https://www.wulaoer.org/?p=3084
[root@clinent ~]# wget https://github.com/actiontech/dble/releases/download/3.23.08.0%2Ftag/dble-3.23.08.0-20231102044353-linux.tar.gz [root@clinent ~]# tar -zxf dble-3.23.08.0-20231102044353-java1.8.0_352-linux.tar.gz [root@clinent ~]# mv dble /usr/local/
下载好了dble，并且放到指定的目录下了，下面看一下dble的配置文件和配置方法。在dble中有一个conf目录，这个目录就是存放配置文件的。
[root@clinent dble]# ls conf/ bootstrap.dynamic.cnf cluster_template.cnf ehcache.xml partition-number-range.txt sequence_db_conf.properties user_template.xml bootstrap_template.cnf dbseq.sql log4j2.xml partition-pattern.txt sharding_template.xml cacheservice.properties db_template.xml partition-enum.txt sequence_conf.properties template_table.sql
在conf目录下，其中
[root@clinent conf]# cp cluster_template.cnf cluster.cnf #集群配置文件 [root@clinent conf]# cp db_template.xml db.xml #数据库配置文件 [root@clinent conf]# cp bootstrap_template.cnf bootstrap.cnf #dble配置文件 [root@clinent conf]# cp user_template.xml user.xml #用户配置文件
这里我们不是部署的dble集群，所以集群配置文件不需要修改即可，这里主要是db.xml和user.xml两个文件。因为dble也是基于java环境的，所以我们需要安装一下java环境，然后在配置dble看看。
[root@client ~]# vim /etc/profile ................... export JAVA_HOME=/usr/local/jdk export CLASSPATH=.:${JAVA_HOME}/jre/lib/rt.jar:${JAVA_HOME}/lib/dt.jar:${JAVA_HOME}/lib/tools.jar export PATH=$PATH:${JAVA_HOME}/bin [root@client ~]# yum -y install java-1.8.0-openjdk java-1.8.0-openjdk-devel
下面看一下dble的配置，因为我的mysql是8.0的，dble的默认配置文件是5.7的，所以需要修改bootstrap.cnf
[root@client ~]# cd /usr/local/dble/ [root@client dble]# vim conf/bootstrap.cnf ..................... -DfakeMySQLVersion=8.0.33 .................... [root@client dble]# cat conf/db.xml <?xml version="1.0"?> <!-- ~ Copyright (C) 2016-2023 ActionTech. ~ License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher. --> <dble:db xmlns:dble="http://dble.cloud/" version="4.0"> <dbGroup name="dw_dble" rwSplitMode="1" delayThreshold="100"> #rwSplitMode等于0是不做负载均衡直接发到主实例，1是读操作在所有从实例中均衡，当所有实例不可用时报错，在v3.20.10版本之前会发往主实例。2读操作在所有实例中均衡 <heartbeat>show slave status</heartbeat> <dbInstance name="instanceM1" url="192.168.6.73:3306" user="root" password="root" maxCon="1000" minCon="10" primary="true"/> <dbInstance name="instanceS1" url="192.168.6.74:3306" user="root" password="root" maxCon="1000" minCon="10" readWeight="1"/> </dbGroup> </dble:db> [root@client dble]# cat conf/user.xml <?xml version="1.0" encoding="UTF-8"?> <!-- ~ Copyright (C) 2016-2023 ActionTech. ~ License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher. --> <!-- - - Licensed 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. --> <dble:user xmlns:dble="http://dble.cloud/" version="4.0"> <managerUser name="man1" password="654321" maxCon="100"/> <rwSplitUser name="rwsu1" password="123456" dbGroup="dw_dble" maxCon="20"/> </dble:user>
注意，我这里的73是主服务，74是从服务，也就是mysql的一主一从读写分离。如果多从直接增加dbInstance即可，可以使用同一个group引用，后面的user就是dble的管理用户，rwSplitUser是管理数据库的，managerUser是管理dble的。下面我们启动一下dble，看看是否可以查询到数据库，并写入数据；
