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集群-LVS-NAT,DR

时间：2020-11-13 10:26:43      阅读：31      评论：0      收藏：0      [点我收藏+]

目录

LVS-DR模式搭建Mysql集群

环境描述

  • 关闭所有防火墙和selinux
主机 服务 LVS角色
vm5(192.168.225.134) Load balancer
vm2(192.168.225.128) mysql real server
vm4(192.168.225.131) mysql real server
vm3(192.168.225.130) NFS(vm2,vm4) storage
  • vm3,vm2,vm4 uid,gid一致
[root@vm3 opt]# id mysql 
uid=888(mysql) gid=888(mysql) groups=888(mysql)
[root@vm3 mysql_data]# vi /etc/exports
/opt/mysql_data 192.168.225.0/24(rw,all_squash,anonuid=888,anongid=888)

  • Virtual IP：
    设置为192.168.225.200(便于实践，实际上因该为公网地址)

  • NFS共享存储搭建

vm2,vm4挂在共享目录

  • vm2
[root@vm2 opt]# cat >> /etc/fstab <<EOF
> 192.168.225.130:/opt/mysql_data /opt/mysql_data/data nfs defaults,_netdev 0 0
> EOF
[root@vm2 opt]# mount -a 
[root@vm2 opt]# df -hT
Filesystem                      Type      Size  Used Avail Use% Mounted on
devtmpfs                        devtmpfs  979M     0  979M   0% /dev
tmpfs                           tmpfs     991M     0  991M   0% /dev/shm
tmpfs                           tmpfs     991M  9.5M  981M   1% /run
tmpfs                           tmpfs     991M     0  991M   0% /sys/fs/cgroup
/dev/mapper/centos-root         xfs        17G  5.7G   12G  34% /
/dev/sda1                       xfs      1014M  137M  878M  14% /boot
tmpfs                           tmpfs     199M     0  199M   0% /run/user/0
192.168.225.130:/opt/mysql_data nfs4       17G  1.6G   16G  10% /opt/mysql_data/data
  • vm4
[root@vm4 opt]# cat >> /etc/fstab <<EOF
> 192.168.225.130:/opt/mysql_data /opt/mysql_data/data nfs defaults,_netdev 0 0
> EOF
[root@vm4 opt]# mount -a 
[root@vm4 opt]# df -hT
Filesystem                      Type      Size  Used Avail Use% Mounted on
devtmpfs                        devtmpfs  963M     0  963M   0% /dev
tmpfs                           tmpfs     981M     0  981M   0% /dev/shm
tmpfs                           tmpfs     981M  8.7M  972M   1% /run
tmpfs                           tmpfs     981M     0  981M   0% /sys/fs/cgroup
/dev/mapper/cl-root             xfs        17G  5.9G   12G  35% /
/dev/sda1                       ext4      976M  109M  800M  12% /boot
tmpfs                           tmpfs     197M     0  197M   0% /run/user/0
192.168.225.130:/opt/mysql_data nfs4       17G  1.6G   16G  10% /opt/mysql_data/data

部署数据库

初始化数据库

  • 应为vm2,vm4共享mysql_data目录，所以只用初始化一此
[root@vm2 share]# /usr/local/mysql/bin/mysqld --initialize --user=mysql --datadir=/opt/mysql_data/data --explicit_defaults_for_timestamp
2020-11-09T06:34:22.191406Z 0 [Warning] InnoDB: New log files created, LSN=45790
2020-11-09T06:34:22.470740Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2020-11-09T06:34:22.560196Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 9a8fa408-2255-11eb-bfc3-000c29461984.
2020-11-09T06:34:22.570801Z 0 [Warning] Gtid table is not ready to be used. Table ‘mysql.gtid_executed‘ cannot be opened.
2020-11-09T06:34:22.585675Z 1 [Note] A temporary password is generated for root@localhost: MOu-X-84/h*B
[root@vm2 data]# ll
total 110628
-rw-r----- 1 mysql mysql       56 Nov 11  2020 auto.cnf
-rw-r----- 1 mysql mysql      417 Nov 11  2020 ib_buffer_pool
-rw-r----- 1 mysql mysql 12582912 Nov 11  2020 ibdata1
-rw-r----- 1 mysql mysql 50331648 Nov 11  2020 ib_logfile0
-rw-r----- 1 mysql mysql 50331648 Nov 11  2020 ib_logfile1
drwxr-x--- 2 mysql mysql     4096 Nov 11  2020 mysql
drwxr-x--- 2 mysql mysql     8192 Nov 11  2020 performance_schema
drwxr-x--- 2 mysql mysql     8192 Nov 11  2020 sys

