2020欧洲杯官方投注-2020欧洲杯官方投注网址keepalived搭建主从架构、主主框架结构实例

搭建RS1:

[root@RS1 ~]# yum -y install nginx   #安装nginx
[root@RS1 ~]# vim /usr/share/nginx/html/index.html   #修改主页
    <h1> 192.168.4.118 RS1 server </h1>
[root@RS1 ~]# systemctl start nginx.service   #启动nginx服务
[root@RS1 ~]# vim RS.sh   #配置lvs-dr的脚本文件
    #!/bin/bash
    #
    vip=192.168.4.120
    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
[root@RS1 ~]# bash RS.sh start

3.3 DENCORE格局配置
3.3.1 境况概述
操作系统 负载均衡形式 VIP
RHEL7.4 DR 193.168.140.80

       2020欧洲杯官方投注-2020欧洲杯官方投注网址 1


LVS(Linux Virtual Server):Linux设想服务器,这里经过keepalived作为负载均衡器
翼虎S(Real Server):真实服务器
V福睿斯RP(Virtual Router Redundancy Protocol): 虚构路由冗余切磋, 消除局域网中配置静态网关出现单点失效现象的路由左券
2020欧洲杯官方投注-2020欧洲杯官方投注网址 2

搭建DR1:

[root@DR1 ~]# yum -y install ipvsadm keepalived   #安装ipvsadm和keepalived
[root@DR1 ~]# vim /etc/keepalived/keepalived.conf   #修改keepalived.conf配置文件
    global_defs {
       notification_email {
         root@localhost
       }
       notification_email_from keepalived@localhost
       smtp_server 127.0.0.1
       smtp_connect_timeout 30
       router_id 192.168.4.116
       vrrp_skip_check_adv_addr
       vrrp_mcast_group4 224.0.0.10
    }

    vrrp_instance VIP_1 {
        state MASTER
        interface eno16777736
        virtual_router_id 1
        priority 100
        advert_int 1
        authentication {
            auth_type PASS
            auth_pass %&hhjj99
        }
        virtual_ipaddress {
          192.168.4.120/24 dev eno16777736 label eno16777736:0
        }
    }

    virtual_server 192.168.4.120 80 {
        delay_loop 6
        lb_algo rr
        lb_kind DR
        protocol TCP

        real_server 192.168.4.118 80 {
            weight 1
            HTTP_GET {
                url {
                  path /index.html
                  status_code 200
                }
                connect_timeout 3
                nb_get_retry 3
                delay_before_retry 3
            }
        }
        real_server 192.168.4.119 80 {
            weight 1
            HTTP_GET {
                url {
                  path /index.html
                  status_code 200
                }
                connect_timeout 3
                nb_get_retry 3
                delay_before_retry 3
            }
         }
    }
[root@DR1 ~]# systemctl start keepalived
[root@DR1 ~]# ifconfig
    eno16777736: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
            inet 192.168.4.116  netmask 255.255.255.0  broadcast 192.168.4.255
            inet6 fe80::20c:29ff:fe93:270f  prefixlen 64  scopeid 0x20<link>
            ether 00:0c:29:93:27:0f  txqueuelen 1000  (Ethernet)
            RX packets 14604  bytes 1376647 (1.3 MiB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 6722  bytes 653961 (638.6 KiB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

    eno16777736:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
            inet 192.168.4.120  netmask 255.255.255.0  broadcast 0.0.0.0
            ether 00:0c:29:93:27:0f  txqueuelen 1000  (Ethernet)
[root@DR1 ~]# ipvsadm -ln
    IP Virtual Server version 1.2.1 (size=4096)
    Prot LocalAddress:Port Scheduler Flags
      -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
    TCP  192.168.4.120:80 rr
      -> 192.168.4.118:80             Route   1      0          0         
      -> 192.168.4.119:80             Route   1      0          0

 

顾客端测量检验:

