在docker swarm模式下，通过docker-machine 创建docker集群实例（virtual box 驱动虚拟机）

docker-swarm-mode.sh

#!/bin/bash

# Swarm mode using Docker Machine

managers=3
workers=3

# 创建管理节点虚拟机
echo "======> Creating $managers manager machines ...";
for node in $(seq 1 $managers);
do
	echo "======> Creating manager$node machine ...";
	docker-machine create -d virtualbox manager$node;
done

# 创建工作节点虚拟机
echo "======> Creating $workers worker machines ...";
for node in $(seq 1 $workers);
do
	echo "======> Creating worker$node machine ...";
	docker-machine create -d virtualbox worker$node;
done

# 罗列创建好的节点
docker-machine ls

# 初始化第一个管理节点虚拟机为swarm模式
echo "======> Initializing first swarm manager ..."
docker-machine ssh manager1 "docker swarm init --listen-addr $(docker-machine ip manager1) --advertise-addr $(docker-machine ip manager1)"

# 分别获取管理节点和工作节点加入集群所需要的token
export manager_token=`docker-machine ssh manager1 "docker swarm join-token manager -q"`
export worker_token=`docker-machine ssh manager1 "docker swarm join-token worker -q"`

echo "manager_token: $manager_token"
echo "worker_token: $worker_token"

# 将另外两个管理节点加入当前集群
for node in $(seq 2 $managers);
do
	echo "======> manager$node joining swarm as manager ..."
	docker-machine ssh manager$node \
		"docker swarm join \
		--token $manager_token \
		--listen-addr $(docker-machine ip manager$node) \
		--advertise-addr $(docker-machine ip manager$node) \
		$(docker-machine ip manager1)"
done

# 查看现在集群内的节点信息
docker-machine ssh manager1 "docker node ls"

# 将所有的工作节点加入到集群
for node in $(seq 1 $workers);
do
	echo "======> worker$node joining swarm as worker ..."
	docker-machine ssh worker$node \
	"docker swarm join \
	--token $worker_token \
	--listen-addr $(docker-machine ip worker$node) \
	--advertise-addr $(docker-machine ip worker$node) \
	$(docker-machine ip manager1)"
done

# 查看现在集群内的节点信息
docker-machine ssh manager1 "docker node ls"