作者：尹正杰
版权声明：原创作品，谢绝转载！否则将追究法律责任。
一.安装keepalived和haproxy软件服务
1>.安装ubantu系统
博主推荐阅读:
https://www.cnblogs.com/yinzhengjie/p/12180899.html
2>.部署架构
haproxy101.yinzhengjie.org.cn
keepalived
haproxy201.yinzhengjie.org.cn
keepalived
3>.安装haproxy和keepalived软件
root@haproxy101:~# apt-get -y install haproxy keepalived
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
ipvsadm libgdbm5 liblua5.3-0 libperl5.26 libsensors4 libsnmp-base libsnmp30 perl-modules-5.26
Suggested packages:
vim-haproxy haproxy-doc heartbeat ldirectord gdbm-l10n lm-sensors snmp-mibs-downloader
The following NEW packages will be installed:
haproxy ipvsadm keepalived libgdbm5 liblua5.3-0 libperl5.26 libsensors4 libsnmp-base libsnmp30 perl-modules-5.26
0 upgraded, 10 newly installed, 0 to remove and 19 not upgraded.
Need to get 9,008 kB of archives.
After this operation, 49.1 MB of additional disk space will be used.
Get:1 http://mirrors.aliyun.com/ubuntu bionic-security/main amd64 liblua5.3-0 amd64 5.3.3-1ubuntu0.18.04.1 [115 kB]
Get:2 http://mirrors.aliyun.com/ubuntu bionic-security/main amd64 haproxy amd64 1.8.8-1ubuntu0.9 [1,117 kB]
Get:3 http://mirrors.aliyun.com/ubuntu bionic-security/main amd64 perl-modules-5.26 all 5.26.1-6ubuntu0.3 [2,763 kB]
Get:4 http://mirrors.aliyun.com/ubuntu bionic/main amd64 libgdbm5 amd64 1.14.1-6 [26.0 kB]
Get:5 http://mirrors.aliyun.com/ubuntu bionic-security/main amd64 libperl5.26 amd64 5.26.1-6ubuntu0.3 [3,527 kB]
Get:6 http://mirrors.aliyun.com/ubuntu bionic/main amd64 libsensors4 amd64 1:3.4.0-4 [28.8 kB]
Get:7 http://mirrors.aliyun.com/ubuntu bionic-updates/main amd64 libsnmp-base all 5.7.3+dfsg-1.8ubuntu3.3 [224 kB]
Get:8 http://mirrors.aliyun.com/ubuntu bionic-updates/main amd64 libsnmp30 amd64 5.7.3+dfsg-1.8ubuntu3.3 [929 kB]
Get:9 http://mirrors.aliyun.com/ubuntu bionic-security/main amd64 keepalived amd64 1:1.3.9-1ubuntu0.18.04.2 [244 kB]
Get:10 http://mirrors.aliyun.com/ubuntu bionic-updates/main amd64 ipvsadm amd64 1:1.28-3ubuntu0.18.04.1 [35.5 kB]
Fetched 9,008 kB in 3s (3,181 kB/s)
Selecting previously unselected package liblua5.3-0:amd64.
(Reading database ... 67311 files and directories currently installed.)
Preparing to unpack .../0-liblua5.3-0_5.3.3-1ubuntu0.18.04.1_amd64.deb ...
Unpacking liblua5.3-0:amd64 (5.3.3-1ubuntu0.18.04.1) ...
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Preparing to unpack .../1-haproxy_1.8.8-1ubuntu0.9_amd64.deb ...
Unpacking haproxy (1.8.8-1ubuntu0.9) ...
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Unpacking libsensors4:amd64 (1:3.4.0-4) ...
Selecting previously unselected package libsnmp-base.
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Selecting previously unselected package keepalived.
Preparing to unpack .../8-keepalived_1%3a1.3.9-1ubuntu0.18.04.2_amd64.deb ...
Unpacking keepalived (1:1.3.9-1ubuntu0.18.04.2) ...
