connecting AWS SAM Local with dynamodb in docker

Question

I\'ve set up an api gateway/aws lambda pair using AWS sam local and confirmed I can call it successfully after running

sam local start-api

I\'ve

Answer 1

As @Paul mentioned, it is about configuring your network between the docker containers - lambda and database.

Another approach that worked for me (using docker-compose).

docker-compose:

version: '2.1'

services:
  db:
    image: ...
    ports:
      - "3306:3306"
    networks:
      - my_network
    environment:
      ...
    volumes:
      ...

networks:
  my_network:

Then, after docker-compose up, running docker network ls will show:

NETWORK ID          NAME                        DRIVER              SCOPE
7eb440d5c0e6        dev_my_network              bridge              local

My docker container name is dev_db_1.

My js code is:

const connection = mysql.createConnection({
    host: "dev_db_1",
    port: 3306,
    ...
});

Then, running the sam command:

sam local invoke --docker-network dev_my_network -e my.json

Stack:

• Docker: 18.03.1-ce
• Docker-compose: 1.21.1
• MacOS HighSierra 10.13.6