Add dind_swarm setup and config.

dind_swarm.yml

+version: '3'
+
+services:
+  storage:
+    command: ["-p", "-s", "opaque_storage;/srv/opaque/storage;no;no;no;opaque", "-u", "opaque;opaque"]
+    image: dperson/samba:latest
+    ports:
+      - 139:139
+      - 445:445
+    restart: on-failure
+    volumes:
+      - /srv/opaque/storage:/srv/opaque/storage
+  worker:
+    image: docker:dind
+    ports:
+      - 2375
+    privileged: true
+    restart: on-failure
+    volumes:
+      - /mnt/opaque:/mnt/opaque
+  viz:
+    image: dockersamples/visualizer:latest
+    ports:
+      - 8080:8080
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock

setup_dind_swarm.sh

+#!/bin/bash
+
+OPAQUE_STORAGE_MOUNT_DIRECTORY="/mnt/opaque" # Don't change this variable, unless you know what you are doing!
+SWARM_MANAGER_IP=""
+SWARM_WORKER_NUMBER=4
+SWARM_WORKER_TOKEN=""
+
+if [ -z ${SWARM_MANAGER_IP} ]; then
+  # See https://stackoverflow.com/a/25851186
+  SWARM_MANAGER_IP=$(ip route get 1 | awk '{print $(NF-2);exit}')
+fi
+
+if [ -z ${SWARM_WORKER_TOKEN} ]; then
+  docker swarm leave --force > /dev/null 2>&1
+  docker swarm init --advertise-addr ${SWARM_MANAGER_IP} > /dev/null 2>&1
+  SWARM_WORKER_TOKEN=$(docker swarm join-token -q worker)
+fi
+
+docker-compose --file dind_swarm.yml up --detach storage
+sleep 3
+echo "Mounting network storage to host system..."
+sudo mkdir -p /mnt/opaque
+sudo mount -t cifs -o gid=${USER},password=opaque,uid=${USER},user=opaque,vers=3.0 //localhost/opaque_storage /mnt/opaque
+echo "Done"
+docker-compose --file dind_swarm.yml up --detach --scale worker=${SWARM_WORKER_NUMBER} worker
+sleep 10
+echo "Add workers to swarm"
+
+for i in $(seq 1 ${SWARM_WORKER_NUMBER}); do
+  docker-compose --file dind_swarm.yml exec --index=${i} worker docker swarm join --token ${SWARM_WORKER_TOKEN} ${SWARM_MANAGER_IP}:2377
+done
+
+
+docker-compose --file dind_swarm.yml up --detach viz