Selecting previously unselected package ipvsadm.
Preparing to unpack .../9-ipvsadm_1%3a1.28-3ubuntu0.18.04.1_amd64.deb ...
Unpacking ipvsadm (1:1.28-3ubuntu0.18.04.1) ...
Setting up ipvsadm (1:1.28-3ubuntu0.18.04.1) ...
Setting up perl-modules-5.26 (5.26.1-6ubuntu0.3) ...
Setting up libgdbm5:amd64 (1.14.1-6) ...
Setting up libsnmp-base (5.7.3+dfsg-1.8ubuntu3.3) ...
Setting up libperl5.26:amd64 (5.26.1-6ubuntu0.3) ...
Setting up libsensors4:amd64 (1:3.4.0-4) ...
Setting up liblua5.3-0:amd64 (5.3.3-1ubuntu0.18.04.1) ...
Setting up haproxy (1.8.8-1ubuntu0.9) ...
Created symlink /etc/systemd/system/multi-user.target.wants/haproxy.service → /lib/systemd/system/haproxy.service.
Setting up libsnmp30:amd64 (5.7.3+dfsg-1.8ubuntu3.3) ...
Setting up keepalived (1:1.3.9-1ubuntu0.18.04.2) ...
Created symlink /etc/systemd/system/multi-user.target.wants/keepalived.service → /lib/systemd/system/keepalived.service.
Processing triggers for rsyslog (8.32.0-1ubuntu7) ...
Processing triggers for systemd (240-6ubuntu5) ...
Processing triggers for man-db (2.8.5-2) ...
Processing triggers for dbus (1.12.12-1ubuntu1) ...
Processing triggers for libc-bin (2.29-0ubuntu2) ...
root@haproxy101:~#
root@haproxy101:~# apt-get -y install haproxy keepalived
root@haproxy201:~# apt-get -y install haproxy keepalived
Reading package lists... Done
Building dependency tree
Reading state information... Done
haproxy is already the newest version (1.8.8-1ubuntu0.9).
The following additional packages will be installed:
ipvsadm libgdbm5 libperl5.26 libsensors4 libsnmp-base libsnmp30 perl-modules-5.26
Suggested packages:
heartbeat ldirectord gdbm-l10n lm-sensors snmp-mibs-downloader
The following NEW packages will be installed:
ipvsadm keepalived libgdbm5 libperl5.26 libsensors4 libsnmp-base libsnmp30 perl-modules-5.26
upgraded, 8 newly installed, 0 to remove and 19 not upgraded.
Need to get 7,777 kB of archives.
After this operation, 46.2 MB of additional disk space will be used.
Get:1 http://mirrors.aliyun.com/ubuntu bionic-security/main amd64 perl-modules-5.26 all 5.26.1-6ubuntu0.3 [2,763 kB]
Get:2 http://mirrors.aliyun.com/ubuntu bionic/main amd64 libgdbm5 amd64 1.14.1-6 [26.0 kB]
Get:3 http://mirrors.aliyun.com/ubuntu bionic-security/main amd64 libperl5.26 amd64 5.26.1-6ubuntu0.3 [3,527 kB]
Get:4 http://mirrors.aliyun.com/ubuntu bionic/main amd64 libsensors4 amd64 1:3.4.0-4 [28.8 kB]
Get:5 http://mirrors.aliyun.com/ubuntu bionic-updates/main amd64 libsnmp-base all 5.7.3+dfsg-1.8ubuntu3.3 [224 kB]
Get:6 http://mirrors.aliyun.com/ubuntu bionic-updates/main amd64 libsnmp30 amd64 5.7.3+dfsg-1.8ubuntu3.3 [929 kB]
Get:7 http://mirrors.aliyun.com/ubuntu bionic-security/main amd64 keepalived amd64 1:1.3.9-1ubuntu0.18.04.2 [244 kB]
Get:8 http://mirrors.aliyun.com/ubuntu bionic-updates/main amd64 ipvsadm amd64 1:1.28-3ubuntu0.18.04.1 [35.5 kB]
Fetched 7,777 kB in 1s (6,896 kB/s)
Selecting previously unselected package perl-modules-5.26.