[root@client ~]# for i in {1..20};do curl http://192.168.4.120;done
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
[root@client ~]# for i in {1..20};do curl http://192.168.4.121;done
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>
    <h1> 192.168.4.119 RS2 server</h1>
    <h1> 192.168.4.118 RS1 server </h1>

 

LVS1 LVS2 RS1 RS2
2020欧洲杯官方投注-2020欧洲杯官方投注网址,ens4:193.168.140.79 ens4:193.168.140.83 ens4:193.168.140.152 ens4:193.168.140.224

顾客端实行测验:

[root@client ~]# for i in {1..20};do curl http://192.168.4.120;done   #客户端正常访问
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>

[root@DR1 ~]# systemctl stop keepalived.service   #关闭DR1的keepalived服务

[root@DR2 ~]# systemctl status keepalived.service   #观察DR2,可以看到DR2已经进入MASTER状态
● keepalived.service - LVS and VRRP High Availability Monitor
   Loaded: loaded (/usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
   Active: active (running) since Tue 2018-09-04 11:33:04 CST; 7min ago
  Process: 12983 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
 Main PID: 12985 (keepalived)
   CGroup: /system.slice/keepalived.service
           ├─12985 /usr/sbin/keepalived -D
           ├─12988 /usr/sbin/keepalived -D
           └─12989 /usr/sbin/keepalived -D

Sep 04 11:37:41 happiness Keepalived_healthcheckers[12988]: SMTP alert successfully sent.
Sep 04 11:40:22 happiness Keepalived_vrrp[12989]: VRRP_Instance(VIP_1) Transition to MASTER STATE
Sep 04 11:40:23 happiness Keepalived_vrrp[12989]: VRRP_Instance(VIP_1) Entering MASTER STATE
Sep 04 11:40:23 happiness Keepalived_vrrp[12989]: VRRP_Instance(VIP_1) setting protocol VIPs.
Sep 04 11:40:23 happiness Keepalived_vrrp[12989]: Sending gratuitous ARP on eno16777736 for 192.168.4.120
Sep 04 11:40:23 happiness Keepalived_vrrp[12989]: VRRP_Instance(VIP_1) Sending/queueing gratuitous ARPs on eno16777736 for 192.168.4.120
Sep 04 11:40:23 happiness Keepalived_vrrp[12989]: Sending gratuitous ARP on eno16777736 for 192.168.4.120
Sep 04 11:40:23 happiness Keepalived_vrrp[12989]: Sending gratuitous ARP on eno16777736 for 192.168.4.120
Sep 04 11:40:23 happiness Keepalived_vrrp[12989]: Sending gratuitous ARP on eno16777736 for 192.168.4.120
Sep 04 11:40:23 happiness Keepalived_vrrp[12989]: Sending gratuitous ARP on eno16777736 for 192.168.4.120

[root@client ~]# for i in {1..20};do curl http://192.168.4.120;done   #可以看到客户端正常访问
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>
<h1> 192.168.4.119 RS2 server</h1>
<h1> 192.168.4.118 RS1 server </h1>

3.3.2 LVS
vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
qingean@163.com
}
notification_email_from admin@test.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_MASTER
}
vrrp_instance VI_1 {
state MASTER #BACKUP上修修改改为BACKUP
interface ens4
virtual_router_id 51
priority 100 #BACKUP上改变为90
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
193.168.140.80
}
}
virtual_server 193.168.140.80 80 {
delay_loop 6
lb_algo rr
lb_kind DR
nat_mask 255.255.255.255
protocol TCP
real_server 193.168.140.152 80 {
weight 10
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 193.168.140.224 80 {
weight 10
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}

DPAJERO2的搭建基本同DSportage1,首要修改一下安插文件中/etc/keepalived/keepalived.conf的state和priority:state BACKUP、priority 90. 同期大家发掘作为backup的D科迈罗2未有启用eno16777736:0的网口:

