Docker recently announced that rate limits will apply to anonymous image pulls from Docker Hub starting on November 1st, 2020. But as long as you add Docker authentication to your pipeline config, you can avoid service disruption.
If you use the Docker executor or pull Docker images when using the machine executor on CircleCI, we encourage you to authenticate. Because the anonymous API rate limits are based on IP address, they will impact CircleCI cloud and server customers. Authenticated users get higher per-user rate limits regardless of IP.
We are currently working on a partnership with Docker to minimize the impact of this rate limit change for our users and will share more details as we get them.
If you have any questions or concerns, please feel free to post them here.
Update: Our teams are hard at work creating solutions and gathering information about this change. Our support team has put together a list of FAQs, including how to tell if your authentication was successful.
We will answer questions as we can, and we’re working with Docker to make sure this is as smooth as possible. Updates will be posted here!
Thanks and happy building!