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horgh-replicator's Introduction

Mysql binlog replicator

Site

See full docs here

Master types

  • MySQL

Slave types

  • MySQL
  • PostgreSQL
  • Yandex ClickHouse
  • HP Vertica

Quick start

See quick start tutorial here

Testing

  • Copy src/.env.dist to src/.env and set credentials.
  • Configure your my MySQL master as examples/master/mysql.conf. Don't forget to set binlog_do_db=<master_db_name> and restart MySQL service.
  • Create databases and tables as examples/sql/.
  • Start Docker as make start-dev
  • Run as cd src and go run main.go listen in docker container.
  • Copy examples/configs/user.json and examples/configs/post.json to src/system/configs
  • Execute cd src and go run main.go load

Add tables to replicator

  • Use create-model <table> to create json config for your table.
  • Create table on slave.
  • Set <table> to TABLE param in src/.env
  • Use build-slave to copy table data from master and set start position of log for table listener.

Custom handlers for field value

  • Create plugins/user/<plugin_name>/handler.go like plugins/system/set_value/handler.go
  • Execute go build -buildmode=plugin -o plugins/user/<plugin_name>/handler.so plugins/user/<plugin_name>/handler.go
  • Add to field description in your src/system/configs/<model>.json
"beforeSave": {
  "handler": "user/<plugin_name>",
  "params": [
    "***"
  ]
}
System handlers
  • If you want to set custom field value use system/set_value as handler param. Don't forget to set params: ["<value>"]

Tools

  • set-position <table> <binlog_name> <binlog_position> set start position of log for table listener
  • load start loader for replication testing (for default tables user and post)
  • create-model <table> create model json-file by master table structure
  • build-slave create master table dump, restore this dump in slave, set start position of log for table listener
  • destroy-slave truncate table, set empty position of log for table listener

Modes

  • Prod mode: build app and execute listener.

    Use make build-prod and make start-prod to start and make stop-prod to stop.

  • Dev mode: provides the opportunity for manual start and debug.

    Use make start-dev to start and make stop-dev to stop.

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