docker环境自行安装

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常用命令：

#管理swarm 
# docker swarm
Commands:
  init        Initialize a swarm   
  join        Join a swarm as a node and/or manager
  join-token  Manage join tokens
  leave       Leave the swarm
  unlock      Unlock swarm
  unlock-key  Manage the unlock key
  update      Update the swarm

 

#管理 node 节点
#docker node
Commands:
  demote      Demote one or more nodes from manager in the swarm
  inspect     Display detailed information on one or more nodes
  ls          List nodes in the swarm
  promote     Promote one or more nodes to manager in the swarm
  ps          List tasks running on one or more nodes, defaults to current node
  rm          Remove one or more nodes from the swarm
  update      Update a node

 

 

#管理service
#docker service
Commands:
  create      Create a new service
  inspect     Display detailed information on one or more services
  logs        Fetch the logs of a service or task
  ls          List services
  ps          List the tasks of one or more services
  rm          Remove one or more services
  scale       Scale one or multiple replicated services
  update      Update a service

 

 

#部署
#docker stack

Commands:
  deploy      Deploy a new stack or update an existing stack
  ls          List stacks
  ps          List the tasks in the stack
  rm          Remove one or more stacks
  services    List the services in the stack

 1.初始化master节点   docker swarm init   记住加入的token，然后再 节点上面加入集群，忘记token可以以下命令获取

  docker swarm join-token manager
  docker swarm join-token worker

2.测试实验

docker pull linuxserver/nginx
docker service create --name webapp-nginx --replicas 3 --publish 80:80 linuxserver/nginx


#收缩实例个数为1个
docker service scale webapp-nginx=1

#将master节点排除，不运行任务
docker node update --availability drain hostname


#滚动升级images
docker service update --image nginx webapp-nginx


#服务更新和回滚策略
docker service create \
--name webapp-nginx \
--replicas 3 \
--update-delay 10s \
--update-parallelism 2 \
--update-failure-action continue \
--rollback-parallelism 2 \
--rollback-monitor 20s \
--rollback-max-failure-ratio 0.2 \
nginx:1.12.1

# --update-parallelism 2  ： 每次允许两个服务一起更新
# --update-parallelism continue ： 更新失败后的动作是继续
# --rollback-parallelism 2  ：  回滚时允许两个一起
# --update-monitor 20s  ：回滚监控时间20s
# --update-max-failure-ratio 0.2 ： 回滚失败率20%


#手动设置一下
docker service update --rollback-max-failure-ratio 0.2 webapp-nginx


#手动回滚一下
##默认只能回滚到上一次操作的状态，并不能连续回滚到指定操作
docker service update --rollback webapp-nginx