LVS DR SOP

1.1虚拟机地址信息
LVS-DR模式
DR1:172.31.0.29
DR2:172.31.0.28
RS1:172.31.0.25
RS2:172.31.0.26
lvs-client:172.31.0.35

1.2防火墙规则
添加vrrp协议端口号（112）

2、安装LVS+Keepalived软件
2.1、在DR1上安装ipvsadm和keepalived
yum install -y ipvsadm && yum install -y keepalived
2.2、在DR2上安装ipvsadm和keepalived
yum install -y ipvsadm && yum install -y keepalived

3、修改DR1系统配置文件
3.1、在DR1备份原来Keepalived自带的配置文件
mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
3.2、自己写入如下配置文件内容
vim /etc/keepalived/keepalived.conf
vrrp_instance VI_1 {
#nopreempt
state BACKUP
virtual_router_id 201
priority 200
interface eth0
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
garp_master_delay 10
preempt_delay 300
#debug

virtual_ipaddress {
172.31.0.201 dev eth0
}
}

virtual_server 172.31.0.201 12345 {
delay_loop 6
lb_algo wrr
lb_kind DR
persistence_timeout 300
protocol TCP

real_server 172.31.0.25 12345 {
weight 1
TCP_CHECK {
connect_timeout 10
#nb_get_retry 3
delay_before_retry 3
connect_port 12345
}
}

real_server 172.31.0.26 12345 {
weight 1
TCP_CHECK {
connect_timeout 10
#nb_get_retry 3
delay_before_retry 3
connect_port 12345
}
}
}

virtual_server 172.31.0.201 12350 {
delay_loop 6
lb_algo wrr
lb_kind DR
persistence_timeout 300
protocol TCP

real_server 172.31.0.25 12350 {
weight 1
TCP_CHECK {
connect_timeout 10
#nb_get_retry 3
delay_before_retry 3
connect_port 12350
}
}

real_server 172.31.0.26 12350 {
weight 1
TCP_CHECK {
connect_timeout 10
#nb_get_retry 3
delay_before_retry 3
connect_port 12350
}
}
}3.2.1启动keepalived并且配置开机自启
Systemctl start keepalived && systemctl enable keepalived
3.3、添加系统优化参数
3.3.1、备份sysctl.conf配置文件
cp /etc/sysctl.conf /etc/sysctl.conf.bak
3.3.2、添加如下参数
vim /etc/sysctl.conf
net.ipv4.ip_local_port_range=1024 65000
net.ipv4.tcp_mem=94500000 915000000 927000000
net.core.netdev_max_backlog=262144
net.ipv4.conf.all.arp_filter=1
#net.ipv4.conf.default.arp_filter=1
net.ipv4.conf.all.rp_filter=0
net.ipv4.conf.default.rp_filter=0
net.ipv4.tcp_max_orphans=262144
net.ipv4.tcp_max_syn_backlog=262144
net.ipv4.tcp_synack_retries=1
net.ipv4.tcp_syncookies=1
net.ipv4.tcp_tw_reuse=1
net.ipv4.tcp_tw_recycle=1
net.ipv4.tcp_max_tw_buckets=100000
net.ipv4.tcp_timestamps=0
net.ipv4.tcp_fin_timeout=30
net.ipv4.tcp_keepalive_time=600
net.ipv4.tcp_keepalive_probes=3
net.ipv4.tcp_keepalive_intvl=15
vm.swappiness=20
vm.vfs_cache_pressure=200
kernel.shmmax=2147483648
kernel.shmall=134217728
kernel.shmmni=4096
kernel.perf_event_max_sample_rate=100000
net.ipv4.ip_forward=1
#net.netfilter.nf_conntrack_max=41237300
#net.netfilter.nf_conntrack_tcp_timeout_established=180
3.3.2、添加/etc/security/limits.d/99-limits.conf参数
vim /etc/security/limits.d/99-limits.conf
root soft nofile 65535
root hard nofile 65535
* soft nofile 65535
* hard nofile 65535
root soft nproc 65535
root hard nproc 65535
* soft nproc 65535
* hard nproc 65535
root soft core 1048576
root hard core 1048576
* soft core 1048576
* hard core 1048576
3.4查看LVS主机ipvsadm策略
[root@lvs01 ~]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 172.31.0.201:12345 wrr persistent 300
-> 172.31.0.25:12345 Route 1 69 295
-> 172.31.0.26:12345 Route 1 50 180
TCP 172.31.0.201:12350 wrr persistent 300
-> 172.31.0.25:12350 Route 1 0 0
-> 172.31.0.26:12350 Route 1 3 0

