docker-compose只能在单机上使用，而stack则是swarm版本的docker-compose，二者均能使用docker-compose.yaml文件部署应用。

dockerstack常用命令

  1. [vagrant@swarm-manager flask-redis]$ docker stack
  2. Usage:  docker stack [OPTIONS] COMMAND
  3. Manage Docker stacks
  4. Options:
  5.       --orchestrator string   Orchestrator to use (swarm|kubernetes|all)
  6. Commands:
  7.   deploy      Deploy a new stack or update an existing stack
  8.   ls          List stacks
  9.   ps          List the tasks in the stack
  10.   rm          Remove one or more stacks
  11.   services    List the services in the stack
  12. Run 'docker stack COMMAND --help' for more information on a command.

swarm stack 部署多 service 应用

先在swarm manager节点上安装一下 docker-compose

  1. vagrant@swarm-manager:~$ sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
  2. vagrant@swarm-manager:~$ sudo chmod +x /usr/local/bin/docker-compose

国内源地址： $ sudo curl -L [https://get.daocloud.io/docker/compose/releases/download/1.29.2/docker-compose-$(uname](https://get.daocloud.io/docker/compose/releases/download/1.29.2/docker-compose-$(uname) -s)-$(uname -m) -o /usr/local/bin/docker-compose

clone我们的代码仓库

  1. vagrant@swarm-manager:~$ git clone https://github.com/insaneloafer/flask-redis
  2. Cloning into 'flask-redis'...
  3. remote: Enumerating objects: 22, done.
  4. remote: Counting objects: 100% (22/22), done.
  5. remote: Compressing objects: 100% (19/19), done.
  6. remote: Total 22 (delta 9), reused 7 (delta 2), pack-reused 0
  7. Unpacking objects: 100% (22/22), 8.60 KiB | 1.07 MiB/s, done.
  8. vagrant@swarm-manager:~$ cd flask-redis
  9. vagrant@swarm-manager:~/flask-redis$ ls
  10. Dockerfile  LICENSE  README.md  app.py  docker-compose.yml
  11. vagrant@swarm-manager:~/flask-redis$

环境清理

  1. vagrant@swarm-manager:~/flask-redis$ docker system prune -a -f

镜像构建和提交， 如果你想做这一步，可以把docker-compose.yml里的 xiaopeng163/flask-redis 改成你的dockerhub id

  1. vagrant@swarm-manager:~/flask-redis$ docker-compose build
  2. vagrant@swarm-manager:~/flask-redis$ docker image ls
  3. REPOSITORY                TAG          IMAGE ID       CREATED         SIZE
  4. insaneloafer/flask-redis   latest       5efb4fcbcfc3   6 seconds ago   126MB
  5. python                    3.9.5-slim   c71955050276   3 weeks ago     115MB

提交镜像到dockerhub

  1. vagrant@swarm-manager:~/flask-redis$ docker login
  2. Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
  3. Username: insaneloafer
  4. Password:
  5. WARNING! Your password will be stored unencrypted in /home/vagrant/.docker/config.json.
  6. Configure a credential helper to remove this warning. See
  7. https://docs.docker.com/engine/reference/commandline/login/#credentials-store
  8. Login Succeeded
  9. vagrant@swarm-manager:~/flask-redis$ docker-compose push
  10. WARNING: The REDIS_PASSWORD variable is not set. Defaulting to a blank string.
  11. Pushing flask (insaneloafer/flask-redis:latest)...
  12. The push refers to repository [docker.io/insaneloafer/flask-redis]
  13. f447d33c161b: Pushed
  14. f7395da2fd9c: Pushed
  15. 5b156295b5a3: Layer already exists
  16. 115e0863702d: Layer already exists
  17. e10857b94a57: Layer already exists
  18. 8d418cbfaf25: Layer already exists
  19. 764055ebc9a7: Layer already exists
  20. latest: digest: sha256:c909100fda2f4160b593b4e0fb692b89046cebb909ae90546627deca9827b676 size: 1788
  21. vagrant@swarm-manager:~/flask-redis$

通过stack启动服务

  1. vagrant@swarm-manager:~/flask-redis$ env REDIS_PASSWORD=ABC123 docker stack deploy --compose-file docker-compose.yml flask-demo
  2. Ignoring unsupported options: build
  3. Creating network flask-demo_default
  4. Creating service flask-demo_flask
  5. Creating service flask-demo_redis-server
  6. vagrant@swarm-manager:~/flask-redis$
  7. vagrant@swarm-manager:~/flask-redis$ docker stack ls
  8. NAME         SERVICES   ORCHESTRATOR
  9. flask-demo   2          Swarm
  10. vagrant@swarm-manager:~/flask-redis$ docker stack ps flask-demo
  11. ID             NAME                        IMAGE                            NODE            DESIRED STATE   CURRENT STATE
  12. ERROR     PORTS
  13. lzm6i9inoa8e   flask-demo_flask.1          insaneloafer/flask-redis:latest   swarm-manager   Running         Running 23 seconds ago
  14. ejojb0o5lbu0   flask-demo_redis-server.1   redis:latest                     swarm-worker2   Running         Running 21 seconds ago
  15. vagrant@swarm-manager:~/flask-redis$ docker stack services flask-demo
  16. ID             NAME                      MODE         REPLICAS   IMAGE                            PORTS
  17. mpx75z1rrlwn   flask-demo_flask          replicated   1/1        insaneloafer/flask-redis:latest   *:8080->5000/tcp
  18. z85n16zsldr1   flask-demo_redis-server   replicated   1/1        redis:latest
  19. vagrant@swarm-manager:~/flask-redis$ docker service ls
  20. ID             NAME                      MODE         REPLICAS   IMAGE                            PORTS
  21. mpx75z1rrlwn   flask-demo_flask          replicated   1/1        insaneloafer/flask-redis:latest   *:8080->5000/tcp
  22. z85n16zsldr1   flask-demo_redis-server   replicated   1/1        redis:latest
  23. vagrant@swarm-manager:~/flask-redis$ curl 127.0.0.1:8080
  24. Hello Container World! I have been seen 1 times and my hostname is 21d63a8bfb57.
  25. vagrant@swarm-manager:~/flask-redis$ curl 127.0.0.1:8080
  26. Hello Container World! I have been seen 2 times and my hostname is 21d63a8bfb57.
  27. vagrant@swarm-manager:~/flask-redis$ curl 127.0.0.1:8080
  28. Hello Container World! I have been seen 3 times and my hostname is 21d63a8bfb57.
  29. vagrant@swarm-manager:~/flask-redis$

创建的网络

  • docker stack使用docker-compose.yaml文件创建的是overlay网络
  • docker compose使用docker-compose.yaml文件创建的是bridge网络
    [vagrant@swarm-manager flask-redis]$ docker network ls
NETWORK ID     NAME                 DRIVER    SCOPE
c2531fc17c98   bridge               bridge    local
6934619098b3   docker_gwbridge      bridge    local
4cddaxhz871q   flask-demo_default   overlay   swarm
cfbe4b854234   host                 host      local
dj39uni7uy49   ingress              overlay   swarm
0ca57d809728   none                 null      local

    如果docker-compose.yaml指定了bridge网络，此时此文件只能适用于开发环境的单机模式。所以最好是区分开发环境和生产环境，分别使用两个compose文件 九、Docker-Swarm-stack部署多service应用 - 图1