Using the following Spec on RHEL 8, may be it's a good start.

[Uniswap012]

Using the following Spec on RHEL 8, may be it's a good start.

%define haproxy_user    haproxy
%define haproxy_group   %{haproxy_user}
%define haproxy_homedir %{_localstatedir}/lib/haproxy
%define haproxy_confdir %{_sysconfdir}/haproxy
%define haproxy_datadir %{_datadir}/haproxy

%global _hardened_build 1

Name:           haproxy24
Version:        2.4.1
Release:        1%{?dist}
Summary:        HAProxy reverse proxy for high availability environments

License:        GPLv2+

URL:            http://www.haproxy.org/
Source0:        %{url}/download/2.4/src/haproxy-%{version}.tar.gz
Source1:        haproxy.service
Source2:        haproxy.cfg
Source3:        haproxy.logrotate
Source4:        haproxy.sysconfig
Source5:        halog.1

BuildRequires:  gcc
BuildRequires:  lua-devel
BuildRequires:  pcre2-devel
BuildRequires:  zlib-devel
BuildRequires:  openssl-devel
BuildRequires:  systemd-devel
BuildRequires:  systemd

Requires(pre):  shadow-utils
%{?systemd_requires}

Provides:       haproxy = %{version}-%{release}
Provides:       haproxy%{?_isa} = %{version}-%{release}
Conflicts:      haproxy < %{version}-%{release}

%description
HAProxy is a TCP/HTTP reverse proxy which is particularly suited for high
availability environments. Indeed, it can:
 - route HTTP requests depending on statically assigned cookies
 - spread load among several servers while assuring server persistence
   through the use of HTTP cookies
 - switch to backup servers in the event a main one fails
 - accept connections to special ports dedicated to service monitoring
 - stop accepting connections without breaking existing ones
 - add, modify, and delete HTTP headers in both directions
 - block requests matching particular patterns
 - report detailed status to authenticated users from a URI
   intercepted from the application

%prep
%setup -q -n haproxy-%{version}

%build
regparm_opts=
%ifarch %ix86 x86_64
regparm_opts="USE_REGPARM=1"
%endif

%{__make} %{?_smp_mflags} \
    CPU="generic" \
    TARGET="linux-glibc" \
    USE_LUA=1 \
    USE_SLZ=1 \
    USE_PCRE2=1 \
    USE_PROMEX=1 \
    USE_CRYPT_H=1 \
    USE_OPENSSL=1 \
    USE_SYSTEMD=1 \
    USE_GETADDRINFO=1 \
    USE_LINUX_TPROXY=1 \
    ${regparm_opts} \
    ADDINC="%{optflags}" \
    ADDLIB="%{__global_ldflags}"

%{__make} admin/halog/halog OPTIMIZE="%{optflags} %{build_ldflags}"

pushd admin/iprange
%{__make} all OPTIMIZE="%{optflags} %{build_ldflags}"
popd

%install
%{__make} install-bin DESTDIR=%{buildroot} PREFIX=%{_prefix} TARGET="linux2628"
%{__make} install-man DESTDIR=%{buildroot} PREFIX=%{_prefix}

%{__install} -p -D -m 0644 %{SOURCE1} %{buildroot}%{_unitdir}/haproxy.service
%{__install} -p -D -m 0644 %{SOURCE2} %{buildroot}%{haproxy_confdir}/haproxy.cfg
%{__install} -p -D -m 0644 %{SOURCE3} %{buildroot}%{_sysconfdir}/logrotate.d/haproxy
%{__install} -p -D -m 0644 %{SOURCE4} %{buildroot}%{_sysconfdir}/sysconfig/haproxy
%{__install} -p -D -m 0644 %{SOURCE5} %{buildroot}%{_mandir}/man1/halog.1
%{__install} -d -m 0755 %{buildroot}%{haproxy_homedir}
%{__install} -d -m 0755 %{buildroot}%{haproxy_datadir}
%{__install} -d -m 0755 %{buildroot}%{_bindir}
%{__install} -p -m 0755 ./admin/halog/halog %{buildroot}%{_bindir}/halog
%{__install} -p -m 0755 ./admin/iprange/iprange %{buildroot}%{_bindir}/iprange
%{__install} -p -m 0755 ./admin/iprange/ip6range %{buildroot}%{_bindir}/ip6range
%{__install} -p -m 0644 ./examples/errorfiles/* %{buildroot}%{haproxy_datadir}

for httpfile in $(find ./examples/errorfiles/ -type f)
do
    %{__install} -p -m 0644 $httpfile %{buildroot}%{haproxy_datadir}
done

%{__rm} -rf ./examples/errorfiles/

find ./examples/* -type f ! -name "*.cfg" -exec %{__rm} -f "{}" \;

for textfile in $(find ./ -type f -name '*.txt')
do
    %{__mv} $textfile $textfile.old
    iconv --from-code ISO8859-1 --to-code UTF-8 --output $textfile $textfile.old
    %{__rm} -f $textfile.old
done

%pre
getent group %{haproxy_group} >/dev/null || \
    groupadd -r %{haproxy_group}
getent passwd %{haproxy_user} >/dev/null || \
    useradd -r -g %{haproxy_user} -d %{haproxy_homedir} \
    -s /sbin/nologin -c "haproxy" %{haproxy_user}
exit 0

%post
%systemd_post haproxy.service

%preun
%systemd_preun haproxy.service

%postun
%systemd_postun_with_restart haproxy.service

%files
%doc doc/* examples/*
%doc CHANGELOG README ROADMAP VERSION
%license LICENSE
%dir %{haproxy_homedir}
%dir %{haproxy_confdir}
%dir %{haproxy_datadir}
%{haproxy_datadir}/*
%config(noreplace) %{haproxy_confdir}/haproxy.cfg
%config(noreplace) %{_sysconfdir}/logrotate.d/haproxy
%config(noreplace) %{_sysconfdir}/sysconfig/haproxy
%{_unitdir}/haproxy.service
%{_sbindir}/haproxy
%{_bindir}/halog
%{_bindir}/iprange
%{_bindir}/ip6range
%{_mandir}/man1/*

%changelog
* Wed Jun 23 2021 Christian Boenning <christian@boenning.io> - 2.4.1-1
- HAProxy 2.4.1

Originally posted by @hexa2k9 in iusrepo/wishlist#303 (comment)

[carlwgeorge]

This repo is for the website source code, not packaging.