双主模型高可用负载均衡集群的实现（keepalived+lvs-dr）
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实现keepalived双主模型lvs高可用集群
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
[[email protected]]# 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
ntpdate ntp-server-ip #时间服务器的ip
hosts文件
[[email protected] 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
主机名修改
hostnamectl set-hostname node1
keepalived.conf配置文件更改
[[email protected] keepalived]# cat keepalived.conf ! Configuration File for keepalived global_defs { notification_email { [email protected] } notification_email_from [email protected] 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
[[email protected] keepalived]# cat notify1.sh #!/bin/bash #description: An example of notify script # vip=192.168.0.200 contact=‘[email protected]‘ 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 $0) {master|backup|fault}" exit 1 ;; esac
脚本2
[[email protected] keepalived]# cat notify2.sh #!/bin/bash #description: An example of notify script # vip=192.168.0.201 contact=‘[email protected]‘ notify(){ local mailsubject="$(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
[[email protected] 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
[[email protected] 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
时间同步
ntpdate ntp-server-ip
hosts文件更改
[[email protected] 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
主机名修改
hostnamectl set-hostname node2
keepalived.conf配置文件更改
[[email protected] keepalived]# cat keepalived.conf ! Configuration File for keepalived global_defs { notification_email { [email protected] } notification_email_from [email protected] 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 } } }
通知脚本配置(同调度器A的脚本一致)
脚本1
[[email protected] keepalived]# cat notify1.sh #!/bin/bash #description: An example of notify script # vip=192.168.0.200 contact=‘[email protected]‘ 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 $0) {master|backup|fault}" exit 1 ;; esac
脚本2
[[email protected] keepalived]# cat notify2.sh #!/bin/bash #description: An example of notify script # vip=192.168.0.201 contact=‘[email protected]‘ notify(){ local mailsubject="$(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
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
[[email protected] ~]# 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
[[email protected] ~]# 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
[[email protected] ~]# 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
[[email protected] ~]# 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: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
[[email protected] ~]# 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 [[email protected] ~]# 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
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
systemctl stop keepalived [[email protected] 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.
查看ip
[[email protected] 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
调度器A操作
[[email protected] 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
查看邮件
[[email protected] 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 [email protected] Sun Jul 2 10:18:55 2017 Return-Path: <[email protected]> X-Original-To: [email protected] Delivered-To: [email protected] Date: Sun, 02 Jul 2017 10:18:55 +0800 To: [email protected] 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: [email protected] (root) Status: RO 2017-07-02 10:18:55:vrrp2 transition,node1 changed to be master
2.模拟web服务器A故障(RS1)
webA上操作
[[email protected] ~]# systemctl stop httpd
调度器A上操作
查看邮件
[[email protected] 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 [email protected] Sun Jul 2 10:28 17/642 "[node1] Realserver [192.168.0.3]:80 - DOWN" N 4 [email protected] Sun Jul 2 10:28 17/642 "[node1] Realserver [192.168.0.3]:80 - DOWN"
客户端请求查看
[[email protected] ~]# curl http://192.168.0.200 #只能访问到RS2 backend server2
调度器B上操作
[[email protected] 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 [email protected] Sun Jul 2 10:28 17/642 "[node2] Realserver [192.168.0.3]:80 - DOWN" N 4 [email protected] Sun Jul 2 10:28 17/642 "[node2] Realserver [192.168.0.3]:80 - DOWN"
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
[[email protected] 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 [email protected] Sun Jul 2 10:28 18/653 "[node1] Realserver [192.168.0.3]:80 - DOWN" 4 [email protected] Sun Jul 2 10:28 18/653 "[node1] Realserver [192.168.0.3]:80 - DOWN" >N 5 [email protected] Sun Jul 2 10:36 17/642 "[node1] Realserver [192.168.0.4]:80 - DOWN" N 6 [email protected] Sun Jul 2 10:36 17/642 "[node1] Realserver [192.168.0.4]:80 - DOWN"
查看keepalived状态
[[email protected] 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.
客户端请求
[[email protected] ~]# curl http://192.168.0.201 #请求至sorry服务器的web页面 sorry server [[email protected] ~]# curl http://192.168.0.200 sorry server
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