Haproxy + letsencrypt + docker

haproxy.cfg

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
    
    # Default SSL material locations
    ca-base /etc/ssl/certs
    crt-base /etc/ssl/private
    
    # Default ciphers to use on SSL-enabled listening sockets.
    # For more information, see ciphers(1SSL). This list is from:
    #  https://hynek.me/articles/hardening-your-web-servers-ssl-ciphers/
    ssl-default-bind-ciphers ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AESGCM:RSA+AES:RSA+3DES:!aNULL:!MD5:!DSS
    ssl-default-bind-options no-sslv3

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

frontend http-in
    bind *:80
    # comment this out on first run
    bind *:443 ssl crt /etc/haproxy/ssl-bundle.pem

    default_backend failback
    acl host_example1 hdr_dom(host) -i example1.com
    acl host_example2 hdr_dom(host) -i example2.com
    acl path_letsencrypt path_beg /.well-known/acme-challenge

    use_backend letsencrypt if path_letsencrypt

    http-request set-header X-Forwarded-Port %[dst_port]
    http-request add-header X-Forwarded-Proto https if { ssl_fc }

    use_backend example1 if host_example1
    use_backend example2 if host_example2

backend example1
    option http-server-close
    redirect scheme https if !{ ssl_fc }
    server server1 localhost:9000 check inter 10000 maxconn 50

backend example2
    option http-server-close
    redirect scheme https if !{ ssl_fc }
    server server1 localhost:9010 check inter 10000 maxconn 50

backend letsencrypt
    option http-server-close
    server server1 localhost:9080 maxconn 50

backend failback
    http-request deny

le-renew.sh

#!/bin/bash

set -e

DOMAINS="example1.com,example2.com"
EMAIL="[email protected]"

docker run --rm -v /etc/letsencrypt:/etc/letsencrypt -p 9080:80 \
    quay.io/letsencrypt/letsencrypt \
    certonly --standalone --agree-tos --renew-by-default --standalone-supported-challenges http-01 \
    --email $EMAIL -d $DOMAINS

read -d ',' CERT_DOMAIN <<< "${DOMAINS},"

cat /etc/letsencrypt/live/$CERT_DOMAIN/fullchain.pem /etc/letsencrypt/live/$CERT_DOMAIN/privkey.pem > /etc/haproxy/ssl-bundle.pem

service haproxy reload