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CONTRIBUTING.md

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How to contribute

etcd is Apache 2.0 licensed and accepts contributions via GitHub pull requests. This document outlines basics of contributing to etcd.

This is a rough outline of what a contributor's workflow looks like:

If you have any questions about, please reach out using one of the methods listed in contact.

Learn more about etcd

Before making a change please look through resources below to learn more about etcd and tools used for development.

Find something to work on

All the work in etcd project is tracked in github issue tracker. Issues should be properly labeled making it easy to find something for you.

Depending on your interest and experience you should check different labels:

  • If you are just starting, check issues labeled with good first issue.
  • When you feel more conformable in your contributions, checkout help wanted.
  • Advanced contributors can try to help with issues labeled priority/important covering most relevant work at the time.

If any of aforementioned labels don't have unassigned issues, please contact one of the maintainers asking to triage more issues.

Setup development environment

etcd supported development environments include only linux-amd64. Bug reports for any non-supported environments will be ignored. Supporting new environments requires introduction of proper tests and maintainer support that is currently lacking in etcd project. If you want help etcd support your preferred environment, please file an issue.

Setup environment:

  • Clone the repository
  • Install Go by following installation. Please check minimal go version in go.mod file.
  • Install build tools (make):
    • For ubuntu and debian run sudo apt-get install build-essential
  • Verify that everything is installed by running make build

Note: make build runs with -v. Other build flags can be added through env GO_BUILD_FLAGS, if required. Eg.,

GO_BUILD_FLAGS="-buildmode=pie" make build

Implement your change

etcd code should follow coding style suggested by the Golang community. See the style doc for details.

Please ensure that your change passes static analysis (requires golangci-lint):

  • make verify to verify if all checks pass.
  • make verify-* to verify a single check, for example make verify-bom to verify if bill-of-materials.json file is up-to-date.
  • make fix to fix all checks.
  • make fix-* to fix a single checks, for example make fix-bom to update bill-of-materials.json.

Please ensure that your change passes tests.

  • make test-unit to run unit tests.
  • make test-integration to run integration tests.
  • make test-e2e to run e2e tests.

All changes are expected to come with unit test. All new features are expected to have either e2e or integration tests.

Commit your change

etcd follows a rough convention for commit messages:

  • First line:
    • Should start name of package (for example etcdserver, etcdctl) followed by : character.
    • Describe the what behind the change
  • Optionally author might provide the why behind the change in the main commit message body.
  • Last line should be Signed-off-by: firstname lastname <[email protected]> (can be automatically generate by providing --signoff to git commit command).

Example of commit message:

etcdserver: add grpc interceptor to log info on incoming requests

To improve debuggability of etcd v3. Added a grpc interceptor to log
info on incoming requests to etcd server. The log output includes
remote client info, request content (with value field redacted), request
handling latency, response size, etc. Uses zap logger if available,
otherwise uses capnslog.

Signed-off-by: FirstName LastName <[email protected]>

Create a pull request

Please follow making a pull request guide.

If you are still working on the pull request, you can convert it to draft by clicking Convert to draft link just below list of reviewers.

Multiple small PRs are preferred over single large ones (>500 lines of code).

Get your pull request reviewed

Before requesting review please ensure that all GitHub checks were successful. It might happen that some unrelated tests on your PR are failing, due to their flakiness. In such cases please file an issue to deflake the problematic test and ask one of maintainers to rerun the tests.

If all checks were successful feel free to reach out for review from people that were involved in the original discussion or maintainers. Depending on complexity of the PR it might require between 1 and 2 maintainers to approve your change before merging.

Thanks for contributing!