私活做网站,青岛招聘seo,做网站找个人还是公司,有网站代码怎么建设6.1 KeepalivedLVS集群介绍 Keepalived和LVS共同构建了一个高效的负载均衡和高可用性解决方案#xff1a;LVS作为负载均衡器#xff0c;负责在集群中的多个服务器间分配流量#xff0c;以其高性能和可扩展性确保应用程序能够处理大量的并发请求#xff1b;而Keepalived则作…6.1 KeepalivedLVS集群介绍 Keepalived和LVS共同构建了一个高效的负载均衡和高可用性解决方案LVS作为负载均衡器负责在集群中的多个服务器间分配流量以其高性能和可扩展性确保应用程序能够处理大量的并发请求而Keepalived则作为高可用性保证通过VRRP协议监控LVS服务的状态并在主服务器发生故障时自动进行故障转移确保服务的持续可用性和无感知切换。这种结合利用了两者的优势为关键的网络服务提供了一个稳定、可靠且高效的运行环境。 机器名称IP地址子网掩码说明Keepalived-01192.168.110.31255.255.255.0负载均衡高可用Keepalived-02192.168.110.32255.255.255.0负载均衡高可用RS1192.168.110.33255.255.255.0真实服务器1RS2192.168.110.34255.255.255.0真实服务器2Client192.168.110.35255.255.255.0客户端
6.2 后端RS配置 配置系统服务脚本
[rootLVS-RS1 ~]# vim /etc/init.d/LVS_RS
#!/bin/bash
# Startup script to handle the initialisation of LVS
# chkconfig: - 28 72
# description: Initialise the Linux Virtual Server for DR
# Provides: ipvsadm
# Required-Start: $local_fs $network $named
# Required-Stop: $local_fs $remote_fs $network
# Short-Description: Initialise the Linux Virtual Server
# Description: The Linux Virtual Server is a highly scalable and highly
# available server built on a cluster of real servers, with the load
# balancer running on Linux.
LOCK/var/lock/ipvsadm.lock
VIP192.168.110.10
. /etc/rc.d/init.d/functions
start() {PIDifconfig | grep lo:20 | wc -lif [ $PID -ne 0 ]; thenecho The LVS-DR-RIP Server is already running !else/sbin/ifconfig lo:20 $VIP netmask 255.255.255.255 broadcast $VIP up/sbin/route add -host $VIP dev lo:20echo 1 /proc/sys/net/ipv4/conf/lo/arp_ignoreecho 2 /proc/sys/net/ipv4/conf/lo/arp_announceecho 1 /proc/sys/net/ipv4/conf/all/arp_ignoreecho 2 /proc/sys/net/ipv4/conf/all/arp_announce/bin/touch $LOCKecho starting LVS-DR-RIP server is ok !fi
}
stop() {/sbin/route del -host $VIP dev lo:20/sbin/ifconfig lo:20 down /dev/nullecho 0 /proc/sys/net/ipv4/conf/lo/arp_ignoreecho 0 /proc/sys/net/ipv4/conf/lo/arp_announceecho 0 /proc/sys/net/ipv4/conf/all/arp_ignoreecho 0 /proc/sys/net/ipv4/conf/all/arp_announcerm -rf $LOCKecho stopping LVS-DR-RIP server is ok !