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Selecting previously unselected package keepalived.
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Setting up perl-modules-5.26 (5.26.1-6ubuntu0.3) ...
Setting up libgdbm5:amd64 (1.14.1-6) ...
Setting up libsnmp-base (5.7.3+dfsg-1.8ubuntu3.3) ...
Setting up libperl5.26:amd64 (5.26.1-6ubuntu0.3) ...
Setting up libsensors4:amd64 (1:3.4.0-4) ...
Setting up libsnmp30:amd64 (5.7.3+dfsg-1.8ubuntu3.3) ...
Setting up keepalived (1:1.3.9-1ubuntu0.18.04.2) ...
Created symlink /etc/systemd/system/multi-user.target.wants/keepalived.service → /lib/systemd/system/keepalived.service.
Processing triggers for systemd (240-6ubuntu5) ...
Processing triggers for man-db (2.8.5-2) ...
Processing triggers for dbus (1.12.12-1ubuntu1) ...
Processing triggers for libc-bin (2.29-0ubuntu2) ...
root@haproxy201:~#
root@haproxy201:~# apt-get -y install haproxy keepalived
二.配置keepalived服务
1>.编辑keepalived的配置文件
root@haproxy101:~# cp /usr/share/doc/keepalived/samples/keepalived.conf.sample /etc/keepalived/keepalived.conf
root@haproxy101:~#
root@haproxy101:~# vim /etc/keepalived/keepalived.conf
root@haproxy101:~#
root@haproxy101:~# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
acassen
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
interface ens33
virtual_router_id 50
nopreempt
priority 100
advert_int 1
virtual_ipaddress {
192.168.7.253 dev ens33 label ens33:0
}
}
root@haproxy101:~#
2>.启动keepalived服务并设置开机自启动
root@haproxy101:~# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.7.101 netmask 255.255.248.0 broadcast 192.168.7.255
inet6 fe80::20c:29ff:fe96:713b prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:96:71:3b txqueuelen 1000 (Ethernet)
RX packets 13220 bytes 16776100 (16.7 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 3920 bytes 386861 (386.8 KB)
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 1000 (Local Loopback)
RX packets 176 bytes 15256 (15.2 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 176 bytes 15256 (15.2 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
root@haproxy101:~#
root@haproxy101:~# systemctl start keepalived
root@haproxy101:~#
root@haproxy101:~# systemctl enable keepalived
Synchronizing state of keepalived.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable keepalived
root@haproxy101:~#
root@haproxy101:~# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.7.101 netmask 255.255.248.0 broadcast 192.168.7.255
inet6 fe80::20c:29ff:fe96:713b prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:96:71:3b txqueuelen 1000 (Ethernet)
RX packets 13306 bytes 16783333 (16.7 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 4016 bytes 401026 (401.0 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens33:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.7.253 netmask 255.255.255.255 broadcast 0.0.0.0
ether 00:0c:29:96:71:3b 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 184 bytes 16032 (16.0 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 184 bytes 16032 (16.0 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
root@haproxy101:~#
3>.将"haproxy101.yinzhengjie.org.cn"节点的keepalived的配置文件拷贝到"haproxy201.yinzhengjie.org.cn"节点上。
root@haproxy101:~# uname -a
Linux haproxy101.yinzhengjie.org.cn 5.0.0-13-generic #14-Ubuntu SMP Mon Apr 15 14:59:14 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
root@haproxy101:~#
root@haproxy101:~# scp /etc/keepalived/keepalived.conf root@192.168.7.201:/etc/keepalived/keepalived.conf
The authenticity of host '192.168.7.201 (192.168.7.201)' can't be established.
