7、ShardingSphere 之 Sharding-Proxy

簡介

定位爲透明化的數據庫代理端，提供封裝了數據庫二進制協議的服務端版本，用於完成對異構語言的支持。 目前先提供MySQL/PostgreSQL版本，它可以使用任何兼容MySQL/PostgreSQL協議的訪問客戶端(如：MySQL Command Client, MySQL Workbench, Navicat等)操作數據，對DBA更加友好。
嚮應用程序完全透明，可直接當做MySQL/PostgreSQL使用。
適用於任何兼容MySQL/PostgreSQL協議的的客戶端。

1 進入conf目錄，修改server.yaml

authentication:
  users:
    root:
      password: root
    sharding:
      password: sharding 
      authorizedSchemas: sharding_db

props:
  max.connections.size.per.query: 1
  acceptor.size: 16  # The default value is available processors count * 2.
  executor.size: 16  # Infinite by default.
  proxy.frontend.flush.threshold: 128  # The default value is 128.
    # LOCAL: Proxy will run with LOCAL transaction.
    # XA: Proxy will run with XA transaction.
    # BASE: Proxy will run with B.A.S.E transaction.
  proxy.transaction.type: LOCAL
  proxy.opentracing.enabled: false
  query.with.cipher.column: true
  sql.show: false

2 進入conf目錄，修改config-sharding.yaml

2.1 拷貝mysql驅動到Sharding-Proxy的lib目錄

將mysql 驅動 mysql-connector-java-8.0.15.jar 複製到Sharding-Proxy的lib目錄中

2.2 修改 config-sharding.yaml 文件

schemaName: sharding_db

dataSources:
  ds_0:
    url: jdbc:mysql://127.0.0.1:3306/edu1?serverTimezone=UTC&useSSL=false
    username: root
    password: chengwen
    connectionTimeoutMilliseconds: 30000
    idleTimeoutMilliseconds: 60000
    maxLifetimeMilliseconds: 1800000
    maxPoolSize: 50

shardingRule:
  tables:
    t_order:
      actualDataNodes: ds_${0}.t_order_${0..1}
      tableStrategy:
        inline:
          shardingColumn: order_id
          algorithmExpression: t_order_${order_id % 2}
      keyGenerator:
        type: SNOWFLAKE
        column: order_id
  bindingTables:
    - t_order
  defaultDatabaseStrategy:
    inline:
      shardingColumn: user_id
      algorithmExpression: ds_${0}
  defaultTableStrategy:
    none:

2.3 本地創建一個數據庫

CREATE SCHEMA `edu1` DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci ;

3 啓動Sharding-Proxy服務

進入bin目錄，執行命令啓動Sharding-Proxy

chengwen@chengwen bin % ./start.sh 
Starting the Sharding-Proxy ...
Please check the STDOUT file: /Users/chengwen/apache-shardingsphere-incubating-4.0.1-sharding-proxy-bin/logs/stdout.log
chengwen@chengwen bin % 

查看日誌，出現端口號3307（默認），ACTIVE表示成功

[INFO ] 00:27:18.350 [nioEventLoopGroup-2-1] i.n.handler.logging.LoggingHandler - [id: 0x7014d160] REGISTERED
[INFO ] 00:27:18.352 [nioEventLoopGroup-2-1] i.n.handler.logging.LoggingHandler - [id: 0x7014d160] BIND: 0.0.0.0/0.0.0.0:3307
[INFO ] 00:27:18.355 [nioEventLoopGroup-2-1] i.n.handler.logging.LoggingHandler - [id: 0x7014d160, L:/0.0.0.0:3307] ACTIVE

4 通過Sharding-Proxy啓動端口進行連接

4.1 打開Navicat for Mysql 15 連接sharding-proxy

4.2 進行sql命令操作看到只有一個庫

4.3 在sharding_db庫中創建表

create table if not exists ds_0.t_order(
order_id bigint not null,
user_id int not null,
status varchar(50),
primary key(order_id)
);

4.4 向表中添加一條記錄

USE sharding_db;

show tables;

select * from t_order;

insert into t_order(order_id,user_id,status) values (11,1,'init');

select * from t_order;

5 回到本地3306端口數據庫中，看到已經創建好了表和添加了數據

本地庫edu1需要自己創建，數據表和數據記錄會由sharding-proxy自動創建