I am fairly new and was building a microservice using nodejs. My problem is that my API gateway is throwing errors when I start my containers using docker compose. I can send request to my service containers directly and the API's are responding. But when I forward them via API gateway I am having problems. emphasized text
Following are my files in apiGateway directory: Docker file:
FROM devopsfaith/krakend
COPY krakend.json /etc/krakend/
This is a image which is built and placed on github specifically for this gateway.
{
"version": 2,
"extra_config": {
"github_com/devopsfaith/krakend-cors": {
"allow_origins": ["*"],
"allow_headers": ["*"],
"expose_headers": ["Content-Length"],
"max_age": "12h",
"allow_methods": ["GET", "HEAD", "POST"]
}
},
"timeout": "3000ms",
"cache_ttl": "300s",
"output_encoding": "json",
"name": "Gateway",
"port": 3001,
"endpoints": [
{
"endpoint": "/auth/signup-customer",
"method": "POST",
"output_encoding": "json",
"extra_config": {},
"backend": [
{
"url_pattern": "/auth/signup-customer",
"host": ["http://auth-service:4000"],
"method": "POST"
}
]
},
{
"endpoint": "/auth/signup-restaurant",
"method": "POST",
"output_encoding": "json",
"extra_config": {},
"backend": [
{
"url_pattern": "/auth/signup-restaurant",
"host": ["http://auth-service:4000"],
"method": "POST"
}
]
},
{
"endpoint": "/auth/login",
"method": "POST",
"output_encoding": "json",
"extra_config": {},
"backend": [
{
"url_pattern": "/auth/login",
"host": ["http://auth-service:4000"],
"method": "POST"
}
]
},
{
"endpoint": "/auth/check",
"method": "GET",
"output_encoding": "json",
"extra_config": {},
"backend": [
{
"url_pattern": "/auth/check",
"host": ["http://auth-service:4000"],
"method": "GET"
}
]
},
{
"endpoint": "/products/_search",
"method": "POST",
"output_encoding": "json",
"extra_config": {},
"backend": [
{
"url_pattern": "/products/_search",
"host": ["http://elasticsearch:9200"],
"method": "POST"
}
]
},
{
"endpoint": "/health",
"method": "GET",
"output_encoding": "json",
"extra_config": {
"github.com/devopsfaith/krakend/proxy": {
"static": {
"data": {
"status": "OK"
},
"strategy": "always"
}
}
},
"backend": [
{
"url_pattern": "/fake",
"encoding": "json",
"sd": "static",
"method": "GET",
"extra_config": {}
}
]
}
]
}
The above code is a json file with my endpoints. Currently I am only test authentication api endpoints.
Auth Service Docker file:
FROM node:14
# Create app directory
WORKDIR /app
# Install app dependencies
# A wildcard is used to ensure both package.json AND package-lock.json are copied
# where available (npm@5+)
COPY package*.json ./
RUN npm install
# If you are building your code for production
# RUN npm ci --only=production
# Bundle app source
COPY . .
EXPOSE 4000
CMD ["npm","start"]
Docker compose file
version: "3"
services:
api-gateway:
build: "./gateway"
ports:
- 3001:3001
auth-service:
build: "./authService"
ports:
- 4000:4000
environment:
- DB_URL = mongodb://db/MagicMeal
volumes:
- ./authService:/app
item-service:
build: "./itemService"
ports:
- 5000:5000
environment:
- DB_URL = mongodb://db/MagicMeal
volumes:
- ./itemService:/app
user-service:
build: "./userService"
ports:
- 7000:7000
environment:
- DB_URL = mongodb://db/MagicMeal
volumes:
- ./userService:/app
# db:
# image: mongo:latest
# ports:
# - 27017:27017
# volumes:
# - ./MagicMeal:/data/db
# volumes:
# MagicMeal:
Below is the error image In the image you can see an error that says connection refuse. Now this error comes when I call my api using the following url : "http://localhost:3001/auth/check" as this is my api gateway address which reroutes the request to "localhost:4000/auth/check" .My gateway is on the port 3001 and my aut service on port 4000. But if i simply hit "localhost:4000/auth/check" i get a response. But the same request initiated via gate gives error click here to open the error image
