一、拓扑图
二、环境准备
两台负载均衡调度器,两台web服务器。
调度器A环境:
VS:一张网卡
DIP:192.168.0.7/24
VIP(主):192.168.0.200
VIP(备):192.168.0.201
软件包:yum install -y keepalived ipvsadm nginx(作用:sorry-server服务)
调度器B环境:
VS:一张网卡
DIP:192.168.0.8/24
VIP(主):192.168.0.201
VIP(备):192.168.0.200
软件包:yum install -y keepalived ipvsadm nginx(作用:sorry-server服务)
web服务器A环境:
RS1:192.168.0.3
lo:0:192.168.0.200
lo:1:192.168.0.201
软件包:yum install -y httpd
web服务器B环境:
RS1:192.168.0.4
lo:0:192.168.0.200
lo:1:192.168.0.201
软件包:yum install -y httpd
三、配置
调度器A配置
主要操作:ip配置,时间同步、hosts文件更改,修改主机名(确保主从节点能够通信)、keepalived.conf配置文件更改,通知脚本配置(两个脚本),ipvsadm规则查看
ip配置
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[root@node1keepalived]
# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
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 qlen 1000
link
/ether
00:0c:29:0c:d2:06 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.7
/24
brd 192.168.0.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.0.200
/24
scope global secondary ens33:1
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe0c:d206
/64
scope link
valid_lft forever preferred_lft forever
|
时间同步
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ntpdate ntp-server-ip
#时间服务器的ip
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hosts文件
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[root@node1 keepalived]
# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 node1
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 node1
192.168.0.8 node2
192.168.0.7 node1
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主机名修改
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hostnamectl
set
-
hostname
node1
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keepalived.conf配置文件更改
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[root@localhost keepalived]
# cat keepalived.conf
! Configuration File
for
keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from keepalived@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 10
router_id node1
vrrp_mcast_group4 224.0.0.223
}
vrrp_instance VI_1 {
state MASTER
interface ens33
virtual_router_id 51
priority 110
advert_int 1
authentication {
auth_type PASS
auth_pass JzvnmfkY
}
virtual_ipaddress {
192.168.0.200
/24
dev ens33 label ens33:1
}
notify_master
"/etc/keepalived/notify1.sh master"
notify_backup
"/etc/keepalived/notify1.sh backup"
notify_fault
"/etc/keepalived/notify1.sh fault"
}
virtual_server 192.168.0.200 80 {
delay_loop 3
lb_algo wrr
lb_kind DR
protocol TCP
sorry_server 127.0.0.1 80
real_server 192.168.0.3 80 {
weight 2
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.0.4 80 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
vrrp_instance VI_2 {
state BACKUP
interface ens33
virtual_router_id 52
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass JzvnmfkY
}
virtual_ipaddress {
192.168.0.201
/24
dev ens33 label ens33:2
}
notify_master
"/etc/keepalived/notify2.sh master"
notify_backup
"/etc/keepalived/notify2.sh backup"
notify_fault
"/etc/keepalived/notify2.sh fault"
}
virtual_server 192.168.0.201 80 {
delay_loop 3
lb_algo wrr
lb_kind DR
protocol TCP
sorry_server 127.0.0.1 80
real_server 192.168.0.3 80 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.0.4 80 {
weight 2
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
|
通知脚本配置
脚本1
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[root@node1 keepalived]
# cat notify1.sh
#!/bin/bash
#description: An example of notify script
#
vip=192.168.0.200
contact=
'root@localhost'
notify(){
local
mailsubject=
"$(hostname) to be $1:$vip floating"
local
mailbody=
"$(date +'%F %T'):vrrp1 transition,$(hostname) changed to be $1"
echo
"$mailbody"
| mail -s
"$mailsubject"
$contact
}
case
$1
in
master)
notify master
;;
backup)
notify backup
;;
fault)
notify fault
;;
*)
echo
"Usage:$(basename $0) {master|backup|fault}"
exit
1
;;
esac
|
脚本2
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[root@node1 keepalived]
# cat notify2.sh
#!/bin/bash
#description: An example of notify script
#
vip=192.168.0.201
contact=
'root@localhost'
notify(){
local
mailsubject=
"$(hostname) to be $1:$vip floating"
local
mailbody=
"$(date +'%F %T'):vrrp2 transition,$(hostname) changed to be $1"
echo
"$mailbody"
| mail -s
"$mailsubject"
$contact
}
case
$1
in
master)
notify master
;;
backup)
notify backup
;;
fault)
notify fault
;;
*)
echo
"Usage:$(basename $0) {master|backup|fault}"