[root@client dble]# ./bin/dble start Starting dble-server... dble-server is already running. [root@client dble]# mysql -uman1 -p -h127.0.0.1 -P9066 Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 5 Server version: 8.0.33-dble-3.23.08.0-375c9961af1c54ffb9122b21c5eb5434d39bbd64-20231102044353 dble Server (ActionTech) Copyright (c) 2000, 2024, Oracle and/or its affiliates. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> show @@dbinstance; +----------+------------+--------------+------+------+--------+------+------+-----------+------------+----------+ | DB_GROUP | NAME | HOST | PORT | W/R | ACTIVE | IDLE | SIZE | READ_LOAD | WRITE_LOAD | DISABLED | +----------+------------+--------------+------+------+--------+------+------+-----------+------------+----------+ | dw_dble | instanceS1 | 192.168.6.74 | 3306 | R | 0 | 10 | 1000 | 3 | 0 | false | | dw_dble | instanceM1 | 192.168.6.73 | 3306 | W | 0 | 10 | 1000 | 4 | 0 | false | +----------+------------+--------------+------+------+--------+------+------+-----------+------------+----------+ 2 rows in set (0.01 sec) [root@client dble]# mysql -urwsu1 -p -h127.0.0.1 -P8066 Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 6 Server version: 8.0.33-dble-3.23.08.0-375c9961af1c54ffb9122b21c5eb5434d39bbd64-20231102044353 MySQL Community Server - GPL Copyright (c) 2000, 2024, Oracle and/or its affiliates. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | sys | | wolf | | wulaoer | +--------------------+ 7 rows in set (0.00 sec)
下面验证一下读写分离的效果，我们通过dble往数据库里创建一个表，然后往表里插入数据，然后通过dble进行查看。
[root@client dble]# mysql -urwsu1 -p -h127.0.0.1 -P8066 Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 6 Server version: 8.0.33-dble-3.23.08.0-375c9961af1c54ffb9122b21c5eb5434d39bbd64-20231102044353 MySQL Community Server - GPL Copyright (c) 2000, 2024, Oracle and/or its affiliates. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> use wulaoer Database changed mysql> CREATE TABLE test_table ( -> id INT AUTO_INCREMENT PRIMARY KEY, -> value VARCHAR(255) NOT NULL -> ); Query OK, 0 rows affected (0.03 sec) mysql> DELIMITER $$ mysql> mysql> CREATE PROCEDURE insert_data() -> BEGIN -> DECLARE i INT DEFAULT 1; -> WHILE i <= 1000 DO -> INSERT INTO test_table (value) VALUES (CONCAT('Value ', i)); -> SET i = i + 1; -> END WHILE; -> END $$ Query OK, 0 rows affected (0.01 sec) mysql> mysql> DELIMITER ; mysql> mysql> CALL insert_data(); Query OK, 1 row affected (1.20 sec) mysql> SELECT COUNT(*) FROM test_table; +----------+ | COUNT(*) | +----------+ | 1000 | +----------+ 1 row in set (0.01 sec) mysql> SELECT * FROM test_table LIMIT 10; +----+----------+ | id | value | +----+----------+ | 1 | Value 1 | | 2 | Value 2 | | 3 | Value 3 | | 4 | Value 4 | | 5 | Value 5 | | 6 | Value 6 | | 7 | Value 7 | | 8 | Value 8 | | 9 | Value 9 | | 10 | Value 10 | +----+----------+ 10 rows in set (0.00 sec)
然后看一下73和74节点查看试一下数据是否一致，这里我就不验证了。这里在刚开始部署的时候发现，选择的是这个版本dble-3.22.07.0-20220915063524-java1.8.0_151-linux.tar.gz，但是启动的时候一直提示错误"These properties in bootstrap.cnf or bootstrap.dynamic.cnf are not recognized: java.specification.maintenance.version",但是我的配置文件bootstrap.cnf中就没有“ java.specification.maintenance.version”的配置，所以一直以为是我的配置错误，后来换到最新的版本同样的配置就可以正常启动了。好了，就先写到这吧。
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