vrrp_script高可用httpd
實驗拓撲：
HA01 192.168.150.137 MASTER
HA02 192.168.150.137 BACKUP
VIP 1921.168.150.131
實驗1：
通過touch一個文件來控制keepalived主機的優先級
HA01的配置腳本，并將此配置文件拷貝至HA02，修改MASTER –>BACKUP和優先級100–>98
! Configuration File or keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from kaadmin@void.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id node1
vrrp_mcast_group4 224.0.0.18
}
vrrp_script chk_down {
script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0" 條件判斷，當存在down文件時權重-5，此時權重值會為100-5=95<98，此臺主的會變成備的，VIP自然會漂移至HA02
interval 2 腳本檢查了2秒一次
weight -5
}
vrrp_instance VI_1 {
state MASTER
interface eno33554976
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass Iyd4q2Yg
}
virtual_ipaddress {
192.168.150.131 dev eno33554976 label eno33554976:0
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
}
keepalived]# scp keepalived.conf
實驗結果
HA01 touch一個down文件，此時VIP已經漂移至HA02
[root@localhost keepalived]# pwd
/etc/keepalived
[root@localhost keepalived]# touch down
[root@localhost keepalived]# ifconfig
eno33554976: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.137 netmask 255.255.255.0 broadcast 192.168.150.255
inet6 fe80::20c:29ff:fe87:41fd prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:87:41:fd txqueuelen 1000 (Ethernet)
RX packets 52716 bytes 20516695 (19.5 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 71277 bytes 22879699 (21.8 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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 0 (Local Loopback)
RX packets 1018 bytes 84838 (82.8 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1018 bytes 84838 (82.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
HA02狀態：
[root@localhost keepalived]# ifconfig
eno33554976: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.140 netmask 255.255.255.0 broadcast 192.168.150.255
inet6 fe80::20c:29ff:fe85:df69 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:85:df:69 txqueuelen 1000 (Ethernet)
RX packets 56220 bytes 19985917 (19.0 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 26414 bytes 2318563 (2.2 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno33554976:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.131 netmask 255.255.255.255 broadcast 0.0.0.0
ether 00:0c:29:85:df:69 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 0 (Local Loopback)
RX packets 945 bytes 77031 (75.2 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 945 bytes 77031 (75.2 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
在HA01中將down文件刪除，VIP會漂移回來
[root@localhost keepalived]# rm down
rm：是否刪除普通空文件 "down"？y
[root@localhost keepalived]# ifconfig
eno33554976: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.137 netmask 255.255.255.0 broadcast 192.168.150.255
inet6 fe80::20c:29ff:fe87:41fd prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:87:41:fd txqueuelen 1000 (Ethernet)
RX packets 52656 bytes 20511991 (19.5 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 71227 bytes 22874127 (21.8 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno33554976:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.131 netmask 255.255.255.255 broadcast 0.0.0.0
ether 00:0c:29:87:41:fd 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 0 (Local Loopback)
RX packets 1016 bytes 84732 (82.7 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1016 bytes 84732 (82.7 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
HA02變成備的
root@localhost keepalived]# ifconfig
eno33554976: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.140 netmask 255.255.255.0 broadcast 192.168.150.255
inet6 fe80::20c:29ff:fe85:df69 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:85:df:69 txqueuelen 1000 (Ethernet)
RX packets 56306 bytes 19991827 (19.0 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 26450 bytes 2326141 (2.2 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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 0 (Local Loopback)
RX packets 947 bytes 77137 (75.3 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 947 bytes 77137 (75.3 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
實驗2：
通過腳本檢測httpd服務，如果本機httpd服務停止，VIP漂移
HA01的配置腳本，并將此配置文件拷貝至HA02，修改MASTER –>BACKUP和優先級100–>98
將使用killall -0 httpd來檢測httpd服務是否停止，返回值為0則正常開啟
CentOS7最小安裝無此命令，需要yum安裝
[root@localhost keepalived]# yum -y install psmisc
已加載插件：fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.163.com
* extras: mirrors.cn99.com
* updates: mirrors.163.com
正在解決依賴關系
–> 正在檢查事務
—> 軟件包 psmisc.x86_64.0.22.20-9.el7 將被 安裝
–> 解決依賴關系完成
依賴關系解決
=====================================================================================================
Package 架構 版本 源 大小
=====================================================================================================
正在安裝:
