I'm calling about 10 flows per hour that use the Prefect image on DockerHub, and it appears I've hit the unauthenticated rate limit:

Flow run could not be submitted to infrastructure: TaskFailedToStart - CannotPullContainerError: pull image manifest has been retried 5 time(s): httpReadSeeker: failed open: unexpected status code <https://registry-1.docker.io/v2/prefecthq/prefect/manifests/sha256:274a9d0cf48074565a9bf5dc96b7d922f97d6972689f743a5b971893a6fc67dc>:

 429 Too Many Requests - Server message: toomanyrequests: You have reached your unauthenticated pull rate limit. <https://www.docker.com/increase-rate-limit>

Is there any way for me to authenticate our Prefect Cloud with a DockerHub account? Or is it recommended I push the Prefect image I'm using to our private ECR?

hey! This rate limit is between your ECS and docker hub at runtime. Prefect Cloud's not in the equation here. You'd have to authenticate your ECS with dockerhub,. Which I believe you can do in your task definition with `repositoryCredentials`: https://docs.aws.amazon.com/AmazonECS/latest/APIReference/API_ContainerDefinition.html#ECS-Type-ContainerDefinition-repositoryCredentials You can also like you said push the prefect image to ECR or setup a pull through cache in ECR as well

Okay much appreciated! That makes sense