Cannot connect to docker-compose services in AWS CodeBuild - amazon-web-services

Question

I am trying to run Cypress e2e tests by spinning up docker-compose services and checking them with Cypress. What ever I do, I am not able to connect to another service either outside of the service or inside of one.
I tried adding running curl 127.0.0.1 to check if service is reachable, but it returns "Failed to connect to 127.0.0.1 port 80: Connection refused"
My CodeBuild environment has privileged set to true.
This is my buildspec:
version: 0.2
phases:
pre_build:
commands:
- echo Logging in to Amazon ECR...
- aws ecr get-login-password --region $AWS_DEFAULT_REGION | docker login --username AWS --password-stdin $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com
build:
commands:
- echo Test Execution starting...
- AWS_ACCOUNT_ID=$AWS_ACCOUNT_ID
- AWS_DEFAULT_REGION=$AWS_DEFAULT_REGION
- docker-compose --file=deployment/docker.yml up -d main webserver
- docker-compose --file=deployment/docker.yml run cypress
post_build:
commands:
- docker-compose --file=deployment/docker.yml down
My docker-compose file is very simple. It get's images that have already been built.
version: '3'
services:
main:
image: ${AWS_ACCOUNT_ID}.dkr.ecr.${AWS_DEFAULT_REGION}.amazonaws.com/main:${ENVIRONMENT}
build:
context: ../main
container_name: main
ports:
- "3000:3000"
networks:
- network
webserver:
image: ${AWS_ACCOUNT_ID}.dkr.ecr.${AWS_DEFAULT_REGION}.amazonaws.com/webserver:${ENVIRONMENT}
build:
context: ../frontend
container_name: webserver
ports:
- "80:80"
depends_on:
- main
networks:
- network
cypress:
image: ${AWS_ACCOUNT_ID}.dkr.ecr.${AWS_DEFAULT_REGION}.amazonaws.com/cypress:${ENVIRONMENT}
build:
context: ../cypress
command: "--browser chrome"
depends_on:
- webserver
- main
environment:
- CYPRESS_baseUrl=http://webserver:80
networks:
- network
networks:
network:
driver: bridge

Answer 1

I had a similar issue. My cypress instance wasn´t able to connect with the service to test.
I solved it setting "network_mode" to "host" and the base url to "localhost" in the cypress service.
In your case, it would be something similar to this:
cypress:
image: ${AWS_ACCOUNT_ID}.dkr.ecr.${AWS_DEFAULT_REGION}.amazonaws.com/cypress:${ENVIRONMENT}
build:
context: ../cypress
command: "--browser chrome"
depends_on:
- webserver
- main
environment:
- CYPRESS_baseUrl=http://localhost:80
network_mode: "host"