4、在DR2上执行同DR1相同步骤操作
4.1、在DR2备份原来Keepalived自带的配置文件
mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
4.2、自己写入如下配置文件内容
vim /etc/keepalived/keepalived.conf
vrrp_instance VI_1 {
#nopreempt
state BACKUP
virtual_router_id 201
priority 190
interface eth0
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
garp_master_delay 10
preempt_delay 300
#debug

virtual_ipaddress {
172.31.0.201 dev eth0
}
}

virtual_server 172.31.0.201 12345 {
delay_loop 6
lb_algo wrr
lb_kind DR
persistence_timeout 300
protocol TCP

real_server 172.31.0.25 12345 {
weight 1
TCP_CHECK {
connect_timeout 10
#nb_get_retry 3
delay_before_retry 3
connect_port 12345
}
}

real_server 172.31.0.26 12345 {
weight 1
TCP_CHECK {
connect_timeout 10
#nb_get_retry 3
delay_before_retry 3
connect_port 12345
}
}
}

virtual_server 172.31.0.201 12350 {
delay_loop 6
lb_algo wrr
lb_kind DR
persistence_timeout 300
protocol TCP

real_server 172.31.0.25 12350 {
weight 1
TCP_CHECK {
connect_timeout 10
#nb_get_retry 3
delay_before_retry 3
connect_port 12350
}
}

real_server 172.31.0.26 12350 {
weight 1
TCP_CHECK {
connect_timeout 10
#nb_get_retry 3
delay_before_retry 3
connect_port 12350
}
}
}4.2.1启动keepalived并且配置开机自启
Systemctl start keepalived && systemctl enable keepalived
4.3、添加系统优化参数
4.3.1、备份sysctl.conf配置文件
cp /etc/sysctl.conf /etc/sysctl.conf.bak
4.3.2、添加如下参数
vim /etc/sysctl.conf
net.ipv4.ip_local_port_range=1024 65000
net.ipv4.tcp_mem=94500000 915000000 927000000
net.core.netdev_max_backlog=262144
net.ipv4.conf.all.arp_filter=1
#net.ipv4.conf.default.arp_filter=1
net.ipv4.conf.all.rp_filter=0
net.ipv4.conf.default.rp_filter=0
net.ipv4.tcp_max_orphans=262144
net.ipv4.tcp_max_syn_backlog=262144
net.ipv4.tcp_synack_retries=1
net.ipv4.tcp_syncookies=1
net.ipv4.tcp_tw_reuse=1
net.ipv4.tcp_tw_recycle=1
net.ipv4.tcp_max_tw_buckets=100000
net.ipv4.tcp_timestamps=0
net.ipv4.tcp_fin_timeout=30
net.ipv4.tcp_keepalive_time=600
net.ipv4.tcp_keepalive_probes=3
net.ipv4.tcp_keepalive_intvl=15
vm.swappiness=20
vm.vfs_cache_pressure=200
kernel.shmmax=2147483648
kernel.shmall=134217728
kernel.shmmni=4096
kernel.perf_event_max_sample_rate=100000
net.ipv4.ip_forward=1
#net.netfilter.nf_conntrack_max=41237300
#net.netfilter.nf_conntrack_tcp_timeout_established=180
4.3.2、添加/etc/security/limits.d/99-limits.conf参数
vim /etc/security/limits.d/99-limits.conf
root soft nofile 65535
root hard nofile 65535
* soft nofile 65535
* hard nofile 65535
root soft nproc 65535
root hard nproc 65535
* soft nproc 65535
* hard nproc 65535
root soft core 1048576
root hard core 1048576
* soft core 1048576
* hard core 1048576
4.4查看ipvsadm策略
[root@sh-gtja-lvs02 ~]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 172.31.0.201:12345 wrr persistent 300
-> 172.31.0.25:12345 Route 1 0 0
-> 172.31.0.26:12345 Route 1 0 0
TCP 172.31.0.201:12350 wrr persistent 300
-> 172.31.0.25:12350 Route 1 0 0
-> 172.31.0.26:12350 Route 1 0 0

5、在后端RS上执行如下脚本
5.1在RS1上编写LVS-DR脚本内筒如下
[root@RS1 ~]# cat lvs-dr.sh
# vim /usr/local/sbin/lvs_dr_rs.sh
#! /bin/bash
vip=172.31.0.201
ifconfig lo:0 $vip broadcast $vip netmask 255.255.255.255 up
route add -host $vip eth0:0
echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
5.2.1设置脚本开机自启
vim /etc/rc.d/rc.local
bash /root/lvs_dr_rs.sh
chmod +x /etc/rc.d/rc.local
5.2在RS2上编写LVS-DR脚本内筒如下
[root@RS2 ~]# cat lvs-dr.sh
# vim /usr/local/sbin/lvs_dr_rs.sh
#! /bin/bash

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