一、拓扑图

本次实验搭建的为一台服务器上安装四个mysql实例,实现两主两从的结构;然后两个主mysql承接mycat写的操作,两个从mysql承接mycat读的操作,实现读写分离。同时,使用mycat-web连接mycat,实现对mycat性能的监控。

二、安装mysql

首先查看java版本

 mycat需要jdk1.7以上版本。

 

我用的mysql安装包为源码包,因为用免编译包可能会出现文件路径或权限各种没有的情况,做实验推荐用mysql5.5以前的版本,比较轻量,编译速度比较快,我用的5.1.73版本,先创建需要的路径:

使用命令:

cd /data
wget https://downloads.mysql.com/archives/get/file/mysql-5.1.73.tar.gz

 

进行下载

mkdir -p /data/3316/etc /data/3316/var /data/3316/log
mkdir -p /data/3317/etc /data/3317/var /data/3317/log
mkdir -p /data/3318/etc /data/3318/var /data/3318/log
mkdir -p /data/3319/etc /data/3319/var /data/3319/log
mkdir -p /tmp/mysql

 

创建mysql用户

groupadd mysql
useradd -r -g mysql mysql
chown -R mysql:mysql /data/3316
chown -R mysql:mysql /data/3317
chown -R mysql:mysql /data/3318
chown -R mysql:mysql /data/3319
chown -R mysql:mysql /tmp/mysql

 

编译配置:

cd /data #进入安装包路径
tar -xvf mysql-5.1.73.tar.gz
cd mysql-5.1.73
./configure --prefix=/data/3316 --sysconfdir=/data/3316/etc --with-tcp-port=3316 --localstatedir=/data/3316/var --with-unix-socket-path=/tmp/mysql/3316.sock --with-charset=utf8 --with-collation=utf8_general_ci --with-extra-charsets=gbk,gb2312,binary --enable-thread-safe-client --with-plugins=innobase --with-mysqld-user=mysql --with-charset=utf8 --with-client-ldflags=-all-static --with-mysqld-ldflags=-all-static
make && make install

然后初始化数据库,此步骤需在mysql_install_db文件的上层目录执行,不然会报错:

(scripts有的版本在解压包目录,有的在自己选的mysql安装目录)

scripts/mysql_install_db --user=mysql --basedir=/data/3316 --datadir=/data/3316/var --defaults-file=/data/3316/etc/my.cnf

scripts/mysql_install_db --user=mysql --basedir=/data/3316 --datadir=/data/3317/var --defaults-file=/data/3317/etc/my.cnf

scripts/mysql_install_db --user=mysql --basedir=/data/3316 --datadir=/data/3318/var --defaults-file=/data/3318/etc/my.cnf

scripts/mysql_install_db --user=mysql --basedir=/data/3316 --datadir=/data/3319/var --defaults-file=/data/3319/etc/my.cnf

 

 然后创建各个实例的配置文件:

touch /data/3316/etc/my.cnf
touch /data/3317/etc/my.cnf
touch /data/3318/etc/my.cnf
touch /data/3319/etc/my.cnf

 

打开文件

vi /data/3316/etc/my.cnf

把下列配置项复制进去

[client]
port            = 3316
socket          = /tmp/mysql/3316.sock

[mysql]
no-auto-rehash

[mysqld]
user    = mysql
port    = 3316
socket  = /tmp/mysql/3316.sock
basedir = /data/3316
datadir = /data/3316/var
open_files_limit    = 1024
back_log = 600
max_connections = 800
max_connect_errors = 3000
table_open_cache = 614
external-locking = FALSE
max_allowed_packet =8M
sort_buffer_size = 1M
join_buffer_size = 1M
thread_cache_size = 100
thread_concurrency = 2
query_cache_size = 2M
query_cache_limit = 1M
query_cache_min_res_unit = 2k
#default_table_type = InnoDB
thread_stack = 192K
#transaction_isolation = READ-COMMITTED
tmp_table_size = 2M
max_heap_table_size = 2M
#long_query_time = 1
#log_long_format
log-error = /data/3316/log/error.log
log-slow-queries = /data/3316/log/slow.log
pid-file = /tmp/mysql/3316.pid
log-bin = /data/3316/var/mysql-bin
#binlog-do-db = db1
#relay-log = /data/3316/log/relay-bin
#relay-log-info-file = /data/3316/log/relay-log.info
binlog_cache_size = 1M
max_binlog_cache_size = 1M
max_binlog_size = 2M
expire_logs_days = 7
key_buffer_size = 16M
read_buffer_size = 1M
read_rnd_buffer_size = 1M
bulk_insert_buffer_size = 1M
lower_case_table_names = 1
skip-name-resolve
binlog_format = mixed
slave-skip-errors = 1032,1062
replicate-ignore-db=mysql
server-id = 3316
innodb_additional_mem_pool_size = 4M
innodb_buffer_pool_size = 32M
innodb_data_file_path = ibdata1:128M:autoextend
innodb_file_io_threads = 4
innodb_thread_concurrency = 8
innodb_flush_log_at_trx_commit = 2
innodb_log_buffer_size = 2M
innodb_log_file_size = 4M
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 90
innodb_lock_wait_timeout = 120
innodb_file_per_table = 0
[mysqldump]
quick
max_allowed_packet = 2M