exit
1
;;
esac
|
ipvsadm规则查看
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[root@node1 keepalived]
# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.0.200:80 wrr
-> 192.168.0.3:80 Route 2 0 0
-> 192.168.0.4:80 Route 1 0 0
TCP 192.168.0.201:80 wrr
-> 192.168.0.3:80 Route 1 0 0
-> 192.168.0.4:80 Route 2 0 0
|
调度器B配置
主要操作:ip配置,时间同步、hosts文件更改,修改主机名(确保主从节点能够通信)、keepalived.conf配置文件更改,通知脚本配置(两个脚本),ipvsadm规则查看
ip配置
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[root@node2 keepalived]
# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
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 qlen 1000
link
/ether
00:0c:29:3f:e3:9e brd ff:ff:ff:ff:ff:ff
inet 192.168.0.8
/24
brd 192.168.0.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.0.201
/24
scope global secondary ens33:2
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe3f:e39e
/64
scope link
valid_lft forever preferred_lft forever
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时间同步
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ntpdate ntp-server-ip
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hosts文件更改
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[root@node2 keepalived]
# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 node2
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 node2
192.168.0.7 node1
192.168.0.8 node2
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主机名修改
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hostnamectl
set
-
hostname
node2
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keepalived.conf配置文件更改
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[root@localhost keepalived]
# cat keepalived.conf
! Configuration File
for
keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from keepalived@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 10
router_id node2
vrrp_mcast_group4 224.0.0.223
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass JzvnmfkY
}
virtual_ipaddress {
192.168.0.200
/24
dev ens33 label ens33:1
}
notify_master
"/etc/keepalived/notify1.sh master"
notify_backup
"/etc/keepalived/notify1.sh backup"
notify_fault
"/etc/keepalived/notify1.sh fault"
}
virtual_server 192.168.0.200 80 {
delay_loop 3
lb_algo wrr
lb_kind DR
protocol TCP
sorry_server 127.0.0.1 80
real_server 192.168.0.3 80 {
weight 2
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.0.4 80 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
vrrp_instance VI_2 {
state MASTER
interface ens33
virtual_router_id 52
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass JzvnmfkY
}
virtual_ipaddress {
192.168.0.201
/24
dev ens33 label ens33:2
}
notify_master
"/etc/keepalived/notify2.sh master"
notify_backup
"/etc/keepalived/notify2.sh backup"
notify_fault
"/etc/keepalived/notify2.sh fault"
}
virtual_server 192.168.0.201 80 {
delay_loop 3
lb_algo wrr
lb_kind DR
protocol TCP
sorry_server 127.0.0.1 80
real_server 192.168.0.3 80 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.0.4 80 {
weight 2
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
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通知脚本配置(同调度器A的脚本一致)
脚本1
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[root@node2 keepalived]
# cat notify1.sh
#!/bin/bash
#description: An example of notify script
#
vip=192.168.0.200
contact=
'root@localhost'
notify(){
local
mailsubject=
"$(hostname) to be $1:$vip floating"
local
mailbody=
"$(date +'%F %T'):vrrp1 transition,$(hostname) changed to be $1"
echo
"$mailbody"
| mail -s
"$mailsubject"
$contact
}
case
$1
in
master)
notify master
;;
backup)
notify backup
;;
fault)
notify fault
;;
*)
echo
"Usage:$(basename $0) {master|backup|fault}"
exit
1
;;
esac
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脚本2
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[root@node2 keepalived]
# cat notify2.sh
#!/bin/bash
#description: An example of notify script
#
vip=192.168.0.201
contact=
'root@localhost'
notify(){
local
mailsubject=
"$(hostname) to be $1:$vip floating"
local
mailbody=
"$(date +'%F %T'):vrrp2 transition,$(hostname) changed to be $1"
echo
"$mailbody"
| mail -s
"$mailsubject"
$contact
}
case
$1
in
master)
notify master
;;
backup)
notify backup
;;
fault)
notify fault
;;
*)
echo
"Usage:$(basename $0) {master|backup|fault}"
exit
1
;;
esac
|
web服务器A配置
ip配置
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1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
