部署 HAProxy 服务

1 准备工作

1.1 环境信息

• HAProxy 服务器信息如下:

192.168.100.100

1.2 安装依赖

yum -y install epel-release

2 安装配置 HAProxy

2.1 安装 HAProxy

yum install -y haproxy

2.2 配置 HAProxy

# 打开 HAProxy 的配置文件
vi /etc/haproxy/haproxy.cfg

global
    # to have these messages end up in /var/log/haproxy.log you will
    # need to:
    #
    # 1) configure syslog to accept network log events.  This is done
    #    by adding the '-r' option to the SYSLOGD_OPTIONS in
    #    /etc/sysconfig/syslog
    #
    # 2) configure local2 events to go to the /var/log/haproxy.log
    #   file. A line like the following can be added to
    #   /etc/sysconfig/syslog
    #
    #    local2.*                       /var/log/haproxy.log
    #
    log         127.0.0.1 local2
    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     4000
    user        haproxy
    group       haproxy
    daemon
    # turn on stats unix socket
    stats socket /var/lib/haproxy/stats
#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
    log                     global
    option                  dontlognull
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 3000
listen stats
    bind *:8080
    mode http
    stats enable
    stats uri /haproxy                      # 监控页面, 请自行修改. 访问地址为 http://192.168.100.100:8080/haproxy
    stats refresh 5s
    stats realm haproxy-status
    stats auth admin:KXOeyNgDeTdpeu9q       # 账户密码, 请自行修改. 访问 http://192.168.100.100:8080/haproxy 会要求输入
#---------------------------------------------------------------------
# check  检活参数说明
# inter  间隔时间, 单位: 毫秒
# rise   连续成功的次数, 单位: 次
# fall   连续失败的次数, 单位: 次
# 例: inter 2s rise 2 fall 3
# 表示 2 秒检查一次状态, 连续成功 2 次服务正常, 连续失败 3 次服务异常
#
# server 服务参数说明
# server 192.168.100.21 192.168.100.21:80 weight 1 cookie web01
# 第一个 192.168.100.21 做为页面展示的标识, 可以修改为其他任意字符串
# 第二个 192.168.100.21:80 是实际的后端服务端口
# weight 为权重, 多节点时安装权重进行负载均衡
# cookie 用户侧的 cookie 会包含此标识, 便于区分当前访问的后端节点
# 例: server db01 192.168.100.21:3306 weight 1 cookie db_01
#---------------------------------------------------------------------
listen jms-web
    bind *:80                               # 监听 80 端口
    mode http
    # redirect scheme https if !{ ssl_fc }  # 重定向到 https
    # bind *:443 ssl crt /opt/ssl.pem       # https 设置
    option httpclose
    option forwardfor
    option httpchk GET /api/health/         # Core 检活接口
    cookie SERVERID insert indirect
    hash-type consistent
    fullconn 500
    balance leastconn
    server 192.168.100.21 192.168.100.21:80 weight 1 cookie web01 check inter 2s rise 2 fall 3  # JumpServer 服务器
    server 192.168.100.22 192.168.100.22:80 weight 1 cookie web02 check inter 2s rise 2 fall 3
    server 192.168.100.23 192.168.100.23:80 weight 1 cookie web03 check inter 2s rise 2 fall 3
    server 192.168.100.24 192.168.100.24:80 weight 1 cookie web03 check inter 2s rise 2 fall 3
listen jms-ssh
    bind *:2222
    mode tcp
    option tcp-check
    fullconn 500
    balance source
    server 192.168.100.21 192.168.100.21:2222 weight 1 check inter 2s rise 2 fall 3 send-proxy
    server 192.168.100.22 192.168.100.22:2222 weight 1 check inter 2s rise 2 fall 3 send-proxy
    server 192.168.100.23 192.168.100.23:2222 weight 1 check inter 2s rise 2 fall 3 send-proxy
    server 192.168.100.24 192.168.100.24:2222 weight 1 check inter 2s rise 2 fall 3 send-proxy
listen jms-koko
    mode http
    option httpclose
    option forwardfor
    option httpchk GET /koko/health/ HTTP/1.1\r\nHost:\ 192.168.100.100  # KoKo 检活接口, host 填写 HAProxy 的 ip 地址
    cookie SERVERID insert indirect
    hash-type consistent
    fullconn 500
    balance leastconn
    server 192.168.100.21 192.168.100.21:80 weight 1 cookie web01 check inter 2s rise 2 fall 3
    server 192.168.100.22 192.168.100.22:80 weight 1 cookie web02 check inter 2s rise 2 fall 3
    server 192.168.100.23 192.168.100.23:80 weight 1 cookie web03 check inter 2s rise 2 fall 3
    server 192.168.100.24 192.168.100.24:80 weight 1 cookie web03 check inter 2s rise 2 fall 3
listen jms-lion
    mode http
    option httpclose
    option forwardfor
    option httpchk GET /lion/health/ HTTP/1.1\r\nHost:\ 192.168.100.100  # Lion 检活接口, host 填写 HAProxy 的 ip 地址
    cookie SERVERID insert indirect
    hash-type consistent
    fullconn 500
    balance leastconn
    server 192.168.100.21 192.168.100.21:80 weight 1 cookie web01 check inter 2s rise 2 fall 3
    server 192.168.100.22 192.168.100.22:80 weight 1 cookie web02 check inter 2s rise 2 fall 3
    server 192.168.100.23 192.168.100.23:80 weight 1 cookie web03 check inter 2s rise 2 fall 3
    server 192.168.100.24 192.168.100.24:80 weight 1 cookie web03 check inter 2s rise 2 fall 3
listen jms-magnus
    bind *:30000
    mode tcp
    option tcp-check
    fullconn 500
    balance source
    server 192.168.100.21 192.168.100.21:30000 weight 1 check inter 2s rise 2 fall 3 send-proxy
    server 192.168.100.22 192.168.100.22:30000 weight 1 check inter 2s rise 2 fall 3 send-proxy
    server 192.168.100.23 192.168.100.23:30000 weight 1 check inter 2s rise 2 fall 3 send-proxy
    server 192.168.100.24 192.168.100.24:30000 weight 1 check inter 2s rise 2 fall 3 send-proxy

2.3 配置 SELinux

setsebool -P haproxy_connect_any 1

2.4 启动 HAProxy

systemctl enable haproxy
systemctl start haproxy

3 配置防火墙

firewall-cmd --permanent --zone=public --add-port=80/tcp
firewall-cmd --permanent --zone=public --add-port=443/tcp
firewall-cmd --permanent --zone=public --add-port=2222/tcp
firewall-cmd --permanent --zone=public --add-port=33060/tcp
firewall-cmd --permanent --zone=public --add-port=33061/tcp
firewall-cmd --reload