[Bug]: Different private docker hub registries with supplying through withEnv causing no basic auth error

[wusunny2022]

Module

Core

Testcontainers version

1.20.4

Using the latest Testcontainers version?

Yes

Host OS

MacOS

Host Arch

ARM

Docker version

27.4.0

What happened?

I want to have different docker private registries setting for my docker compose file. Therefore I am using the approaches that uses placeholder ${DOCKER_REGISTRY_URL} and then supply the value dynamically in the code. The problem is that I got the no basic auth error when trying pull the image from the private registry when running test. I suppose it should be working without problem.

p.s:

1. I have already docker login in terminal so that I can pull the image from the terminal
2. Thanks for JapuDCret reply in How to login to private DockerHub registry in runtime? #968 (comment). If the url is hard-coded in the docker-compose file, the image can be pulled and test can be run without problem while on the other hands dynamically url is not working ()

The way I supply in the code (Kotlin)

val redisContainer = DockerComposeContainer(redisConfigFile)
    .withExposedService(
        serviceName,
        servicePort,
        Wait.forListeningPort().withStartupTimeout(Duration.ofMillis(timeout))
    )
    .withEnv("DOCKER_REGISTRY_URL", dockerRegistry)

Example docker compose file

services:
  redis:
    image: ${DOCKER_REGISTRY_URL}/redis:alpine3.20
    ports:
      - 6379
    command: >
      redis-server
      --requirepass password
    networks:
      - test-my-redis-network

networks:
  test-my-redis-network:

Relevant log output

no basic auth credentials

Additional Information

No response

[eddumelendez]

String interpolation doesn't work on Testcontainers' Docker Compose support. Instead, images are pulled programmatically, see

testcontainers-java/core/src/main/java/org/testcontainers/containers/ComposeDelegate.java

Line 98 in 94e4c85

void pullImages() {

You can look at Image Name Substitution instead.