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
inet 192.168.0.201
/32
brd 192.168.0.201 scope global lo:1
valid_lft forever preferred_lft forever
inet 192.168.0.200
/32
brd 192.168.0.200 scope global lo:0
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 qlen 1000
link
/ether
00:0c:29:ab:50:14 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.4
/24
brd 192.168.0.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:feab:5014
/64
scope link
valid_lft forever preferred_lft forever
|
lvs-dr-预配置脚本
脚本1
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[root@localhost ~]
# cat vip200-setrs.sh
#!/bin/bash
#
vip=192.168.0.200
mask=
'255.255.255.255'
case
$1
in
start)
echo
1 >
/proc/sys/net/ipv4/conf/all/arp_ignore
echo
1 >
/proc/sys/net/ipv4/conf/lo/arp_ignore
echo
2 >
/proc/sys/net/ipv4/conf/all/arp_announce
echo
2 >
/proc/sys/net/ipv4/conf/lo/arp_announce
ifconfig
lo:0 $vip netmask $mask broadcast $vip up
route add -host $vip dev lo:0
;;
stop)
ifconfig
lo:0 down
echo
0 >
/proc/sys/net/ipv4/conf/all/arp_ignore
echo
0 >
/proc/sys/net/ipv4/conf/lo/arp_ignore
echo
0 >
/proc/sys/net/ipv4/conf/all/arp_announce
echo
0 >
/proc/sys/net/ipv4/conf/lo/arp_announce
;;
*)
echo
"Usage $(basename $0) start|stop"
exit
1
;;
esac
|
脚本2
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[root@localhost ~]
# cat vip201-setrs.sh
#!/bin/bash
#
vip=192.168.0.201
mask=
'255.255.255.255'
case
$1
in
start)
echo
1 >
/proc/sys/net/ipv4/conf/all/arp_ignore
echo
1 >
/proc/sys/net/ipv4/conf/lo/arp_ignore
echo
2 >
/proc/sys/net/ipv4/conf/all/arp_announce
echo
2 >
/proc/sys/net/ipv4/conf/lo/arp_announce
ifconfig
lo:1 $vip netmask $mask broadcast $vip up
route add -host $vip dev lo:1
;;
stop)
ifconfig
lo:1 down
echo
0 >
/proc/sys/net/ipv4/conf/all/arp_ignore
echo
0 >
/proc/sys/net/ipv4/conf/lo/arp_ignore
echo
0 >
/proc/sys/net/ipv4/conf/all/arp_announce
echo
0 >
/proc/sys/net/ipv4/conf/lo/arp_announce
;;
*)
echo
"Usage $(basename $0) start|stop"
exit
1
;;
esac
|
web服务器B配置
ip配置
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[root@localhost ~]
# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
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
inet 192.168.0.201
/32
brd 192.168.0.201 scope global lo:1
valid_lft forever preferred_lft forever
inet 192.168.0.200
/32
brd 192.168.0.200 scope global lo:0
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 qlen 1000
link
/ether
00:0c:29:ab:50:14 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.4
/24
brd 192.168.0.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:feab:5014
/64
scope link
valid_lft forever preferred_lft forever
|
lvs-dr-预设脚本
脚本内容同web服务A相同,拷贝过去即可
vip200-setrs.sh vip201-setrs.sh
客户端测试
ip配置
[root@localhost ~]# ip a
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1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
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 qlen 1000
link
/ether
00:0c:29:d0:37:77 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.14
/24
brd 192.168.0.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fed0:3777
/64
scope link
valid_lft forever preferred_lft forever
|
curl测试
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[root@localhost ~]
# for i in {1..10};do curl http://192.168.0.200;done
backend server1
backend server1
backend server2
backend server1
backend server1
backend server2
backend server1
backend server1
backend server2
backend server1
[root@localhost ~]
# for i in {1..10};do curl http://192.168.0.201;done
backend server1
backend server2
backend server2
backend server1
backend server2
backend server2
backend server1
backend server2
backend server2
backend server1
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四、健康状态查看以及故障排查参考方式
方式1:查看keepalived的切换过程
systemctl status keepalived
方式2:mail命令查看邮件
方式3:查看web服务器日志
tail /var/log/httpd/access_log
tail /var/log/httpd/error_log
五、模拟故障
1.模拟调度器B故障
调度器B上操作
停止keepalived服务
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systemctl stop keepalived
[root@node2 keepalived]
# systemctl status keepalived #分析以下信息,VIP2已移除
Jul 02 10:18:53 node2 systemd[1]: Stopping LVS and VRRP High Availability Monitor...
Jul 02 10:18:53 node2 Keepalived_vrrp[50773]: VRRP_Instance(VI_2) sending 0 priority
Jul 02 10:18:53 node2 Keepalived_vrrp[50773]: VRRP_Instance(VI_2) removing protocol VIPs.
