shardingsphere-Proxy 初次使用

概述

shardingsphere-proxy 使用代理，什么意思呢，就是我只要發送給代理例如，

select * from t_order where id = 1;

的查詢，而實際 shardingsphere-proxy 執行的分庫分表中的 ：

select * from t_order_0 where id = 1;
select * from t_order_1 where id = 1;

然后框架封裝結果返回給用戶。 分次測試環境 ： 數據庫（MySQL）, 操作系統（Window）

下載啟動

下載地址 ： https://mirror.bit.edu.cn/apache/shardingsphere/4.1.0/apache-shardingsphere-4.1.0-sharding-proxy-bin.tar.gz 下載完以后解壓需要注意一下，window 環境不要用 7z 等解壓工具（因為里面有些文件的文件名過長，解壓軟件會截斷），window 環境下 cmd ,然后執行 ：

  tar zxvf apache-shardingsphere-4.1.0-sharding-proxy-bin.tar.gz

然后修改 /config 中的兩個文件，我的 config-sharding.yaml 文件修改如下 ：

 #
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

######################################################################################################
# 
# Here you can configure the rules for the proxy.
# This example is configuration of sharding rule.
#   
# If you want to use sharding, please refer to this file; 
# if you want to use master-slave, please refer to the config-master_slave.yaml.
# 
######################################################################################################
#
#schemaName: sharding_db
#
#dataSources:
#  ds_0:
#    url: jdbc:postgresql://127.0.0.1:5432/demo_ds_0?serverTimezone=UTC&useSSL=false
#    username: postgres
#    password: postgres
#    connectionTimeoutMilliseconds: 30000
#    idleTimeoutMilliseconds: 60000
#    maxLifetimeMilliseconds: 1800000
#    maxPoolSize: 50
#  ds_1:
#    url: jdbc:postgresql://127.0.0.1:5432/demo_ds_1?serverTimezone=UTC&useSSL=false
#    username: postgres
#    password: postgres
#    connectionTimeoutMilliseconds: 30000
#    idleTimeoutMilliseconds: 60000
#    maxLifetimeMilliseconds: 1800000
#    maxPoolSize: 50
#
#shardingRule:
#  tables:
#    t_order:
#      actualDataNodes: ds_${0..1}.t_order_${0..1}
#      tableStrategy:
#        inline:
#          shardingColumn: order_id
#          algorithmExpression: t_order_${order_id % 2}
#      keyGenerator:
#        type: SNOWFLAKE
#        column: order_id
#    t_order_item:
#      actualDataNodes: ds_${0..1}.t_order_item_${0..1}
#      tableStrategy:
#        inline:
#          shardingColumn: order_id
#          algorithmExpression: t_order_item_${order_id % 2}
#      keyGenerator:
#        type: SNOWFLAKE
#        column: order_item_id
#  bindingTables:
#    - t_order,t_order_item
#  defaultDatabaseStrategy:
#    inline:
#      shardingColumn: user_id
#      algorithmExpression: ds_${user_id % 2}
#  defaultTableStrategy:
#    none:

######################################################################################################
#
# If you want to connect to MySQL, you should manually copy MySQL driver to lib directory.
#
######################################################################################################

schemaName: sharding_db

# 分庫分表的信息 
dataSources:
  ds_0:
    url: jdbc:mysql://127.0.0.1:3306/demo_ds_0?serverTimezone=UTC&useSSL=false
    username: root
    password: 12345678
    connectionTimeoutMilliseconds: 30000
    idleTimeoutMilliseconds: 60000
    maxLifetimeMilliseconds: 1800000
    maxPoolSize: 50
  ds_1:
    url: jdbc:mysql://127.0.0.1:3306/demo_ds_1?serverTimezone=UTC&useSSL=false
    username: root
    password: 12345678
    connectionTimeoutMilliseconds: 30000
    idleTimeoutMilliseconds: 60000
    maxLifetimeMilliseconds: 1800000
    maxPoolSize: 50

# 分片規則
shardingRule:
  tables:
    t_order:
      actualDataNodes: ds_${0..1}.t_order_${0..1}
      tableStrategy:
        inline:
          shardingColumn: order_id
          algorithmExpression: t_order_${order_id % 2}
      keyGenerator:
        type: SNOWFLAKE
        column: order_id
    t_order_item:
      actualDataNodes: ds_${0..1}.t_order_item_${0..1}
      tableStrategy:
        inline:
          shardingColumn: order_id
          algorithmExpression: t_order_item_${order_id % 2}
      keyGenerator:
        type: SNOWFLAKE
        column: order_item_id
  bindingTables:
    - t_order,t_order_item
  defaultDatabaseStrategy:
    inline:
      shardingColumn: user_id
      algorithmExpression: ds_${user_id % 2}
  defaultTableStrategy:
    none:

sever.yaml 文件 ：

#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

######################################################################################################
# 
# If you want to configure orchestration, authorization and proxy properties, please refer to this file.
# 
######################################################################################################
#
#orchestration:
#  orchestration_ds:
#    orchestrationType: registry_center,config_center,distributed_lock_manager
#    instanceType: zookeeper
#    serverLists: localhost:2181
#    namespace: orchestration
#    props:
#      overwrite: false
#      retryIntervalMilliseconds: 500
#      timeToLiveSeconds: 60
#      maxRetries: 3
#      operationTimeoutMilliseconds: 500
#
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
  proxy.hint.enabled: false
  query.with.cipher.column: true

# 這個屬性會打印sql 語句
  sql.show: true
# 該屬性會允許范圍查詢，默認為 false ,要是我們分庫分表是水平切分，可以想得到范圍查詢會像廣播去查每一個表，比較耗性能能。
  allow.range.query.with.inline.sharding: true

先在本地數據庫建立兩個分庫，分別是 ： demo_ds_0 和 demo_ds_1 ，運行項目，有可能會發現缺少 mysql-connect-java 依賴,去maven 倉庫找到jar 包扔到 lib 目錄下，然后在 bin 目錄啟動 start.bat ,啟動成功后，

然后打開本地數據庫賬號：root ,密碼 ： root ,端口號 ： 3307 ，發現了里面有個 sharding_db，然后執行下面的建表語句 ：

CREATE TABLE `t_order` (
  `order_id` bigint(20) NOT NULL AUTO_INCREMENT,
  `user_id` int(11) NOT NULL,
  `status` varchar(50) COLLATE utf8_bin DEFAULT NULL,
  PRIMARY KEY (`order_id`)
) ENGINE=InnoDB AUTO_INCREMENT=279205305122816001 DEFAULT CHARSET=utf8 COLLATE=utf8_bin;

然后再打開本地的 demo_ds_0 和 demo_ds_1 你會發現代理幫你創建好表了

然后再執行 ：

INSERT INTO `t_order` (`order_id`, `user_id`, `status`) VALUES (11, 0, '2');
INSERT INTO `t_order` (`order_id`, `user_id`, `status`) VALUES (12, 1, '2');
INSERT INTO `t_order` (`order_id`, `user_id`, `status`) VALUES (13, 0, '2');

你會發現對應的 demo_ds_0 和 demo_ds_1 數據庫已經有分片好的數據！

參考資料

• https://www.cnblogs.com/yeyongjian/p/10107078.html