Wrong nginx upstream configuration on IPv4-only daemons

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Bug Summary

In default configuration we have following nginx.conf in tools/docker-compose/_sources/nginx.conf:

    upstream uwsgi {
        server localhost:8050;
    }

    upstream runserver {
        server localhost:8052;
    }

    upstream daphne {
        server localhost:8051;
    }

inside container following /etc/hosts is used:

bash-5.1# cat /etc/hosts
127.0.0.1       localhost
::1     localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
172.28.0.5      awx_1

So localhost is resolved on IPv4/IPv6 dual stack. But daphne and uwsgi endpoint listening only on IPv4:

 nsenter -t 257902 -n netstat -nlep
tcp        0      0 127.0.0.1:8051          0.0.0.0:*               LISTEN      0          3429118    258362/python3.9
tcp        0      0 127.0.0.1:8050          0.0.0.0:*               LISTEN      0          3432861    258395/uwsgi

So all connection to them fails with following in /var/log/nginx/error.log inside tools_awx_1:

2024/03/22 10:58:46 [error] 405#405: *9070 connect() failed (111: Connection refused) while connecting to upstream, client: 192.168.5.194, server: _, request: "GET /websocket/ HTTP/1.1", upstream: "http://[::1]:8051/websocket/", host: "****"
2024/03/22 10:58:44 [error] 405#405: *9067 connect() failed (111: Connection refused) while connecting to upstream, client: 192.168.5.194, server: _, request: "GET /api/v2/dashboard/graphs/jobs/?job_type=all&period=month HTTP/1.1", upstream: "uwsgi://[::1]:8050", host: "***", referrer: "https://***/"

After replacing localhost with 127.0.0.1 no error in nginx.

AWX version

24.0.0

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Installation method

docker development environment

Modifications

Ansible version

No response

Operating system

Ubuntu 22.04.4

Web browser

No response

Steps to reproduce

Just perform clean install and look through container nginx error.log file

Expected results

No errors

Actual results

Tons of errors

Additional information

No response

ansible / awx