Multi tier Docker apps with Panamax
You can see the resulting todomvc.pmx template file in GitHub (and see that it’s very similar to my fig.yml), but it’s a visual tool, so let’s look at some screenshots, starting with an overview of the service:
Zooming in, the template is made up out of three underlying services:
I started out with the mysql service, which is why it has the _latest suffix dangling there. I could edit it out, but didn’t bother. Clicking on that service the only things that matter are the EXPOSEd port and the volume mapping:
It will be interesting to see what Panamax adds under the hood for volumes, as right now the mount point needs to be created manually, and such things don’t play well in multi server deployments.
The Sinatra app server needs a link back to the database in addition to exposing its own port:
Finally the container with Nginx for SSL termination links back to the app server and binds to port 443:
Because the whole thing is running inside VirtualBox it’s necessary to do another port forward. The instructions for that are included in the template and can be brought up on screen:
Having set the application up I then entered a GitHub token in order to allow it to be saved as a template.
Give it a try for yourself. Add cpswan/panatest to your sources:
Then search for todomvc:
Filed under: Docker, howto | 1 Comment
Tags: demo, Docker, Panamax, three tier