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LVS+Keepalived 高可用群集的介绍和搭建步骤

2021-11-20 16:58:59  阅读：181  来源： 互联网

标签：LVS 群集 Keepalived keepalived 192.168 conf 80 root localhost


目录

一. keepalived工具介绍

1.专为LVS和HA设计的一款健康检查工具

2.keepalived实现原理

3.VRRP（虚拟路由冗余协议）

二.LVS+Keepalived高可用群集的搭建

1.主DR服务器（192.168.68.200）

1.安装Keepalived程序

2. 给主配置文件做备份

3.修改主配置文件 

4.查看虚拟网卡vip 

​5.关闭Linux内核的重定向参数响应

 6.刷新配置

 7.加载模块

2.备DR服务器（192.168.68.30）

1.安装Keepalived程序

2. 给主配置文件做备份

3.修改主配置文件 

4.查看虚拟网卡vip 

​5.关闭Linux内核的重定向参数响应

 6.刷新配置

7.加载模块

3. Web 服务器1（192.168.68.105）

1.安装http服务并开启

2.在网页站点目录中创建网页文件，并写入内容

3.在web1的浏览器中输入自己的ip进行验证

4.创建虚拟接口并进行相关配置 

5.开启虚接口并查看

6.调整proce响应参数

7.更新配置

4. Web 服务器2（192.168.68.40）

1.安装http服务并开启

2.在网页站点目录中创建网页文件，并写入内容

3.在web1的浏览器中输入自己的ip进行验证

4.创建虚拟接口并进行相关配置 

5.开启虚接口并查看

6.调整proce响应参数

7.更新配置

5.测试

一. keepalived工具介绍

1.专为LVS和HA设计的一款健康检查工具

  • 支持故障自动切换
  • 支持节点健康状态检查
  • 官方网站：http://www.keepalived.org/

2.keepalived实现原理

Keepalived采用VRRP热备份协议，实现Linux服务器的多机热备功能

3.VRRP（虚拟路由冗余协议）

针对路由器的一种备份

  • 由多台路由器组成一个热备组，通过共用的虚拟IP地址对外提供服务
  • 每个热备组内同时只有一台路由器提供服务，其他路由器处于冗余状态
  • 若当前在线的路由器失效，则其他路由器会根据设置的优先级自动接替虚拟IP地址，继续提供服务

二.LVS+Keepalived高可用群集的搭建

在基于LVS+Keepalived实现的LVS群集结构中，至少包括两台热备的负载调度器，三台以上的节点服务器

主DR 服务器：192.168.68.200
备DR 服务器：192.168.68.30
Web 服务器1：192.168.68.105
Web 服务器2：192.168.68.40
vip：192.168.68.95
客户端：192.168.68.138 

配置负载调度器（主备相同）

1.主DR服务器（192.168.68.200）

1.安装Keepalived程序

2. 给主配置文件做备份

3.修改主配置文件 

 [root@localhost keepalived]# vim keepalived.conf

将42行后面的内容都删掉改为

4.查看虚拟网卡vip 

5.关闭Linux内核的重定向参数响应

 [root@localhost keepalived]# vim /etc/sysctl.conf 

6.刷新配置

7.加载模块

[root@localhost ~]# systemctl stop firewalld.service 
[root@localhost ~]# setenforce 0
[root@localhost ~]# yum install -y ipvsadm.x86_64 keepalived.x86_64 
[root@localhost ~]# cd /etc/keepalived/
[root@localhost keepalived]# cp keepalived.conf keepalived.conf.bak
[root@localhost keepalived]# vim keepalived.conf
 10    smtp_server 127.0.0.1
 12    router_id LVS_01
 14    #vrrp_strict   ##将14行注释掉

 19 vrrp_instance VI_1 {
 20     state MASTER
 21     interface ens33
 22     virtual_router_id 10
 23     priority 100
 24     advert_int 1
 25     authentication {
 26         auth_type PASS
 27         auth_pass 123123
 28     }
 29     virtual_ipaddress {
 30         192.168.68.95
 31     } 

 34 virtual_server 192.168.68.95 80 {
 35     delay_loop 6
 36     lb_algo rr
 37     lb_kind DR
 38     persistence_timeout 50
 39     protocol TCP