ECDSA key fingerprint is SHA256:8KwMmYtM6BGEuhMIy8q7zK9WyARxjqRa7NDuQba8ZH8.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.7.201' (ECDSA) to the list of known hosts.
root@192.168.7.201's password:
keepalived.conf 100% 424 188.4KB/s 00:00
root@haproxy101:~#
4>.修改"node201.yinzhengjie.org.cn"节点的优先级即可。
root@haproxy201:~# ll /etc/keepalived/
total 12
drwxr-xr-x 2 root root 4096 Jan 11 22:07 ./
drwxr-xr-x 89 root root 4096 Jan 11 21:41 ../
-rw-r--r-- 1 root root 424 Jan 11 22:07 keepalived.conf
root@haproxy201:~#
root@haproxy201:~# vim /etc/keepalived/keepalived.conf
root@haproxy201:~#
root@haproxy201:~# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
acassen
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
interface ens33
virtual_router_id 50
nopreempt
priority 50
advert_int 1
virtual_ipaddress {
192.168.7.253 dev ens33 label ens33:0
}
}
root@haproxy201:~#
5>.在"node201.yinzhengjie.org.cn"节点启动keepalived服务并设置为开启启动
root@haproxy201:~# systemctl start keepalived
root@haproxy201:~#
root@haproxy201:~# systemctl enable keepalived
Synchronizing state of keepalived.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable keepalived
root@haproxy201:~#
root@haproxy201:~# ps -ef | grep keepalived
root 1358 1 0 22:11 ? 00:00:00 /usr/sbin/keepalived
root 1359 1358 0 22:11 ? 00:00:00 /usr/sbin/keepalived
root 1360 1358 0 22:11 ? 00:00:00 /usr/sbin/keepalived
root 1454 1062 0 22:12 pts/0 00:00:00 grep --color=auto keepalived
root@haproxy201:~#
root@haproxy201:~#
root@haproxy201:~# systemctl status keepalived
● keepalived.service - Keepalive Daemon (LVS and VRRP)
Loaded: loaded (/lib/systemd/system/keepalived.service; enabled; vendor preset: enabled)
Active: active (running) since Sat 2020-01-11 22:11:43 CST; 1min 22s ago
Main PID: 1358 (keepalived)
Tasks: 3 (limit: 4619)
Memory: 5.8M
CGroup: /system.slice/keepalived.service
├─1358 /usr/sbin/keepalived
├─1359 /usr/sbin/keepalived
└─1360 /usr/sbin/keepalived
Jan 11 22:11:43 haproxy201.yinzhengjie.org.cn Keepalived[1358]: Starting Healthcheck child process, pid=1359
Jan 11 22:11:43 haproxy201.yinzhengjie.org.cn Keepalived_healthcheckers[1359]: Opening file '/etc/keepalived/keepalived.conf'.
Jan 11 22:11:43 haproxy201.yinzhengjie.org.cn Keepalived[1358]: Starting VRRP child process, pid=1360
Jan 11 22:11:43 haproxy201.yinzhengjie.org.cn Keepalived_vrrp[1360]: Registering Kernel netlink reflector
Jan 11 22:11:43 haproxy201.yinzhengjie.org.cn Keepalived_vrrp[1360]: Registering Kernel netlink command channel
Jan 11 22:11:43 haproxy201.yinzhengjie.org.cn Keepalived_vrrp[1360]: Registering gratuitous ARP shared channel
Jan 11 22:11:43 haproxy201.yinzhengjie.org.cn Keepalived_vrrp[1360]: Opening file '/etc/keepalived/keepalived.conf'.
Jan 11 22:11:43 haproxy201.yinzhengjie.org.cn systemd[1]: Started Keepalive Daemon (LVS and VRRP).
Jan 11 22:11:43 haproxy201.yinzhengjie.org.cn Keepalived_vrrp[1360]: Using LinkWatch kernel netlink reflector...
