AWS SAM: Build Failed Error: Docker is unreachable. Docker needs to be running to build inside a container

Question

Im running AWS SAM and using sam build --use-container then get the following error.

Starting Build inside a container Building function 'SamTutorialFunction Build Failed Error: Docker is unreachable. Docker needs to be running to build inside a container

I run sudo service docker start before and still get the same error.

user_14297849 · Answer

I had the same issue. The problem was that docker was installed to run as the root user. AWS SAM is trying to access as your logged in user. You can set docker to run as non-root user (without sudo) by adding your user to the docker group. See https://docs.docker.com/engine/install/linux-postinstall/

user_18878211 · Answer

If you are running Ubuntu on WSL2, You need to enable integration between Docker and WSL2 in order to run

sam build --use-container

Steps:

Download Docker Desktop https://desktop.docker.com/win/main/amd64/Docker%20Desktop%20Installer.exe
Go to settings => resources => WSL integration.
Check the enable integration with additional distros.

AWS SAM: Build Failed Error: Docker is unreachable. Docker needs to be running to build inside a container

2 Answers