 41     real_server 192.168.68.105 80 {
 42         weight 1
 43         TCP_CHECK {
 44                 connect_port 80
 45                 connect_timeout 3
 46                 nb_get_retry 3
 47                 delay_before_retry 3
 48         }
 49   }
 50     real_server 192.168.68.40 80 {
 51         weight 1
 52         TCP_CHECK {
 53                 connect_port 80
 54                 connect_timeout 3
 55                 nb_get_retry 3
 56                 delay_before_retry 3
 57         }
 58   }
 59 }
[root@localhost ~]# cd /etc/sysconfig/network-scripts/
[root@localhost network-scripts]# cp ifcfg-ens33 ifcfg-ens33:0
[root@localhost network-scripts]# vim ifcfg-ens33:0
NAME=ens33:0
DEVICE=ens33:0
ONBOOT=yes
IPADDR=192.168.68.95
NETMASK=255.255.255.255
[root@localhost network-scripts]# systemctl restart network
[root@localhost network-scripts]# ifconfig 
[root@localhost keepalived]# vim /etc/sysctl.conf 
##在末尾添加
 11 net.ipv4.ip_forward = 0
 12 net.ipv4.conf.all.send_redirects = 0
 13 net.ipv4.conf.default.send_redirects = 0
 14 net.ipv4.conf.ens33.send_redirects = 0
[root@localhost keepalived]# sysctl -p
[root@localhost keepalived]# modprobe ip_vs
[root@localhost keepalived]# cat /proc/net/ip_vs
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP  C0A8445F:0050 rr  persistent 50000 FFFFFFFF
[root@localhost keepalived]# ipvsadm-save >/etc/sysconfig/ipvsadm
[root@localhost keepalived]# systemctl start ipvsadm.service 
[root@localhost keepalived]# ipvsadm -C
[root@localhost keepalived]# ipvsadm -A -t 192.168.68.95:80 -s rr
[root@localhost keepalived]# ipvsadm -a -t 192.168.68.95:80 -r 192.168.68.105:80 -g
[root@localhost keepalived]# ipvsadm -a -t 192.168.68.95:80 -r 192.168.68.40:80 -g
[root@localhost keepalived]# ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  localhost.localdomain:http rr
  -> 192.168.68.40:http           Route   1      0          0         
  -> 192.168.68.105:http          Route   1      0          0         
[root@localhost keepalived]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.68.95:80 rr
  -> 192.168.68.40:80             Route   1      0          0         
  -> 192.168.68.105:80            Route   1      0          0         
[root@localhost keepalived]# ipvsadm-save >/etc/sysconfig/ipvsadm

2.备DR服务器（192.168.68.30）

1.安装Keepalived程序

2. 给主配置文件做备份

3.修改主配置文件 

 [root@localhost keepalived]# vim keepalived.conf

将42行后面的内容都删掉改为

4.查看虚拟网卡vip 

5.关闭Linux内核的重定向参数响应

 [root@localhost keepalived]# vim /etc/sysctl.conf 

6.刷新配置

7.加载模块

[root@localhost ~]# systemctl stop firewalld.service 
[root@localhost ~]# setenforce 0
[root@localhost ~]# yum install -y ipvsadm.x86_64 keepalived.x86_64 
[root@localhost ~]# cd /etc/keepalived/
[root@localhost keepalived]# cp keepalived.conf keepalived.conf.bak
[root@localhost keepalived]# vim keepalived.conf
 10    smtp_server 127.0.0.1
 12    router_id LVS_01
 14    #vrrp_strict   ##将14行注释掉

 19 vrrp_instance VI_1 {
 20     state MASTER
 21     interface ens33
 22     virtual_router_id 10
 23     priority 100
 24     advert_int 1
 25     authentication {
 26         auth_type PASS
 27         auth_pass 123123
 28     }
 29     virtual_ipaddress {
 30         192.168.68.95
 31     } 

 34 virtual_server 192.168.68.95 80 {
 35     delay_loop 6
 36     lb_algo rr
 37     lb_kind DR
 38     persistence_timeout 50
 39     protocol TCP

