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Contributing

Welcome to OpenTelemetry specifications repository!

Before you start - see OpenTelemetry general contributing requirements and recommendations.

Sign the CLA

Before you can contribute, you will need to sign the Contributor License Agreement.

Proposing a change

Significant changes should go through the OpenTelemetry Enhancement Proposal process.

Writing specs

Specification is written in markdown format. Please make sure files are rendered correctly on GitHub.

Be sure to clearly define the specification requirements using the key words defined in BCP 14 [RFC2119] [RFC8174] while making sure to heed the guidance laid out in RFC2119 about the sparing use of imperatives:

Imperatives of the type defined in this memo must be used with care and sparingly. In particular, they MUST only be used where it is actually required for interoperation or to limit behavior which has potential for causing harm (e.g., limiting retransmissions) For example, they must not be used to try to impose a particular method on implementors where the method is not required for interoperability.

It is important to build a specification that is clear and useful, not one that is needlessly restrictive and complex.

Consistency Checks

The Specification has a number of tools it uses to check things like style, spelling and link validity. You can run all of these locally via:

make check

Note: This can take a long time as it checks all links. You should use this prior to submitting a PR to ensure validity. However, you can run individual checks directly.

See:

Semantic Conventions update

Semantic convention is declared in YAML files and markdown tables are generated from these files. Read about semantic convention updates here.

Autoformatting

The Specification has some autogenerated components and additionally can do automatic style/spell correction. You can run all of this via:

make fix

You can also run these fixes individually.

See:

Markdown style

Markdown files should be properly formatted before a pull request is sent out. In this repository we follow the markdownlint rules with some customizations. See markdownlint or settings for details.

We highly encourage to use line breaks in markdown files at 80 characters wide. There are tools that can do it for you effectively. Please submit proposal to include your editor settings required to enable this behavior so the out of the box settings for this repository will be consistent.

To check for style violations, use

make install-markdownlint # install markdownlint if not installed
make markdownlint # run at the root of the repo

To fix style violations, follow the instruction with the Node version of markdownlint. If you are using Visual Studio Code, you can also use the fixAll command of the vscode markdownlint extension.

Misspell check

In addition, please make sure to clean up typos before you submit the change.

To check for typos, use

# Golang is needed for the misspell tool.
make install-misspell
make misspell

To quickly fix typos, use

make misspell-correction

Pull Requests

How to create a PR

Everyone is welcome to contribute to the OpenTelemetry specification via GitHub pull requests (PRs).

To create a new PR, fork the project in GitHub and clone the upstream repo:

git clone https://github.com/open-telemetry/opentelemetry-specification.git

Add your fork as a remote:

git remote add fork https://github.com/YOUR_GITHUB_USERNAME/opentelemetry-specification.git

Check out a new branch, make modifications and push the branch to your fork:

$ git checkout -b feature
# edit files
$ git commit
$ git push fork feature

Open a pull request against the main opentelemetry-specification repo.

If the PR is not ready for review, please mark it as draft.

For non-trivial changes, please update the CHANGELOG.

Please make sure CLA is signed and CI is clear. We don't expect people to review and comment on a PR that doesn't have CLA signed.

How to get your PR merged

A PR is considered to be ready to merge when:

  • It has received more than two approvals from the code owners (if approvals are from only one company, they won't count).
  • There is no request changes from the code owners.
  • It has been at least two working days since the last modification (except for the trivial updates, such like typo, cosmetic, rebase, etc.). This gives people reasonable time to review.
  • Trivial changes (typos, cosmetic changes, CI improvements, etc.) don't have to wait for two days.

Any spec maintainer can merge the PR once it is ready to merge.

If a PR has been stuck (e.g. there are lots of debates and people couldn't agree on each other), the owner should try to get people aligned by:

  • Consolidating the perspectives and putting a summary in the PR. It is recommended to add a link into the PR description, which points to a comment with a summary in the PR conversation.
  • Tagging subdomain experts (by looking at the change history) in the PR asking for suggestion.
  • Reaching out to more people on the CNCF OpenTelemetry Slack channel. If you are new, you can create a CNCF Slack account here.
  • Stepping back to see if it makes sense to narrow down the scope of the PR or split it up.

If none of the above worked and the PR has been stuck for more than 2 weeks, the owner should bring it to the OpenTelemetry Specification SIG meeting.