Python项目容器化实践(二) - Docker Machine和Docker Swarm

# 管理节点
❯ docker-machine create -d virtualbox manager # 创建管理节点，名字为manager
❯ docker-machine ssh manager  # 登录到管理节点
docker@manager:~$ /sbin/ifconfig eth1 | grep 'inet addr' | cut -d: -f2 | awk '{print $1}'
192.168.99.104  # 获得IP
docker@manager:~$ docker swarm init --advertise-addr 192.168.99.104  # 在管理节点初始化一个Swarm集群，另外Docker主机有多个网卡，所以有多个IP，必须使用 --advertise-addr 指定IP
Swarm initialized: current node (k8cdrnrylrkxpsk4qoyybwpca) is now a manager.

To add a worker to this swarm, run the following command:

    docker swarm join --token SWMTKN-1-2gfzia6yrk172e8352jxpolevjr9gx1a9xu95hg0ibkhqat52p-d6j79273adew38s5mzmewgwoo 192.168.99.104:2377  # 记住这句命令

To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.
❯ docker-machine create -d virtualbox worker1 # 创建工作节点，名字worker1
❯ docker-machine ssh worker1
docker@worker1:~$ docker swarm join --token SWMTKN-1-2gfzia6yrk172e8352jxpolevjr9gx1a9xu95hg0ibkhqat52p-d6j79273adew38s5mzmewgwoo 192.168.99.104:2377  # 从上面直接粘贴来
This node joined a swarm as a worker.
❯ docker-machine create -d virtualbox worker2 # 创建工作节点，名字worker2
❯ docker-machine ssh worker2
docker@worker2:~$ docker swarm join --token SWMTKN-1-2gfzia6yrk172e8352jxpolevjr9gx1a9xu95hg0ibkhqat52p-d6j79273adew38s5mzmewgwoo 192.168.99.104:2377
This node joined a swarm as a worker.

❯ docker-machine ssh manager
docker@manager:~$ docker node ls
ID                            HOSTNAME            STATUS              AVAILABILITY        MANAGER STATUS      ENGINE VERSION
k8cdrnrylrkxpsk4qoyybwpca *   manager             Ready               Active              Leader              18.09.9
puzrum9ixbt6holgfk5d8aokl     worker1             Ready               Active                                  18.09.9
sqwpb00zh5fp9z2o6r7vnebbt     worker2             Ready               Active                                  18.09.9

docker@manager:~$ docker service create --replicas 3 -p 80:80 --name nginx nginx:1.17.4-alpine  # 创建服务，三个副本，服务监听在80端口
pydkv5ffwfqiv1aua1ylmwhum
overall progress: 3 out of 3 tasks
1/3: running   [==================================================>]
2/3: running   [==================================================>]
3/3: running   [==================================================>]
verify: Service converged
docker@manager:~$ docker service ls # 查看当前Swarm集群运行的服务
ID                  NAME                MODE                REPLICAS            IMAGE                 PORTS
pydkv5ffwfqi        nginx               replicated          3/3                 nginx:1.17.4-alpine   *:80->80/tcp
# 现在我们使用浏览器，输入任意节点IP(如管理节点的192.168.99.104)，都能看到nginx默认页面
docker@manager:~$ docker service logs nginx # 查看Nginx服务的日志
... # 省略输出
docker@manager:~$ docker service scale nginx=5 # 业务高峰期时，扩展服务运行的容器数量
nginx scaled to 5
overall progress: 5 out of 5 tasks
1/5: running   [==================================================>]
2/5: running   [==================================================>]
3/5: running   [==================================================>]
4/5: running   [==================================================>]
5/5: running   [==================================================>]
verify: Service converged
docker@manager:~$ docker service ps nginx # 查看服务详情
i6xkgnneqbbq        nginx.1             nginx:1.17.4-alpine   worker2             Running             Running 4 minutes ago
f517ogp705ne        nginx.2             nginx:1.17.4-alpine   manager             Running             Running 5 minutes ago
... # 省略输出
docker@manager:~$ docker service scale nginx=2 # 业务平稳期时，减少服务运行的容器数量

❯ eval "$(docker-machine env manager)"  # 本机切换到管理主机
❯ git clone https://github.com/dongweiming/lyanna  # 下载lyanna项目源码，如果原来已经clone了不用再做
❯ cd lyanna
❯ docker service create --name registry --publish published=5000,target=5000 registry:2  # 创建注册服务(名字叫registry)，启动在5000端口上
❯ docker-compose -f docker-compose.swarm.yml build  # 用Compose的方式启动，这个过程会构建lyanna-app镜像
❯ docker-compose -f docker-compose.swarm.yml push  # 把lyanna-app推送给本地的注册服务
❯ docker stack deploy -c docker-compose.swarm.yml lyanna # 部署服务
Ignoring unsupported options: build

Creating network lyanna_default
Creating service lyanna_web
Creating service lyanna_visualizer
Creating service lyanna_db
Creating service lyanna_redis
Creating service lyanna_memcached