Mercure keeps trying to bind to port 80

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Mercure keeps trying to bind to port 80

Svdb

9/10/23, 6:08 AM

I'm using the Mercure hub 0.13, everything works fine on my development machine, but on my test server the hub keeps on trying to bind on port 80, resulting in a error, as nginx is already running on port 80.

run: loading initial config: loading new config: http app module: start: tcp: listening on :80: listen tcp :80: bind: address already in use

I'm starting the hub with the following command:

MERCURE_PUBLISHER_JWT_KEY=$(cat publisher.key.pub) \
MERCURE_PUBLISHER_JWT_ALG=RS256 \
MERCURE_SUBSCRIBER_JWT_KEY=$(cat publisher.key.pub) \
MERCURE_SUBSCRIBER_JWT_ALG=RS256 \
./mercure run -config Caddyfile.dev

Caddyfile.dev is as follows:

# Learn how to configure the Mercure.rocks Hub on https://mercure.rocks/docs/hub/config
{
        {$GLOBAL_OPTIONS}
}

{$SERVER_NAME:localhost:3000}

log

route {
        redir / /.well-known/mercure/ui/
        encode zstd gzip

        mercure {
                # Transport to use (default to Bolt)
                transport_url {$MERCURE_TRANSPORT_URL:bolt://mercure.db}
                # Publisher JWT key
                publisher_jwt {env.MERCURE_PUBLISHER_JWT_KEY} {env.MERCURE_PUBLISHER_JWT_ALG}
                # Subscriber JWT key
                subscriber_jwt {env.MERCURE_SUBSCRIBER_JWT_KEY} {env.MERCURE_SUBSCRIBER_JWT_ALG}
                # Permissive configuration for the development environment
                cors_origins *
                publish_origins *
                demo
                anonymous
                subscriptions
                # Extra directives
                {$MERCURE_EXTRA_DIRECTIVES}
        }

        respond /healthz 200

        respond "Not Found" 404
}

When I provider the SERVER_NAME as an environment variable, without a domain, SERVER_NAME=:3000, the hub actually starts on port 3000, but runs in http mode, which only allows for anonymous subscriptions and is not what I need.

Server:

Operating System: CentOS Stream 8
Kernel: Linux 4.18.0-383.el8.x86_64
Architecture: x86-64

Full output when trying to start the Mercure hub:

2022/05/10 04:50:29.605 INFO    using provided configuration    {"config_file": "Caddyfile.dev", "config_adapter": ""}
2022/05/10 04:50:29.606 WARN    input is not formatted with 'caddy fmt' {"adapter": "caddyfile", "file": "Caddyfile.dev", "line": 3}
2022/05/10 04:50:29.609 INFO    admin   admin endpoint started  {"address": "tcp/localhost:2019", "enforce_origin": false, "origins": ["localhost:2019", "[::1]:2019", "127.0.0.1:2019"]}
2022/05/10 04:50:29.610 INFO    http    enabling automatic HTTP->HTTPS redirects    {"server_name": "srv0"}
2022/05/10 04:50:29.610 INFO    tls.cache.maintenance   started background certificate maintenance  {"cache": "0xc0003d6150"}
2022/05/10 04:50:29.627 INFO    tls cleaning storage unit   {"description": "FileStorage:/root/.local/share/caddy"}
2022/05/10 04:50:29.628 INFO    tls finished cleaning storage units
2022/05/10 04:50:29.642 INFO    pki.ca.local    root certificate is already trusted by system   {"path": "storage:pki/authorities/local/root.crt"}
2022/05/10 04:50:29.643 INFO    tls.cache.maintenance   stopped background certificate maintenance  {"cache": "0xc0003d6150"}
run: loading initial config: loading new config: http app module: start: tcp: listening on :80: listen tcp :80: bind: address already in use

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Mercure keeps trying to bind to port 80

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