Jul 02 10:18:53 node2 systemd[1]: Stopped LVS and VRRP High Availability Monitor.
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查看ip
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[root@node2 keepalived]
# ip a #VIP2移除
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
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 qlen 1000
link
/ether
00:0c:29:3f:e3:9e brd ff:ff:ff:ff:ff:ff
inet 192.168.0.8
/24
brd 192.168.0.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe3f:e39e
/64
scope link
valid_lft forever preferred_lft forever
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调度器A操作
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[root@node1 keepalived]
# systemctl status keepalived #分析以下信息,可知VIP漂移到调度A
● keepalived.service - LVS and VRRP High Availability Monitor
Loaded: loaded (
/usr/lib/systemd/system/keepalived
.service; enabled; vendor preset: disabled)
Active: active (running) since Sun 2017-07-02 10:07:36 CST; 17min ago
Process: 20019 ExecStart=
/usr/sbin/keepalived
$KEEPALIVED_OPTIONS (code=exited, status=0
/SUCCESS
)
Main PID: 20020 (keepalived)
CGroup:
/system
.slice
/keepalived
.service
├─20020
/usr/sbin/keepalived
-D
├─20021
/usr/sbin/keepalived
-D
└─20022
/usr/sbin/keepalived
-D
Jul 02 10:07:37 node1 Keepalived_vrrp[20022]: Opening script
file
/etc/keepalived/notify1
.sh
Jul 02 10:07:37 node1 Keepalived_healthcheckers[20021]: Netlink reflector reports IP 192.168.0.200 added
Jul 02 10:07:42 node1 Keepalived_vrrp[20022]: VRRP_Instance(VI_1) Sending gratuitous ARPs on ens33
for
192.168.0.200
Jul 02 10:18:54 node1 Keepalived_vrrp[20022]: VRRP_Instance(VI_2) Transition to MASTER STATE
Jul 02 10:18:55 node1 Keepalived_vrrp[20022]: VRRP_Instance(VI_2) Entering MASTER STATE
Jul 02 10:18:55 node1 Keepalived_vrrp[20022]: VRRP_Instance(VI_2) setting protocol VIPs.
Jul 02 10:18:55 node1 Keepalived_vrrp[20022]: VRRP_Instance(VI_2) Sending gratuitous ARPs on ens33
for
192.168.0.201
Jul 02 10:18:55 node1 Keepalived_vrrp[20022]: Opening script
file
/etc/keepalived/notify2
.sh
Jul 02 10:18:55 node1 Keepalived_healthcheckers[20021]: Netlink reflector reports IP 192.168.0.201 added
Jul 02 10:19:00 node1 Keepalived_vrrp[20022]: VRRP_Instance(VI_2) Sending gratuitous ARPs on ens33
for
192.168.0.201
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查看邮件
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[root@node1 keepalived]
# mail #node1成为VIP192.168.0.201的主节点
Heirloom Mail version 12.5 7
/5/10
. Type ?
for
help.
"/var/spool/mail/root"
: 1 message
> 1 root Sun Jul 2 10:18 19
/702
"node1 to be master:192.168.0.201 floating"
& 1
Message 1:
From root@node1.localdomain Sun Jul 2 10:18:55 2017
Return-Path: <root@node1.localdomain>
X-Original-To: root@localhost
Delivered-To: root@localhost.localdomain
Date: Sun, 02 Jul 2017 10:18:55 +0800
To: root@localhost.localdomain
Subject: node1 to be master:192.168.0.201 floating
User-Agent: Heirloom mailx 12.5 7
/5/10
Content-Type: text
/plain
; charset=us-ascii
From: root@node1.localdomain (root)
Status: RO
2017-07-02 10:18:55:vrrp2 transition,node1 changed to be master
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2.模拟web服务器A故障(RS1)
webA上操作
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[root@localhost ~]
# systemctl stop httpd
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调度器A上操作
查看邮件
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[root@node1 keepalived]
# mail #分析以下信息,可知RS1宕机
Heirloom Mail version 12.5 7
/5/10
. Type ?
for
help.
"/var/spool/mail/root"
: 4 messages 2 new
1 root Sun Jul 2 10:18 19
/702
"node1 to be master:192.168.0.201 floating"
2 root Sun Jul 2 10:28 19
/702
"node1 to be backup:192.168.0.201 floating"
>N 3 keepalived@localhost Sun Jul 2 10:28 17
/642
"[node1] Realserver [192.168.0.3]:80 - DOWN"
N 4 keepalived@localhost Sun Jul 2 10:28 17
/642
"[node1] Realserver [192.168.0.3]:80 - DOWN"
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客户端请求查看
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[root@localhost ~]
# curl http://192.168.0.200 #只能访问到RS2
backend server2
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调度器B上操作
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[root@node2 keepalived]
# mail #分析以下信息,可知RS1宕机
Heirloom Mail version 12.5 7
/5/10
. Type ?
for
help.