[root@vm4 mysql_data]# ll data/
total 110628
-rw-r----- 1 mysql mysql       56 Nov 11 17:00 auto.cnf
-rw-r----- 1 mysql mysql      417 Nov 11 17:00 ib_buffer_pool
-rw-r----- 1 mysql mysql 12582912 Nov 11 17:00 ibdata1
-rw-r----- 1 mysql mysql 50331648 Nov 11 17:00 ib_logfile0
-rw-r----- 1 mysql mysql 50331648 Nov 11 17:00 ib_logfile1
drwxr-x--- 2 mysql mysql     4096 Nov 11 17:00 mysql
drwxr-x--- 2 mysql mysql     8192 Nov 11 17:00 performance_schema
drwxr-x--- 2 mysql mysql     8192 Nov 11 17:00 sys

配置数据库

  • vm2,vm4
[myqld]
basedir=/usr/local/mysql
datadir=/opt/mysql_data/data
socket=/tmp/mysql.sock
port=3306
pid-file=/tmp/mysql.pid
user=mysql
skip-name-resolve

两台数据不能同时开启mysql服务

[root@vm2 data]# service mysqld start 
Starting MySQL.. SUCCESS! 
[root@vm2 data]# ss -antl 
State      Recv-Q Send-Q Local Address:Port                Peer Address:Port              
LISTEN     0      128                *:9000                           *:*                  
LISTEN     0      128                *:111                            *:*                  
LISTEN     0      128                *:22                             *:*                  
LISTEN     0      100        127.0.0.1:25                             *:*                  
LISTEN     0      80              [::]:3306                        [::]:*                  
LISTEN     0      128             [::]:111                         [::]:*                  
LISTEN     0      128             [::]:22                          [::]:*                  
LISTEN     0      100            [::1]:25                          [::]:*                  
[root@vm2 data]# 
[root@vm4 mysql_data]# service mysqld start 
Starting MySQL..................................................................................................... ERROR! The server quit without updating PID file (/opt/mysql_data/data/vm4.pid).
2020-11-11T12:09:32.397689Z 0 [Note] InnoDB: Check that you do not already have another mysqld process using the same InnoDB data or log files.
2020-11-11T12:09:33.400072Z 0 [ERROR] InnoDB: Unable to lock ./ibdata1 error: 11
2020-11-11T12:09:33.400137Z 0 [Note] InnoDB: Check that you do not already have another mysqld process using the same InnoDB data or log files.
2020-11-11T12:09:33.400151Z 0 [Note] InnoDB: Unable to open the first data file
2020-11-11T12:09:33.401669Z 0 [ERROR] InnoDB: Operating system error number 11 in a file operation.
2020-11-11T12:09:33.401716Z 0 [ERROR] InnoDB: Error number 11 means ‘Resource temporarily unavailable‘
2020-11-11T12:09:33.401732Z 0 [Note] InnoDB: Some operating system error numbers are described at http://dev.mysql.com/doc/refman/5.7/en/operating-system-error-codes.html

授权测试机登录数据库

mysql> grant all privileges on *.* to ‘root‘@‘192.168.43.166‘ identified by ‘123456‘;
Query OK, 0 rows affected, 1 warning (2 min 50.81 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.03 sec)

LVS-DR实现mysql负载均衡

vm5安装LVPS

[root@vm5 ~]# yum -y install ipvsadm
.............
Installed:
  ipvsadm-1.31-1.el8.x86_64                                                                 

Complete!

