2026-09-03
Daily Tech Challenge
A team runs a fleet of self-hosted CI runners in one VPC behind a single NAT gateway. Builds intermittently fail at the first image pull, as shown. The same build always succeeds on a developer laptop, and the image and tag exist. What is happening, and what is the correct fix?
$ docker pull node:20-alpine 20-alpine: Pulling from library/node toomanyrequests: You have reached your unauthenticated pull rate limit. https://www.docker.com/increase-rate-limit # 40 minutes later, same runner, same command: $ docker pull node:20-alpine 20-alpine: Pulling from library/node Status: Downloaded newer image for node:20-alpine
Thursday, September 3, 2026 · A new challenge drops every day