• 编译安装lua-5.4.2

root@ubuntu:~#  tar xvf lua-5.4.2.tar.gz -C /usr/local/src
root@ubuntu:~#  cd /usr/local/src/lua-5.4.2/
root@ubuntu:/usr/local/src/lua-5.4.2# 
root@ubuntu:/usr/local/src/lua-5.4.2# make linux test
root@ubuntu:/usr/local/src/lua-5.4.2# cd src/
root@ubuntu:/usr/local/src/lua-5.4.2/src# ./lua -v
Lua 5.4.2  Copyright (C) 1994-2020 Lua.org, PUC-Rio
root@ubuntu:/usr/local/src/lua-5.4.2/src# 

• 编译安装haproxy报错，缺少某个systemd的库

root@ubuntu:~# tar xvf haproxy-2.2.6.tar.gz -C /usr/local/src/
root@ubuntu:~# cd /usr/local/src/haproxy-2.2.6/
root@ubuntu:/usr/local/src/haproxy-2.2.6# 
root@ubuntu:/usr/local/src/haproxy-2.2.6# make ARCH=x86_64 TARGET=linux-glibc USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1 USE_SYSTEMD=1 USE_CPU_AFFINITY=1 USE_LUA=1 LUA_INC=/usr/local/src/lua-5.4.2/src/ LUA_LIB=/usr/local/src/lua-5.4.2/src/ PREFIX=/apps/haproxy 
  
  CC      src/haproxy.o
src/haproxy.c:78:10: fatal error: systemd/sd-daemon.h: No such file or directory
 #include <systemd/sd-daemon.h>
          ^~~~~~~~~~~~~~~~~~~~~
compilation terminated.
Makefile:880: recipe for target 'src/haproxy.o' failed
make: *** [src/haproxy.o] Error 1

• 根据报错，apt模糊搜索依赖包

root@ubuntu:/usr/local/src/haproxy-2.2.6# apt search systemd-dev
Sorting... Done
Full Text Search... Done
golang-blitiri-go-systemd-dev/bionic,bionic 0.0+git20170821.0.aec3508-1 all
  Utilities to interact with systemd sockets in Go

golang-github-coreos-go-systemd-dev/bionic,bionic 14-1 all
  Go client bindings for systemd socket activation, journal and D-Bus

libsystemd-dev/bionic-updates 237-3ubuntu10.43 amd64
  systemd utility library - development files

lua-systemd-dev/bionic 0~git20160517-1 amd64
  Development files for lua-systemd library

• 安装依赖包libsystemd-dev

root@ubuntu:/usr/local/src/haproxy-2.2.6# apt install libsystemd-dev

• 再次编译安装haproxy，没有再报错

root@ubuntu:/usr/local/src/haproxy-2.2.6# make ARCH=x86_64 TARGET=linux-glibc USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1 USE_SYSTEMD=1 USE_CPU_AFFINITY=1 USE_LUA=1 LUA_INC=/usr/local/src/lua-5.4.2/src/ LUA_LIB=/usr/local/src/lua-5.4.2/src/ PREFIX=/apps/haproxy 
  
root@ubuntu:/usr/local/src/haproxy-2.2.6# make install PREFIX=/apps/haproxy

• 复制haproxy到/usr/sbin/

root@ubuntu:/usr/local/src/haproxy-2.2.6# cp haproxy /usr/sbin/

• 查看haproxy版本

root@ubuntu:/usr/local/src/haproxy-2.2.6# haproxy -v
HA-Proxy version 2.2.6-3709bd4 2020/11/30 - https://haproxy.org/
Status: long-term supported branch - will stop receiving fixes around Q2 2025.
Known bugs: http://www.haproxy.org/bugs/bugs-2.2.6.html
Running on: Linux 4.15.0-55-generic #60-Ubuntu SMP Tue Jul 2 18:22:20 UTC 2019 x86_64

• 创建systemd开机自启动管理haproxy.service文件

root@ubuntu:~# cat /lib/systemd/system/haproxy.service
[Unit]
Description=HAProxy Load Balancer
After=syslog.target network.target

[Service]
ExecStartPre=/usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg -c -q
ExecStart=/usr/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -p /var/lib/haproxy/haproxy.pid
ExecReload=/bin/kill -USR2 $MAINPID

[Install]
WantedBy=multi-user.target

• 创建haproxy配置文件haproxy.cfg

root@ubuntu:~# cat /etc/haproxy/haproxy.cfg
global
maxconn 100000
chroot /var/lib/haproxy
stats socket /var/lib/haproxy/haproxy.sock1 mode 600 level admin process 1
stats socket /var/lib/haproxy/haproxy.sock2 mode 600 level admin process 2
user haproxy
group haproxy
daemon
nbproc 2
cpu-map 1 0
cpu-map 2 1

pidfile /var/lib/haproxy/haproxy.pid

defaults
option http-keep-alive
option forwardfor
maxconn 100000
mode http
timeout connect 120s
timeout client 120s
timeout server 120s

listen stats
  mode http
  bind :9999
  stats enable
  log global
  stats uri /haproxy-status
  stats auth haadmin:123456

listen web
  bind :80
  mode http
  log global
  server web1 127.0.0.1:8080 check inter 3 fall 2 rise 5
  server web2 127.0.0.1:9090 check inter 3 fall 2 rise 5

• 创建启动用户和pid、socket的存放目录

root@ubuntu:~# useradd -r -s /sbin/nologin haproxy
root@ubuntu:~# mkdir /var/lib/haproxy
root@ubuntu:~# chown -R haproxy.haproxy /var/lib/haproxy
root@ubuntu:~# 

• 启动haproxy

root@ubuntu:~# systemctl enable --now haproxy
root@ubuntu:~# ps aux |grep haproxy
root      30251  0.2  0.5 150996 22728 ?        Ss   23:37   0:00 /usr/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -p /var/lib/haproxy/haproxy.pid
haproxy   30253  0.8  0.3 150996 15816 ?        S    23:37   0:00 /usr/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -p /var/lib/haproxy/haproxy.pid
haproxy   30254  0.8  0.3 150996 15768 ?        S    23:37   0:00 /usr/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -p /var/lib/haproxy/haproxy.pid
root      30256  0.0  0.0  13144  1016 pts/0    S+   23:37   0:00 grep --color=auto haproxy
root@ubuntu:~#