Docker service deployment across multi-hosts

Setup

• Install Docker

  sudo apt install docker
  

• Run Docker without sudo

  sudo groupadd docker
  sudo usermod -aG $USER
  

• Configure VMs
  在virtualbox使多台ubuntu虚拟机位于同一局域网
  VirtualBox实现内外网络互访问的配置
  主机不能访问虚拟机中的web服务的解决方案

Deployment

• Create Cluster

  # on manager node
  docker swarm init
  

  # on worker node
  # run "docker swarm join-token manager" to get $token and $IP
  # run below command on slave/worker node to join swarm
  docker swarm join --token $token $IP:2377
  

• Create Network

  docker network create -d overlay <network>
  

• Create Service

  docker service create --name <svc_name> [--network <network>] --replicas <num> -p <port:target_port> <image>
  

• Rollout

  docker service update --replicas <num>
  

  docker service update --image <image:tag> <svc_name>
  

  docker service update --update-delay <secs> --update-parallelism <num>
  

• Inspection

  docker service inspect --pretty <svc_name>s
  

• Test

  curl docker:<port>