94 lines
4.2 KiB
Markdown
94 lines
4.2 KiB
Markdown
# Chihaya [](https://travis-ci.org/chihaya/chihaya)
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Chihaya is a high-performance [BitTorrent tracker] written in the Go
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programming language. It is still heavily under development and the current
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`master` branch should probably not be used in production
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(unless you know what you're doing).
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Features include:
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- Public tracker feature-set with full compatibility with what exists of the BitTorrent spec
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- Private tracker feature-set with compatibility for a [Gazelle]-like deployment (WIP)
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- Low resource consumption, and fast, asynchronous request processing
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- Full IPv6 support, including handling for dual-stacked peers
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- Extensive metrics for visibility into the tracker and swarm's performance
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- Ability to prioritize peers in local subnets to reduce backbone contention
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- Pluggable backend driver that can coordinate with an external database
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[BitTorrent tracker]: http://en.wikipedia.org/wiki/BitTorrent_tracker
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[gazelle]: https://github.com/whatcd/gazelle
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## When would I use Chihaya?
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Chihaya is a meant for every kind of BitTorrent tracker deployment. Chihaya has
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been used to replace instances of [opentracker] and also instances of [ocelot].
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Chihaya handles torrent announces and scrapes in memory, but using a backend
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driver, can also asynchronously provide deltas to maintain a set of persistent
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data without throttling a database (this most useful for private tracker
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use-cases).
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[opentracker]: http://erdgeist.org/arts/software/opentracker
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[ocelot]: https://github.com/WhatCD/Ocelot
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## Building & Installing
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Chihaya requires Go 1.4, [Godep], and a [Go environment] previously setup.
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[Godep]: https://github.com/tools/godep
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[Go environment]: https://golang.org/doc/code.html
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```sh
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$ export GOPATH=$PWD/chihaya
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$ git clone github.com/chihaya/chihaya chihaya/src/github.com/chihaya/chihaya
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$ godep go install chihaya/src/github.com/chihaya/cmd/chihaya
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```
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### Testing
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Chihaya has end-to-end test coverage for announces in addition to unit tests for
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isolated components. To run the tests, use:
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```sh
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$ cd $GOPATH/src/github.com/chihaya/chihaya
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$ godep go test -v ./...
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```
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There is also a set of benchmarks for performance-critical sections of Chihaya.
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These can be run similarly:
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```sh
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$ cd $GOPATH/src/github.com/chihaya/chihaya
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$ godep go test -v ./... -bench .
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```
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## Configuration
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Copy [`example_config.json`](https://github.com/chihaya/chihaya/blob/master/example_config.json)
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to your choice of location, and update the values as required.
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The available keys and their default values are as follows:
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- `private_enabled: false` – if this is a private tracker
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- `freeleech_enabled: false` – for private trackers, whether download stats should be counted for users
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- `purge_inactive_torrents: true` – if torrents should be forgotten after some time
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- `announce: "30m"` – the announce "interval" value sent to clients
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- `min_announce: "15m"` – the announce "min_interval" value sent to clients
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- `default_num_want: 50` – the default number of peers to return if the client has not specified
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- `torrent_map_shards: 1` – number of torrent maps to use (leave this at 1 in general)
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- `allow_ip_spoofing: true` – if peers are allowed to set their own IP, this must be enabled for dual-stack IP support
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- `dual_stacked_peers: true` – if peers may have both an IPv4 and IPv6 address, otherwise only one IP per peer will be used
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- `real_ip_header: ""` – optionally an HTTP header where the upstream IP is stored, for example `X-Forwarded-For` or `X-Real-IP`
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- `respect_af: false` – if responses should only include peers of the same address family as the announcing peer
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- `client_whitelist_enabled: false` – if peer IDs should be matched against the whitelist
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- `client_whitelist: []` – list of peer ID prefixes to allow
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- `http_listen_addr: ""` – listen address for the HTTP server
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- `http_request_timeout: "10s"`
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- `http_read_timeout: "10s"`
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- `http_write_timeout: "10s"`
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- `http_listen_limit: 0`
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- `udp_listen_addr: ""` – listen address for the UDP server
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- `udp_read_buffer_size: undefined` – size of the UDP socket's kernel read buffer
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- `driver: "noop"`
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- `stats_buffer_size: 0`
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- `include_mem_stats: true`
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- `verbose_mem_stats: false`
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- `mem_stats_interval: "5s"`
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