Bug: sam local invoke - Docker - Have you got it installed and running

[mattiamatrix]

Description:

I have seen similar issues around but I am not sure this is exactly the same. When I try to local invoke a Lambda defined in my cdk project I get the error Error: Running AWS SAM projects Locally requires Docker. Have you got it installed and running?. But Docker is clearly running in the background.

I read something about DOCKER_HOST but if I touch the cdk build breaks instead

sam --version: SAM CLI, version 1.81.0
docker --version: Docker version 20.10.24, build 297e128

Steps to reproduce:

sam local invoke -t

Observed result:

Error

Expected result:

No error

Additional environment details (Ex: Windows, Mac, Amazon Linux etc)

1. OS: macOs 13.3.1 (22E261)
2. sam --version: SAM CLI, version 1.81.0
3. AWS region: n/a

{
  "version": "1.81.0",
  "system": {
    "python": "3.8.16",
    "os": "macOS-13.3.1-arm64-arm-64bit"
  },
  "additional_dependencies": {
    "docker_engine": "Not available",
    "aws_cdk": "2.74.0 (build 70e2a33)",
    "terraform": "Not available"
  }
}```

`Add --debug flag to command you are running`

[lucashuy]

Hi, thanks for opening this issue! It looks like the Docker context might be using a different context than what SAM CLI expects (from your screenshot, where Context: desktop-linux).

Following #4329 (comment), does this work around work for you?

[mattiamatrix]

My understanding is that updating DOCKER_HOST might affect other applications.

sudo ln -sf "$HOME/.docker/run/docker.sock" /var/run/docker.sock suggested here looks a workaround

[lucashuy]

Setting the DOCKER_HOST environment variable right before the command (DOCKER_HOST=<...> sam local invoke ...) should only set it for that particular command run. Symlinking the Docker socket in the home directory to the default Docker one should work, however this seems to be more of a global approach since this persists and will affect things other than SAM CLI.

[mildaniel]

Seems like discussions on this issue have stalled so I will close this out now. Should anything else arise or you have anymore questions, please don't hesitate to open up a new issue.

[github-actions]

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