HAProxy 3.3

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TCP 代理与协议转换 ​

HAProxy 支持纯 TCP 层的负载均衡和协议转换。

TCP 代理基础配置 ​

haproxy
global
    maxconn 8192

defaults
    mode tcp
    option tcplog
    timeout connect 10s
    timeout client 300s
    timeout server 300s

frontend tcp_front
    bind *:3306 name mysql
    bind *:5432 name postgres
    bind *:6379 name redis

    use_backend mysql_cluster if { dst_port 3306 }
    use_backend postgres_cluster if { dst_port 5432 }
    use_backend redis_cluster if { dst_port 6379 }

backend mysql_cluster
    mode tcp
    balance roundrobin
    option mysql-check user haproxy_check
    server mysql1 10.0.0.11:3306 maxconn 100 check

TLS Pass-through ​

haproxy
frontend tls_passthrough
    bind *:443
    mode tcp

    acl is_app1 req.ssl_sni -m end app1.example.com
    use_backend app1_backend if is_app1

backend app1_backend
    mode tcp
    server app1 10.0.4.11:443 check

TCP 健康检查 ​

haproxy
    option tcp-check
    tcp-check connect port 22
    tcp-check send "PING\r\n"
    tcp-check expect string "PONG"