mirror of
https://github.com/zrepl/zrepl.git
synced 2024-11-22 16:34:32 +01:00
92 lines
4.1 KiB
Markdown
92 lines
4.1 KiB
Markdown
# zrepl
|
|
zrepl is a ZFS filesystem backup & replication solution written in Go.
|
|
|
|
## User Documentation
|
|
|
|
**User Documentation** can be found at [zrepl.github.io](https://zrepl.github.io).
|
|
|
|
## Bug Reports
|
|
|
|
1. If the issue is reproducible, enable debug logging, reproduce and capture the log.
|
|
2. Open an issue on GitHub, with logs pasted as GitHub gists / inline.
|
|
|
|
## Feature Requests
|
|
|
|
1. Does you feature request require default values / some kind of configuration?
|
|
If so, think of an expressive configuration example.
|
|
2. Think of at least one use case that generalizes from your concrete application.
|
|
3. Open an issue on GitHub with example conf & use case attached.
|
|
|
|
The above does not apply if you already implemented everything.
|
|
Check out the *Coding Workflow* section below for details.
|
|
|
|
## Package Maintainer Information
|
|
|
|
* Follow the steps in `docs/installation.rst -> Compiling from Source` and read the Makefile / shell scripts used in this process.
|
|
* Make sure your distro is compatible with the paths in `docs/installation.rst`.
|
|
* Ship a default config that adheres to your distro's `hier` and logging system.
|
|
* Ship a service manager file and _please_ try to upstream it to this repository.
|
|
* Use `make release ZREPL_VERSION='mydistro-1.2.3_1'`
|
|
* Your distro's name and any versioning supplemental to zrepl's (e.g. package revision) should be in this string
|
|
* Make sure you are informed about new zrepl versions, e.g. by subscribing to GitHub's release RSS feed.
|
|
|
|
## Developer Documentation
|
|
|
|
First, use `./lazy.sh devsetup` to install build dependencies and read `docs/installation.rst -> Compiling from Source`.
|
|
|
|
### Overall Architecture
|
|
|
|
The application architecture is documented as part of the user docs in the *Implementation* section (`docs/content/impl`).
|
|
Make sure to develop an understanding how zrepl is typically used by studying the user docs first.
|
|
|
|
### Project Structure
|
|
|
|
```
|
|
├── cmd
|
|
│ ├── endpoint # implementations of endpoints for package replication
|
|
│ ├── sampleconf # example configuration
|
|
├── docs # sphinx-based documentation
|
|
│ ├── **/*.rst # documentation in reStructuredText
|
|
│ ├── sphinxconf
|
|
│ │ └── conf.py # sphinx config (see commit 445a280 why its not in docs/)
|
|
│ ├── requirements.txt # pip3 requirements to build documentation
|
|
│ ├── publish.sh # shell script for automated rendering & deploy to zrepl.github.io repo
|
|
│ ├── public_git # checkout of zrepl.github.io managed by above shell script
|
|
├── logger # logger package used by zrepl
|
|
├── replication # replication functionality
|
|
├── rpc # rpc protocol implementation
|
|
├── util
|
|
└── zfs # ZFS wrappers, filesystemm diffing
|
|
```
|
|
|
|
### Coding Workflow
|
|
|
|
* Open an issue when starting to hack on a new feature
|
|
* Commits should reference the issue they are related to
|
|
* Docs improvements not documenting new features do not require an issue.
|
|
|
|
### Breaking Changes
|
|
|
|
Backward-incompatible changes must be documented in the git commit message and are listed in `docs/changelog.rst`.
|
|
|
|
* Config-breaking changes must contain a line `BREAK CONFIG` in the commit message
|
|
* Other breaking changes must contain a line `BREAK` in the commit message
|
|
|
|
### Glossary & Naming Inconsistencies
|
|
|
|
In ZFS, *dataset* refers to the objects *filesystem*, *ZVOL* and *snapshot*. <br />
|
|
However, we need a word for *filesystem* & *ZVOL* but not a snapshot, bookmark, etc.
|
|
|
|
Toward the user, the following terminology is used:
|
|
|
|
* **filesystem**: a ZFS filesystem or a ZVOL
|
|
* **filesystem version**: a ZFS snapshot or a bookmark
|
|
|
|
Sadly, the zrepl implementation is inconsistent in its use of these words:
|
|
variables and types are often named *dataset* when they in fact refer to a *filesystem*.
|
|
|
|
There will not be a big refactoring (an attempt was made, but it's destroying too much history without much gain).
|
|
|
|
However, new contributions & patches should fix naming without further notice in the commit message.
|
|
|