GoFlake

Goflake is a disributed uuid generator. By default it uses SnowFlake configuration.

Goflake comes with both grpc and http servers so you can use it in your own applications without any additional dependencies (including TLS).

See announcing snowflake by Twitter.

Install

go install github.com/Avielyo10/goflake@latest

Configuration

Goflake will try to read configuration from /etc/goflake/config.yaml or $CWD/config.yaml if it exists, else default will apply. You can also specify configuration from environment variables to override configuration from file.

For example:

env "SERVER.TYPE=rest" DATACENTER_ID=1 MACHINE_ID=2 go run .

Configuration File in detail

• log_level: either debug, info, warn, error, fatal

• env: either development, production

• datacenter_id: can be 0 - 2 ^ flake.bits_len.datacenter_id - 1

• machine_id: can be 0 - 2 ^ flake.bits_len.machine_id - 1

• flake configuration

  • bits_len: bits length of flake id, needs to sum to 63 (1 bit for sign)
    • datacenter_id: uint64, default 5
    • machine_id: uint64, default 5
    • sequence: uint64, default 12
    • time: uint64, default 41
  • epoch: epoch of flake id, default is Thu Jul 28 2022 18:57:35 UTC
  • tick_ms: tick interval in milliseconds to set sequence to 0, default is 1ms

• server configuration

  • host: server host
  • port: server port
  • tls configuration
    • cert_path: path to certificate file
    • key_path: path to key file
  • type: either grpc, rest

See example config