How to properly run nginx in docker swarm on MacOS?

Question

I have both compose & stack files with nginx service as

networks:
    custom_overlay_network:
        external: true

services:
   proxy:
        image: nginx:alpine
        ports:
            - target: 80
              published: 80
              protocol: tcp
              mode: host
        networks: 
            - custom_overlay_network

I also have tried a short ports variant:

ports:
    - "80:80"

here are networks settings nginx service in swarm (with/without mode: host)

    "NetworkSettings": {
        "Bridge": "",
        "SandboxID": "c8d0dbff010c840f79d3e6c7ab7c0a225312ae6e28945e310a5f433f23baaadb",
        "HairpinMode": false,
        "LinkLocalIPv6Address": "",
        "LinkLocalIPv6PrefixLen": 0,
        "Ports": {
            "80/tcp": null
        },
        "SandboxKey": "/var/run/docker/netns/c8d0dbff010c",
        "SecondaryIPAddresses": null,
        "SecondaryIPv6Addresses": null,
        "EndpointID": "",
    ...

and here are setting nginx service in compose mode

    "NetworkSettings": {
        "Bridge": "",
        "SandboxID": "22510ac75ac8e48f2c555d2bfc71ab47928ece59445b0db593eab882e26251e2",
        "HairpinMode": false,
        "LinkLocalIPv6Address": "",
        "LinkLocalIPv6PrefixLen": 0,
        "Ports": {
            "80/tcp": [
                {
                    "HostIp": "0.0.0.0",
                    "HostPort": "80"
                }
            ]
        },
        "SandboxKey": "/var/run/docker/netns/22510ac75ac8",
        "SecondaryIPAddresses": null,
        "SecondaryIPv6Addresses": null,

when I run the service as compose - I have access to http://localhost content

but if I run service in swarm mode - I have no access to http://localhost

I also have no access to http://<network IP address>

Answer 1

try something like this

version: '3.7'

networks:
  custom_overlay_network:


services:

  nginx:
    image: nginx:alpine
    hostname: nginx
    restart: always
    ports:
      - 80:80
    networks:
      - custom_overlay_network