AWS ECR docker push fails with EOF


If you're pushing a Docker image to an AWS Elastic Container Registry repository and you encounter an EOF error:

$ docker push ${ECR_ID}${IMAGE}:latest
6d6356604420: Layer already exists
c2dc8b8960d7: Layer already exists

$ journalctl -u docker.service
Mar 17 15:02:06 hostname dockerd[16882]: time="2022-03-17T15:02:06.394662889-04:00" level=error msg="Upload failed, retrying: EOF"
Mar 17 15:23:58 hostname dockerd[17716]: time="2022-03-17T15:23:58.438706900-04:00" level=error msg="Upload failed: EOF"

then check the IAM policy that is supposed to authorize you to push to your repository, as ECR may "silently" deny unauthorized pushes with an EOF. If this is the case, you'll see an event in CloudTrail documenting that your push was denied.

When this happened to me, it was because I had a malformed ARN for my repository in the IAM policy I wrote. In particular, I specified


instead of