Deploy the application

Estimated reading time: 2 minutes

In these steps, you’ll use the docker-stack.yml file to deploy the voting application to the swarm you just created.

Copy docker-stack.yml to the manager

The docker-stack.yml file must be located on a manager for the swarm where you want to deploy the application stack.

  1. Get docker-stack.yml either from the source code in the lab or by copying it from the example given here.

    If you prefer to download the file directly from our GitHub repository rather than copy it from the documentation, you can use a tool like curl. This command downloads the raw file to the current directory on your local host. You can copy-paste it into your shell if you have curl:

     curl -o docker-stack.yml


    • To get the URL for the raw file on GitHub, either use the link in the example command above, or go to the file on GitHub here, then click Raw in the upper right.
    • You might already have curl installed. If not, you can get curl here.
  2. Copy docker-stack.yml from your host machine onto the manager.

    $ docker-machine scp ~/sandbox/voting-app/docker-stack.yml manager:/home/docker/.
    docker-stack.yml                                                                      100% 1558     1.5KB/s   00:00
  3. Log into the manager node.

    $ docker-machine ssh manager

    The ssh login should put you in /home/docker/ by default.

  4. Check to make sure that the .yml file is there, using ls.

    docker@manager:~$ ls /home/docker/

    You can use vi or cat to inspect the file.

Deploy the app

We’ll deploy the application from the manager.

  1. Deploy the application stack based on the .yml using the command docker stack deploy as follows.

    docker stack deploy --compose-file docker-stack.yml vote

    Here is an example of the command and the output.

    docker@manager:~$ docker stack deploy --compose-file docker-stack.yml vote
    Creating network vote_default
    Creating network vote_backend
    Creating network vote_frontend
    Creating service vote_result
    Creating service vote_worker
    Creating service vote_visualizer
    Creating service vote_redis
    Creating service vote_db
    Creating service vote_vote
  2. Verify that the stack deployed as expected with docker stack services <APP-NAME>.

    docker@manager:~$ docker stack services vote
    ID            NAME             MODE        REPLICAS  IMAGE
    0y3q6lgc0drn  vote_result      replicated  2/2       dockersamples/examplevotingapp_result:before
    fvsaqvuec4yw  vote_redis       replicated  2/2       redis:alpine
    igev2xk5s3zo  vote_worker      replicated  1/1       dockersamples/examplevotingapp_worker:latest
    vpfjr9b0qc01  vote_visualizer  replicated  1/1       dockersamples/visualizer:stable
    wctxjnwl22k4  vote_vote        replicated  2/2       dockersamples/examplevotingapp_vote:before
    zp0zyvgaguox  vote_db          replicated  1/1       postgres:9.4

What’s next?

In the next steps, we’ll view components of the running app on web pages, and take the app for a test drive.

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