tail -f host-slow.log
rm -rf master.info
rm -rf relay-log.info
装包
rpm -ivh maxscale-2.1.2-1.rhel.7.x86_64.rpm
[root@host56 ~]# rpm -qa | grep maxscale
maxscale-2.1.2-1.x86_64
[root@host56 ~]# rpm -qc maxscale
/etc/maxscale.cnf.template
[root@host56 ~]#
修改配置文件
[root@host56 ~]# ls /etc/maxscale.cnf
/etc/maxscale.cnf
[root@host56 ~]# cp /etc/maxscale.cnf /etc/maxscale.cnf.bak
[root@host56 ~]# vim /etc/maxscale.cnf
[maxscale]
threads=1
[server1]
type=server
address=192.168.4.51
port=3306
protocol=MySQLBackend
[server2]
type=server
address=192.168.4.52
port=3306
protocol=MySQLBackend
[MySQL Monitor]
type=monitor
module=mysqlmon
servers=server1, server2
user=scalemon
passwd=123456
monitor_interval=10000
[Read-Write Service]
type=service
router=readwritesplit
servers=server1, server2
user=maxscale
passwd=123456
max_slave_connections=100%
[MaxAdmin Service]
type=service
router=cli
[Read-Write Listener]
type=listener
service=Read-Write Service
protocol=MySQLClient
port=4006
[MaxAdmin Listener]
type=listener
service=MaxAdmin Service
protocol=maxscaled
socket=default
port=4018
[root@host56 ~]#
根据配置文件做相应的设置(在2台数据库服务器上添加用户)
监控数据库服务器时，连接数据库服务器的用户
grant replication slave, replication client on *.*
to scalemon@'%' identified by "123456"；
验证 访问数据时，连接数据库服务器使用的用户，是否在数据库服务器上存在的，连接用户
mysql>
grant select on mysql.*
to maxscale@'%' identified by "123456";
查看授权用户
mysql> select user,host from mysql.user where user in ("scalemon","maxscale");
+----------+------+
| user | host |
+----------+------+
| maxscale | % |
| scalemon | % |
+----------+------+
启动服务
[root@host56 ~]# maxscale -f /etc/maxscale.cnf
查看服务进程和端口
查看端口
[root@host56 ~]# netstat -utnlp | grep :4006
tcp6 0 0 :::4006 :::* LISTEN 29688/maxscale
[root@host56 ~]#
[root@host56 ~]# netstat -utnlp | grep :4018
tcp6 0 0 :::4018 :::* LISTEN 29688/maxscale
[root@host56 ~]#
查看进程
[root@host56 ~]# ps -C maxscale
PID TTY TIME CMD
29688 ? 00:00:00 maxscale
[root@host56 ~]#
停止服务
[root@host56 ~]# ps -C maxscale
PID TTY TIME CMD
29688 ? 00:00:00 maxscale
[root@host56 ~]# kill -9 29688
[root@host56 ~]#
[root@host56 ~]#
[root@host56 ~]# kill -9 29688
-bash: kill: (29688) - 进程不存在
2.2.3 测试配置
A 在本机访问管理管端口查看监控状态
[root@host56 ~]# maxadmin -P4018 -uadmin -pmariadb
MaxScale> list servers
Servers.
-------------------+-----------------+-------+-------------+--------------------
Server | Address | Port | Connections | Status
-------------------+-----------------+-------+-------------+--------------------
server1 | 192.168.4.51 | 3306 | 0 | Master, Running
server2 | 192.168.4.52 | 3306 | 0 | Slave, Running
-------------------+-----------------+-------+-------------+--------------------
MaxScale> exit
[root@host56 ~]#
b 客户端访问数据读写分离服务器
]#which mysql
]# mysql -h192.168.4.56 -P4006 -uwebuser -p123456
mysql> select @@hostname；
mysql> 执行插入或查询 （ 在51 和 52 本机查看记录）
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
pkill -9 maxscale
systemct disable mysqld
管理工具
连接池
接口
分析器
优化器
查询缓存
存储引擎
文件系统
show variables like
set global max_connections=300;
show global status like "max_connections"
2.2 配置mysql多实例
要求：在主机192.168.4.56配置mysql多实例：
运行2个数据库服务
第1个数据库服务 数据库目录 /dataone
服务端口号 3307
sock文件 /dataone/mysqld.sock
日志文件 /dataone/mysqld.log
第2个数据库服务
数据库目录 /datatow
服务端口号 3308
sock文件 /datatwo/mysqld.sock
日志文件 /datatwo/mysqld.log
1 环境准备
netstat -utnalp | grep :3307
netstat -utnalp | grep :3308
2 安装提供多实例服务的, mysql数据库服务软件
[root@host56 ~]# mv mysql-5.7.20-linux-glibc2.12-x86_64 /usr/local/mysql
[root@host56 ~]#
[root@host56 ~]# ls /usr/local/mysql/
bin COPYING docs include lib man README share support-files
[root@host56 ~]# ls /usr/local/mysql/bin/
innochecksum mysqladmin mysqld_multi mysqlpump mysqlxtest