[mysqld_safe]
log-error=/data/3316/log/oldboy_3308.err
pid-file=/tmp/mysql/3316.pid

 

同样,把/data/3317/etc/my.cnf /data/3318/etc/my.cnf /data/3319/etc/my.cnf 也都复制相同的内容,不过要把所有的3316换成对应的端口。

然后启动mysql:

 

cd /data/3316/bin
./mysqld_safe --defaults-file=/data/3316/etc/my.cnf --user=mysql --basedir=/data/3316 --datadir=/data/3316/var/ --log-error=/data/3316/mysql.err &

 

 

 

 注意:这一步defaults-file配置项必须位于第一个。

同样在/data/3316/bin目录下执行

 

./mysqld_safe --defaults-file=/data/3317/etc/my.cnf --user=mysql --basedir=/data/3316 --datadir=/data/3317/var/ --log-error=/data/3317/mysql.err &

./mysqld_safe --defaults-file=/data/3318/etc/my.cnf --user=mysql --basedir=/data/3316 --datadir=/data/3318/var/ --log-error=/data/3318/mysql.err &

./mysqld_safe --defaults-file=/data/3319/etc/my.cnf --user=mysql --basedir=/data/3316 --datadir=/data/3319/var/ --log-error=/data/3319/mysql.err &

 

 

 

这时候输入命令:

 

ls /tmp/mysql

 

 

 

应该会显示:

 

到这一步mysql就已经完全安装成功了,接下来需要给各个mysql设置密码,开启主从复制,接下来以3316,3317为例;3318,3319同理:

cd /data/3316/bin
./mysqladmin -S /tmp/mysql/3316.sock -uroot password#接下来输入两次密码,我输入的是123
./mysqladmin -S /tmp/mysql/3317.sock -uroot password#同上

./mysql -uroot -S 3316.sock -p #输入密码
grant all privileges  on *.* to root@'%' identified by "password"; #开启mysql远程访问权限,password换成你的密码
flush privileges;
create database db1; #创建实验数据库
GRANT replication slave ON *.* TO 'slave'@'%' IDENTIFIED BY '123';#在主库创建一个从库用来访问的用户
show master status;

 show master status命令结果如图:

此时3316不要再动,打开另一个窗口操作:

cd /data/3316/bin
./mysql -uroot -S 3317.sock -p
create database db1;
stop slave;
reset slaCHANGE MASTER TO MASTER_HOST='10.223.138.154',MASTER_PORT=3316,MASTER_USER='slave',MASTER_PASSWORD='123',MASTER_LOG_FILE='mysql-bin.000004',MASTER_LOG_POS=246;
start slave;
shhow slave status\G;
如果显示的两项为YES,就代表主从复制已经配置好了,可以实验下在主库新建表,对数据增删改查,从库是否会做同样的操作

 

 

再用同样的操作把3318、3319配置好

三、安装zookeeper

mkdir /opt/zookeeper
cd /opt/zookeeper
wget http://mirror.bit.edu.cn/apache/zookeeper/stable/zookeeper-3.4.13.tar.gz #推荐从国内镜像站下载,官网太慢了
tar -xvf zookeeper-3.4.13.tar.gz
cd zookeeper-3.4.13
cp   /opt/zookeeper/zookeeper-3.4.13/conf/zoo_sample.cfg        /opt/zookeeper/zookeeper-3.4.13/conf/zoo.cfg
cd bin
./zkServer.sh start
./zkServer.sh status #查看zookeeper启动结果

 


 四、安装mycat-web

mkdir /opt/mycat-web #创建mycat-web目录
cd /opt/mycat-web
wget https://raw.githubusercontent.com/MyCATApache/Mycat-download/master/mycat-web-1.0/Mycat-web-1.0-SNAPSHOT-20160617163048-linux.tar.gz
tar xvf Mycat-web-1.0-SNAPSHOT-20160617163048-linux.tar.gz
cd mycat-web
vi mycat-web/WEB-INF/classes/mycat.properties
zookeeper=10.223.138.154:2181 #修改值,保存退出
./start.sh

 

 五、安装mycat

wget http://dl.mycat.io/1.6-RELEASE/Mycat-server-1.6-RELEASE-20161028204710-linux.tar.gz #下载mycat
tar -xvf Mycat-server-1.6-RELEASE-20161028204710-linux.tar.gz
cd mycat
cd conf 
vi schema.xml

