现在还是生产部门部署mysql+keepalived高可用的吗用的多吗

是的，MySQL+Keepalived高可用方案在生产环境中仍然是一种常用的方案。它可以提高MySQL数据库系统的可用性和稳定性，避免因为单点故障而导致的系统宕机和数据丢失问题。

虽然目前有其他高可用方案如MySQL Replication、MySQL Cluster等，但是MySQL+Keepalived方案仍然具有以下优点：

实现简单：相比于其他高可用方案，MySQL+Keepalived方案配置相对简单，且能够实现较好的高可用性。

负载均衡：Keepalived可以实现MySQL的负载均衡，将请求分发到不同的MySQL节点上。

故障转移：在主节点出现故障时，Keepalived可以自动将请求转移到备节点上，避免数据丢失和服务中断。

当然，对于不同的业务需求，选择不同的高可用方案是有必要的。需要综合考虑业务需求、数据规模、技术实现成本等因素。

请看👉 ：使用Keepalived实现mysql高可用
除此之外, 这篇博客: Mysql集群配置（回顾）中的 5、MySQL双主复制+keepalived高可用 部分也许能够解决你的问题, 你可以仔细阅读以下内容或跳转源博客中阅读:

【环境】：

mysql-vip: 192.168…45.2
mysql-1:192.168.45.3
mysql-2:192.168.45.4

1、mysql1配置： vim /etc/my.cnf

[client]
port            = 3306
socket          = /tmp/mysql.sock

[mysqld]
port            = 3306
socket          = /tmp/mysql.sock
datadir         =/usr/local/mysql/var/
skip-locking
skip-name-resolve
key_buffer = 64M
max_allowed_packet = 64M
table_cache = 2048
sort_buffer_size = 4M
net_buffer_length = 256K
read_buffer_size = 10M
read_rnd_buffer_size = 10M
myisam_sort_buffer_size = 16M
interactive_timeout = 240
wait_timeout = 240
max_connections = 800
connect_timeout=30
open_files_limit=8192
query_cache_size = 1024M
thread_cache_size=16
thread_concurrency = 8
long_query_time = 1
log-slow-queries = slow.log

innodb_additional_mem_pool_size = 8M
innodb_buffer_pool_size = 32M
innodb_log_buffer_size=8M
innodb_log_file_size = 256M
innodb_log_files_in_group = 3
innodb_file_io_threads = 8
innodb_lock_wait_timeout= 50
innodb_thread_concurrency = 16
innodb_file_per_table

log_slave_updates
expire_logs_days=7
auto_increment_increment=2
auto_increment_offset=2
binlog_format=mixed
log-bin=mysql-bin
server-id       = 8   ###为服务器制定唯一ID

[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash

[isamchk]
key_buffer = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[myisamchk]
key_buffer = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]    ###双主复制
interactive-timeout

设置mysql复制账号：

mysql>GRANT REPLICATION SLAVE ON . TO ‘repl’@‘192.168.45.3’ IDENTIFIED BY ‘repl_123’;
mysql>GRANT REPLICATION SLAVE ON . TO ‘repl’@‘192.168.45.4’ IDENTIFIED BY ‘repl_123’;

导出数据库：

#mysqldump -uroot -p --single-transaction --flush-logs --master-data=2 --all-databases > all.sql

2、MySQL2配置： vim /etc/my.cnf

[client]
port            = 3306
socket          = /tmp/mysql.sock

[mysqld]
port            = 3306
socket          = /tmp/mysql.sock
datadir			=/usr/local/mysql/var/ ##与主1一致
skip-locking
skip-name-resolve
key_buffer = 64M
max_allowed_packet = 64M
table_cache = 128
sort_buffer_size = 4M
net_buffer_length = 256K
read_buffer_size = 10M
read_rnd_buffer_size = 10M
myisam_sort_buffer_size = 64M
interactive_timeout = 240
wait_timeout = 240
max_connections = 800
connect_timeout=30
open_files_limit=8192
query_cache_size = 1024M
thread_cache_size=16
thread_concurrency = 8
long_query_time = 1
log-slow-queries = slow.log

innodb_additional_mem_pool_size = 8M
innodb_buffer_pool_size = 64M
innodb_log_buffer_size=8M
innodb_log_file_size = 256M
innodb_log_files_in_group = 3
innodb_file_io_threads = 8
innodb_lock_wait_timeout= 50
innodb_thread_concurrency = 16
innodb_file_per_table


log_slave_updates
expire_logs_days=7
auto_increment_increment=2
auto_increment_offset=1
binlog_format=mixed
log-bin=mysql-bin
server-id       = 9  ###为服务器制定唯一ID

[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash

[isamchk]
key_buffer = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[myisamchk]
key_buffer = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]  ##双主复制
interactive-timeout

导入主库数据

#mysql -uroot -p < all.sql

设置同步

mysql> CHANGE MASTER TO MASTER_HOST=‘192.168.45.238’,MASTER_PORT=‘3306’,MASTER_USER=‘repl’,MASTER_PASSWORD=‘repl_123’,MASTER_LOG_FILE=‘mysql-bin.000007’,MASTER_LOG_POS=106;
mysql> start slave; ##启动slaver复制

