Keeplived部署LVM
实验环境
| 主机IP |
环境角色 |
| 192.168.197.147 |
HTTP后端服务器RS1 |
| 192.168.197.150 |
HTTP后端服务器RS2 |
| 192.168.197.154 |
LVM调度器DR1 Keepalived主服务 |
| 192.168.197.155 |
LVM调度器DR2 Keepalived备服务 |
步骤
[root@localhost ~]# yum install -y httpd
[root@localhost ~]# vim /etc/httpd/conf/httpd.conf
......
#
ServerName localhost:80 取消注释并设置为localhost
## 开启服务并设置开机启用
[root@localhost ~]# systemctl enable --now httpd
Created symlink /etc/systemd/system/multi-user.target.wants/httpd.service → /usr/lib/systemd/system/httpd.service.
[root@localhost ~]# ss -antl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
LISTEN 0 128 *:80 *:*
LISTEN 0 128 [::]:22 [::]:*
## 添加主页文件并访问
[root@localhost ~]# cd /var/www/html/
[root@localhost html]# ls
[root@localhost html]# touch index.html
[root@localhost html]# vim index.html
[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33
TYPE=Ethernet
BOOTPROTO=static
NAME=ens33
DEVICE=ens33
ONBOOT=yes
IPADDR0=192.168.197.154 IP0为DIP
NETMASK0=255.255.255.0
GATEWAY=192.168.197.2
IPADDR1=192.168.197.250 IP1为VIP
NETMASK1=255.255.255.0
DNS1=114.114.114.114
~
# 重启网卡
[root@localhost html]# systemctl restart NetworkManager ; ifdown ens33 ; ifup ens33
[root@localhost ~]# ip a
......
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:4e:98:e3 brd ff:ff:ff:ff:ff:ff
inet 192.168.197.154/24 brd 192.168.197.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet 192.168.197.250/24 brd 192.168.197.255 scope global secondary noprefixroute ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe4e:98e3/64 scope link
valid_lft forever preferred_lft forever
[root@localhost html]# vim /etc/sysconfig/network-scripts/ifcfg-ens33
TYPE=Ethernet
BOOTPROTO=static
NAME=ens33
DEVICE=ens33
ONBOOT=yes
IPADDR=192.168.197.147
GATEWAY=192.168.197.154 网关地址指向DR的DIP
NETMASK=255.255.255.0
# 重启网卡
[root@localhost html]# systemctl restart NetworkManager ; ifdown ens33 ; ifup ens33
[root@localhost html]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.197.154 0.0.0.0 UG 100 0 0 ens33
192.168.197.0 0.0.0.0 255.255.255.0 U 100 0 0 ens33
[root@localhost html]# vim /etc/sysctl.conf
......
net.ipv4.ip_forward = 1
## 重读配置文件
[root@localhost html]# sysctl -p
net.ipv4.ip_forward = 1
[root@localhost yum.repos.d]# yum install -y ipvsadm
[root@localhost yum.repos.d]# ipvsadm -A -t 192.168.197.250:80 -s rr
[root@localhost yum.repos.d]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.197.250:80 rr
## 添加RS1与RS2到规则中
[root@localhost yum.repos.d]# ipvsadm -a -t 192.168.197.250:80 -r 192.168.197.147:80 -m
[root@localhost yum.repos.d]# ipvsadm -a -t 192.168.197.250:80 -r 192.168.197.150:80 -m
[root@localhost yum.repos.d]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.197.250:80 rr
-> 192.168.197.147:80 Masq 1 0 0
-> 192.168.197.150:80 Masq 1 0 0
## 保存配置到配置文件中
[root@localhost yum.repos.d]# ipvsadm -Sn > /etc/sysconfig/ipvsadm
[root@localhost yum.repos.d]# cat /etc/sysconfig/ipvsadm
-A -t 192.168.197.250:80 -s rr
-a -t 192.168.197.250:80 -r 192.168.197.147:80 -m -w 1
-a -t 192.168.197.250:80 -r 192.168.197.150:80 -m -w 1
[root@localhost yum.repos.d]# curl 192.168.197.250
Hello WORLD1
[root@localhost yum.repos.d]# curl 192.168.197.250
HELLO WORLD2
[root@localhost yum.repos.d]# curl 192.168.197.250
Hello WORLD1
yum -y install keepalived
## 配置keepalived主配置文件
[root@localhost keepalived]# vim keepalived.conf
! Configuration File for keepalived
global_defs {
router_id lb01
}
vrrp_instance VI_1 {
state MASTER
interface ens33
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass wangqing
}
virtual_ipaddress {
192.168.197.250
}
}
virtual_server 172.16.12.250 80 {
delay_loop 6
lb_algo rr
lb_kind DR
persistence_timeout 50
protocol TCP
real_server 192.168.197.147 80 {
weight 1
TCP_CHECK {
connect_port 80
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.197.150 80 {
weight 1
TCP_CHECK {
connect_port 80
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
# 配置VIP
[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33
TYPE=Ethernet
BOOTPROTO=static
NAME=ens33
DEVICE=ens33
ONBOOT=yes
IPADDR0=192.168.197.155
NETMASK0=255.255.255.0
GATEWAY=192.168.197.2
IPADDR1=192.168.197.250
NETMASK1=255.255.255.0
DNS1=114.114.114.114
# 重启网卡
[root@localhost ~]# systemctl restart NetworkManager ; ifdown ens33 ; ifup ens33
Connection 'ens33' successfully deactivated
......