配置调度器IP地址

  • 配置DIP,VIP
[root@vm5 ~]# vi /etc/sysconfig/network-scripts/ifcfg-ens32 
TYPE=Ethernet
BOOTPROTO=static
NAME=ens32
DEVICE=ens32
ONBOOT=yes
IPADDR0=192.168.225.134
NETMASK0=255.255.255.0
GATEWAY0=192.168.225.2
DNS1=192.168.225.2

IPADDR1=192.168.225.200     
NETMASK1=255.255.255.0
[root@vm5 ~]# ifdown ens32;ifup ens32
Connection ‘ens32‘ successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/3)
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/4)
[root@vm5 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:81:38:b9 brd ff:ff:ff:ff:ff:ff
    inet 192.168.225.134/24 brd 192.168.225.255 scope global noprefixroute ens32
       valid_lft forever preferred_lft forever
    inet 192.168.225.200/24 brd 192.168.225.255 scope global secondary noprefixroute ens32
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe81:38b9/64 scope link 
       valid_lft forever preferred_lft forever

vm4配置RS的IP地址

  • 配置VM4：RIP
[root@vm4 ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33 
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
IPADDR0=192.168.225.131
NETMASK0=255.255.225.0
GATEWAY0=192.168.225.2
DNS1=192.168.225.2
NAME=ens32
DEVICE=ens32
ONBOOT=yes
  • 先修改arp配置
[root@vm4 ~]# vim /etc/sysctl.conf 
net.ipv4.conf.all.arp_ignore=1
net.ipv4.conf.all.arp_announce=2
  • 再配置VIP
[root@vm4 ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33 
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
IPADDR0=192.168.225.131
NETMASK0=255.255.225.0
GATEWAY0=192.168.225.2
DNS1=192.168.225.2
NAME=ens32
DEVICE=ens32
ONBOOT=yes

IPADDR1=192.168.225.200
NETMASK1=255.255.255.0

[root@vm4 ~]# ifdown ens33;ifup ens33
Connection ‘ens33‘ successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/7)
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/8)
[root@vm4 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:da:ad:a2 brd ff:ff:ff:ff:ff:ff
    inet 192.168.225.131/24 brd 192.168.225.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet 192.168.225.200/24 brd 192.168.225.255 scope global secondary noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::3d23:8838:5393:f99/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
  • 配置路由信息（由于VIP，RIP，DIP都是在用一网络，就不用配置）

vm2配置RS地址

  • 修改arp配置
[root@vm2 ~]# vim /etc/sysctl.conf 
net.ipv4.conf.all.arp_ignore=1
net.ipv4.conf.all.arp_announce=2
  • 配置VIP，RIP
[root@vm2 ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33 
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
IPADDR0=192.168.225.128
NETMASK0=255.255.225.0
GATEWAY0=192.168.225.2
DNS1=192.168.225.2
NAME=ens32
DEVICE=ens32
ONBOOT=yes

IPADDR1=192.168.225.200
NETMASK1=255.255.255.0

[root@vm2 ~]# ifdown ens33;ifup ens33
Device ‘ens33‘ successfully disconnected.
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/6)
[root@vm2 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:46:19:84 brd ff:ff:ff:ff:ff:ff
    inet 192.168.225.128/24 brd 192.168.225.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet 192.168.225.200/24 brd 192.168.225.255 scope global secondary noprefixroute ens33
       valid_lft forever preferred_lft forever

在调度器上添加规则

[root@vm5 ~]# ipvsadm -A -t 192.168.225.200:3306 -s rr
[root@vm5 ~]# ipvsadm -a -t 192.168.225.200:3306 -r 192.168.225.128:3306 -g
[root@vm5 ~]# ipvsadm -a -t 192.168.225.200:3306 -r 192.168.225.131:3306 -g
[root@vm5 ~]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.225.200:3306 rr
  -> 192.168.225.128:3306         Route   1      0          0         
  -> 192.168.225.131:3306         Route   1      0          0         
[root@vm5 ~]# ipvsadm -Sn > /etc/sysconfig/ipvsadm
[root@vm5 ~]# cat /etc/sysconfig/ipvsadm
-A -t 192.168.225.200:3306 -s rr
-a -t 192.168.225.200:3306 -r 192.168.225.128:3306 -g -w 1
-a -t 192.168.225.200:3306 -r 192.168.225.131:3306 -g -w 1
[root@vm5 ~]#

