {
+        "name": "args",
+        "value": [],
+        "settable": ["value"]
+    },
+    "env": [
+        {
+            "name": "RCLONE_VERBOSE",
+            "value": "0",
+            "settable": ["value"]
+        },
+        {
+            "name": "RCLONE_CONFIG",
+            "value": "/data/config/rclone.conf"
+        },
+        {
+            "name": "RCLONE_CACHE_DIR",
+            "value": "/data/cache"
+        },
+        {
+            "name": "RCLONE_BASE_DIR",
+            "value": "/mnt"
+        },
+        {
+            "name": "HTTP_PROXY",
+            "value": "",
+            "settable": ["value"]
+        },
+        {
+            "name": "HTTPS_PROXY",
+            "value": "",
+            "settable": ["value"]
+        },
+        {
+            "name": "NO_PROXY",
+            "value": "",
+            "settable": ["value"]
+        }
+    ],
+    "mounts": [
+        {
+            "name": "config",
+            "source": "/var/lib/docker-plugins/rclone/config",
+            "destination": "/data/config",
+            "type": "bind",
+            "options": ["rbind"],
+            "settable": ["source"]
+        },
+        {
+            "name": "cache",
+            "source": "/var/lib/docker-plugins/rclone/cache",
+            "destination": "/data/cache",
+            "type": "bind",
+            "options": ["rbind"],
+            "settable": ["source"]
+        }
+    ],
+    "propagatedMount": "/mnt"
+}

contrib/docker-plugin/systemd/docker-volume-rclone.service

@@ -0,0 +1,19 @@
+[Unit]
+Description=Docker Volume Plugin for rclone
+Requires=docker.service
+Before=docker.service
+After=network.target
+Requires=docker-volume-rclone.socket
+After=docker-volume-rclone.socket
+
+[Service]
+ExecStart=/usr/bin/rclone serve docker
+ExecStartPre=/bin/mkdir -p /var/lib/docker-volumes/rclone
+ExecStartPre=/bin/mkdir -p /var/lib/docker-plugins/rclone/config
+ExecStartPre=/bin/mkdir -p /var/lib/docker-plugins/rclone/cache
+Environment=RCLONE_CONFIG=/var/lib/docker-plugins/rclone/config/rclone.conf
+Environment=RCLONE_CACHE_DIR=/var/lib/docker-plugins/rclone/cache
+Environment=RCLONE_VERBOSE=1
+
+[Install]
+WantedBy=multi-user.target

contrib/docker-plugin/systemd/docker-volume-rclone.socket

@@ -0,0 +1,8 @@
+[Unit]
+Description=Docker Volume Plugin for rclone
+
+[Socket]
+ListenStream=/run/docker/plugins/rclone.sock
+
+[Install]
+WantedBy=sockets.target