[root@localhost ~]# ip a
......
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:06:50:c1 brd ff:ff:ff:ff:ff:ff
inet 192.168.197.155/24 brd 192.168.197.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet 192.168.197.250/24 brd 192.168.197.255 scope global secondary noprefixroute ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe06:50c1/64 scope link
valid_lft forever preferred_lft forever
# 打开流量转发
[root@localhost ~]# vim /etc/sysctl.conf
[root@localhost ~]# sysctl -p
net.ipv4.ip_forward = 1
[root@localhost yum.repos.d]# yum install -y ipvsadm
[root@localhost yum.repos.d]# ipvsadm -A -t 192.168.197.250:80 -s rr
[root@localhost yum.repos.d]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.197.250:80 rr
[root@localhost yum.repos.d]# ipvsadm -a -t 192.168.197.250:80 -r 192.168.197.147:80 -m
[root@localhost yum.repos.d]# ipvsadm -a -t 192.168.197.250:80 -r 192.168.197.150:80 -m
[root@localhost yum.repos.d]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.197.250:80 rr
-> 192.168.197.147:80 Masq 1 0 0
-> 192.168.197.150:80 Masq 1 0 0
[root@localhost keepalived]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id lb02 路由标识位，每个keepalived都不同
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
virtual_router_id 51
priority 90 级别，级别等级高的为主服务器，反之为备服务器
advert_int 1
authentication {
auth_type PASS
auth_pass 123456 设置密码，每个Keepalive保持一致
}
virtual_ipaddress {
192.168.197.250 定位VIP
}
}
virtual_server 192.168.197.250 80 {
delay_loop 6
lb_algo rr
lb_kind DR
persistence_timeout 50
protocol TCP
real_server 192.168.197.147 80 { 第一台RS配置
weight 1
TCP_CHECK {
connect_port 80
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.197.150 80 { 第二台RS配置
weight 1
TCP_CHECK {
connect_port 80
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
## 主服务器上查看发现已存在VIP
[root@localhost keepalived]# ip a
......
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:4e:98:e3 brd ff:ff:ff:ff:ff:ff
inet 192.168.197.154/24 brd 192.168.197.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet 192.168.197.250/32 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe4e:98e3/64 scope link
valid_lft forever preferred_lft forever
## 备服务器上查看 没有VIP
[root@localhost keepalived]# ip a
......
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:06:50:c1 brd ff:ff:ff:ff:ff:ff
inet 192.168.197.155/24 brd 192.168.197.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe06:50c1/64 scope link
valid_lft forever preferred_lft forever
## 主服务器上成功访问RS
[root@localhost keepalived]# curl 192.168.197.250
Hello WORLD1
[root@localhost keepalived]# curl 192.168.197.250
HELLO WORLD2
[root@localhost keepalived]# curl 192.168.197.250
Hello WORLD1
[root@localhost keepalived]# curl 192.168.197.250
HELLO WORLD2
[root@localhost keepalived]# curl 192.168.197.250
Hello WORLD1
[root@localhost keepalived]# curl 192.168.197.250
HELLO WORLD2
- 关闭RS1上的Keepalive服务，再次查看备服务器上的IP
[root@localhost keepalived]# systemctl stop keepalived
# DR1上查看ip，vip已经没有了
[root@localhost keepalived]# ip a
......
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:4e:98:e3 brd ff:ff:ff:ff:ff:ff
inet 192.168.197.154/24 brd 192.168.124.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe4e:98e3/64 scope link
valid_lft forever preferred_lft forever
# DR2上查看Ip,有2个Ip
[root@localhost ~]# ip a
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:06:50:c1 brd ff:ff:ff:ff:ff:ff
inet 192.168.197.155/24 brd 192.168.124.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet 192.168.197.250/24 scope global secondary ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe06:50c1/64 scope link
valid_lft forever preferred_lft forever
[root@localhost ~]# curl 192.168.197.250
HELLO WORLD2
[root@localhost ~]# curl 192.168.197.250
Hello WORLD1
[root@localhost ~]# curl 192.168.197.250
HELLO WORLD2
[root@localhost ~]# curl 192.168.197.250
Hello WORLD1
[root@localhost ~]# curl 192.168.124.250
HELLO WORLD2
.....
