diff --git a/dask/README.md b/dask/README.md
index 18c7cce..3a3afe0 100644
--- a/dask/README.md
+++ b/dask/README.md
@@ -3,6 +3,8 @@ dask
 
 [Dask][1] is a flexible library for parallel computing in Python.
 
+## up and running
+
 ```bash
 $ mkdir -p data/{jupyter,work}
 $ chown -R 1000:100 data
@@ -11,4 +13,18 @@ $ docker-compose logs -f notebook
 $ curl http://127.0.0.1:8888
 ```
 
+## make it public
+
+```bash
+$ docker exec -it xxxxxx bash
+>>> jupyter notebook password
+Enter password:  ****
+Verify password: ****
+[NotebookPasswordApp] Wrote hashed password to ~/.jupyter/jupyter_notebook_config.json
+
+$ docker service update --force dask_notebook
+```
+
+- <https://jupyter-notebook.readthedocs.io/en/stable/public_server.html>
+
 [1]: https://docs.dask.org/en/latest/
diff --git a/dask/docker-compose.yml b/dask/docker-compose.yml
index 427cb94..ebd57dd 100644
--- a/dask/docker-compose.yml
+++ b/dask/docker-compose.yml
@@ -1,4 +1,4 @@
-version: "3.7"
+version: "3.8"
 
 services:
 
@@ -10,13 +10,6 @@ services:
       - "8787:8787"
     restart: unless-stopped
 
-  worker:
-    image: daskdev/dask
-    command: ["dask-worker", "tcp://scheduler:8786"]
-    depends_on:
-      - scheduler
-    restart: unless-stopped
-
   notebook:
     image: daskdev/dask-notebook
     ports:
@@ -31,3 +24,10 @@ services:
     depends_on:
       - scheduler
     restart: unless-stopped
+
+  worker:
+    image: daskdev/dask
+    command: ["dask-worker", "tcp://scheduler:8786"]
+    depends_on:
+      - scheduler
+    restart: unless-stopped
diff --git a/dask/docker-stack.yml b/dask/docker-stack.yml
new file mode 100644
index 0000000..35f8bc3
--- /dev/null
+++ b/dask/docker-stack.yml
@@ -0,0 +1,52 @@
+version: "3.8"
+
+services:
+
+  scheduler:
+    image: daskdev/dask
+    command: ["dask-scheduler"]
+    ports:
+      - "8786:8786"
+      - "8787:8787"
+    deploy:
+      replicas: 1
+      placement:
+        constraints:
+          - node.role == manager
+      restart_policy:
+        condition: on-failure
+
+  notebook:
+    image: daskdev/dask-notebook
+    ports:
+      - "8888:8888"
+    volumes:
+      - /home/presto/fig/dask/data/jupyter:/home/jovyan/.jupyter
+      - /home/presto/fig/dask/data/work:/home/jovyan/work
+      - /opt/conda/lib/python3.7/site-packages
+    environment:
+      - DASK_SCHEDULER_ADDRESS=tcp://scheduler:8786
+      - EXTRA_PIP_PACKAGES=dateparser parsel
+    depends_on:
+      - scheduler
+    deploy:
+      replicas: 1
+      placement:
+        constraints:
+          - node.role == manager
+      restart_policy:
+        condition: on-failure
+
+  worker:
+    image: daskdev/dask
+    command: ["dask-worker", "tcp://scheduler:8786"]
+    depends_on:
+      - scheduler
+    deploy:
+      replicas: 2
+      placement:
+        max_replicas_per_node: 1
+        constraints:
+          - node.role == worker
+      restart_policy:
+        condition: on-failure
diff --git a/polipo/README.md b/polipo/README.md
index a793bac..39879cd 100644
--- a/polipo/README.md
+++ b/polipo/README.md
@@ -9,14 +9,16 @@ group.
 ## docker-compose.yml
 
 ```yaml
-polipo:
-  image: vimagick/polipo
-  command:
-    authCredentials=username:password
-    socksParentProxy=1.2.3.4:9050
-  ports:
-    - "8123:8123"
-  restart: always
+version: "3.8"
+services:
+  polipo:
+    image: vimagick/polipo
+    command:
+      authCredentials=username:password
+      socksParentProxy=1.2.3.4:9050
+    ports:
+      - "8123:8123"
+    restart: unless-stopped
 ```
 
 ## server
diff --git a/polipo/docker-compose.yml b/polipo/docker-compose.yml
index 8953652..a8afa28 100644
--- a/polipo/docker-compose.yml
+++ b/polipo/docker-compose.yml
@@ -1,8 +1,10 @@
-polipo:
-  image: vimagick/polipo
-  command:
-    authCredentials=username:password
-    socksParentProxy=1.2.3.4:9050
-  ports:
-    - "8123:8123"
-  restart: always
+version: "3.8"
+services:
+  polipo:
+    image: vimagick/polipo
+    command:
+      authCredentials=username:password
+      socksParentProxy=1.2.3.4:9050
+    ports:
+      - "8123:8123"
+    restart: unless-stopped
diff --git a/polipo/docker-stack.yml b/polipo/docker-stack.yml
new file mode 100644
index 0000000..7af5cfb
--- /dev/null
+++ b/polipo/docker-stack.yml
@@ -0,0 +1,20 @@
+version: "3.8"
+
+services:
+
+  polipo:
+    image: vimagick/polipo
+    networks:
+      - host_network
+    deploy:
+      mode: global
+      placement:
+        constraints:
+          - node.role == worker
+      restart_policy:
+        condition: on-failure
+
+networks:
+  host_network:
+    external: true
+    name: host