psmisc x86_64 22.20-9.el7 base 140 k
事務概要
=====================================================================================================
安裝 1 軟件包
總下載量：140 k
安裝大小：479 k
Downloading packages:
psmisc-22.20-9.el7.x86_64.rpm | 140 kB 00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
正在安裝 : psmisc-22.20-9.el7.x86_64 1/1
驗證中 : psmisc-22.20-9.el7.x86_64 1/1
已安裝:
psmisc.x86_64 0:22.20-9.el7
完畢！
keepalived.conf配置文件
! Configuration File or keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from kaadmin@void.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id node1
vrrp_mcast_group4 224.0.0.18
}
vrrp_script chk_down {
script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
interval 2
weight -5
}
vrrp_script chk_httpd {
script "killall -0 httpd"
interval 2
weight 5
}
vrrp_instance VI_1 {
state MASTER
interface eno33554976
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass Iyd4q2Yg
}
virtual_ipaddress {
192.168.150.131 dev eno33554976 label eno33554976:0
}
track_script {
chk_down
chk_httpd
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
}
實驗結果：
HA01模擬關閉httpd服務，VIP漂移
[root@localhost keepalived]# killall httpd
[root@localhost keepalived]# ifconfig
eno33554976: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.137 netmask 255.255.255.0 broadcast 192.168.150.255
inet6 fe80::20c:29ff:fe87:41fd prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:87:41:fd txqueuelen 1000 (Ethernet)
RX packets 55077 bytes 20859322 (19.8 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 73759 bytes 23175068 (22.1 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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 0 (Local Loopback)
RX packets 1066 bytes 89212 (87.1 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1066 bytes 89212 (87.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
此時HA02狀態
[root@localhost keepalived]# ifconfig
eno33554976: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.140 netmask 255.255.255.0 broadcast 192.168.150.255
inet6 fe80::20c:29ff:fe85:df69 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:85:df:69 txqueuelen 1000 (Ethernet)
RX packets 56220 bytes 19985917 (19.0 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 26414 bytes 2318563 (2.2 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno33554976:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.131 netmask 255.255.255.255 broadcast 0.0.0.0
ether 00:0c:29:85:df:69 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 0 (Local Loopback)
RX packets 945 bytes 77031 (75.2 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 945 bytes 77031 (75.2 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
HA01開啟httpd服務，VIP還原回來
root@localhost keepalived]# systemctl start httpd.service
您在 /var/spool/mail/root 中有新郵件
[root@localhost keepalived]# ifconfig
eno33554976: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.137 netmask 255.255.255.0 broadcast 192.168.150.255
inet6 fe80::20c:29ff:fe87:41fd prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:87:41:fd txqueuelen 1000 (Ethernet)
RX packets 55188 bytes 20868036 (19.9 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 73816 bytes 23181844 (22.1 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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 0 (Local Loopback)
RX packets 1066 bytes 89212 (87.1 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1066 bytes 89212 (87.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@localhost keepalived]# ifconfig
eno33554976: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.137 netmask 255.255.255.0 broadcast 192.168.150.255
inet6 fe80::20c:29ff:fe87:41fd prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:87:41:fd txqueuelen 1000 (Ethernet)
RX packets 55192 bytes 20868368 (19.9 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 73825 bytes 23183498 (22.1 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno33554976:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.131 netmask 255.255.255.255 broadcast 0.0.0.0
ether 00:0c:29:87:41:fd 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 0 (Local Loopback)
RX packets 1068 bytes 89318 (87.2 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1068 bytes 89318 (87.2 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
此時HA02以備機存在
root@localhost keepalived]# ifconfig
eno33554976: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.140 netmask 255.255.255.0 broadcast 192.168.150.255
inet6 fe80::20c:29ff:fe85:df69 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:85:df:69 txqueuelen 1000 (Ethernet)
RX packets 56306 bytes 19991827 (19.0 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 26450 bytes 2326141 (2.2 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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 0 (Local Loopback)