}
status() {if [ -e $LOCK ]; thenecho The LVS-DR-RIP Server is already running !elseecho The LVS-DR-RIP Server is not running !fi
}
case $1 instart)start;;stop)stop;;restart)stopstart;;status)status;;*)echo Usage: $1 {start|stop|restart|status}exit 1
esac
exit 0
[rootLVS-RS1 ~]# chmod x /etc/init.d/LVS_RS
[rootLVS-RS1 ~]# chkconfig --add LVS_RS
[rootLVS-RS1 ~]# systemctl start LVS_RS.service
[rootLVS-RS1 ~]# scp /etc/init.d/LVS_RS 192.168.110.34:/etc/init.d/ #发给另一台RS
[rootLVS-RS2 ~]# chmod x /etc/init.d/LVS_RS
[rootLVS-RS2 ~]# chkconfig --add LVS_RS
[rootLVS-RS2 ~]# systemctl start LVS_RS.service
6.3 Keepalived配置
6.3.1 基于TCP的健康检测
6.3.1.1 Keepalived-01配置
[rootKeepalived-01 ~]# cp /etc/keepalived/keepalived.conf{,.bak}
[rootKeepalived-01 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {router_id LVS_node1
}
vrrp_instance LVS {state MASTERinterface ens160virtual_router_id 51priority 100advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.110.10}
}
virtual_server 192.168.110.10 80 {delay_loop 6 lb_algo rrlb_kind DRprotocol TCP
real_server 192.168.110.33 80 {weight 1TCP_CHECK {connect_timeout 3retry 3delay_before_retry 3connect_port 80}}real_server 192.168.110.34 80 {weight 1TCP_CHECK {connect_timeout 3retry 3delay_before_retry 3connect_port 80}}
}
[rootKeepalived-01 ~]# systemctl start keepalived.service
[rootKeepalived-01 ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size4096)
Prot LocalAddress:Port Scheduler Flags- RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.110.10:80 rr- 192.168.110.33:80 Route 1 0 0 - 192.168.110.34:80 Route 1 0 0
6.3.1.2 Keepalived-02配置
[rootKeepalived-02 ~]# cp /etc/keepalived/keepalived.conf{,.bak}
[rootKeepalived-02 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {router_id LVS_node2
}
vrrp_instance LVS {state MASTERinterface ens160virtual_router_id 51priority 80advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.110.10}
}
virtual_server 192.168.110.10 80 {delay_loop 6 lb_algo rrlb_kind DRprotocol TCP
real_server 192.168.110.33 80 {weight 1TCP_CHECK {connect_timeout 3retry 3delay_before_retry 3connect_port 80}}real_server 192.168.110.34 80 {weight 1TCP_CHECK {connect_timeout 3retry 3delay_before_retry 3connect_port 80}}
}
[rootKeepalived-02 ~]# systemctl start keepalived.service
[rootKeepalived-02 ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size4096)
Prot LocalAddress:Port Scheduler Flags- RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.110.10:80 rr- 192.168.110.33:80 Route 1 0 0 - 192.168.110.34:80 Route 1 0 0
6.3.1.3 访问测试
[rootClient ~]# for ((i1;i6;i)); do curl http://192.168.110.10; done
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.33 HostLVS-RS1
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.33 HostLVS-RS1
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.33 HostLVS-RS1
6.3.1.4 模拟故障转移
[rootKeepalived-01 ~]# systemctl stop keepalived.service
[rootKeepalived-02 ~]# ip address show ens160 #VIP漂移到Keepalived-02
2: ens160: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc mq state UP group default qlen 1000link/ether 00:0c:29:b0:0d:30 brd ff:ff:ff:ff:ff:ffaltname enp3s0inet 192.168.110.32/24 brd 192.168.110.255 scope global noprefixroute ens160valid_lft forever preferred_lft foreverinet 192.168.110.10/32 scope global ens160valid_lft forever preferred_lft foreverinet6 fe80::20c:29ff:feb0:d30/64 scope link noprefixroute valid_lft forever preferred_lft forever