lz4_decompress mysqlbinlog mysqld_safe mysql_secure_installation perror
myisamchk mysqlcheck mysqldump mysqlshow replace
myisam_ftdump mysql_client_test_embedded mysqldumpslow mysqlslap resolveip
myisamlog mysql_config mysql_embedded mysql_ssl_rsa_setup
resolve_stack_dump
myisampack mysql_config_editor mysqlimport mysqltest_embedded
zlib_decompress
my_print_defaults mysqld mysql_install_db mysql_tzinfo_to_sql
mysql mysqld-debug mysql_plugin mysql_upgrade
[root@host56 ~]#
[root@host56 ~]# echo "export PATH=/usr/local/mysql/bin:$PATH" >> /etc/profile
[root@host56 ~]# source /etc/profile
[root@host56 ~]# echo $PATH
/usr/local/mysql/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin
du -sh 文件
3 编辑配置文件
]# rm -rf /etc/my.cnf
]#vim /etc/my.cnf
[mysqld_multi]
mysqld = /usr/local/mysql/bin/mysqld_safe
mysqladmin = /usr/local/mysql/bin/mysqladmin user = root
[mysqld1]
port=3307
datadir=/dataone
socket=/dataone/mysqld.sock
log-error=/dataone/mysqld.log
pid-file=/dataone/mysqld.pid
[mysqld2]
port=3308
datadir=/datatwo
socket=/datatwo/mysqld.sock
log-error=/datatwo/mysqld.log
pid-file=/datatwo/mysqld.pid
:wq
4 根据配置文件的设置，做相应的配置
4.1创建数据库目录
4.2创建进程运行的所有者和组 mysql
[root@host56 ~]# mkdir -p /dataone
[root@host56 ~]# mkdir -p /datatwo
[root@host56 ~]# useradd mysql
c[root@host56 ~]# chown mysql:mysql /data*
4.3 初始化授权库
]#mysqld --user=mysql --basedir=/usr/local/mysql --datadir=/dataone --initialize
2018-05-05T08:47:48.992696Z 1 [Note] A temporary password is generated for root@localhost:
bXk.5j!pjto#
[root@host56 ~]# ls /dataone/
auto.cnf ib_buffer_pool ibdata1 ib_logfile0 ib_logfile1 mysql performance_schema sys
]#mysqld --user=mysql --basedir=/usr/local/mysql --datadir=/datatwo --initialize
2018-05-05T08:50:09.429934Z 1 [Note] A temporary password is generated for root@localhost:
bKsaf+xzk0V3
[root@host56 ~]# ls /datatwo/
auto.cnf ib_buffer_pool ibdata1 ib_logfile0 ib_logfile1 mysql performance_schema sys
[root@host56 ~]#
5 启动多实例服务
[root@host56 ~]# mysqld_multi start 1
[root@host56 ~]# mysqld_multi start 2
[root@host56 ~]# netstat -utnlp | grep :3308
tcp6 0 0 :::3308 :::* LISTEN 1156/mysqld
[root@host56 ~]# netstat -utnlp | grep :3307
tcp6 0 0 :::3307 :::* LISTEN 927/mysqld
[root@host56 ~]#
6 访问多实例服务
连接实例服务1
[root@host56 ~]#mysql -uroot -p'bXk.5j!pjto#' -S /dataone/mysqld.sock
mysql> ALTER USER user() identified by "123456";
mysql> quit;
]# mysql -uroot -p123456 -S /dataone/mysqld.sock
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.00 sec)
mysql>
连接实例服务2
[root@host56 ~]#mysql -uroot -p'bKsaf+xzk0V3' -S /datatwo/mysqld.sock
mysql> alter user user() identified by "123456";
Query OK, 0 rows affected (0.00 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.00 sec)
mysql> quit
Bye
[root@host56 ~]# mysql -uroot -p123456 -S /datatwo/mysqld.sock
停止启动的实例服务
]# mysqld_multi --user=root --password=密码 stop 实例编号
[root@host56 ~]# netstat -utnlp | grep :3307
tcp6 0 0 :::3307 :::* LISTEN 927/mysqld
[root@host56 ~]#
[root@host56 ~]#
[root@host56 ~]# netstat -utnlp | grep :3308
tcp6 0 0 :::3308 :::* LISTEN 1156/mysqld
[root@host56 ~]#
[root@host56 ~]# mysqld_multi --user=root --password=123456 stop 1
[root@host56 ~]#
[root@host56 ~]# netstat -utnlp | grep :3307
[root@host56 ~]#
[root@host56 ~]# netstat -utnlp | grep :3308
tcp6 0 0 :::3308 :::* LISTEN 1156/mysqld
[root@host56 ~]#
[root@host56 ~]#
[root@host56 ~]#
[root@host56 ~]# mysqld_multi --user=root --password=123456 stop 2
[root@host56 ~]# netstat -utnlp | grep :3308
[root@host56 ~]# mysql -uroot -p123456 -S /datatwo/mysqld.sock
mysql: [Warning] Using a password on the command line interface can be insecure.