RX packets 947 bytes 77137 (75.3 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 947 bytes 77137 (75.3 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
雙主httpd
實驗拓撲：
HA01：192.168.150.137 為VIP192.168.150.131的主
HA02：192.168.150.140 為VIP192.168.150.132的主
HA01配置
! Configuration File or keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from kaadmin@void.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id node1
vrrp_mcast_group4 224.0.0.18
}
vrrp_script chk_down {
script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
interval 2
weight -5
}
vrrp_script chk_httpd {
script "killall -0 httpd"
interval 2
weight 5
}
vrrp_instance VI_1 { VIP31上此臺為MASTER
state MASTER
interface eno33554976
virtual_router_id 51 router_id為51，要注意與下面的不同
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass Iyd4q2Yg
}
virtual_ipaddress {
192.168.150.131 dev eno33554976 label eno33554976:0
}
track_script {
chk_down
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
}
vrrp_instance VI_2 {
state BACKUP
interface eno33554976
virtual_router_id 52
priority 98
advert_int 1
authentication {
auth_type PASS
auth_pass Iyd4q2Yg
}
virtual_ipaddress {
192.168.150.132 dev eno33554976 label eno33554976:1
}
track_script {
chk_down
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
}
HA02配置
! Configuration File or keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from kaadmin@void.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id node1
vrrp_mcast_group4 224.0.0.18
}
vrrp_script chk_down {
script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
interval 2
weight -5
}
vrrp_script chk_httpd {
script "killall -0 httpd"
interval 2
weight 5
}
vrrp_instance VI_1 {
state BACKUP
interface eno33554976
virtual_router_id 51
priority 98
advert_int 1
authentication {
auth_type PASS
auth_pass Iyd4q2Yg
}
virtual_ipaddress {
192.168.150.131 dev eno33554976 label eno33554976:0
}
track_script {
chk_down
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
}
vrrp_instance VI_2 { 在VIP132上，此臺為主
state MASTER
interface eno33554976
virtual_router_id 52 router_id要注意和上面不同
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass Iyd4q2Yg
}
virtual_ipaddress { 新的VIP
192.168.150.132 dev eno33554976 label eno33554976:1
}
track_script {
chk_down
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
}
實驗結果：
HA01 touch一個down文件模擬keepalived關閉，兩個VIP會同時在HA02上
[root@localhost keepalived]# touch down
您在 /var/spool/mail/root 中有新郵件
[root@localhost keepalived]# ifconfig
eno33554976: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.137 netmask 255.255.255.0 broadcast 192.168.150.255
inet6 fe80::20c:29ff:fe87:41fd prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:87:41:fd txqueuelen 1000 (Ethernet)
RX packets 57086 bytes 21028080 (20.0 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 76016 bytes 23409317 (22.3 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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 0 (Local Loopback)
RX packets 1078 bytes 89848 (87.7 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1078 bytes 89848 (87.7 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
此時HA02狀態
[root@localhost keepalived]# ifconfig
eno33554976: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.140 netmask 255.255.255.0 broadcast 192.168.150.255
inet6 fe80::20c:29ff:fe85:df69 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:85:df:69 txqueuelen 1000 (Ethernet)
RX packets 60105 bytes 20410322 (19.4 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 28183 bytes 2536438 (2.4 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno33554976:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.131 netmask 255.255.255.255 broadcast 0.0.0.0
ether 00:0c:29:85:df:69 txqueuelen 1000 (Ethernet)
eno33554976:1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.132 netmask 255.255.255.255 broadcast 0.0.0.0
ether 00:0c:29:85:df:69 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 0 (Local Loopback)
RX packets 977 bytes 78727 (76.8 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 977 bytes 78727 (76.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
HA01進行down文件刪除，VIP31會漂移回來
root@localhost keepalived]# rm down
rm：是否刪除普通空文件 "down"？y
[root@localhost keepalived]# ifconfig
eno33554976: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.137 netmask 255.255.255.0 broadcast 192.168.150.255
inet6 fe80::20c:29ff:fe87:41fd prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:87:41:fd txqueuelen 1000 (Ethernet)
RX packets 57235 bytes 21038952 (20.0 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 76072 bytes 23416841 (22.3 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno33554976:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.131 netmask 255.255.255.255 broadcast 0.0.0.0