 41     real_server 192.168.68.105 80 {
 42         weight 1
 43         TCP_CHECK {
 44                 connect_port 80
 45                 connect_timeout 3
 46                 nb_get_retry 3
 47                 delay_before_retry 3
 48         }
 49   }
 50     real_server 192.168.68.40 80 {
 51         weight 1
 52         TCP_CHECK {
 53                 connect_port 80
 54                 connect_timeout 3
 55                 nb_get_retry 3
 56                 delay_before_retry 3
 57         }
 58   }
 59 }
[root@localhost ~]# cd /etc/sysconfig/network-scripts/
[root@localhost network-scripts]# cp ifcfg-ens33 ifcfg-ens33:0
[root@localhost network-scripts]# vim ifcfg-ens33:0
NAME=ens33:0
DEVICE=ens33:0
ONBOOT=yes
IPADDR=192.168.68.95
NETMASK=255.255.255.255
[root@localhost network-scripts]# systemctl restart network
[root@localhost network-scripts]# ifconfig 
[root@localhost keepalived]# vim /etc/sysctl.conf 
##在末尾添加
 11 net.ipv4.ip_forward = 0
 12 net.ipv4.conf.all.send_redirects = 0
 13 net.ipv4.conf.default.send_redirects = 0
 14 net.ipv4.conf.ens33.send_redirects = 0
[root@localhost keepalived]# sysctl -p
[root@localhost keepalived]# modprobe ip_vs
[root@localhost keepalived]# cat /proc/net/ip_vs
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP  C0A8445F:0050 rr  persistent 50000 FFFFFFFF
[root@localhost keepalived]# ipvsadm-save >/etc/sysconfig/ipvsadm
[root@localhost keepalived]# systemctl start ipvsadm.service 
[root@localhost keepalived]# ipvsadm -C
[root@localhost keepalived]# ipvsadm -A -t 192.168.68.95:80 -s rr
[root@localhost keepalived]# ipvsadm -a -t 192.168.68.95:80 -r 192.168.68.105:80 -g
[root@localhost keepalived]# ipvsadm -a -t 192.168.68.95:80 -r 192.168.68.40:80 -g
[root@localhost keepalived]# ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  localhost.localdomain:http rr
  -> 192.168.68.40:http           Route   1      0          0         
  -> 192.168.68.105:http          Route   1      0          0         
[root@localhost keepalived]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.68.95:80 rr
  -> 192.168.68.40:80             Route   1      0          0         
  -> 192.168.68.105:80            Route   1      0          0         
[root@localhost keepalived]# ipvsadm-save >/etc/sysconfig/ipvsadm

3. Web 服务器1（192.168.68.105）

1.安装http服务并开启

2.在网页站点目录中创建网页文件，并写入内容

 [root@localhost html]# vim index.html

 

3.在web1的浏览器中输入自己的ip进行验证

4.创建虚拟接口并进行相关配置 

5.开启虚接口并查看

6.调整proce响应参数

[root@localhost network-scripts]# vim /etc/sysctl.conf

7.更新配置

[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# setenforce 0
[root@localhost ~]# yum install -y httpd 
[root@localhost ~]# systemctl start httpd.service 
[root@localhost ~]# cd /var/www/html/
[root@localhost html]# vim index.html
hello oyyyyy!!!!!!!
[root@localhost html]# cd /etc/sysconfig/network-scripts/
[root@localhost network-scripts]# cp ifcfg-lo ifcfg-lo:0
DEVICE=lo
IPADDR=192.168.68.95
NETMASK=255.255.255.255
NETWORK=127.0.0.0
# If you're having problems with gated making 127.0.0.0/8 a martian,
# you can change this to something else (255.255.255.255, for example)
#BROADCAST=127.255.255.255
ONBOOT=yes
#NAME=loopback
[root@localhost network-scripts]# ifup lo:0
[root@localhost network-scripts]# ifconfig lo:0
[root@localhost network-scripts]# vim /etc/sysctl.conf
##在最后添加这些参数
net.ipv4.conf.lo.arp_ignore = 1
net.ipv4.conf.lo.arp_announce = 2
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2
[root@localhost network-scripts]# sysctl -p

4. Web 服务器2（192.168.68.40）

1.安装http服务并开启

2.在网页站点目录中创建网页文件，并写入内容

 [root@localhost html]# vim index.html

 

3.在web1的浏览器中输入自己的ip进行验证

4.创建虚拟接口并进行相关配置 

5.开启虚接口并查看

6.调整proce响应参数

[root@localhost network-scripts]# vim /etc/sysctl.conf

7.更新配置

[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# setenforce 0
[root@localhost ~]# yum install -y httpd 
[root@localhost ~]# systemctl start httpd.service 
[root@localhost ~]# cd /var/www/html/
[root@localhost html]# vim index.html
hello wangyibo!!!!!!!!!
[root@localhost html]# cd /etc/sysconfig/network-scripts/
[root@localhost network-scripts]# cp ifcfg-lo ifcfg-lo:0
DEVICE=lo
IPADDR=192.168.68.95
NETMASK=255.255.255.255
NETWORK=127.0.0.0
# If you're having problems with gated making 127.0.0.0/8 a martian,
# you can change this to something else (255.255.255.255, for example)
#BROADCAST=127.255.255.255
ONBOOT=yes
#NAME=loopback
[root@localhost network-scripts]# ifup lo:0
[root@localhost network-scripts]# ifconfig lo:0
[root@localhost network-scripts]# vim /etc/sysctl.conf
##在最后添加这些参数
net.ipv4.conf.lo.arp_ignore = 1
net.ipv4.conf.lo.arp_announce = 2
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2
[root@localhost network-scripts]# sysctl -p

5.测试

在浏览器中输入192.168.68.95 

等待1分钟后刷新

将主服务器的ens33:0down掉之后再输入192.168.68.95

刷新后

标签：LVS,群集,Keepalived,keepalived,192.168,conf,80,root,localhost
来源： https://blog.csdn.net/oyyy3/article/details/121403624

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