HAProxy. Подключение TLS сертификатов LetsEncrypt с помощью ACME

SINGLE DOMAIN

Заранее поставим socat

apt install socat

Создаём пользователя

adduser --system --disabled-password --disabled-login --home /var/lib/acme --quiet --force-badname --group acme

Добавляем его группу haproxy

adduser acme haproxy

Создаём папку для acme

mkdir /usr/local/share/acme.sh/

Устанавливаем скрипт

git clone https://github.com/acmesh-official/acme.sh.git
cd acme.sh/
./acme.sh --install --no-cron --no-profile --home /usr/local/share/acme.sh
ln -s /usr/local/share/acme.sh/acme.sh /usr/local/bin/
chmod 755 /usr/local/share/acme.sh/

Создадим аккаунт

sudo -u acme -s
acme.sh --register-account --server letsencrypt -m admin@iwad.ru

Account key creation OK.
Registering account: https://acme-v02.api.letsencrypt.org/directory
Registered
ACCOUNT_THUMBPRINT='ItRz8wdo6Xo5zEmwJlZcVpLckTZHGg6pYSuwaZ-'

Создаём директорию для сертификатов

mkdir /etc/haproxy/ssl
chown haproxy:haproxy /etc/haproxy/ssl
chmod 770 /etc/haproxy/ssl

Правим конфиг haproxy.conf

global
   stats socket /var/run/haproxy/admin.sock level admin mode 660
   setenv ACCOUNT_THUMBPRINT 'ItRz8wdo6Xo5zEmwJlZcVpLckTZHGg6pYSuwaZ-'

frontend web
   bind :443 ssl crt /etc/haproxy/certs/ strict-sni
   http-request return status 200 content-type text/plain lf-string "%[path,field(-1,/)].${ACCOUNT_THUMBPRINT}\n" if { path_beg '/.well-known/acme-challenge/' }

stats socket - активирует API, которое позволяет загрузить сертификат в runtime memory хапрокси
strict-sni - разрешает запустить хапрокси с пустой директорией /etc/haproxy/ssl (когда ещё нет сертификатов)
%[path,field(-1,/)] - использует случайную строку LetsEncrypt, отправленную в рамках запроса HTTP-01

Рестартим хапрокси

service haproxy restart

Генерируем сертификат

sudo -u acme -s
acme.sh --issue -d haproxy.iwad.ru --stateless --server letsencrypt

[Mon Jul 15 11:38:34 PM MSK 2024] Your cert is in: /var/lib/acme/.acme.sh/haproxy.iwad.ru_ecc/haproxy.iwad.ru.cer
[Mon Jul 15 11:38:34 PM MSK 2024] Your cert key is in: /var/lib/acme/.acme.sh/haproxy.iwad.ru_ecc/haproxy.iwad.ru.key
[Mon Jul 15 11:38:34 PM MSK 2024] The intermediate CA cert is in: /var/lib/acme/.acme.sh/haproxy.iwad.ru_ecc/ca.cer
[Mon Jul 15 11:38:34 PM MSK 2024] And the full-chain cert is in: /var/lib/acme/.acme.sh/haproxy.iwad.ru_ecc/fullchain.cer

Деплоим сертификат

sudo -u acme -s
DEPLOY_HAPROXY_HOT_UPDATE=yes \
DEPLOY_HAPROXY_STATS_SOCKET=/var/run/haproxy/admin.sock \
DEPLOY_HAPROXY_PEM_PATH=/etc/haproxy/ssl \
acme.sh --deploy -d haproxy.iwad.ru --deploy-hook haproxy

[Mon Jul 15 11:51:49 PM MSK 2024] The domain 'haproxy.iwad.ru' seems to already have an ECC cert, let's use it.
[Mon Jul 15 11:51:49 PM MSK 2024] Deploying PEM file
[Mon Jul 15 11:51:49 PM MSK 2024] Moving new certificate into place
[Mon Jul 15 11:51:49 PM MSK 2024] Creating new certificate '/etc/haproxy/ssl/haproxy.iwad.ru.pem' over HAProxy stats socket.
[Mon Jul 15 11:51:49 PM MSK 2024] Success