ether 00:0c:29:87:41:fd 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 0 (Local Loopback)
RX packets 1080 bytes 89954 (87.8 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1080 bytes 89954 (87.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
此時的HA02只掛載VIP32
[root@localhost keepalived]# ifconfig
eno33554976: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.140 netmask 255.255.255.0 broadcast 192.168.150.255
inet6 fe80::20c:29ff:fe85:df69 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:85:df:69 txqueuelen 1000 (Ethernet)
RX packets 60144 bytes 20413106 (19.4 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 28253 bytes 2543988 (2.4 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno33554976:1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.132 netmask 255.255.255.255 broadcast 0.0.0.0
ether 00:0c:29:85:df:69 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 0 (Local Loopback)
RX packets 979 bytes 78833 (76.9 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 979 bytes 78833 (76.9 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
HA02 touch一個down文件之后VIP32會漂移至HA01
[root@localhost keepalived]# touch down
[root@localhost keepalived]# ifconfig
eno33554976: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.140 netmask 255.255.255.0 broadcast 192.168.150.255
inet6 fe80::20c:29ff:fe85:df69 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:85:df:69 txqueuelen 1000 (Ethernet)
RX packets 60190 bytes 20416786 (19.4 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 28282 bytes 2547988 (2.4 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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 0 (Local Loopback)
RX packets 981 bytes 78939 (77.0 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 981 bytes 78939 (77.0 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
此時HA01狀態，為兩臺主的
[root@localhost keepalived]# ifconfig
eno33554976: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.137 netmask 255.255.255.0 broadcast 192.168.150.255
inet6 fe80::20c:29ff:fe87:41fd prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:87:41:fd txqueuelen 1000 (Ethernet)
RX packets 57262 bytes 21040986 (20.0 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 76112 bytes 23420885 (22.3 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno33554976:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.131 netmask 255.255.255.255 broadcast 0.0.0.0
ether 00:0c:29:87:41:fd txqueuelen 1000 (Ethernet)
eno33554976:1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.132 netmask 255.255.255.255 broadcast 0.0.0.0
ether 00:0c:29:87:41:fd 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 0 (Local Loopback)
RX packets 1082 bytes 90060 (87.9 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1082 bytes 90060 (87.9 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
HA02進行down文件刪除后VIP32恢復過來
[root@localhost keepalived]# rm down
rm：是否刪除普通空文件 "down"？y
[root@localhost keepalived]# ifconfig
eno33554976: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.140 netmask 255.255.255.0 broadcast 192.168.150.255
inet6 fe80::20c:29ff:fe85:df69 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:85:df:69 txqueuelen 1000 (Ethernet)
RX packets 60306 bytes 20425478 (19.4 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 28336 bytes 2555354 (2.4 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno33554976:1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.132 netmask 255.255.255.255 broadcast 0.0.0.0
ether 00:0c:29:85:df:69 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 0 (Local Loopback)
RX packets 983 bytes 79045 (77.1 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 983 bytes 79045 (77.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
HA01也只掛載VIP31
[root@localhost keepalived]# ifconfig
eno33554976: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.137 netmask 255.255.255.0 broadcast 192.168.150.255
inet6 fe80::20c:29ff:fe87:41fd prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:87:41:fd txqueuelen 1000 (Ethernet)
RX packets 57308 bytes 21044312 (20.0 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 76162 bytes 23425957 (22.3 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno33554976:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.150.131 netmask 255.255.255.255 broadcast 0.0.0.0
ether 00:0c:29:87:41:fd 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 0 (Local Loopback)
RX packets 1084 bytes 90166 (88.0 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1084 bytes 90166 (88.0 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
原創文章，作者：N23-蘇州-void，如若轉載，請注明出處：http://www.www58058.com/62915
如果再加上一些說明，是什么，為什么就更好了