I have a microservice based node app. I am using docker, docker-compose and traefik for service discovery.
I have 2 microservices at this moment:
The issue I can't make a request from one microservice to another. Here are my docker compose config:
# all variables used in this file are defined in the .env file
version: "2.2"
services:
node-app-0:
container_name: node-app
restart: always
build: ./backend/server
links:
- ${DB_HOST}
depends_on:
- ${DB_HOST}
ports:
- "8000:3000"
labels:
- "traefik.port=80"
- "traefik.frontend.rule=Host:node-app.localhost"
reverse-proxy:
image: traefik # The official Traefik docker image
command: --api --docker # Enables the web UI and tells Traefik to listen to docker
ports:
- "80:80" # The HTTP port
- "8080:8080" # The Web UI (enabled by --api)
volumes:
- /var/run/docker.sock:/var/run/docker.sock
search-microservice:
container_name: ${CONTAINER_NAME_SEARCH}
restart: always
build: ./backend/search-service
links:
- ${DB_HOST}
depends_on:
- ${DB_HOST}
ports:
- "8002:3000"
labels:
- "traefik.port=80"
- "traefik.frontend.rule=Host:search-microservice.localhost"
volumes:
node-ts-app-volume:
external: true
Both the node-app and the search-microservice expose the port 3000.
Why can't I call http://search-microservice.localhost:8002 from the node app ? calling it from the browser works though.
Because node-app is a container and to access other containers it has to use service name and internal port.
In your case it is search-microservice:3000
.
To access host PC and exposed ports, you have to use host.docker.internal
name for all services and external port.