LVS-NAT实现apache负载均衡

环境描述

  • 关闭所有防火墙和selinux
主机 服务 LVS角色
vm5(192.168.225.134) Load balancer
vm2(192.168.225.128) httpd real server
vm4(192.168.225.131) httpd real server
  • VIP:192.168.225.200

搭建环境

vm2，vm4

https/http配置

[root@vm2 ~]# yum -y install httpd
[root@vm2 ssl]# yum  -y install mod_ssl
[root@vm2 ~]# systemctl start httpd
[root@vm2 ~]# ss -antl 
State      Recv-Q Send-Q Local Address:Port               Peer Address:Port              
LISTEN     0      128          *:22                       *:*                  
LISTEN     0      100    127.0.0.1:25                       *:*                  
LISTEN     0      128       [::]:80                    [::]:*                  
LISTEN     0      128       [::]:22                    [::]:*                  
LISTEN     0      100      [::1]:25                    [::]:*    

[root@vm2 wisan]# pwd
/var/www/html/wisan
[root@vm2 wisan]# cat index.html 
rs1

[root@vm2 wisan]# vi /etc/httpd/conf.d/vhost.conf
<VirtualHost *:80>
    ServerName www.wisan.com
    DocumentRoot "/var/www/html/wisan"
    ErrorLog "/var/log/httpd/error_log"
    CustomLog "/var/log/httpd/access_log" common
</VirtualHost>
~
  • 生成证书
过程略
[root@vm2 ssl]# pwd
/etc/httpd/ssl
[root@vm2 ssl]# ls
httpd.crt  httpd.csr  httpd.key
  • vm4过程与上面相似，vm2,vm4共用证书和密钥

调度器vm5安装ipvsadm

[root@vm5 ~]# yum -y install ipvsadm

配置ip地址

load balancer(vm5)

[root@vm5 ~]# vi /etc/sysconfig/network-scripts/ifcfg-ens32
TYPE=Ethernet
BOOTPROTO=static
IPADDR0=192.168.225.134            ##DIP
NETMASK0=255.255.225.0
GATEWAY0=192.168.225.2

NAME=ens32
DEVICE=ens32
ONBOOT=yes

IPADDR1=192.168.225.200           ##VIP
NETMASK1=255.255.255.0
[root@vm5 ~]# ifdown ens32;ifup ens32
Connection ‘ens32‘ successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/4)
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/5)
[root@vm5 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:81:38:b9 brd ff:ff:ff:ff:ff:ff
    inet 192.168.225.134/24 brd 192.168.225.255 scope global noprefixroute ens32
       valid_lft forever preferred_lft forever
    inet 192.168.225.200/24 brd 192.168.225.255 scope global secondary noprefixroute ens32
       valid_lft forever preferred_lft forever

real server(vm2,vm4)

  • vm2
[root@vm2 ssl]# vi /etc/sysconfig/network-scripts/ifcfg-ens33 
TYPE=Ethernet
BOOTPROTO=static
NAME=ens33
DEVICE=ens33
ONBOOT=yes
IPADDR=192.168.225.128
NETMASK=255.255.255.0
GATEWAY=192.168.225.134

[root@vm2 ssl]# ifdown ens33;ifup ens33
Device ‘ens33‘ successfully disconnected.
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/7)
[root@vm2 ssl]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:46:19:84 brd ff:ff:ff:ff:ff:ff
    inet 192.168.225.128/24 brd 192.168.225.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
[root@vm2 ssl]# route -nv
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.225.134 0.0.0.0         UG    100    0        0 ens33
192.168.225.0   0.0.0.0         255.255.255.0   U     100    0        0 ens33
  • vm4
[root@vm4 ssl]# vi /etc/sysconfig/network-scripts/ifcfg-ens33 
TYPE=Ethernet
BOOTPROTO=static
NAME=ens33
DEVICE=ens33
ONBOOT=yes
IPADDR=192.168.225.131
NETMASK=255.255.255.0
GATEWAY=192.168.225.134

