8.12-基于gtids的主从复制搭建+lvs

一、LVS

1.角色

主机名	ip地址	功能
web01	192.168.2.101	rs
web02	192.168.2.102	realservee
nat	内网:192.168.2.103 外网:192.168.2.120	directorserver,ntp
dns	192.168.2.105	dns

2..web服务器

复制代码

[root@web01 ~]# yum -y install nginx

[root@web01 ~]# echo "web===01" > /usr/share/nginx/html/index.html
[root@web01 ~]# nginx

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[root@web02 ~]# yum -y install nginx

[root@web02 ~]# echo "web===02" > /usr/share/nginx/html/index.html
[root@web02 ~]# nginx

2.nat

配置两个网卡和两个ip地址，一个对内ip，一个对外ip

内网：192.168.2.103

外网：192.168.2.120

3.dns：192.168.2.105

复制代码

[root@localhost ~]# yum -y install bind

[root@localhost ~]# vim /etc/named.conf

options {
        listen-on port 53 { 127.0.0.1;any; };
        listen-on-v6 port 53 { ::1; };
        directory       "/var/named";
        dump-file       "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        memstatistics-file "/var/named/data/named_mem_stats.txt";
        recursing-file  "/var/named/data/named.recursing";
        secroots-file   "/var/named/data/named.secroots";
        allow-query     { localhost;any;};



[root@localhost ~]# vim /etc/named.rfc1912.zones 

zone "haha" IN {
        type master;
        file "haha.zone";
        allow-update { none; };
};



[root@localhost ~]# cd /var/named/
[root@localhost named]# ls
data  dynamic  named.ca  named.empty  named.localhost  named.loopback  slaves
[root@localhost named]# ll
总用量 16
drwxrwx---. 2 named named    6 6月  11 22:40 data
drwxrwx---. 2 named named    6 6月  11 22:40 dynamic
-rw-r-----. 1 root  named 2253 4月   5 2018 named.ca
-rw-r-----. 1 root  named  152 12月 15 2009 named.empty
-rw-r-----. 1 root  named  152 6月  21 2007 named.localhost
-rw-r-----. 1 root  named  168 12月 15 2009 named.loopback
drwxrwx---. 2 named named    6 6月  11 22:40 slaves
[root@localhost named]# cp -p named.localhost haha.zone

[root@localhost named]# vim haha.zone

$TTL 1D
@       IN SOA  @ rname.invalid. (
                                        0       ; serial
                                        1D      ; refresh
                                        1H      ; retry
                                        1W      ; expire
                                        3H )    ; minimum
        NS      @
        A       127.0.0.1
        AAAA    ::1
nat     A       192.168.2.103
ds      A       192.168.2.120
web01   A       192.168.2.101
web02   A       192.168.2.102

检查文件

[root@localhost named]# named-checkconf /etc/named.conf
[root@localhost named]# named-checkconf /etc/named.rfc1912.zones 
[root@localhost named]# named-checkzone haha.zone haha.zone
zone haha.zone/IN: loaded serial 0
OK
[root@localhost named]# systemctl start named
[root@localhost named]# systemctl enable named

4.客户端

复制代码

将配置DNS服务的IP重定向到/etc/resolv中

[root@client ~]# echo "nameserver 192.168.2.105" > /etc/resolv

[root@client ~]# ping nat.haha
PING nat.haha (192.168.2.103) 56(84) bytes of data.
64 bytes from 192.168.2.103 (192.168.2.103): icmp_seq=1 ttl=64 time=0.216 ms
64 bytes from 192.168.2.103 (192.168.2.103): icmp_seq=2 ttl=64 time=0.624 ms
^C
--- nat.haha ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1000ms
rtt min/avg/max/mdev = 0.216/0.420/0.624/0.204 ms
[root@client ~]# ping ds.haha
PING ds.haha (192.168.2.120) 56(84) bytes of data.
64 bytes from 192.168.2.120 (192.168.2.120): icmp_seq=1 ttl=64 time=0.445 ms
64 bytes from 192.168.2.120 (192.168.2.120): icmp_seq=2 ttl=64 time=0.408 ms
^C
--- ds.haha ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 0.408/0.426/0.445/0.027 ms

5.nat：设置时间同步服务器

复制代码

[root@nat ~]# yum -y install ntpdate.x86_64 

[root@nat ~]# crontab -e

* 2 * * * /usr/sbin/ntpdate cn.ntp.org.cn

[root@nat ~]# systemctl start ntpdate.service 
[root@nat ~]# systemctl enable ntpdate.service

6.dns：设置时间同步

复制代码

[root@dns ~]# crontab -e

30 3 * * * /usr/sbin/ntpdate 192.168.2.103（时间服务器的地址）

7.web01

复制代码

[root@web01 ~]# crontab -e

30 3 * * * /usr/sbin/ntpdate 192.168.2.103（时间服务器的地址）

8.web02

复制代码

[root@web02 ~]# crontab -e

30 3 * * * /usr/sbin/ntpdate 192.168.2.103（时间服务器的地址）

9.nat

复制代码

[root@nat ~]# yum -y install ipvsadm.x86_64

二、基于gtids的主从复制搭建

实践步骤

1.修改配置⽂件⽀持GTIDs

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1.master 

[mysqld]
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock
port=3306

log-error=/usr/local/mysql/data/db01-master.err
log-bin=/usr/local/mysql/data/binlog
server-id=10
character_set_server=utf8mb4

gtid-mode=on
log-slave-updates=1
enforce-gtid-consistency

复制代码

2.slave

[mysqld]
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
socket=/tmp/mysql.sock

log-error=/usr/local/mysql/data/err.log
relay-log=/usr/local/mysql/data/relaylog
character_set_server=utf8mb4
server-id=11

log-bin=/usr/local/mysql/data/binlog
gtid-mode=on
log-slave-updates=1
enforce-gtid-consistency
skip-slave-start

2.重新启动mysql服务

复制代码

[root@master ~]# service mysql8 start
Starting MySQL SUCCESS! 



[root@slave ~]# service mysql8 start
Starting MySQL SUCCESS!

3.主从设置只读模式

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mysql> set @@global.read_only=ON;
Query OK, 0 rows affected (0.00 sec)

mysql> set @@global.read_only=ON;
Query OK, 0 rows affected (0.00 sec)

4.slave重新配置change master to

复制代码

mysql> stop slave;
Query OK, 0 rows affected, 2 warnings (0.00 sec)

mysql> reset slave;
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> change master to
    -> master_host='192.168.2.38',
    -> master_user='slave',
    -> master_password='slave_123;',
    -> master_port=3306,
    -> master_auto_position=1;
Query OK, 0 rows affected, 8 warnings (0.02 sec)

mysql> start slave;
Query OK, 0 rows affected, 1 warning (0.02 sec)

mysql> show slave status\G

5.关闭主从服务只读模式

复制代码

mysql> set @@global.read_only=OFF;
Query OK, 0 rows affected (0.00 sec)



mysql> set @@global.read_only=OFF;
Query OK, 0 rows affected (0.01 sec)

6.获得公钥

复制代码

[root@slave ~]# mysql -uslave  -h192.168.2.38 -P3306 --get-server-public-key -p
Enter password: