jwilder/nginx-proxy with cloudflare SSL doesnt - docker

Question

I'm having problem with using jwilder/nginx-proxy with cloudflare ssl (origin key, FULL type SSL).
Everything is working fine (in http) until I activate DNS Proxy of Cloudflare. With the server returning 521 (Web Server Down).
Here's my docker-compose.yaml
version: "2"
services:
nginx-proxy:
image: jwilder/nginx-proxy:alpine
ports:
- 80:80
volumes:
- /var/run/docker.sock:/tmp/docker.sock:ro
- ./certs:/etc/nginx/certs
network_mode: bridge
saraswati-global:
image: asia.gcr.io/ordent-production/ordent/saraswati-global
ports:
- 3000:3000
environment:
- VIRTUAL_HOST=beta.saraswati.global
- VIRTUAL_PORT=3000
- VIRTUAL_PROTO=https
network_mode: bridge
api-healed-id:
image: asia.gcr.io/ordent-production/ordent/api.healed.id
ports:
- 4001:4001
environment:
- VIRTUAL_HOST=dev.healed.id
- VIRTUAL_PORT=4001
- VIRTUAL_PROTO=https
network_mode: bridge
Maybe you guys could help me with the configuration -
Here's the nginx configuration created by above config :
# If we receive X-Forwarded-Proto, pass it through; otherwise, pass along the
# scheme used to connect to this server
map $http_x_forwarded_proto $proxy_x_forwarded_proto {
default $http_x_forwarded_proto;
'' $scheme;
}
# If we receive X-Forwarded-Port, pass it through; otherwise, pass along the
# server port the client connected to
map $http_x_forwarded_port $proxy_x_forwarded_port {
default $http_x_forwarded_port;
'' $server_port;
}
# If we receive Upgrade, set Connection to "upgrade"; otherwise, delete any
# Connection header that may have been passed to this server
map $http_upgrade $proxy_connection {
default upgrade;
'' close;
}
# Apply fix for very long server names
server_names_hash_bucket_size 128;
# Default dhparam
ssl_dhparam /etc/nginx/dhparam/dhparam.pem;
# Set appropriate X-Forwarded-Ssl header
map $scheme $proxy_x_forwarded_ssl {
default off;
https on;
}
gzip_types text/plain text/css application/javascript application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;
log_format vhost '$host $remote_addr - $remote_user [$time_local] '
'"$request" $status $body_bytes_sent '
'"$http_referer" "$http_user_agent"';
access_log off;
ssl_protocols TLSv1.2 TLSv1.3;
ssl_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:D
ssl_prefer_server_ciphers off;
resolver 172.26.0.2;
# HTTP 1.1 support
proxy_http_version 1.1;
proxy_buffering off;
proxy_set_header Host $http_host;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $proxy_connection;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $proxy_x_forwarded_proto;
proxy_set_header X-Forwarded-Ssl $proxy_x_forwarded_ssl;
proxy_set_header X-Forwarded-Port $proxy_x_forwarded_port;
# Mitigate httpoxy attack (see README for details)
proxy_set_header Proxy "";
server {
server_name _; # This is just an invalid value which will never trigger on a real hostname.
listen 80;
access_log /var/log/nginx/access.log vhost;
return 503;
}
# beta.saraswati.global
upstream beta.saraswati.global {
## Can be connected with "bridge" network
# ordent-production-host_saraswati-global_1
server 172.17.0.3:3000;
}
server {
server_name beta.saraswati.global;
listen 80 ;
access_log /var/log/nginx/access.log vhost;
location / {
proxy_pass https://beta.saraswati.global;
}
}
# dev.healed.id
upstream dev.healed.id {
## Can be connected with "bridge" network
# ordent-production-host_api-healed-id_1
server 172.17.0.4:4001;
}
server {
server_name dev.healed.id;
listen 80 ;
access_log /var/log/nginx/access.log vhost;
location / {
proxy_pass https://dev.healed.id;
}
}

Answer 1

The issue is caused because of this when you are defining the nginx-proxy service:
ports:
- 80:80
As you enabled SSL on Cloudflare, the default port will be 443, not 80.
So the nginx-proxy needs to listen to 443 port and the correct way is:
ports:
- 443:443