ECR is not storing tags for pushed images

Question

I'm trying to push a Docker image to ECR with a command like the following (edited to remove personal information)

```
docker push ACCOUNT_ID.dkr.ecr.us-east-2.amazonaws.com/MY_IMAGE/NAME:TAG
```

However, when I view the image in the ECR console, the tag shows up as a dash (`-`). The CloudTrail event doesn't show any `imageTag` attribute in `requestParameters`, though I do see that in older `PutImage` events. When I try to pull the image with the tag I used when I pushed it, ECR reports that the image doesn't exist.

Is this somehow user error, or is this a regression in ECR? At the time of writing, https://health.aws.amazon.com/health/status doesn't report any ongoing issues with ECR or any other services.

re:Post Agent · Answer

This appears to be an issue with how your image is being pushed to ECR. When pushing Docker images to Amazon ECR, the tag should be properly applied and visible in the ECR console.

When you push an image to ECR using the format `ACCOUNT_ID.dkr.ecr.us-east-2.amazonaws.com/MY_IMAGE/NAME:TAG`, the tag (in this case "TAG") should be stored and visible in the ECR console. If you're seeing a dash instead, something is going wrong with the tagging process.

Here are some things to check:

1. Verify that your Docker image is correctly tagged locally before pushing. You can use `docker images` to confirm.

2. Make sure you're authenticated to the ECR registry using the AWS CLI before pushing.

3. Check that the repository exists in ECR before pushing. The repository must exist before you can push images to it.

4. If you omit the image tag when pushing, ECR assumes the tag is "latest" by default, but it shouldn't show as a dash.

5. When an image is successfully pushed to ECR, an EventBridge event is generated with details including the image tag. You might want to check if these events are being properly generated.

Also, be aware that when pulling images, there's a difference between pulling by tag versus pulling by digest. If you're trying to pull by digest but using a tag format, that could explain why ECR reports the image doesn't exist.

If you've verified all these steps and the issue persists, it could potentially be a service issue. In that case, you might want to contact AWS Support for further assistance.  
**Sources**  
[Amazon ECR events and EventBridge - Amazon ECR](https://docs.aws.amazon.com/AmazonECR/latest/userguide/ecr-eventbridge.html)  
[Pushing a Docker image to an Amazon ECR private repository - Amazon ECR](https://docs.aws.amazon.com/AmazonECR/latest/userguide/docker-push-ecr-image.html)  
[Container image manifest formats in Amazon ECR public - Amazon ECR Public](https://docs.aws.amazon.com/AmazonECR/latest/public/image-manifest-formats.html)

ECR is not storing tags for pushed images

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