Introduction ​

Overview ​

HAProxy is a free and open-source software program written in C. It provides a high availability load balancer and proxy server for TCP and HTTP-based applications, supports virtual hosts, and has a reputation for being fast and reliable. Programming language: C

Brief description: web load balancer

Recommended Software Version ​

HAProxy 1.9.0

Notes:

This document applies to HAProxy 1.9.0. However, you can refer to this document when porting other HAProxy versions.

Environment Requirements ​

Hardware ​

OS ​

Check the current system information.

cat /etc/os-release

For details about how to install the openEuler OS, see https://docs.openeuler.org/en/docs/20.03_LTS_SP1/docs/Installation/Installation.html.
Notes: You are advised to select the "Server with GUI" installation mode.

Installing HAProxy Using the RPM Package Obtained from a Mirror Site ​

If your server can access the network, run the "wget https://mirrors.huaweicloud.com/kunpeng/yum/el/7/aarch64/Packages/web/haproxy-1.9.0-1.el7.aarch64.rpm" command to download the RPM package. Otherwise, visit https://mirrors.huaweicloud.com/kunpeng/yum/el/7/aarch64/Packages/web/haproxy-1.9.0-1.el7.aarch64.rpm to download the package and copy it to the /home directory on the server.

Notes: The RPM packages in the mirror site are compiled and packaged using open-source code, and then uploaded to the mirror site.

The following describes how to download the RPM package to the local PC and then upload it to the server.

1. Install HAProxy.

   bash

   rpm -ivh haproxy-1.9.0-1.el7.aarch64.rpm

   

2. View the installation directory.

   bash

   ls /usr/local/haproxy

   

Operation and Verification ​

• Configure parameters.

  a. Open the option-http_proxy.cfg file.

  bash

  vi  /usr/local/haproxy/conf/option-http_proxy.cfg

  b. Modify the file as follows, and save and close the file:

  bash

  global
  maxconn      20000
  log               127.0.0.1 local0  info
  uid               0
  gid               0
  chroot          /usr/local/haproxy
  nbproc          4
  daemon
  defaults
  mode                       http
  retries                      3
  timeout connect      10s
  timeout client          20s
  timeout server         30s
  timeout check          2s
  frontend test-proxy
  bind            *:80
  mode            http
  log             global
  default_backend test-proxy-srv
  backend test-proxy-srv
  balance        roundrobin
  option http-server-close
  option httpchk   GET /index.html
  http-check expect       status 200
  server          web1    IP1:PORT1 weight 3
  server          web2    IP2:PORT2 weight 3

  For details about the parameters in the configuration file, see the following table.

• Start HAProxy.

  bash

  taskset -c 0-3 /usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/conf/option-http_proxy.cfg

• Verify HAProxy.

  bash

  ps -ef | grep haproxy

  The HAProxy process is displayed.

  Open the browser, enter http://HAProxy IP address:80 in the address box, and press Enter. The WebUI page of the backend server is displayed, indicating that HAProxy is running properly. Refresh the page. The page switches between backend servers.

  Notes:

  • (Optional) Stop HAProxy. Do not run this command when services are running.

    bash

    pkill haproxy

  • (Optional) Uninstall HAProxy and query the result.

    bash

    rpm -qa | grep haproxy

    bash

    rpm -e --nodeps haproxy-1.9.0

    bash

    rpm -qa | grep haproxy

    bash

    rm -rf /usr/local/haproxy