Jan 11 22:11:43 haproxy201.yinzhengjie.org.cn Keepalived_vrrp[1360]: VRRP_Instance(VI_1) Entering BACKUP STATE
root@haproxy201:~#
root@haproxy201:~#
6>.停止"node101.yinzhengjie.org.cn"节点的keepalived服务**
root@haproxy101:~# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.7.101 netmask 255.255.248.0 broadcast 192.168.7.255
inet6 fe80::20c:29ff:fe96:713b prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:96:71:3b txqueuelen 1000 (Ethernet)
RX packets 14007 bytes 16851015 (16.8 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 5465 bytes 524770 (524.7 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens33:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.7.253 netmask 255.255.255.255 broadcast 0.0.0.0
ether 00:0c:29:96:71:3b 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 184 bytes 16032 (16.0 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 184 bytes 16032 (16.0 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
root@haproxy101:~#
root@haproxy101:~# systemctl stop keepalived
root@haproxy101:~#
root@haproxy101:~# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.7.101 netmask 255.255.248.0 broadcast 192.168.7.255
inet6 fe80::20c:29ff:fe96:713b prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:96:71:3b txqueuelen 1000 (Ethernet)
RX packets 14059 bytes 16855377 (16.8 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 5510 bytes 530628 (530.6 KB)
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 1000 (Local Loopback)
RX packets 184 bytes 16032 (16.0 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 184 bytes 16032 (16.0 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
root@haproxy101:~#
7>.查看"node201.yinzhengjie.org.cn"节点是否接管了VIP**
root@haproxy201:~# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.7.201 netmask 255.255.248.0 broadcast 192.168.7.255
inet6 fe80::20c:29ff:fea6:ed5a prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:a6:ed:5a txqueuelen 1000 (Ethernet)
RX packets 1454 bytes 122754 (122.7 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 878 bytes 148988 (148.9 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens33:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.7.253 netmask 255.255.255.255 broadcast 0.0.0.0
ether 00:0c:29:a6:ed:5a 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 12 bytes 1180 (1.1 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 12 bytes 1180 (1.1 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
root@haproxy201:~#
三.配置haproxy服务
1>.编辑haproxy的配置文件
root@haproxy101:~# cat /etc/haproxy/haproxy.cfg
global
maxconn 100000
user haproxy
group haproxy
daemon
nbproc 2
cpu-map 1 0
cpu-map 2 1
nbthread 2
log 127.0.0.1 local5 info
defaults
option http-keep-alive
option forwardfor
option redispatch
option abortonclose
maxconn 100000
mode http
timeout connect 300000ms
timeout client 300000ms
timeout server 300000ms
listen status_page
bind 192.168.7.253:8888
stats enable
stats uri /haproxy-status
stats auth admin:yinzhengjie
stats realm "Welcome to the haproxy load balancer status page of YinZhengjie"
listen WEB_PORT_80
bind 192.168.7.253:80
server web01 www.cnblogs.com:80/yinzhengjie/ check inter 3000 fall 3 rise 5
root@haproxy101:~#
root@haproxy101:~# scp /etc/haproxy/haproxy.cfg root@192.168.7.201:/etc/haproxy/haproxy.cfg
root@192.168.7.201's password:
haproxy.cfg 100% 818 804.7KB/s 00:00
root@haproxy101:~#
2>.启动haproxy服务器
root@haproxy101:~#
root@haproxy101:~# ss -ntl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 127.0.0.53%lo:53 0.0.0.0:*
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
LISTEN 0 128 [::]:22 [::]:*
root@haproxy101:~#
root@haproxy101:~# systemctl restart haproxy
root@haproxy101:~#
root@haproxy101:~# ss -ntl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 20480 192.168.7.253:80 0.0.0.0:*
LISTEN 0 128 127.0.0.53%lo:53 0.0.0.0:*
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
LISTEN 0 20480 192.168.7.253:8888 0.0.0.0:*
LISTEN 0 128 [::]:22 [::]:*
root@haproxy101:~#
3>.
4>.
5>.
