#更新软件包
sudo apt-get update
 
#查找haproxy
sudo apt list|grep haproxy
 
#安装haproxy
sudo apt-get install haproxy

#查看服务状态
sudo systemctl status haproxy
 
#查看版本
haproxy -v
 
#如果要设置HAProxy服务开机自启，可以使用：
sudo systemctl enable haproxy

root@hcss-ecs-2618:~# sudo systemctl status haproxy
● haproxy.service - HAProxy Load Balancer
   Loaded: loaded (/lib/systemd/system/haproxy.service; enabled; vendor
preset: enabled)
   Active: active (running) since Wed 2024-05-15 16:57:34 CST; 10min ago
     Docs: man:haproxy(1)
           file:/usr/share/doc/haproxy/configuration.txt.gz
  Process: 45478 ExecStartPre=/usr/sbin/haproxy -Ws -f $CONFIG -c -q
$EXTRAOPTS (code=exited, status=0/SUCCESS)
 Main PID: 45480 (haproxy)
    Tasks: 3 (limit: 2006)
   Memory: 69.4M
      CPU: 92ms
   CGroup: /system.slice/haproxy.service
           ├─45480 /usr/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -p
/run/haproxy.pid -S /run/haproxy-master.sock
           └─45482 /usr/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -p
/run/haproxy.pid -S /run/haproxy-master.sock
May 15 16:57:34 hcss-ecs-2618 systemd[1]: Starting HAProxy Load Balancer...
May 15 16:57:34 hcss-ecs-2618 haproxy[45480]: [NOTICE] (45480) : New worker
#1 (45482) forked
May 15 16:57:34 hcss-ecs-2618 systemd[1]: Started HAProxy Load Balancer.
 
root@hcss-ecs-2618:~# haproxy -v
HAProxy version 2.4.24-0ubuntu0.22.04.1 2023/10/31 - https://haproxy.org/
Status: long-term supported branch - will stop receiving fixes around Q2 2026.
Known bugs: http://www.haproxy.org/bugs/bugs-2.4.24.html
Running on: Linux 5.15.0-60-generic #66-Ubuntu SMP Fri Jan 20 14:29:49 UTC
2023 x86_64
root@hcss-ecs-2618:~#

vim /etc/haproxy/haproxy.cfg

# haproxy web 管理界面
listen stats
    bind *:8100
    mode http
    stats enable
    stats realm Haproxy\ Statistics
    stats uri /
    stats auth admin:admin
 
# 配置负载均衡
listen rabbitmq
    bind *:5670
    mode tcp
    balance roundrobin
    server rabbitmq1 127.0.0.1:5672 check inter 5000 rise 2 fall 3
    server rabbitmq2 127.0.0.1:5673 check inter 5000 rise 2 fall 3
    server rabbitmq3 127.0.0.1:5674 check inter 5000 rise 2 fall 3

# haproxy web 管理界面
listen stats #设置一个监听器, 统计HAProxy的统计信息
    bind *:8100 #指定了监听器绑定到的IP地址和端口
    mode http #监听器的工作模式为HTTP
    stats enable #启用统计页面
    stats realm Haproxy\ Statistics
    stats uri /
    stats auth admin:admin #haproxy登录账号和密码
 
# 配置负载均衡
listen rabbitmq #设置监听器
    bind *:5670 #监听器绑定到的IP地址和端口, 也就是集群前端IP, 供producer和consumer来进行选择，由于5672端口已经默认使用, 这里选择5670端口
    mode tcp #由于RabbitMQ使用AMQP协议，它是一个基于TCP的协议，所以这里使用TCP模式
    balance roundrobin #指定负载均衡策略为轮询
    #负载均衡中的集群节点配置，这里选择的rabbit节点
    server rabbitmq1 127.0.0.1:5672 check inter 5000 rise 2 fall 3
    server rabbitmq2 127.0.0.1:5673 check inter 5000 rise 2 fall 3
    server rabbitmq3 127.0.0.1:5674 check inter 5000 rise 2 fall 3

global
    log /dev/log local0
    log /dev/log local1 notice
    chroot /var/lib/haproxy
    stats socket /run/haproxy/admin.sock mode 660 level admin expose-fd
listeners
    stats timeout 30s
    user haproxy
    group haproxy
    daemon
 
    # Default SSL material locations
    ca-base /etc/ssl/certs
    crt-base /etc/ssl/private
 
    # See: https://ssl-config.mozilla.org/#server=haproxy&server-
version=2.0.3&config=intermediate
    ssl-default-bind-ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-
AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-
SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-
AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
    ssl-default-bind-ciphersuites
TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
    ssl-default-bind-options ssl-min-ver TLSv1.2 no-tls-tickets
 
defaults
    log global
    mode http
    option httplog
    option dontlognull
    timeout connect 5000
    timeout client 50000
    timeout server 50000
    errorfile 400 /etc/haproxy/errors/400.http
    errorfile 403 /etc/haproxy/errors/403.http
    errorfile 408 /etc/haproxy/errors/408.http
    errorfile 500 /etc/haproxy/errors/500.http
    errorfile 502 /etc/haproxy/errors/502.http
    errorfile 503 /etc/haproxy/errors/503.http
    errorfile 504 /etc/haproxy/errors/504.http
 
# haproxy web 管理界面
listen stats
    bind *:8100
    mode http
    stats enable
    stats realm Haproxy\ Statistics
    stats uri /
    stats auth admin:admin
 
# 配置负载均衡
listen rabbitmq
    bind *:5670
    mode tcp
    balance roundrobin
    server rabbitmq1 127.0.0.1:5672 check inter 5000 rise 2 fall 3
    server rabbitmq2 127.0.0.1:5673 check inter 5000 rise 2 fall 3
    server rabbitmq3 127.0.0.1:5674 check inter 5000 rise 2 fall 3

sudo systemctl restart haproxy