"/var/spool/mail/root"
: 4 messages 2 new
1 root Sun Jul 2 10:28 19
/702
"node2 to be backup:192.168.0.200 floating"
2 root Sun Jul 2 10:28 19
/702
"node2 to be master:192.168.0.201 floating"
>N 3 keepalived@localhost Sun Jul 2 10:28 17
/642
"[node2] Realserver [192.168.0.3]:80 - DOWN"
N 4 keepalived@localhost Sun Jul 2 10:28 17
/642
"[node2] Realserver [192.168.0.3]:80 - DOWN"
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3.模拟web服务双机故障
RS1和RS2停止web服务
调度器A上操作
查看邮件 #分析以下信息,可知双机宕机
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[root@node1 keepalived]
# mail
Heirloom Mail version 12.5 7
/5/10
. Type ?
for
help.
"/var/spool/mail/root"
: 6 messages 2 new
1 root Sun Jul 2 10:18 19
/702
"node1 to be master:192.168.0.201 floating"
2 root Sun Jul 2 10:28 19
/702
"node1 to be backup:192.168.0.201 floating"
3 keepalived@localhost Sun Jul 2 10:28 18
/653
"[node1] Realserver [192.168.0.3]:80 - DOWN"
4 keepalived@localhost Sun Jul 2 10:28 18
/653
"[node1] Realserver [192.168.0.3]:80 - DOWN"
>N 5 keepalived@localhost Sun Jul 2 10:36 17
/642
"[node1] Realserver [192.168.0.4]:80 - DOWN"
N 6 keepalived@localhost Sun Jul 2 10:36 17
/642
"[node1] Realserver [192.168.0.4]:80 - DOWN"
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查看keepalived状态
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[root@node1 keepalived]
# systemctl status keepalived #分析以下信息,双机宕机,启动sorry服务器
● keepalived.service - LVS and VRRP High Availability Monitor
Loaded: loaded (
/usr/lib/systemd/system/keepalived
.service; enabled; vendor preset: disabled)
Active: active (running) since Sun 2017-07-02 10:07:36 CST; 30min ago
Process: 20019 ExecStart=
/usr/sbin/keepalived
$KEEPALIVED_OPTIONS (code=exited, status=0
/SUCCESS
)
Main PID: 20020 (keepalived)
CGroup:
/system
.slice
/keepalived
.service
├─20020
/usr/sbin/keepalived
-D
├─20021
/usr/sbin/keepalived
-D
└─20022
/usr/sbin/keepalived
-D
Jul 02 10:36:31 node1 Keepalived_healthcheckers[20021]: Removing alive servers from the pool
for
VS [192.168.0.200]:80
Jul 02 10:36:31 node1 Keepalived_healthcheckers[20021]: Remote SMTP server [127.0.0.1]:25 connected.
Jul 02 10:36:31 node1 Keepalived_healthcheckers[20021]: SMTP alert successfully sent.
Jul 02 10:36:32 node1 Keepalived_healthcheckers[20021]: Error connecting server [192.168.0.4]:80.
Jul 02 10:36:32 node1 Keepalived_healthcheckers[20021]: Removing service [192.168.0.4]:80 from VS [192.168.0.201]:80
Jul 02 10:36:32 node1 Keepalived_healthcheckers[20021]: Lost quorum 1-0=1 > 0
for
VS [192.168.0.201]:80
Jul 02 10:36:32 node1 Keepalived_healthcheckers[20021]: Adding sorry server [127.0.0.1]:80 to VS [192.168.0.201]:80
Jul 02 10:36:32 node1 Keepalived_healthcheckers[20021]: Removing alive servers from the pool
for
VS [192.168.0.201]:80
Jul 02 10:36:32 node1 Keepalived_healthcheckers[20021]: Remote SMTP server [127.0.0.1]:25 connected.
Jul 02 10:36:32 node1 Keepalived_healthcheckers[20021]: SMTP alert successfully sent.
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客户端请求
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[root@localhost ~]
# curl http://192.168.0.201 #请求至sorry服务器的web页面
sorry server
[root@localhost ~]
# curl http://192.168.0.200
sorry server
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