在linux下安装keepalived的时候，报错configure:error:nftables header files missing，跪求大神解决方案

Posted 2023-04-30

参考技术A 如果是centos，可以使用yum安装，避免补相关包的问题
yum install keepalived 参考技术B 为啥不用包管理器？
1.ubuntu apt-get
2.centos yum
3.fedora dnf
这种工具很方便 参考技术C 解决了吗？我也遇到了同样的问题

MySQL之keepalived高可用

参考技术A 使用keepalived做mysql主从切换的高可用

keepalived切换的优缺点

1.可以切换虚拟IP

2.可能发生裂脑，就是主从服务器都同时出现一样的VIP，导致写入数据的时候，往主从都写入了数据

3.可能导致主从mysql数据不一致。主在down机的时候，有部分数据还没同步到从mysql

此实验在mysql使用gtid同步实现的前提下的

192.168.209.132 master

192.168.209.131 slave

1.安装keepalived

直接yum安装或者编译安装都可以，生产环境也是ok的

2.配置keepalived的配置文件

keepalived配置文件默认放在/etc/keepalived/文件夹下

如果不把配置文件放这里，那么启动keepalived的时候，需要用参数指定配置文件的位置

这里我用默认安装和默认配置文件位置

192.168.209.132:

vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs

  notification_email

 

  router_id SLAVE



vrrp_script chk_mysql

    script "/data/script/mysql_check.sh"

    interval 2

    weight -20



vrrp_instance VI_1

    state BACKUP

    interface eth0

    nopreempt

    virtual_router_id 131

    priority 100

    advert_int 1

    authentication

        auth_type PASS

        auth_pass 1111

   

    virtual_ipaddress

        192.168.209.16

   

  track_script

        chk_mysql

   



监控脚本：

vim /data/script/mysql_check.sh

#!/bin/sh

mysqlstr=/usr/local/mysql/bin/mysql

host=localhost

user=root

password=123456

port=33061

mysql_status=1

$mysqlstr -h $host -u $user -p$password -P $port -e "show status;" > /dev/null 2>&1

if [ $? = 0 ] ;then

  echo "mysql_status=1"

  exit 0

else

  pkill keepalived

fi

192.168.209.131:

vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs

  notification_email

 

  router_id SLAVE



vrrp_script chk_mysql

    script "/data/script/mysql_check.sh"

    interval 2

    weight -20



vrrp_instance VI_1

    state BACKUP

    interface eth0

    nopreempt

    virtual_router_id 131

    priority 90

    advert_int 1

    authentication

        auth_type PASS

        auth_pass 1111

   

    virtual_ipaddress

        192.168.209.16

   

  track_script

        chk_mysql

   



配置文件：

vim /data/script/mysql_check.sh

#!/bin/sh

mysqlstr=/usr/local/mysql/bin/mysql

host=localhost

user=root

password=123456

port=33061

mysql_status=1

$mysqlstr -h $host -u $user -p$password -P $port -e "show status;" > /dev/null 2>&1

if [ $? = 0 ] ;then

  echo "mysql_status=1"

  exit 0

else

  pkill keepalived

fi

对实验结果开始进行验证

192.168.209.132上获取到vip

把192.168.209.132上的mysqld给干掉

查看192.168.209.132上的mysqld和keepalived进程是否都被干掉了；虚拟IP是否切换到192.168.209.131上了

查看192.168.209.131上是否有VIP

把192.168.209.132上的keepalived和mysqld都启动起来。先启mysqld再起keepalived

此时keepalived启动起来了，虽然权重比192.168.209.131的高，但是设置了不抢夺，所以192.168.209.132上的keepalived不会切换vip过来

此时，把192.168.209.131上的mysql停掉它

查看131上的mysql和keepalived是否已经都停止了

查看192.168.209.132上是否有VIP了