Using Containers
Cloud Container-based plans will be deprecated from July 18th 2022. For steps to migrate to a usage-based plan, see this Discuss post.
You can read about usage-based plans in detail in this document.
Overview
Every change committed to your version control system triggers CircleCI to checkout your code and run your job workflow inside a fresh, on-demand, isolated container or virtual machine with access to the following, depending on your plan:
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Concurrency - Utilizing multiple containers to run multiple builds at the same time. To take advantage of concurrency, configure your development workflow using the Orchestrating Workflows document and run your jobs in parallel as shown in the Sample Config Files document.
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Parallelism - Splitting tests across multiple containers, allowing you to dramatically speed up your test suite. Update your
.circleci/config.ymlfile to run your tests in parallel as described in the Configuring CircleCI document. Learn how to update your config file to parallelize and split tests to decrease your build time by reading the Running Tests in Parallel documentation.
Migrating to a usage-based plan
Refer to this Discuss posts for step-by-step instructions to migrate your plan, or contact customer support.
Help make this document better
This guide, as well as the rest of our docs, are open source and available on GitHub. We welcome your contributions.
- Suggest an edit to this page (please read the contributing guide first).
- To report a problem in the documentation, or to submit feedback and comments, please open an issue on GitHub.
- CircleCI is always seeking ways to improve your experience with our platform. If you would like to share feedback, please join our research community.
Need support?
Our support engineers are available to help with service issues, billing, or account related questions, and can help troubleshoot build configurations. Contact our support engineers by opening a ticket.
You can also visit our support site to find support articles, community forums, and training resources.
CircleCI Documentation by CircleCI is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
