Docker - caddy + php-fpm, network problem.

[sanv92]

I am using Docker with [caddy + php-fpm] containers, where I created own network. Network name is wordpress_net. Why on nginx it's works fine, but on caddy, I have this strange problem with this configuration.

I need use this [container_name].[network_name] php-fpm.wordpress_net

  fastcgi / php-fpm.wordpress_net:9000 php {
      index index.php
  }

---

Instead of this php-fpm

  fastcgi / php-fpm:9000 php {
      index index.php
  }

---

for nginx and other soft, enough just write php-fpm.

Example: root@69f36ea04b37:/srv/default# getent hosts php-fpm 172.18.0.3 php-fpm

root@69f36ea04b37:/srv/default# getent hosts php-fpm.wordpress_net 172.18.0.3 php-fpm.wordpress_net

=======

It's strange, why this not working with php-fpm?

My tests: 1) Nginx + php-fpm (separate containers) in host network - works fine Caddy + php-fpm (separate containers) in host network - works fine 2) Nginx + php-fpm (separate containers) in my custom network "wordpress_net" - fine Caddy + php-fpm (separate containers) in my custom network "wordpress_net" - fail

[krishamoud]

Just for clarity.

Are you running in swarm mode with an overlay network? If so, is it swarm 1.12 or greater?

Could you share the dockerfile(s)/images and docker run commands and/or docker-compose template?

[sanv92]

no it's not swarm, it's just 1-one server, with 3 containers. 1) Nginx on dokcer-compose works fine Caddy on docker-compose works fine

2) When I run on server via Docker run Nginx works fine Caddy not working

Works only this example on producation:

 fastcgi / php-fpm.wordpress_net:9000 php {
      index index.php
  }

[sanv92]

I found something strange, maybe this will helps find problem: I made my docker-compose and run it on macOS, debian, centos, with next configuration for php:

fastcgi / phpfpm:9000 php {
    index index.php
}

1) MacOS - works 2) debian - works 3) Centos - fail

same again for macOS, debian, centos, but with network:

fastcgi / phpfpm.caddy_network:9000 php {
    index index.php
}

1) MacOS - works 2) debian - works 3) Centos - works

============================== docker-compose configuration:

version: '2'

services:

### DATABASES #############################
  mariadb:
    image: mariadb:latest
    volumes:
      - ./mysql/:/var/lib/mysql/:rw
    container_name: mariadb_container
    #network_mode: "host"
    ports:
      - "3306:3306"
    environment:
      MYSQL_DATABASE: homestead
      MYSQL_USER: homestead
      MYSQL_PASSWORD: secret
      MYSQL_ROOT_PASSWORD: root
    networks:
      - dev_network

### PHP-FPM #############################
  phpfpm:
    build:
      context: ./public
      dockerfile: Dockerfile
    container_name: phpfpm_container
    #network_mode: "host"
    expose:
      - "9000"
    networks:
      - dev_network

### WEBSERVER #############################
  caddy:
    image: registry.gitlab.com/container_images/caddy
    container_name: caddy_container
    volumes_from:
      - "phpfpm"
    volumes:
      - ./containers/caddy/:/etc/caddy/:rw
    #network_mode: "host"
    ports:
      - "80:80"
      - "443:443"
    networks:
      - dev_network

networks:
  dev_network:
    driver: bridge

[mholt]

This may be better suited for our forum, since I'm not sure/convinced it's a bug in Caddy itself, might just be a misconfiguration of a Docker container or something. Feel free to ask here: https://forum.caddyserver.com - where the container gurus tend to hang out more!