GitLab CI Job Exceeds Network Bandwidth Limit

The job exceeds the network bandwidth limit set for the runner or job.

Understanding GitLab CI

GitLab CI is a powerful tool integrated into GitLab that allows developers to automate the testing, building, and deployment of their code. It is designed to streamline the development process by providing continuous integration and continuous deployment (CI/CD) capabilities. By using GitLab CI, teams can ensure that their code is always in a deployable state, reducing the risk of integration issues.

Identifying the Symptom

One common issue that developers may encounter when using GitLab CI is the 'Job Exceeds Network Bandwidth Limit' error. This symptom is typically observed when a job within a pipeline consumes more network bandwidth than allowed by the runner's configuration. As a result, the job may fail, causing disruptions in the CI/CD process.

What You Might See

When this issue occurs, you might see error messages in the job logs indicating that the network bandwidth limit has been exceeded. This can manifest as failed jobs or timeouts during execution.

Exploring the Issue

The 'Job Exceeds Network Bandwidth Limit' issue arises when the network usage of a job surpasses the predefined limits set in the runner's configuration. Each GitLab runner can be configured with specific resource limits, including CPU, memory, and network bandwidth. Exceeding these limits can lead to job failures.

Why It Happens

This issue often occurs in jobs that involve heavy data transfer, such as downloading large files, cloning large repositories, or interacting with external APIs. If the network bandwidth is not adequately configured, these operations can quickly exceed the allowed limits.

Steps to Resolve the Issue

To resolve the 'Job Exceeds Network Bandwidth Limit' issue, you can take several steps to optimize your job or adjust the runner's configuration.

Optimize Network Usage

  • Review your job scripts to identify any unnecessary data transfers. Minimize the size of files being downloaded or uploaded.
  • Consider using caching mechanisms to avoid repeated downloads of the same files. GitLab CI provides caching features that can help reduce network usage.

Adjust Runner Configuration

  • Access the runner's configuration file, typically located at /etc/gitlab-runner/config.toml.
  • Locate the section related to network bandwidth limits. You can find more details on configuring runners in the GitLab Runner documentation.
  • Increase the bandwidth limit by adjusting the relevant parameters. Ensure that the new limits align with your job's requirements and the available network resources.

Conclusion

By understanding the root cause of the 'Job Exceeds Network Bandwidth Limit' issue and taking appropriate steps to optimize your job or adjust the runner's configuration, you can ensure smoother execution of your CI/CD pipelines. For more information on managing GitLab CI jobs and runners, refer to the official GitLab CI documentation.

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The job failed to download artifacts from a previous job, possibly due to missing artifacts or network issues.
GitLab CI Artifact Upload Failed
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The script defined in the job failed due to an error in the commands or scripts being executed.
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The runner system encountered an unexpected error, such as a hardware failure or a network issue.

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