[rootClient ~]# for ((i1;i6;i)); do curl http://192.168.110.10; done #访问正常
This is LVS test IP192.168.110.33 HostLVS-RS1
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.33 HostLVS-RS1
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.33 HostLVS-RS1
This is LVS test IP192.168.110.34 HostLVS-RS2
[rootKeepalived-01 ~]# systemctl start keepalived.service
[rootKeepalived-01 ~]# ip address show ens160 #恢复后回来
2: ens160: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc mq state UP group default qlen 1000link/ether 00:0c:29:d1:a9:eb brd ff:ff:ff:ff:ff:ffaltname enp3s0inet 192.168.110.31/24 brd 192.168.110.255 scope global noprefixroute ens160valid_lft forever preferred_lft foreverinet 192.168.110.10/32 scope global ens160valid_lft forever preferred_lft foreverinet6 fe80::20c:29ff:fed1:a9eb/64 scope link noprefixroute valid_lft forever preferred_lft forever
6.3.1.5 后端服务器故障
[rootLVS-RS1 ~]# systemctl stop nginx.service
[rootKeepalived-02 ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size4096)
Prot LocalAddress:Port Scheduler Flags- RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.110.10:80 rr- 192.168.110.34:80 Route 1 0 9 [rootClient ~]# for ((i1;i6;i)); do curl http://192.168.110.10; done #访问正常
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.34 HostLVS-RS2
6.3.2 基于HTTP的健康检测
6.3.2.1 生成远程网页的MD5哈希值 genhash 是一个命令行工具用于生成远程网页的MD5哈希值。它可以用于监控HTTP和HTTPS服务特别是在Keepalived配置中用于健康检查。genhash 可以通过HTTP或HTTPS连接到网页并生成页面数据的MD5哈希值该哈希值可以在Keepalived配置文件中使用。
[rootKeepalived-01 ~]# genhash -s 192.168.110.33 -p 80 -u /index.html
MD5SUM fd0508d1ccc6c66c14977e54ffc7faef
[rootKeepalived-01 ~]# genhash -s 192.168.110.34 -p 80 -u /index.html
MD5SUM 0632aaa5fb77608b1a4736d47aacb62c
[rootKeepalived-02 ~]# genhash -s 192.168.110.33 -p 80 -u /index.html
MD5SUM fd0508d1ccc6c66c14977e54ffc7faef
[rootKeepalived-02 ~]# genhash -s 192.168.110.34 -p 80 -u /index.html
MD5SUM 0632aaa5fb77608b1a4736d47aacb62c
6.3.2.2 Keepalived-01配置
[rootKeepalived-01 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {router_id LVS_node1
}
vrrp_instance LVS {state MASTERinterface ens160virtual_router_id 51priority 100advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.110.10}
}
virtual_server 192.168.110.10 80 {delay_loop 6 lb_algo rrlb_kind DRprotocol TCP
real_server 192.168.110.33 80 {weight 1
HTTP_GET {url {path /index.htmldigest fd0508d1ccc6c66c14977e54ffc7faef}connect_timeout 3nb_get_retry 3delay_before_retry 3}}real_server 192.168.110.34 80 {weight 1HTTP_GET {url {path /index.htmldigest 0632aaa5fb77608b1a4736d47aacb62c
}connect_timeout 3nb_get_retry 3delay_before_retry 3}}
}
[rootKeepalived-01 ~]# systemctl start keepalived.service
[rootKeepalived-01 ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size4096)
Prot LocalAddress:Port Scheduler Flags- RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.110.10:80 rr- 192.168.110.33:80 Route 1 0 0 - 192.168.110.34:80 Route 1 0 0
6.3.2.3 Keepalived-02配置
[rootKeepalived-02 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {router_id LVS_node2
}
vrrp_instance LVS {state MASTERinterface ens160virtual_router_id 51priority 80advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.110.10}
}
virtual_server 192.168.110.10 80 {delay_loop 6 lb_algo rrlb_kind DRprotocol TCP
real_server 192.168.110.34 80 {weight 1
HTTP_GET {url {path /index.htmldigest fd0508d1ccc6c66c14977e54ffc7faef}connect_timeout 3nb_get_retry 3delay_before_retry 3}}real_server 192.168.110.34 80 {weight 1HTTP_GET {url {path /index.htmldigest 0632aaa5fb77608b1a4736d47aacb62c
