[FIXED] Jenkins: toomanyrequests with docker.com

Issue

We are using the Jenkins docker plugin to pull the CI image from docker.com. This has worked for years:

def oppossumCI = docker.image('hyrise/opossum-ci:20.04');
oppossumCI.pull()

Since a couple of days, we are seeing this error message:

+ docker pull hyrise/opossum-ci:20.04
Error response from daemon: toomanyrequests: You have reached your pull rate limit.
You may increase the limit by authenticating and upgrading: https://www.docker.com/increase-rate-limit

Solution

If you are not logged in to docker.com, "you" as used in the error message seems to be identified by the IP address. In a setup where multiple systems pull from docker.com with the same IP address (e.g., a university), you will quickly run out of resources. As a result, things may suddenly look broken just because someone else on the network depleted the resources.

By using a free Docker account, your CI server will be assigned its own resources.

Steps:

1. Create an account on hub.docker.com.
2. Add the credentials to Jenkins' credential store. In this example, the credentials have the ID docker.
3. Modify your Jenkinsfile to use the account:

docker.withRegistry('https://registry.hub.docker.com', 'docker') {
  def oppossumCI = docker.image('hyrise/opossum-ci:20.04');
  oppossumCI.pull()
  ...
}

If the resources provided for the free user are not sufficient, you might need to upgrade to a paid account.

Answered By - mrks