keepalived 雙主模型

時間  2019-11-07
標籤 keepalived 模型 欄目 負載均衡 简体版
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keepalived 雙主模型

雙主模型是兩臺服務器互爲主備，即一臺爲主備，另外一臺爲備主，讓兩臺服務器並行運行，也能夠實現減輕單臺keepalived主機上的壓力。
雙主模型須要注意此時須要有2個VIP地址linux

keepalived 雙主模型實現

準備主機2臺vim

server hostname ip
keepalived s1 172.20.27.10
keepalived s2 172.20.27.11

s1 節點配置

修改配置文件bash

[root@s1 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived

global_defs {
   notification_email {
        root@mylinuxops.com
   }
   notification_email_from root@mylinuxops.com
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id s1.mylinuxops.com
   vrrp_skip_check_adv_addr
   #vrrp_strict
   vrrp_iptables
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}
# 雙主模型須要定義兩個VIP配置端，一個爲主的配置端一個爲備的配置端
vrrp_instance VI_1 {                #配置第一個實例
    state MASTER                    #定義角色爲主
    interface ens33
    virtual_router_id 27            #雙主時須要注意虛擬路由必須與另外一個虛擬路由ID不一樣
    priority 100                    #定義優先級
    advert_int 2
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    unicast_src_ip 172.20.27.10     #定義單播源地址
    unicast_peer {                  
    172.20.27.11                    #定義單播的目標地址
    }
    virtual_ipaddress {
        172.20.27.100 dev ens33 label ens33:0       #在一個實例中，vip能夠是多個，此處以綁定兩個地址爲例子，雙主模型中若是每一個主的實例中都有兩個vip，那麼當其中一個主掛了以後另外一個將獲取4個地址。
        172.20.27.101 dev ens33 label ens33:1
    }
}

vrrp_instance VI_2 {                #定義第二個實例
    state BACKUP                    #雙主模型中第二個實例的角色就爲備
    interface ens33
    virtual_router_id 37            #虛擬路由ID須要改成和第一個實例不一樣
    priority 80                     #由於爲備服務器因此優先級須要下降
    advert_int 2        
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    unicast_src_ip 172.20.27.10     #設置單播的源地址
    unicast_peer {
    172.20.27.11                    #設置單薄的目標地址
    }
    virtual_ipaddress {
        172.20.27.200 dev ens33 label ens33:2       #配置虛擬IP
        172.20.27.201 dev ens33 label ens33:3
    }
}

重啓服務服務器

[root@s1 ~]# systemctl restart keepalived

s2節點配置

修改keepalived配置文件ide

[root@s2 ~]# vim /etc/keepalived/keepalived.conf 
! Configuration File for keepalived

global_defs {
   notification_email {
        root@mylinuxops.com
   }
   notification_email_from root@mylinuxops.com
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id s2.mylinuxops.com
   vrrp_skip_check_adv_addr
   #vrrp_strict
   vrrp_iptables
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}

vrrp_instance VI_1 {
    state BACKUP
    interface ens33
    virtual_router_id 27
    priority 80
    advert_int 2
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    unicast_src_ip 172.20.27.11
    unicast_peer {
    172.20.27.10
    }
    virtual_ipaddress {
        172.20.27.100 dev ens33 label ens33:0
        172.20.27.101 dev ens33 label ens33:1
    }
}

vrrp_instance VI_2 {
    state MASTER
    interface ens33
    virtual_router_id 37
    priority 100
    advert_int 2
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    unicast_src_ip 172.20.27.11
    unicast_peer {
    172.20.27.10
    }
    virtual_ipaddress {
        172.20.27.200 dev ens33 label ens33:2
        172.20.27.201 dev ens33 label ens33:3
    }
}

重啓服務oop

[root@s2 ~]# systemctl restart keepalived

測試

查看s1 s2節點上綁定的虛擬IP信息
s1節點測試

[root@s1 ~]# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.20.27.10  netmask 255.255.0.0  broadcast 172.20.255.255
        inet6 fe80::20c:29ff:fec5:123c  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:c5:12:3c  txqueuelen 1000  (Ethernet)
        RX packets 159893  bytes 13229687 (12.6 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 36390  bytes 8038414 (7.6 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
# S1節點中 100，101爲主
ens33:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.20.27.100  netmask 255.255.255.255  broadcast 0.0.0.0
        ether 00:0c:29:c5:12:3c  txqueuelen 1000  (Ethernet)

ens33:1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.20.27.101  netmask 255.255.255.255  broadcast 0.0.0.0
        ether 00:0c:29:c5:12:3c  txqueuelen 1000  (Ethernet)

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 2  bytes 140 (140.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2  bytes 140 (140.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

s2節點rest

[root@s2 ~]# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.20.27.11  netmask 255.255.0.0  broadcast 172.20.255.255
        inet6 fe80::20c:29ff:fe4d:1ce3  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:4d:1c:e3  txqueuelen 1000  (Ethernet)
        RX packets 146792  bytes 12377811 (11.8 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 5501  bytes 486871 (475.4 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
#s2中 200，201 爲主
ens33:2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.20.27.200  netmask 255.255.255.255  broadcast 0.0.0.0
        ether 00:0c:29:4d:1c:e3  txqueuelen 1000  (Ethernet)

ens33:3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.20.27.201  netmask 255.255.255.255  broadcast 0.0.0.0
        ether 00:0c:29:4d:1c:e3  txqueuelen 1000  (Ethernet)

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 6  bytes 482 (482.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 6  bytes 482 (482.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

測試s1中止服務code

[root@s1 ~]# systemctl stop keepalived

在s2節點上查看router

[root@s2 ~]# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.20.27.11  netmask 255.255.0.0  broadcast 172.20.255.255
        inet6 fe80::20c:29ff:fe4d:1ce3  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:4d:1c:e3  txqueuelen 1000  (Ethernet)
        RX packets 162656  bytes 13744995 (13.1 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 6334  bytes 551143 (538.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
#s2節點上獲取了全部的4個地址
ens33:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.20.27.100  netmask 255.255.255.255  broadcast 0.0.0.0
        ether 00:0c:29:4d:1c:e3  txqueuelen 1000  (Ethernet)

ens33:1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.20.27.101  netmask 255.255.255.255  broadcast 0.0.0.0
        ether 00:0c:29:4d:1c:e3  txqueuelen 1000  (Ethernet)

ens33:2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.20.27.200  netmask 255.255.255.255  broadcast 0.0.0.0
        ether 00:0c:29:4d:1c:e3  txqueuelen 1000  (Ethernet)

ens33:3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.20.27.201  netmask 255.255.255.255  broadcast 0.0.0.0
        ether 00:0c:29:4d:1c:e3  txqueuelen 1000  (Ethernet)

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 6  bytes 482 (482.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 6  bytes 482 (482.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
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