 

 schema.xml文件是mycat的精华,mycat的读写分离,分库分表功能都通过这个文件实现,先贴上我的配置(此部分参考了别人的配置):

<?xml version="1.0"?>
<!DOCTYPE mycat:schema SYSTEM "schema.dtd">
<mycat:schema xmlns:mycat="http://io.mycat/">
    <!-- TESTDB 是mycat的逻辑库名称,链接需要用的 -->
    <schema name="TESTDB" checkSQLschema="false" sqlMaxLimit="100">
        <!-- auto sharding by id (long) -->
        <table name="travelrecord" dataNode="dn1,dn2" rule="auto-sharding-long" />

        <!-- global table is auto cloned to all defined data nodes ,so can join
            with any table whose sharding node is in the same data node -->
        <table name="company" primaryKey="ID" type="global" dataNode="dn1" />
        <table name="goods" primaryKey="ID" type="global" dataNode="dn2" />
        <!-- random sharding using mod sharind rule -->
        <table name="hotnews" primaryKey="ID" autoIncrement="true" dataNode="dn1"
               rule="mod-long" />
        <table name="employee" primaryKey="ID" dataNode="dn1,dn2"
               rule="sharding-by-intfile" />
        <table name="customer" primaryKey="ID" dataNode="dn1,dn2"
               rule="sharding-by-intfile">
    </schema>
        <!-- database 是MySQL数据库的库名 -->
    <dataNode name="dn1" dataHost="localhost1" database="db1" />
    <dataNode name="dn2" dataHost="localhost1" database="db3" />
    <!--
    dataNode节点中各属性说明:
    name:指定逻辑数据节点名称;
    dataHost:指定逻辑数据节点物理主机节点名称;
    database:指定物理主机节点上。如果一个节点上有多个库,可使用表达式db$0-99,     表示指定0-99这100个数据库;

    dataHost 节点中各属性说明:
        name:物理主机节点名称;
        maxCon:指定物理主机服务最大支持1000个连接;
        minCon:指定物理主机服务最小保持10个连接;
        writeType:指定写入类型;
            0,只在writeHost节点写入;
            1,在所有节点都写入。慎重开启,多节点写入顺序为默认写入根据配置顺序,第一个挂掉切换另一个;
        dbType:指定数据库类型;
        dbDriver:指定数据库驱动;
        balance:指定物理主机服务的负载模式。
            0,不开启读写分离机制;
            1,全部的readHost与stand by writeHost参与select语句的负载均衡,简单的说,当双主双从模式(M1->S1,M2->S2,并且M1与 M2互为主备),正常情况下,M2,S1,S2都参与select语句的负载均衡;
            2,所有的readHost与writeHost都参与select语句的负载均衡,也就是说,当系统的写操作压力不大的情况下,所有主机都可以承担负载均衡;
-->
    <dataHost name="localhost1" maxCon="1000" minCon="10" balance="1" writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">
        <heartbeat>select user()</heartbeat>
        <!-- 可以配置多个主从 -->
        <writeHost host="hostM1" url="10.223.138.154:3316" user="root" password="123">
            <!-- 可以配置多个从库 -->
            <readHost host="hostS1" url="10.223.138.154:3317" user="root" password="123" />
        </writeHost>
    </dataHost>
    <dataHost name="localhost2" maxCon="1000" minCon="10" balance="1" writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">
        <heartbeat>select user()</heartbeat>
        <!-- 可以配置多个主从 -->
        <writeHost host="hostM2" url="10.223.138.154:3318" user="root" password="123">
            <!-- 可以配置多个从库 -->
            <readHost host="hostS2" url="10.223.138.154:3319" user="root" password="123" />
        </writeHost>
    </dataHost>
</mycat:schema>

 

这个配置好了之后配置server.xml

vi server.xml #只要注意如下部分即可,其他的不要动
 <user name="root">
                <property name="password">mysql</property>
                <property name="schemas">TESTDB</property>

                <!-- 表级 DML 权限设置 -->
                <!--
                <privileges check="false">
                        <schema name="TESTDB" dml="0110" >
                                <table name="tb01" dml="0000"></table>
                                <table name="tb02" dml="1111"></table>
                        </schema>
                </privileges>
                 -->
        </user>

 

 这个是比较容易配置的,只要改下password就可以,另外要保证 <property name="schemas">TESTDB</property>这个标签里的要和schema.xml的schema标签的name一致

 

cd ../bin
./mycat start #开启mycat

 六、连接mycatweb和mycat

访问地址:10.223.138.154:8082/mycat/

页面如图所示,然后配置mycat:

然后就可以自己试试mycat-web的丰富功能了。

 

posted on 2019-03-20 15:35  盈盈的月儿  阅读(1127)  评论(0编辑  收藏  举报