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/datatwo/mysqld.sock' (2)
[root@host56 ~]#
+++++++++++++++++++++++++++++++++++++++++++++++
三、mysql优化
启用慢查询日志
vim /etc/my.cnf
[mysqld]
slow-query-log
long-query-time=2
log-queries-not-using-indexes:wq
]# systemctl restart mysqld
]# mysql -uroot -p123456
mysql> select sleep(3);
mysql> select sleep(5);
查看日志文件内容
]# cat /var/lib/mysql/主机名-slow.log
统计日志文件记录信息
~]# mysqldumpslow /var/lib/mysql/db55-slow.log > /tmp/sql.txt
启用查询日志
vim /etc/my.cnf
[mysqld]
general-log
]# systemctl restart mysqld
]# cat /var/lib/mysql/db55.log
3.2.1 在所有主机上安装perl软件包 （51~56）
cd /root/soft/mysql/mha-soft-student
yum -y install perl-*.rpm
yum -y install perl-DBD-mysql
rpm -ivh mha4mysql-node-0.56-0.el6.noarch.rpm
a
3.2.3 只在管理 "主机56" 上安装mha_manager软件包
yum -y install perl-ExtUtils-* perl-CPAN*
tar -xf mha4mysql-manager-0.56.tar.gz
cd mha4mysql-manager-0.56
perl Makefile.PL
make
make install
a
3.2.4 检查配置环境
在主机51 52 53 检查是否有同步数据的用户 repluser
mysql> show grants for repluser@"%" ;
在主机51~55 做如下授权
mysql> grant all on *.* to root@"%" identified by "123456";
在主机51~55 做如下设置
mysql> set global relay_log_purge=off;
3.2.5 拷贝命令（56）
]# cp mha4mysql-manager-0.56/bin/* /usr/local/bin/
3.2.6 创建工作目录 和主配置文件 （56）
]# mkdir /etc/mha_manager/
]# cp mha4mysql-manager-0.56/samples/conf/app1.cnf /etc/mha_manager/
3.2.7 创建故障切换脚本（56）
]# ls /usr/local/bin/master_ip_failover
]# cp mha4mysql-manager-0.56/samples/scripts/master_ip_failover
/usr/local/bin/
3.2.8 编辑主配置文件 app1.cnf(56)
vim /etc/mha_manager/app1.cnf
2.2.9 验证配置
验证ssh 免密码登录 数据节点主机
]# masterha_check_ssh --conf=/etc/mha_manager/app1.cnf
Sun May 6 16:38:19 2018 - [info] All SSH connection tests passed
successfully.
验证 数据节点的主从同步配置（要不调用故障切换脚本）
masterha_check_repl --conf=/etc/mha_manager/app1.cnf
MySQL Replication Health is OK.
四、测试高可用集群配置
4.1 在主库上手动部署vip 地址 192.168.4.100
[root@db51 ~]# ifconfig eth0:1 192.168.4.100/24
[root@db51 ~]# ifconfig eth0:1
eth0:1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu
1500
inet 192.168.4.100 netmask 255.255.255.0 broadcast
192.168.4.255
ether 74:52:09:07:51:01 txqueuelen 1000 (Ethernet)
4.2 修改故障切换脚本 指定vip地址的部署信息
]# vim /usr/local/bin/master_ip_failover
my $vip = '192.168.4.100/24'; # Virtual IP
my $key = "1";
my $ssh_start_vip = "/sbin/ifconfig eth0:$key $vip";
my $ssh_stop_vip = "/sbin/ifconfig eth0:$key down";
：wq
4.3 启动管理服务，并查看服务状态
]# masterha_manager --conf=/etc/mha/app1.cnf
--remove_dead_master_conf --ignore_last_failover
[root@host56 ~]# masterha_check_status --conf=/etc/mha_manager/app1.cnf
app1 (pid:16944) is running(0:PING_OK), master:192.168.4.51
[root@host56 ~]#
++++++++++++++++++++++++++++++++++++++++++++++++
4.4 测试故障转移
在主库51 上执行 ]# shutdown -h now
4.5 在管理主机上查看服务状态(如果服务停止了，手动启动一下服务，再查看状态)
[root@host56 ~]# masterha_check_status --conf=/etc/mha_manager/app1.cnf
app1 (pid:17507) is running(0:PING_OK), master:192.168.4.52
4.6 在52 本机查看是否获取vip地址
[root@db52 ~]# ip addr show | grep 192.168.4
inet 192.168.4.52/24 brd 192.168.4.255 scope global eth0
inet 192.168.4.100/24 brd 192.168.4.255 scope global secondary eth0:1
[root@db52 ~]#
4.6 客户端连接vip地址 ，访问数据服务
]#mysql -h192.168.4.100 -uwebadmin -p123456
mysql>