如果你想增加实例数，只需要在docker-compose.yml中修改replicas的数量，然后直接运行docker stack deploy -c docker-compose.yml getstartedlab即可，不需要摧毁stack和容器。
关闭应用和swarm # Take the app down with docker stack rm: docker stack rm getstartedlab # Take down the swarm. docker-machine ssh myvm2 "docker swarm leave" docker-machine ssh myvm1 "docker swarm leave --force" 离开集群主机shell eval $(docker-machine env -u) 重启Docker Machine > $ docker-machine ls NAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORS myvm1 - virtualbox Stopped Unknown myvm2 - virtualbox Stopped Unknown > $ docker-machine start myvm1 Starting "myvm1"... (myvm1) Check network to re-create if needed... (myvm1) Waiting for an IP... Machine "myvm1" was started. Waiting for SSH to be available... Detecting the provisioner... Started machines may have new IP addresses. You may need to re-run the `docker-machine env` command. > $ docker-machine start myvm2 Starting "myvm2"... (myvm2) Check network to re-create if needed... (myvm2) Waiting for an IP... Machine "myvm2" was started. Waiting for SSH to be available... Detecting the provisioner... Started machines may have new IP addresses. You may need to re-run the `docker-machine env` command. GUI图形界面管理使用visualizer或者portainer镜像来启动GUI图形界面服务，这里使用portainer
更改docker-compose.yml文件
version: "3" services: web: image: rynxiao/get-started:service deploy: replicas: 5 resources: limits: cpus: "0.1" memory: 50M restart_policy: condition: on-failure ports: - "80:80" networks: - webnet portainer: image: portainer/portainer ports: - "9000:9000" volumes: - "//var/run/docker.sock:/var/run/docker.sock" deploy: replicas: 1 placement: constraints: [node.role == manager] networks: webnet: