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118 lines
6.4 KiB
Markdown
118 lines
6.4 KiB
Markdown
[](https://github.com/zrepl/zrepl/blob/master/LICENSE)
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[](https://golang.org/)
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[](https://zrepl.github.io)
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[](https://patreon.com/zrepl)
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[](https://github.com/sponsors/problame)
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[](https://liberapay.com/zrepl/donate)
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[](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=R5QSXJVYHGX96)
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[](https://twitter.com/intent/tweet?text=Wow:&url=https%3A%2F%2Fgithub.com%2Fzrepl%2Fzrepl)
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[](https://matrix.to/#/#zrepl:matrix.org)
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# zrepl
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zrepl is a one-stop ZFS backup & replication solution.
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## User Documentation
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**User Documentation** can be found at [zrepl.github.io](https://zrepl.github.io).
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## Bug Reports
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1. If the issue is reproducible, enable debug logging, reproduce and capture the log.
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2. Open an issue on GitHub, with logs pasted as GitHub gists / inline.
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## Feature Requests
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1. Does your feature request require default values / some kind of configuration?
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If so, think of an expressive configuration example.
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2. Think of at least one use case that generalizes from your concrete application.
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3. Open an issue on GitHub with example conf & use case attached.
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4. **Optional**: [Contact Christian Schwarz](https://cschwarz.com) for contract work.
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The above does not apply if you already implemented everything.
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Check out the *Coding Workflow* section below for details.
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## Development
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zrepl is written in [Go](https://golang.org) and uses [Go modules](https://github.com/golang/go/wiki/Modules) to manage dependencies.
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The documentation is written in [ReStructured Text](http://docutils.sourceforge.net/rst.html) using the [Sphinx](https://www.sphinx-doc.org) framework.
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### Building
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#### Go Code
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Dependencies:
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* Go 1.22 or newer
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* GNU Make
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* Git
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* wget (`make generate`)
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* unzip (`make generate`)
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Some Go code is **generated**, and generated code is committed to the source tree.
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Therefore, building does not require having code generation tools set up.
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When making changes that require code to be (re-)generated, run `make generate`.
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I downloads and installs pinned versions of the code generation tools into `./build/install`.
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There is a CI check that ensures Git state is clean, i.e., code generation has been done by a PR and is deterministic.
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#### Docs
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Set up a Python environment that has `docs/requirements.txt` installed via `pip`.
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Use a [venv](https://docs.python.org/3/library/venv.html) to avoid global state.
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### Testing
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The **test suite** is split into pure **Go tests** (`make test-go`) and **platform tests** that interact with ZFS and thus generally **require root privileges** (`sudo make test-platform`).
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Platform tests run on their own pool with the name `zreplplatformtest`, which is created using the file vdev in `/tmp`.
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For a full **code coverage** profile, run `make test-go COVER=1 && sudo make test-platform && make cover-merge`.
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An HTML report can be generated using `make cover-html`.
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### Circle CI
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We use CircleCI for automated build & test pre- and post-merge.
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There are two workflows:
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* `ci` runs for every commit / branch / tag pushed to GitHub.
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It is supposed to run very fast (<5min and provides quick feedback to developers).
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It runs formatting checks, lints and tests on the most important OSes / architectures.
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* `release` runs
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* on manual triggers through the CircleCI API (in order to produce a release)
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* periodically on `master`
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Artifacts are stored in CircleCI.
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### Releasing
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Releases are issued via Git tags + GitHub Releases feature.
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The procedure to issue a release is as follows:
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* Issue the source release:
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* Git tag the release on the `master` branch.
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* Push the tag.
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* Run `./docs/publish.sh` to re-build & push zrepl.github.io.
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* Issue the official binary release:
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* Run the `release` pipeline (triggered via CircleCI API)
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* Download the artifacts to the release manager's machine.
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* Create a GitHub release, edit the changelog, upload all the release artifacts, including .rpm and .deb files.
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* Issue the GitHub release.
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* Add the .rpm and .deb files to the official zrepl repos.
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* Code for management of these repos: https://github.com/zrepl/package-repo-ops (private repo at this time)
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**Official binary releases are not re-built when Go receives an update. If the Go update is critical to zrepl (e.g. a Go security update that affects zrepl), we'd issue a new source release**.
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The rationale for this is that whereas distros provide a mechanism for this (`$zrepl_source_release-$distro_package_revision`), GitHub Releases doesn't which means we'd need to update the existing GitHub release's assets, which nobody would notice (no RSS feed updates, etc.).
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Downstream packagers can read the changelog to determine whether they want to push that minor release into their distro or simply skip it.
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## Notes to Distro Package Maintainers
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* The `Makefile` in this project is not suitable for builds in distros.
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* Run the platform tests (Docs -> Usage -> Platform Tests) **on a test system** to validate that zrepl's abstractions on top of ZFS work with the system ZFS.
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* Ship a default config that adheres to your distro's `hier` and logging system.
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* Ship a service manager file and _please_ try to upstream it to this repository.
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* `dist/systemd` contains a Systemd unit template.
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* Ship other material provided in `./dist`, e.g. in `/usr/share/zrepl/`.
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* Have a look at the `Makefile`'s `ZREPL_VERSION` variable and how it passed to Go's `ldFlags`.
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This is how `zrepl version` knows what version number to show.
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Your build system should set the `ldFlags` flags appropriately and add a prefix or suffix that indicates that the given zrepl binary is a distro build, not an official one.
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* Make sure you are informed about new zrepl versions, e.g. by subscribing to GitHub's release RSS feed.
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