2020欧洲杯官方投注-2020欧洲杯官方投注网址 3

1 Keepalived是什么样,有啥样效劳?
1.1 Keepalived的定义
Keepalived 是三个基于V大切诺基RP左券来贯彻的LVS高可用方案
1.2 Keepalived的作用
1.2.1 通过IP漂移实现高可用
主副LVS分享贰个虚构IP,同不时候独有多少个LVS占领VIP并对外提供劳动,若该LVS不可用,则VIP漂移至另一台LVS并对外提供劳务;
1.2.2 对HavalS集群举办状态监察和控制
若RS不可用,则keepalived将其从集群中摘除,若路虎极光S恢复生机,则keepalived将其重新参预集群中。
2 Keepalived有二种方式,各种情势的一样点和分化点是何许?
2.1 Keepalived的情势种类
Keepalived有3种形式:NAT(地址转变);DLX570(直接路由);TUN(隧道)
2.2 Keepalived的相继形式的牵线
2.2.1 NAT
优点:集群中的途睿欧S能够动用任何帮衬TCP/IP操作系统,逍客S能够分配Internet的保存私有地址,唯有LVS供给多个官方的IP地址。
劣势:扩大性有限。当奥迪Q5S节点增加到十八个或越多时,LVS将产生整个系统的瓶颈,因为具备的伏乞包和答复包都亟待通过LVS再生。
2.2.2 TUN
咱俩开采,多数Internet服务(比如WEB服务器)的央浼包相当短小,而应答包平常十分的大。
可取:LVS只承担将供给包分发给ENCORES,而TiggoS将回应包间接发给客户。所以,LVS能管理很伟大的央求量,这种方法,一台载荷均衡能为抢先100台的OdysseyS服务,LVS不再是系统的瓶颈。
破绽:可是,这种办法索要持有的服务器帮衬"IP Tunneling"(IP Encapsulation)左券,作者仅在Linux系统上落到实处了那几个。
2.2.3 DR
可取:和TUN同样,LVS也只是散发须求,应答包通过独立的路由方法再次来到给客商端。与TUN相比,DLX570这种完毕形式没有要求隧道结构,因此得以采用大比比较多操作系统做为中华VS。
相差:须求LVS的网卡必得与凯雷德S的网卡在一个网段上
3 不一样情势的布署情势,验证办法分别是如何?
3.1 基本的条件需要
需要2台LVS和n(n>=2)台RS
3.1.1 LVS
设置ipvsadm(LVS管理工科具)和keepalived;
开启路由转载功效:
vim /etc/sysctl.conf
net.ipv4.ip_forward = 1
验证:
sysctl -p
net.ipv4.ip_forward = 1
3.1.2 RS
设置httpd(用于最后测量试验)
3.2 NAT方式配置
3.2.1 情状概述
操作系统 负载均衡方式 VIP NVIP
RHEL7.4 NAT 193.168.140.80 192.168.102.165

