一、基於lnmp配置gearman實現Redis和MySQL數據同步
我們本篇博客解決的就是:如何將mysql端修改的數據及時更新到rdis端,實現數據同步。
1、在server3上,解壓lib_mysqludf_json-master.zip
[root@server3 ~]# yum install unzip -y
[root@server3 ~]# ls
[root@server3 ~]# unzip lib_mysqludf_json-master.zip
2、安裝gcc
和mariadb-devel
,mariadb-devel和gcc不能同時安裝,同時安裝只會安裝其中一個。
[root@server3 ~]# cd lib_mysqludf_json-master
[root@server3 lib_mysqludf_json-master]# yum install gcc -y
[root@server3 lib_mysqludf_json-master]# yum install mariadb-devel -y
3、gcc進行編譯
[root@server3 lib_mysqludf_json-master]# gcc $(mysql_config --cflags) -shared -fPIC -o lib_mysqludf_json.so lib_mysqludf_json.c
4、將lib_mysqludf_json-master/lib_mysqludf_json.so
模塊拷貝到/usr/lib64/mysql/plugin/
插件目錄下
cp lib_mysqludf_json-master/lib_mysqludf_json.so /usr/lib64/mysql/plugin/
5、登陸數據庫,查看插件目錄
[root@server3 lib_mysqludf_json-master]# mysql -uroot -predhat
MariaDB [(none)]> show global variables like 'plugin_dir';
6、註冊udf函數,並查看。
MariaDB [(none)]> create FUNCTION json_object returns string soname 'lib_mysqludf_json.so';
MariaDB [(none)]> select * from mysql.func;
7、安裝libgearman安裝包,並安裝管理gearman的分佈式隊列插件,進行編譯和安裝
[root@server3 ~]# yum install libgearman-* libevent-devel-2.0.21-4.el7.x86_64.rpm -y
[root@server3 ~]# tar zxf gearman-mysql-udf-0.6.tar.gz
[root@server3 ~]# cd gearman-mysql-udf-0.6
[root@server3 gearman-mysql-udf-0.6]# ls
[root@server3 gearman-mysql-udf-0.6]# ./configure -libdir=/usr/lib64/mysql/plugin/ --with-mysql
[root@server3 gearman-mysql-udf-0.6]# make && make install
8、再次註冊兩個udf函數
MariaDB [(none)]> CREATE FUNCTION gman_do_background RETURNS STRING SONAME 'libgearman_mysql_udf.so';
MariaDB [(none)]> CREATE FUNCTION gman_servers_set RETURNS STRING SONAME 'libgearman_mysql_udf.so';
MariaDB [(none)]> select * from mysql.func;
9、指定gearman的服務信息
MariaDB [(none)]> select gman_servers_set('172.25.2.1:4730');
10、編寫mysql觸發器腳本test.sql,並導入test數據庫
[root@server3 ~]# vim test.sql
use test;
##註釋掉創建表的兩行
#CREATE TABLE `test` (`id` int(7) NOT NULL AUTO_INCREMENT, `name` char(8) DEFAULT NULL, PRIMARY KEY (`id`)) ENGINE=InnoDB DEFAULT CHARSET=utf8;
#INSERT INTO `test` VALUES (1,'test1'),(2,'test2'),(3,'test3'),(4,'test4'),(5,'test5'),(6,'test6'),(7,'test7'),(8,'test8'),(9,'test9');
DELIMITER $$
CREATE TRIGGER datatoredis AFTER UPDATE ON test FOR EACH ROW BEGIN
SET @RECV=gman_do_background('syncToRedis', json_object(NEW.id as `id`, NEW.name as `name`));
END$$
DELIMITER ;
[root@server3 ~]# mysql -predhat < test.sql
[root@server3 ~]# mysql -uroot -predhat
11、查看觸發器
MariaDB [(none)]> SHOW TRIGGERS FROM test;
12、在server1上(gman的worker端),開啓gearmand服務並查看其端口號4730是否開啓
[root@server1 ~]# systemctl start gearmand
[root@server1 ~]# netstat -tnlp
13、編寫worker.php
腳本,並放到/usr/local目錄下
[root@server1 ~]# vim worker.php
<?php
$worker = new GearmanWorker();
$worker->addServer();
$worker->addFunction('syncToRedis', 'syncToRedis');
$redis = new Redis();
$redis->connect('172.25.2.2', 6379);
while($worker->work());
function syncToRedis($job)
{
global $redis;
$workString = $job->workload();
$work = json_decode($workString);
if(!isset($work->id)){
return false;
}
$redis->set($work->id, $work->name);
}
?>
[root@server1 ~]# cp worker.php /usr/lcoal/
14、在後臺運行worker
[root@server1 ~]# nohup php /usr/local/worker.php &> /dev/null &
15、測試,在server3更新數據並查看(注意:其中id=1的因爲是之前更改的,所以不生效)
MariaDB [(none)]> use test;
MariaDB [test]> update test set name='ranran' where id=2;
MariaDB [test]> select * from test;
MariaDB [test]> update test set name='qiuqiu' where id=3;
在server2嘗試獲取,發生改變
[root@server2 redis-5.0.3]# redis-cli
127.0.0.1:6379> get 2
127.0.0.1:6379> get 3
在瀏覽器中查看,看到發生改變
此時,就實現了Redis和MySQL數據同步了。