mirror/merlin/README.md

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# Merlin
[![Build Status](https://ci.csclub.uwaterloo.ca/api/badges/public/mirror/status.svg)](https://ci.csclub.uwaterloo.ca/public/mirror)
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This folder contains the code for merlin (which does the actual syncing) and arthur (which sends commands to merlin).
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Check out the the [mirror env](https://git.csclub.uwaterloo.ca/public/mirror-env) for a testing environment
### Usage
```
go build merlin.go
```
Then configure `merlin-config.ini` and run using `./merlin`
### Nice Features To Add
- detect if an rsync process is stuck (watch the stdout/stderr of the rsync processes)
- get the config or the rsync commond that a repo will sync with using a cli tool
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- improve conversion from exit status enum to string
- sort `arthur status` by last time synced
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- last sync runtime, time until next sync
- when sync fails, then make a copy of the rsync logs
### Completed
- [x] add bwlimit option for each rsync process
- [x] write process manager
- [x] save state (last attempted time, last attempted status) for each repo, and restore state on startup (e.g. use JSON/INI file for each repo)
- [x] calculate difference between the scheduled time of a job and the time at which it actually ran; log this
- [x] add all repos to merlin-config.ini (\*)
- [x] handle termination signals in merlin (SIGINT, SIGTERM); close stopChan for this
- [x] listen on Unix socket in merlin
- [x] implement arthur.go (commands: sync and status)
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- [x] allow dynamic reloading in merlin
- [x] use separate log file for each child process (currently sharing stdout/stderr with parent)
- [x] implement zfssync in merlin (just invoke the existing Python script)