}connect_timeout 3nb_get_retry 3delay_before_retry 3}}
}
[rootKeepalived-02 ~]# systemctl start keepalived.service
[rootKeepalived-02 ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size4096)
Prot LocalAddress:Port Scheduler Flags- RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.110.10:80 rr- 192.168.110.33:80 Route 1 0 0 - 192.168.110.34:80 Route 1 0 0
6.3.2.4 访问测试
[rootClient ~]# for ((i1;i6;i)); do curl http://192.168.110.10; done
This is LVS test IP192.168.110.33 HostLVS-RS1
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.33 HostLVS-RS1
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.33 HostLVS-RS1
This is LVS test IP192.168.110.34 HostLVS-RS2
6.3.2.5 模拟故障转移
[rootKeepalived-01 ~]# systemctl stop keepalived.service
[rootKeepalived-02 ~]# ip address show ens160 #VIP漂移到Keepalived-02
2: ens160: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc mq state UP group default qlen 1000link/ether 00:0c:29:b0:0d:30 brd ff:ff:ff:ff:ff:ffaltname enp3s0inet 192.168.110.32/24 brd 192.168.110.255 scope global noprefixroute ens160valid_lft forever preferred_lft foreverinet 192.168.110.10/32 scope global ens160valid_lft forever preferred_lft foreverinet6 fe80::20c:29ff:feb0:d30/64 scope link noprefixroute valid_lft forever preferred_lft forever
[rootClient ~]# for ((i1;i6;i)); do curl http://192.168.110.10; done #访问正常
This is LVS test IP192.168.110.33 HostLVS-RS1
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.33 HostLVS-RS1
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.33 HostLVS-RS1
This is LVS test IP192.168.110.34 HostLVS-RS2
[rootKeepalived-01 ~]# systemctl start keepalived.service
[rootKeepalived-01 ~]# ip address show ens160 #恢复后回来
2: ens160: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc mq state UP group default qlen 1000link/ether 00:0c:29:d1:a9:eb brd ff:ff:ff:ff:ff:ffaltname enp3s0inet 192.168.110.31/24 brd 192.168.110.255 scope global noprefixroute ens160valid_lft forever preferred_lft foreverinet 192.168.110.10/32 scope global ens160valid_lft forever preferred_lft foreverinet6 fe80::20c:29ff:fed1:a9eb/64 scope link noprefixroute valid_lft forever preferred_lft forever
6.3.2.6 后端服务器故障
[rootLVS-RS1 ~]# systemctl stop nginx.service
[rootKeepalived-01 ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size4096)
Prot LocalAddress:Port Scheduler Flags- RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.110.10:80 rr- 192.168.110.34:80 Route 1 0 6 [rootClient ~]# for ((i1;i6;i)); do curl http://192.168.110.10; done
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.34 HostLVS-RS2
6.3.3 Keepalived健康检查MISC方式
6.3.3.1 编写健康脚本
[rootKeepalived-01 ~]# vim /etc/keepalived/chk_web.sh
#!/bin/bash# 检查传入的参数数量是否正确
if [ $# -ne 2 ]; thenecho Error, Parameter errorexit 1
else# 使用 nmap 进行端口扫描获取端口状态n$(nmap -Pn -p$2 -sS -vv $1 | grep ^$2 | awk {print $2})
# 判断端口是否开放if [ $n open ]; thenexit 0elseexit 1fi
fi
[rootKeepalived-01 ~]# chmod x /etc/keepalived/chk_web.sh
[rootKeepalived-01 ~]# scp /etc/keepalived/chk_web.sh 192.168.110.32:/etc/keepalived/
6.3.3.2 keepalived-01配置
[rootKeepalived-01 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {router_id LVS_node1
}
vrrp_instance LVS {state MASTERinterface ens160virtual_router_id 51priority 100advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.110.10}
}
virtual_server 192.168.110.10 80 {delay_loop 6lb_algo rrlb_kind DRprotocol TCP
