example-voting-app | Example distributed app composed of multiple containers | Continuous Deployment library
kandi X-RAY | example-voting-app Summary
kandi X-RAY | example-voting-app Summary
Example distributed app composed of multiple containers for Docker, Compose, Swarm, and Kubernetes
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QUESTION
I'm following a tutorial on docker stack, swarm, compose, etc.
the teacher connects to a VM of the swarm and then deploys a docker stack from this directory docker@node1:~/srv/swarm-stack-1
:
ANSWER
Answered 2021-Jun-03 at 10:23SOLVED
The solution here is not to ssh into the VM, and instead to change to the VM context with:
QUESTION
I am trying to understand the docker sample application 'example-voting-app'. I am trying to build the app with docker-compose. I am confused with the behaviour of 'command' key in docker compose file and the CMD Instruction in Dockerfile. The application consists of a service called 'vote'. The configuration for the vote service in docker-compose.yml file is:
...ANSWER
Answered 2020-May-14 at 10:08The Docker Compose command:
, or everything in a docker run
invocation after the image name, overrides the Dockerfile CMD
.
If the image also has an ENTRYPOINT
, the command you provide here is passed as arguments to the entrypoint in the same way the Dockerfile CMD
does.
For a typical Compose setup you shouldn't need to specify a command:
. In a Python/Flask context, the most obvious place it's useful is if you're also using a queueing system like Celery with the same shared code base: you can use command:
to run a Celery worker off of the image you build, instead of a Flask application.
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