IPv6 request to Federation Port are forwarded to the docker container as IPv6 (external nginx)

[JokerGermany]

This is the error

2022/07/01 14:29:00 [error] 27625#27625: *328278 connect() failed (111: Connection refused) while connecting to upstream, client: 127.0.0.1, server: , request: "GET /_matrix/federation/v1/query/profile?user_id=%40_discordpuppet__465226356335050754%3Aexample2.com&field=avatar_url HTTP/1.0", upstream: "http://[::1]:8048/_matrix/federation/v1/query/profile?user_id=%40_discordpuppet__465226356335050754%3Aexample2.com&field=avatar_url", host: "matrix.example2.com"

The problem is this file:
/matrix/nginx-proxy/conf.d/matrix-synapse.conf

server {
        listen 12080;

        server_tokens off;
        root /dev/null;

        gzip on;
        gzip_types text/plain application/json;




        location / {
                        proxy_pass http://127.0.0.1:8008;

                proxy_set_header Host $host;

                client_body_buffer_size 25M;
                client_max_body_size 50M;
                proxy_max_temp_file_size 0;
        }
}

server {
        listen 12088;

        server_tokens off;

        root /dev/null;

        gzip on;
        gzip_types text/plain application/json;


        location / {
                        proxy_pass http://localhost:8048;

                proxy_set_header Host $host;

                client_body_buffer_size 25M;
                client_max_body_size 150M;
                proxy_max_temp_file_size 0;
        }
}

When I edit proxy_pass http://localhost:8048; into proxy_pass http://127.0.0.1:8048; the error vanished.
I try to fix this problem myself in the playbook, but i ended up at line 196 proxy_pass http://media_repository_upstream$request_uri; in /matrix-docker-ansible-deploy/roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-synapse.conf.j2
This leads to localhost and this produce problems with ipv6 request and therefore needs to be changed to 127.0.0.1
But i don't know how media_repository_upstream$request_uri is created...

[spantaleev]

Fixed in 2e4fad6.

---

http://media_repository_upstream is one of the media repository worker addresses, defined in the upstream media_repository_upstream configuration clause.

These are made to go to 127.0.0.1:{{ worker.port }} when nginx is disabled, or to the specific matrix-synapse-worker-{{ worker.type }}-{{ worker.instanceId }}:{{ worker.port }} media worker container otherwise.