[root@vm4 ssl]# ifdown ens33;ifup ens33
Connection ‘ens33‘ successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/3)
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/4)
[root@vm4 ssl]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:da:ad:a2 brd ff:ff:ff:ff:ff:ff
    inet 192.168.225.131/24 brd 192.168.225.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
[root@vm4 ssl]# route -nv
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.225.134 0.0.0.0         UG    100    0        0 ens33
192.168.225.0   0.0.0.0         255.255.255.0   U     100    0        0 ens33

开启调度器ip转发功能

[root@vm5 ~]# vi /etc/sysctl.conf 
net.ipv4.ip_forward = 1
[root@vm5 ~]# sysctl -p /etc/sysctl.conf 
net.ipv4.ip_forward = 1

在调度器上添加规则

[root@vm5 ~]# ipvsadm -A -t 192.168.225.200:80 -s rr
[root@vm5 ~]# ipvsadm -a -t 192.168.225.200:80 -r 192.168.225.128:80 -m
[root@vm5 ~]# ipvsadm -a -t 192.168.225.200:80 -r 192.168.225.131:80 -m
[root@vm5 ~]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.225.200:80 rr
  -> 192.168.225.128:80           Masq    1      0          0         
  -> 192.168.225.131:80           Masq    1      0          0         
[root@vm5 ~]# ipvsadm -Sn > /etc/sysconfig/ipvsadm
[root@vm5 ~]# cat /etc/sysconfig/ipvsadm
-A -t 192.168.225.200:80 -s rr
-a -t 192.168.225.200:80 -r 192.168.225.128:80 -m -w 1
-a -t 192.168.225.200:80 -r 192.168.225.131:80 -m -w 1

[root@vm5 ~]# ipvsadm -A -t 192.168.225.200:443 -s rr
[root@vm5 ~]# ipvsadm -a -t 192.168.225.200:443 -r 192.168.225.131:443 -m
[root@vm5 ~]# ipvsadm -a -t 192.168.225.200:443 -r 192.168.225.128:443 -m
[root@vm5 ~]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.225.200:80 rr
  -> 192.168.225.128:80           Masq    1      0          0         
  -> 192.168.225.131:80           Masq    1      0          0         
TCP  192.168.225.200:443 rr
  -> 192.168.225.128:443          Masq    1      0          0         
  -> 192.168.225.131:443          Masq    1      0          0         
[root@vm5 ~]# ipvsadm -Sn > /etc/sysconfig/ipvsadm
[root@vm5 ~]# cat /etc/sysconfig/ipvsadm
-A -t 192.168.225.200:80 -s rr
-a -t 192.168.225.200:80 -r 192.168.225.128:80 -m -w 1
-a -t 192.168.225.200:80 -r 192.168.225.131:80 -m -w 1
-A -t 192.168.225.200:443 -s rr
-a -t 192.168.225.200:443 -r 192.168.225.128:443 -m -w 1
-a -t 192.168.225.200:443 -r 192.168.225.131:443 -m -w 1

总结

  • 上述配置基本没什么问题，但是没有达到预期的效果
  • 原因是:
  • 1.两台mysql服务器通过NFS共享数据库文件时，不能同时开启两台mysql服务，若要解决这个问题，需要对其作高可用功能
  • 2.经过测试，LVS-nat模式中的VIP与各服务器真实的IP地址最好属于不同的网段，这样才能得到预期的效果
  • 3.NAT网络地址转换，真实服务器处理完数据包需要发送给网关，如果客户端与真实服务器在相同网段，那么数据包不会经过网关而是直接返回给客户端

集群-LVS-NAT,DR

原文：https://www.cnblogs.com/fyjpeng/p/13967691.html
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