HAProxy_and_Certbot_install.md

Installing HAProxy with Certbot

Largely taken from this tutorial, which was hilariously out of date

Install HA Proxy

sudo apt install haproxy

Install Certbot

sudo apt install python3-certbot python3-certbot-dns-route53

Set AWS Creds

sudo mkdir /root/.aws
sudo vim /root/.aws/config

File Content:

[default]
aws_access_key_id={{KEYHERE}}
aws_secret_access_key={{KEYHERE}}

Register with ACME

sudo certbot certonly --non-interactive --agree-tos -m '<<EMAIL>>' --dns-route53 -d {{HOSTNAMEHERE}}
sudo certbot renew --dry-run

Renew hook script

sudo mkdir -p /etc/haproxy/certs/
sudo vim /etc/letsencrypt/renewal-hooks/deploy/haproxy.sh

File Content:

#!/bin/sh

SITE={{HOSTNAMEHERE}}

# move to the correct let's encrypt directory
cd /etc/letsencrypt/live/$SITE

# cat files to make combined .pem for haproxy
cat fullchain.pem privkey.pem > /etc/haproxy/certs/$SITE.pem

# reload haproxy
service haproxy reload

sudo chmod +x /etc/letsencrypt/renewal-hooks/deploy/haproxy.sh

Config HA Proxy

sudo vim /etc/haproxy/haproxy.cfg

File Content:

global
	log /dev/log	local0
	log /dev/log	local1 notice
	chroot /var/lib/haproxy
	stats socket /run/haproxy/admin.sock mode 660 level admin
	stats timeout 30s
	user haproxy
	group haproxy
	daemon

	maxconn 2048
	
	stats socket :9000 mode 660 level admin

	# Default SSL material locations
	ca-base /etc/ssl/certs
	crt-base /etc/ssl/private

	# See: https://ssl-config.mozilla.org/#server=haproxy&server-version=2.0.3&config=intermediate
        ssl-default-bind-ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
        ssl-default-bind-ciphersuites TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
        ssl-default-bind-options ssl-min-ver TLSv1.2 no-tls-tickets

	tune.ssl.default-dh-param 2048

defaults
	log	global
	mode	http
	option	httplog
	option	dontlognull
        timeout connect 5000
        timeout client  50000
        timeout server  50000
	errorfile 400 /etc/haproxy/errors/400.http
	errorfile 403 /etc/haproxy/errors/403.http
	errorfile 408 /etc/haproxy/errors/408.http
	errorfile 500 /etc/haproxy/errors/500.http
	errorfile 502 /etc/haproxy/errors/502.http
	errorfile 503 /etc/haproxy/errors/503.http
	errorfile 504 /etc/haproxy/errors/504.http

	option forwardfor
	option http-server-close

resolvers localdns
	nameserver dns1 127.0.0.53:53
	accepted_payload_size 8192

frontend stats
    bind :8404
    stats enable
    stats uri /
    stats refresh 5s

frontend www-http
	bind :80
	http-request redirect scheme https code 301

frontend www-https
	bind :443 ssl crt /etc/haproxy/certs/{{HOSTNAMEHERE}}.pem
	http-request set-header X-Forwarded-Proto https
	default_backend backend-hosts

backend backend-hosts
	balance leastconn

	cookie SERVER insert indirect nocache dynamic
	dynamic-cookie-key RANDOMSECRET

	default-server check check-ssl ssl ca-file /etc/ssl/certs/ca-certificates.crt
	server-template web 1-5 _{{SERVICENAME}}._tcp.{{DOMAINNAME}} resolvers localdns init-addr none

Run renew script

(this fixes the HA Proxy certs and restarts HA)

/etc/letsencrypt/renewal-hooks/deploy/haproxy.sh