How to configure docker/docker-compose to use Nexus by default instead of docker.io?

Question

I'm trying to use TestContainers to run JUnit tests. However, I'm getting a InternalServerErrorException: Status 500: {"message":"Get https://registry-1.docker.io/v2/: Forbidden"} error.

Please note, that I am on a secure network.

I can replicate this by doing docker pull testcontainers/ryuk on the command line.

$ docker pull testcontainers/ryuk
Using default tag: latest
Error response from daemon: Get https://registry-1.docker.io/v2/: Forbidden

However, I need it to pull from our nexus service: https://nexus.company.com/18443. Inside the docker-compose file, I'm already using the correct nexus image path. (Verified by manually starting it with docker-compose. However TestContainers also pulls in additional images which are outside the docker-compose file. It is these images that are causing the failure.

I'd be glad for either a Docker Desktop or TestContainers configuration change that would fix this for me.

Note: I've already tried adding the host URL for nexus to the Docker Engine JSON configuration on the dashboard, with no change to the resulting error when doing docker pull.

Answer 1

从版本开始，1.15.1Testcontainers 允许自动将前缀附加到所有 docker 镜像。如果您的私有注册表配置为 docker hub 镜像，此功能应该有助于解决上述问题。

引用文档：

然后，您可以配置 Testcontainers 将前缀registry.mycompany.com/mirror/应用于它尝试从 Docker Hub 提取的每个映像。这可以通过以下两种方式之一完成：

• 设置环境变量 TESTCONTAINERS_HUB_IMAGE_NAME_PREFIX=registry.mycompany.com/mirror/
• 通过配置文件，在以下任一位置设置 hub.image.name.prefix：
  • 用户主目录中的 ~/.testcontainers.properties 文件，或者
  • 类路径上名为 testcontainers.properties 的文件

基本上设置与 docker-compose 文件中的图像相同的前缀。

如果由于某种原因您坚持使用旧版本，不推荐使用的解决方案是仅覆盖该ryuk.container.image属性。在这里阅读相关内容。