PR #9510 introduces an additional IPv6 listener in gateway which breaks on systems without IPv6 support

[tjuerge]

Describe the bug
PR #9510 introduces an additional IPv6 listener in gateway which fails on systems with single-stack setup (IPv4 only):

nginx: [emerg] socket() :8080 failed (97: Address family not supported by protocol)

Btw. in the Helm charts of Tempo and Mimir is IPv6 not activated by default (yet).

To Reproduce
Steps to reproduce the behavior:

1. Deploy Loki with Helm chart version 5.5.10+ on a IPv4-only system
2. Check gateway log

Expected behavior
Loki's gateway should run on a IPv4-only system like it does before Helm chart version 5.5.10.

Environment:

• Infrastructure: Kubernetes 1.26.5 (single-stack -> no IPv6)
• Deployment tool: Helm chart grafana/loki v5.5.10+

Screenshots, Promtail config, or terminal output
Gateway / Nginx log:

nginx: [emerg] socket() :8080 failed (97: Address family not supported by protocol)

[ssams]

just ran into this issue, using the Helm chart grafana/loki v5.15.0.

In case it helps others with this problem, I'm currently using the following workaround which attempts to keep as much as possible from the original values to simplify updates in the meantime. Use as values when deploying:

gateway:
  nginxConfig:
    file: |
      {{- include "loki.nginxFile" . | replace "listen             [::]:8080;" "" | indent 2 -}}

[bimax]

Does anyone know if this is going to be added as values config option? Maybe there are pull request somewhere in the repo?

[Pionerd]

Created a PR to make this configurable in a bit nicer way: #11722