在MySQL1上执行相同的同步操作指令：

mysql>CHANGE MASTER TOMASTER_HOST=‘192.168.45.239’,MASTER_PORT=‘3306’,MASTER_USER=‘repl’,MASTER_PASSWORD=‘repl_123’,MASTER_LOG_FILE=‘mysql-bin.000008’,MASTER_LOG_POS=105020214;
mysql>start slave;

实际就是上文主从数据库的变种，彼此互为主，彼此互为从。

3、配置keepalived

安装keepalived： 在2台mysql上分别安装并配置

wget http://www.keepalived.org/software/keepalived-1.2.2.tar.gz

在这里插入图片描述
依据你的环境下载需要的版本，上图为比较新的版本。

编译安装：

tar zxvf keepalived-1.2.2.tar.gz
cd keepalived-1.2.2
./configure --prefix=/
make
make install

mysql1上keepalive的配置： vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived
global_defs {
    router_id blue.com
}
vrrp_script check_run {
    script "/root/keepalived_check_mysql.sh"
    interval 5
}
vrrp_sync_group VG1 {
     group {
        VI_1
     }
}
vrrp_instance VI_1 {
     state MASTER
     interface eth0
     virtual_router_id 88
     priority 100
     advert_int 1
     nopreempt
     authentication {
         auth_type PASS
         auth_pass yuangang.net
     }
     track_script {
         check_run
     }
     virtual_ipaddress {                     ##虚拟ip配置，即VIP
         192.168.45.2
     }
}

编写mysql脚本用于检测验证mysql高可用：

vim test_keepalived

#!/bin/bash
MYSQL=/usr/local/mysql/bin/mysql
MYSQL_HOST=localhost
MYSQL_USER=root
MYSQL_PASSWORD=
CHECK_TIME=3
#mysql  is working MYSQL_OK is 1 , mysql down MYSQL_OK is 0
MYSQL_OK=1
function check_mysql_helth (){
$MYSQL -h $MYSQL_HOST -u $MYSQL_USER -e "show status;" >/dev/null 2>&1
if [ $? = 0 ] ;then
     MYSQL_OK=1
else
     MYSQL_OK=0
fi
     return $MYSQL_OK
}
while [ $CHECK_TIME -ne 0 ]
do
     let "CHECK_TIME -= 1"
     check_mysql_helth
if [ $MYSQL_OK = 1 ] ; then
     CHECK_TIME=0
     exit 0
fi

if [ $MYSQL_OK -eq 0 ] &&  [ $CHECK_TIME -eq 0 ]
then
     /etc/init.d/keepalived stop
exit 1
fi
sleep 1
done
#!/bin/bash
MYSQL=/usr/local/mysql/bin/mysql
MYSQL_HOST=localhost
MYSQL_USER=root
MYSQL_PASSWORD=
CHECK_TIME=3
#mysql  is working MYSQL_OK is 1 , mysql down MYSQL_OK is 0
MYSQL_OK=1
function check_mysql_helth (){
$MYSQL -h $MYSQL_HOST -u $MYSQL_USER -e "show status;" >/dev/null 2>&1
if [ $? = 0 ] ;then
     MYSQL_OK=1
else
     MYSQL_OK=0
fi
     return $MYSQL_OK
}
while [ $CHECK_TIME -ne 0 ]
do
     let "CHECK_TIME -= 1"
     check_mysql_helth
if [ $MYSQL_OK = 1 ] ; then
     CHECK_TIME=0
     exit 0
fi

if [ $MYSQL_OK -eq 0 ] &&  [ $CHECK_TIME -eq 0 ]
then
     /etc/init.d/keepalived stop
exit 1
fi
sleep 1
done
chmod 755  /root/keepalived_check_mysql.sh

mysql2上keepalive的配置： vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived
global_defs {
    router_id blue.com
}
vrrp_script check_run {
    script "/root/keepalived_check_mysql.sh"
    interval 5
}
vrrp_sync_group VG1 {
     group {
       VI_1
     }
}
vrrp_instance VI_1 {
     state BACKUP
     interface eth0
     virtual_router_id 88
     priority 80
     advert_int 1
     authentication {
         auth_type PASS
         auth_pass blue.com
     }
     track_script {
         check_run
     }
     virtual_ipaddress {   ##虚拟ip配置一致
         192.168.45.2
     }
}

4、启动mysql和keepalived

启动 mysql-1上的keepalived mysql：

/etc/init.d/keepalived start
/etc/init.d/mysqld start

启动mysql-2上的keepalived mysql

/etc/init.d/keepalived start
/etc/init.d/mysqld start

5、验证：

关闭2台中其中1台上的mysql在另外一台机器上用vip连接mysql，连接正常同样的方法测试另一台机器。

-----待整理

现在还是生产部门部署mysql+keepalived高可用的吗 用的多吗

现在还是生产部门部署mysql+keepalived高可用的吗用的多吗