Проверяем серт на хапроксе

echo "show ssl cert /etc/haproxy/ssl/haproxy.iwad.ru.pem" |\
   socat /var/run/haproxy/admin.sock -

Filename: /etc/haproxy/ssl/haproxy.iwad.ru.pem
Status: Used
notBefore: Jul 15 19:38:32 2024 GMT
notAfter: Oct 13 19:38:31 2024 GMT
Subject Alternative Name: DNS:haproxy.iwad.ru
Algorithm: EC256
Subject: /CN=haproxy.iwad.ru
Issuer: /C=US/O=Let's Encrypt/CN=E5
Chain Subject: /C=US/O=Let's Encrypt/CN=E5
Chain Issuer: /C=US/O=Internet Security Research Group/CN=ISRG Root X1

Автопродление сертификата

sudo -u acme -s
acme.sh --install-cronjob

Проверяем что добавилась строчка

21 3 * * * /usr/local/share/acme.sh/acme.sh --cron --home "/var/lib/acme/.acme.sh" > /dev/null

WILDCARD

Для получения wildcard нужно подтверждение владения зоной. Сделаем на примере Cloudflare. Предварительно надо собрать нужные данные из профиля.

Получаем сертификат

sudo -u acme -s
export CF_Token=""
export CF_Zone_ID=""
export CF_Account_ID=""
acme.sh --issue -d *.iwad.ru --server letsencrypt --dns dns_cf

[Tue Jul 16 12:13:06 AM MSK 2024] Your cert is in: /var/lib/acme/.acme.sh/*.iwad.ru_ecc/*.iwad.ru.cer
[Tue Jul 16 12:13:06 AM MSK 2024] Your cert key is in: /var/lib/acme/.acme.sh/*.iwad.ru_ecc/*.iwad.ru.key
[Tue Jul 16 12:13:06 AM MSK 2024] The intermediate CA cert is in: /var/lib/acme/.acme.sh/*.iwad.ru_ecc/ca.cer
[Tue Jul 16 12:13:06 AM MSK 2024] And the full-chain cert is in: /var/lib/acme/.acme.sh/*.iwad.ru_ecc/fullchain.cer

Деплоим серт на хапрокси

sudo -u acme -s
DEPLOY_HAPROXY_HOT_UPDATE=yes \
DEPLOY_HAPROXY_STATS_SOCKET=/var/run/haproxy/admin.sock \
DEPLOY_HAPROXY_PEM_PATH=/etc/haproxy/ssl \
acme.sh --deploy -d *.iwad.ru --deploy-hook haproxy

[Tue Jul 16 12:14:23 AM MSK 2024] The domain '*.iwad.ru' seems to already have an ECC cert, let's use it.
[Tue Jul 16 12:14:23 AM MSK 2024] Deploying PEM file
[Tue Jul 16 12:14:23 AM MSK 2024] Moving new certificate into place
[Tue Jul 16 12:14:23 AM MSK 2024] Creating new certificate '/etc/haproxy/ssl/_.iwad.ru.pem' over HAProxy stats socket.
[Tue Jul 16 12:14:24 AM MSK 2024] Success

Проверяем на хапроксе

echo "show ssl cert /etc/haproxy/ssl/_.iwad.ru.pem" | socat /var/run/haproxy/admin.sock -

Filename: /etc/haproxy/ssl/_.iwad.ru.pem
Status: Used
notBefore: Jul 15 20:13:04 2024 GMT
notAfter: Oct 13 20:13:03 2024 GMT
Subject Alternative Name: DNS:*.iwad.ru
Algorithm: EC256
Subject: /CN=*.iwad.ru
Issuer: /C=US/O=Let's Encrypt/CN=E5
Chain Subject: /C=US/O=Let's Encrypt/CN=E5
Chain Issuer: /C=US/O=Internet Security Research Group/CN=ISRG Root X1
OCSP Response Key: 

https://www.haproxy.com/blog/haproxy-and-let-s-encrypt https://github.com/acmesh-official/acme.sh/wiki/dnsapi#dns_cf https://www.keyvanfatehi.com/2021/09/11/using-acme-sh-in-cloudflare-dns-mode-to-easily-maintain-wildcard-ssl-certificate-for-apache-server-on-ubuntu-20-04/