In these steps, you’ll use the
docker-stack.yml file to
deploy the voting application to the swarm you just created.
docker-stack.yml file must be located on a manager for the swarm where you want to deploy the application stack.
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 -o docker-stack.yml https://raw.githubusercontent.com/docker/example-voting-app/master/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
curlinstalled. If not, you can get curl here.
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
Log into the manager node.
$ docker-machine ssh manager
ssh login should put you in
/home/docker/ by default.
Check to make sure that the
.yml file is there, using
docker@manager:~$ ls /home/docker/ docker-stack.yml
You can use
cat to inspect the file.
We’ll deploy the application from the manager.
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
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
In the next steps, we’ll view components of the running app on web pages, and take the app for a test drive.