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cert-manager adds certificates and certificate issuers as resource types in Kubernetes clusters, and simplifies the process of obtaining, renewing and using those certificates.
It supports issuing certificates from a variety of sources, including Let's Encrypt (ACME), HashiCorp Vault, and Venafi TPP / TLS Protect Cloud, as well as local in-cluster issuance.
cert-manager also ensures certificates remain valid and up to date, attempting to renew certificates at an appropriate time before expiry to reduce the risk of outages and remove toil.
Documentation
Documentation for cert-manager can be found at cert-manager.io.
For a more comprehensive guide to issuing your first certificate, see our getting started guide.
Installation
Installation is documented on the website, with a variety of supported methods.
Developing cert-manager
We actively welcome contributions and we support both Linux and macOS environments for development.
Different platforms have different requirements; we document everything on our Building cert-manager
website page.
Note in particular that macOS has several extra requirements, to ensure that modern tools are installed and available. Read the page before
getting started!
Troubleshooting
If you encounter any issues whilst using cert-manager, we have a number of ways to get help:
If you believe you've found a bug and cannot find an existing issue, feel free to open a new issue!
Be sure to include as much information as you can about your environment.
Community
The cert-manager-dev Google Group
is used for project wide announcements and development coordination.
Anybody with a Google account can join the group by visiting the group and clicking "Join Group".
Meetings
We have several public meetings which any member of our Google Group is more than welcome to join!
Check out the details on our website. Feel
free to drop in and ask questions, chat with us or just to say hi!
Contributing
We welcome pull requests with open arms! There's a lot of work to do here, and
we're especially concerned with ensuring the longevity and reliability of the
project. The contributing guide
will help you get started.
Coding Conventions
Code style guidelines are documented on the coding conventions page
of the cert-manager website. Please try to follow those guidelines if you're submitting a pull request for cert-manager.
Importing cert-manager as a Module
⚠️ Please note that cert-manager does not currently provide a Go module compatibility guarantee. That means that
most code under pkg/ is subject to change in a breaking way, even between minor or patch releases and even if
the code is currently publicly exported.
The lack of a Go module compatibility guarantee does not affect API version guarantees
under the Kubernetes Deprecation Policy.