real_server 192.168.110.33 80 {weight 1MISC_CHECK {misc_path /etc/keepalived/chk_web.sh 192.168.110.33 80misc_timeout 3}}
real_server 192.168.110.34 80 {weight 1MISC_CHECK {misc_path /etc/keepalived/chk_web.sh 192.168.110.34 80misc_timeout 3}}
}
[rootKeepalived-01 ~]# systemctl start keepalived.service
[rootKeepalived-01 ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size4096)
Prot LocalAddress:Port Scheduler Flags- RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.110.10:80 rr- 192.168.110.33:80 Route 1 0 0 - 192.168.110.34:80 Route 1 0 0
6.3.3.3 keepalived-02配置
[rootKeepalived-02 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {router_id LVS_node2
}
vrrp_instance LVS {state MASTERinterface ens160virtual_router_id 51priority 80advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.110.10}
}
virtual_server 192.168.110.10 80 {delay_loop 6lb_algo rrlb_kind DRprotocol TCP
real_server 192.168.110.33 80 {weight 1MISC_CHECK {misc_path /etc/keepalived/chk_web.sh 192.168.110.33 80misc_timeout 3}}
real_server 192.168.110.34 80 {weight 1MISC_CHECK {misc_path /etc/keepalived/chk_web.sh 192.168.110.34 80misc_timeout 3}}
}
[rootKeepalived-02 ~]# systemctl start keepalived.service
6.3.3.4 访问测试
[rootClient ~]# for ((i1;i6;i)); do curl http://192.168.110.10; done
This is LVS test IP192.168.110.33 HostLVS-RS1
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.33 HostLVS-RS1
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.33 HostLVS-RS1
This is LVS test IP192.168.110.34 HostLVS-RS2
6.3.3.5 模拟故障转移
[rootKeepalived-01 ~]# systemctl stop keepalived.service
[rootKeepalived-02 ~]# ip address show ens160 #VIP漂移到Keepalived-02
2: ens160: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc mq state UP group default qlen 1000link/ether 00:0c:29:b0:0d:30 brd ff:ff:ff:ff:ff:ffaltname enp3s0inet 192.168.110.32/24 brd 192.168.110.255 scope global noprefixroute ens160valid_lft forever preferred_lft foreverinet 192.168.110.10/32 scope global ens160valid_lft forever preferred_lft foreverinet6 fe80::20c:29ff:feb0:d30/64 scope link noprefixroute valid_lft forever preferred_lft forever
[rootClient ~]# for ((i1;i6;i)); do curl http://192.168.110.10; done #访问正常
This is LVS test IP192.168.110.33 HostLVS-RS1
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.33 HostLVS-RS1
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.33 HostLVS-RS1
This is LVS test IP192.168.110.34 HostLVS-RS2
[rootKeepalived-01 ~]# systemctl start keepalived.service
[rootKeepalived-01 ~]# ip address show ens160 #恢复后回来
2: ens160: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc mq state UP group default qlen 1000link/ether 00:0c:29:d1:a9:eb brd ff:ff:ff:ff:ff:ffaltname enp3s0inet 192.168.110.31/24 brd 192.168.110.255 scope global noprefixroute ens160valid_lft forever preferred_lft foreverinet 192.168.110.10/32 scope global ens160valid_lft forever preferred_lft foreverinet6 fe80::20c:29ff:fed1:a9eb/64 scope link noprefixroute valid_lft forever preferred_lft forever6.3.3.6 后端服务器故障
[rootLVS-RS1 ~]# systemctl stop nginx.service
[rootKeepalived-01 ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size4096)
Prot LocalAddress:Port Scheduler Flags- RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.110.10:80 rr- 192.168.110.34:80 Route 1 0 6 [rootClient ~]# for ((i1;i6;i)); do curl http://192.168.110.10; done
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.34 HostLVS-RS2
This is LVS test IP192.168.110.34 HostLVS-RS2
