部署多 service 应用

如何像docker-compose一样部署多服务应用，这一节我们先看手动的方式

本节课所用的源码文件 https://github.com/xiaopeng163/flask-redis

创建一个mynet的overlay网络

  1. vagrant@swarm-manager:~$ docker network ls
  2. NETWORK ID     NAME              DRIVER    SCOPE
  3. afc8f54c1d07   bridge            bridge    local
  4. 128fd1cb0fae   docker_gwbridge   bridge    local
  5. 0ea68b0d28b9   host              host      local
  6. 14fy2l7a4mci   ingress           overlay   swarm
  7. lpirdge00y3j   mynet             overlay   swarm
  8. a8edf1804fb6   none              null      local
  9. vagrant@swarm-manager:~$

创建一个redis的service

  1. vagrant@swarm-manager:~$ docker service create --network mynet --name redis redis:latest redis-server --requirepass ABC123
  2. qh3nfeth3wc7uoz9ozvzta5ea
  3. overall progress: 1 out of 1 tasks
  4. 1/1: running   [==================================================>]
  5. verify: Service converged
  6. vagrant@swarm-manager:~$ docker servce ls
  7. docker: 'servce' is not a docker command.
  8. See 'docker --help'
  9. vagrant@swarm-manager:~$ docker service ls
  10. ID             NAME      MODE         REPLICAS   IMAGE          PORTS
  11. qh3nfeth3wc7   redis     replicated   1/1        redis:latest
  12. vagrant@swarm-manager:~$ docker service ps redis
  13. ID             NAME      IMAGE          NODE            DESIRED STATE   CURRENT STATE            ERROR     PORTS
  14. 111cpkjn4a0k   redis.1   redis:latest   swarm-worker2   Running         Running 19 seconds ago
  15. vagrant@swarm-manager:~$

创建一个flask的service

  1. vagrant@swarm-manager:~$ docker service create --network mynet --name flask --env REDIS_HOST=redis --env REDIS_PASS=ABC123 -p 8080
  2. :5000 xiaopeng163/flask-redis:latest
  3. y7garhvlxah592j5lmqv8a3xj
  4. overall progress: 1 out of 1 tasks
  5. 1/1: running   [==================================================>]
  6. verify: Service converged
  7. vagrant@swarm-manager:~$ docker service ls
  8. ID             NAME      MODE         REPLICAS   IMAGE                            PORTS
  9. y7garhvlxah5   flask     replicated   1/1        xiaopeng163/flask-redis:latest   *:8080->5000/tcp
  10. qh3nfeth3wc7   redis     replicated   1/1        redis:latest
  11. vagrant@swarm-manager:~$ docker service ps flask
  12. ID             NAME      IMAGE                            NODE            DESIRED STATE   CURRENT STATE            ERROR     PORTS
  13. quptcq7vb48w   flask.1   xiaopeng163/flask-redis:latest   swarm-worker1   Running         Running 15 seconds ago
  14. vagrant@swarm-manager:~$ curl 127.0.0.1:8080
  15. Hello Container World! I have been seen 1 times and my hostname is d4de54036614.
  16. vagrant@swarm-manager:~$ curl 127.0.0.1:8080
  17. Hello Container World! I have been seen 2 times and my hostname is d4de54036614.
  18. vagrant@swarm-manager:~$ curl 127.0.0.1:8080
  19. Hello Container World! I have been seen 3 times and my hostname is d4de54036614.
  20. vagrant@swarm-manager:~$ curl 127.0.0.1:8080
  21. Hello Container World! I have been seen 4 times and my hostname is d4de54036614.
  22. vagrant@swarm-manager:~$