Goal

+==================================+
|  +-----------+                   |    +=========+
|  | epFront   |   +--------------+|    | front:  |
|  | -------   |   | front service|---->|  nginx  |
|  |  Path:/   >-->+--------------+|    +=========+
|  |  Path:/api>-->+--------------+|    +=========+    +=========+
|  +-----------+   | svc service  |--+->| svc:    |-+->| db:     |
|traefik           +--------------+| |  |  nodejs | |  |  redis  |
+==================================+ |  +=========+ |  +=========+
docker network                       |              |
- - - - - - - - - - - - - - - - - - \|/ - - - - - - | - - - - - -
developer machine              +=========+          |
                               | svc(lc) |----------+
                               |  nodejs |
                               +=========+

Autodetect and decide - when svc container is down - route to svc(lc).

Build

The only thing you have to build is the svr container.

Build svr container

cd svr && npm i && npm run dockerize

demo

once built, run the docker compose:

 docker-compose up -d

run svr in local-dev mode on your machine on port 3001

 node svr/index.js

Mind that the baked in default port is 3001, which is also the port used in the buz/config/dynamic.http.yaml.

browse to your http://localhost
try items foo, bar - expect reply from compose.
stop svc

 docker-compose stop svc

try items foo, bar - expect reply from local .
start svc

 docker-compose start svc

try items foo, bar - expect reply from compose.

** NO RESTARTS REQUIRED ! **

what's going on?

Whenever the svc container is running - it creates routers with higher priority which serve reply from the container. These high priority routes "shadow" the routes of the file provider.

Whenever the svc container is stopped - these routes are removed, and the routes from the file provider take effect, and the reply is tried from your local machine.

osher/lcdev-using-compose-and-traefik

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