keepalived的中坚架构

3.2.2 LVS
vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
qingean@163.com #故障接受联系人
}
notification_email_from admin@test.com #故障发送给外人
smtp_server 127.0.0.1 #本机发送邮件
smtp_connect_timeout 30
router_id LVS_MASTER #BACKUP上修修改改为LVS_BACKUP
}
vrrp_instance VI_1 {
state MASTER #BACKUP上改造为BACKUP
interface ens4
virtual_router_id 51 #设想路由标记,主从一样
priority 100 #BACKUP上修修改改为90
advert_int 1
authentication {
auth_type PASS
auth_pass 1111 #骨干认证密码必需一致
}
virtual_ipaddress {
193.168.140.80 #虚拟IP(VIP)
}
}
vrrp_instance LAN_GATEWAY { #概念网关
state MASTER #BACKUP上修修改改为BACKUP
interface ens3
virtual_router_id 62 #虚构路由ID,主从同样
priority 100 #BACKUP上修改为90
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress { #ens3网关虚构IP
192.168.102.165
}
}
virtual_server 192.168.102.165 80 { #概念内网网关设想IP和端口
delay_loop 6 #检查RS时间,单位秒
lb_algo rr #安装负载调治算法,轮叫(rr)、加权轮叫(wrr)、最小连接(lc)、加权最小连接(wlc)、基于局地性最小连接(lblc)、带复制的基于局地性起码链接(lblcr)、目标地方散列(dh)和源地址散列(sh)
lb_kind NAT #设置LVS负载均衡NAT格局
persistence_timeout 50 #同一IP的三番五次60秒内被分配到同一台真正服务器(测量检验时建议改为0)
protocol TCP #使用TCP合同检查中华VS状态
real_server 192.168.102.161 80 { #第叁个网关节点
weight 3 #节点权重值
TCP_CHECK { #健检格局
connect_timeout 3 #接连超时
nb_get_retry 3 #重试次数
delay_before_retry 3 #重试间隔/S
}
}
real_server 192.168.102.162 80 { #其次个网关节点
weight 3
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
virtual_server 193.168.140.80 80{ #概念虚构IP
delay_loop 6
lb_algo rr
lb_kind NAT
persistence_timeout 50
protocol TCP
real_server 192.168.102.163 80 { #第一个RS
weight 3
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.102.164 80 { #第二个RS
weight 3
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}
3.2.3 RS
为有着SportageS增加网关为192.168.102.165:
vim /etc/sysconfig/network-scripts/ifcfg-ens3
GATEWAY=192.168.102.165
重启; 使用route –n查看是或不是成功
IPVS connection entries
pro expire state source virtual destination
TCP 01:54 FIN_WAIT 10.167.225.60:53882 193.168.140.80:80 192.168.102.163:80
TCP 00:37 NONE 10.167.225.60:0 193.168.140.80:80 192.168.102.163:80

瞩目:各节点的小时需求联合(ntpdate ntp1.aliyun.com);关闭firewalld(systemctl stop firewalld.service,systemctl disable firewalld.service),设置selinux为permissive(setenforce 0);同一时候确定保障各网卡扶助MULTICAST(多播)通信。

3.3.3 RS
为所有RS修改sysctl.conf
net.ipv4.conf.lo.arp_ignore= 1
net.ipv4.conf.lo.arp_announce= 2
net.ipv4.conf.all.arp_ignore= 1
net.ipv4.conf.all.arp_announce= 2
net.ipv4.ip_forward= 1
执行/sbin/ifconfig lo:0 193.168.140.80 broadcast 193.168.140.80 netmask 255.255.255.255
可用route –n查看是还是不是中标
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 193.168.1.1 0.0.0.0 UG 100 0 0 ens4
193.168.0.0 0.0.0.0 255.255.0.0 U 100 0 0 ens4
193.168.140.80 0.0.0.0 255.255.255.255 UH 0 0 0 lo
若不成事推行/sbin/route add -host 193.168.140.80 dev lo:0
3.4 验证格局
3.4.1 所有机器关闭防火墙:
systemctl stop firewalld
3.4.2 全部EvoqueS写入测验页和开启httpd服务
RS1:echo “RS1″ > /var/www/html/index.html
RS2:echo “RS2″ > /var/www/html/index.html
systemctl start httpd
3.4.3 主副LVS开启keepalived服务
systemctl start keepalived
3.4.4 访问
浏览器访谈
刷新会轮番体现景逸SUVS1或昂CoraS2
3.4.5 查看当前测量检验机的拜访央浼被转正到哪些服务器
ipvsadm –lcn
IPVS connection entries
pro expire state source virtual destination
TCP 01:54 FIN_WAIT 10.167.225.60:53882 193.168.140.80:80 192.168.102.163:80
TCP 00:37 NONE 10.167.225.60:0 193.168.140.80:80 192.168.102.163:80
3.4.6 测试
依傍宕掉主LVS,服务器照常职业,再宕掉Web1,那时只会显得Web2,这样就兑现IP负载均衡,高可用集群。当主LVS恢复生机后,会切换到主动服务器,假若Keepalived监察和控制模块检查测验web故障复苏后,恢复生机的主机又将此节点参预集群系统中。

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