Reflector

Reflector is a central piece of software that providers LBRY with the following features:

• Blobs reflection: when something is published, we capture the data and store it on our servers for quicker retrieval
• Blobs distribution: when a piece of content is requested and the LBRY network doesn't have it, reflector will retrieve it from its storage and distribute it
• Blobs caching: reflectors can be chained together in multiple regions or servers to form a chain of cached content. We call those "blobcaches". They are layered so that content distribution is favorable in all the regions we deploy it to

There are a few other features embedded in reflector.go including publishing streams from Go, downloading or upload blobs, resolving content and more unfinished tools.

This code includes a Go implementations of the LBRY peer protocol, reflector protocol, and DHT.

Installation

• Install mysql 8 (5.7 might work too)
• add a reflector user and database with password reflector with localhost access only
• Create the tables as described here (the link might not update as the code does so just look for the schema in that file)

We do not support running reflector.go as a blob receiver, however if you want to run it as a private blobcache you may compile it yourself and run it as following:

./prism-bin reflector \
--conf="none" \
--disable-uploads=true \
--use-db=false \
--upstream-reflector="reflector.lbry.com" \
--upstream-protocol="http" \
--request-queue-size=200 \
--disk-cache="2GB:/path/to/your/storage/:localdb" \

Create a systemd script if you want to run it automatically on startup or as a service.

Usage

Usage as reflector/blobcache:

Run reflector server

Usage:
  prism reflector [flags]

Flags:
      --disable-blocklist                 Disable blocklist watching/updating
      --disable-uploads                   Disable uploads to this reflector server
      --disk-cache string                 Where to cache blobs on the file system. format is 'sizeGB:CACHE_PATH:cachemanager' (cachemanagers: localdb/lfuda/lru) (default "100GB:/tmp/downloaded_blobs:localdb")
  -h, --help                              help for reflector
      --http-peer-port int                The port reflector will distribute content from over HTTP protocol (default 5569)
      --http3-peer-port int               The port reflector will distribute content from over HTTP3 protocol (default 5568)
      --mem-cache int                     enable in-memory cache with a max size of this many blobs
      --metrics-port int                  The port reflector will use for prometheus metrics (default 2112)
      --optional-disk-cache string        Optional secondary file system cache for blobs. format is 'sizeGB:CACHE_PATH:cachemanager' (cachemanagers: localdb/lfuda/lru) (this would get hit before the one specified in disk-cache)
      --origin-endpoint string            HTTP edge endpoint for standard HTTP retrieval
      --origin-endpoint-fallback string   HTTP edge endpoint for standard HTTP retrieval if first origin fails
      --receiver-port int                 The port reflector will receive content from (default 5566)
      --request-queue-size int            How many concurrent requests from downstream should be handled at once (the rest will wait) (default 200)
      --tcp-peer-port int                 The port reflector will distribute content from for the TCP (LBRY) protocol (default 5567)
      --upstream-protocol string          protocol used to fetch blobs from another upstream reflector server (tcp/http3/http) (default "http")
      --upstream-reflector string         host:port of a reflector server where blobs are fetched from
      --use-db                            Whether to connect to the reflector db or not (default true)

Global Flags:
      --conf string       Path to config. Use 'none' to disable (default "config.json")
  -v, --verbose strings   Verbose logging for specific components

Other uses:

Prism is a single entry point application with multiple sub modules which can be leveraged individually or together

Usage:
  prism [command]

Available Commands:
  check-integrity check blobs integrity for a given path
  cluster         Start(join) to or Start a new cluster
  decode          Decode a claim value
  dht             Run dht node
  getstream       Get a stream from a reflector server
  help            Help about any command
  peer            Run peer server
  populate-db     populate local database with blobs from a disk storage
  publish         Publish a file
  reflector       Run reflector server
  resolve         Resolve a URL
  send            Send a file to a reflector
  sendblob        Send a random blob to a reflector server
  start           Runs full prism application with cluster, dht, peer server, and reflector server.
  test            Test things
  upload          Upload blobs to S3
  version         Print the version

Flags:
      --conf string       Path to config. Use 'none' to disable (default "config.json")
  -h, --help              help for prism
  -v, --verbose strings   Verbose logging for specific components

Running from Source

This project requires Go v1.16.

On Ubuntu you can install it with sudo snap install go --classic

git clone git@github.com:lbryio/reflector.go.git
cd reflector.go
make
./bin/prism-bin

Contributing

coming soon

License

This project is MIT licensed.

Security

We take security seriously. Please contact security@lbry.com regarding any security issues. Our PGP key is here if you need it.

Contact

The primary contact for this project is @Nikooo777 (niko-at-lbry.com)