Help wanted for porting working NGINX config

Help
1

1. Caddy version (caddy version):

v2.4.3

2. How I run Caddy:

Via official docker image

a. System environment:

Ubuntu 20.04.1
Docker 20.10.7

b. Command:

c. Service/unit/compose file:

version: "3.7"
services:

  caddy:
    image: caddy
    container_name: caddy
    hostname: caddy
    restart: unless-stopped
    ports:
      - "80:80"
      - "443:443"
    environment:
      - MY_DOMAIN
    volumes:
      - ./Caddyfile:/etc/caddy/Caddyfile:ro
      - ./data:/data
      - ./config:/config

networks:
  default:
    external:
      name: $DOCKER_MY_NETWORK

d. My complete Caddyfile or JSON config:

{
    # acme_ca https://acme-staging-v02.api.letsencrypt.org/directory
}

docker.{$MY_DOMAIN} {
    reverse_proxy portainer:9000
}

rss.{$MY_DOMAIN} {
    root * /var/www/ttrss
    php_fastcgi unix//var/run/php/php7.4-fpm.sock {
        index index.php
    }
    file_server
}

3. The problem I’m having:

I have an existing installation of a PHP app (Tiny Tiny RSS) at /var/www/ttrss . I was using using NGINX as my reverse proxy and the following config was working for me:

upstream php-handler {
    server unix:/var/run/php/php7.4-fpm.sock;
}

server {
    listen 80;
    listen [::]:80;
    server_name rss.domain.name;
    return 301 https://$server_name:443$request_uri;
}

server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name rss.domain.name;
    root /var/www/ttrss;
    index index.php;

    include snippets/ssl-defaults.conf;

    error_log /var/log/nginx/ttrss.error.log;
    access_log /var/log/nginx/ttrss.access.log;

    location / {
        try_files $uri $uri/ /index.php;
    }

    location ~ \.php$ {
        include fastcgi.conf; # don't use fastcgi_params
        fastcgi_pass php-handler;
        fastcgi_index index.php;
    }
}

I am trying to port this to Caddy, and my attempt so far can be seen in the caddyfile above. However it doesn’t seem to work and I am getting a blank page when I visit the url.

4. Error messages and/or full log output:

I do not have any error message. I just see a blank page when I visit the url.

5. What I already tried:

I have tried to write a caddyfile which can be seen above. But it’s possible that it’s not a complete port of the working NGINX config.

Another possible reason for it not working that I can think of, is that Caddy doesn’t have enough permission. But I am not sure what user it runs as.

6. Links to relevant resources:

2

It looks like you’re just using the stock Caddy image. Caddy does not come with PHP installed. You need to run a php-fpm container alongside Caddy, and that container will actually run your PHP code.

It also doesn’t look like you’ve mounted your site as a volume in the Caddy container, so Caddy can’t see the files.

I recommend looking for guides on setting up nginx+php-fpm in Docker. It’s the same setup for as for Caddy, but there’s more guides for that out in the wild than for Caddy at the moment.

3

Sorry if it was not clear from my post, PHP is already installed in my system, but not as a docker container. I already have a working configuration of PHP and Tiny Tiny RSS and NGINX, all non-dockerized. What I am trying to do now is replace NGINX with dockerized Caddy. Is it not possible? Will it work if I install Caddy as a systemd service, via package manager instead of docker?

4

Well, either dockerize everything, or dockerize nothing. Going halfway will only make it more difficult.

You can install Caddy using our apt repo and run it as a systemd service. If you already have the rest of your environment set up outside of Docker, that’ll be easier.

5

Thanks. Installing Caddy as a systemd service worked for me.

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