prometheus / prometheus/node_exporter

OpenBSD IPV6 bad behaviour

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Go
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Description

Hi,

I have noticed a strange behaviour with

  • OpenBSD 7.7
  • Node Exporter 1.9.1

WHen I start the process like
./node_exporter --web.listen-address="[::]:9090"

It returns as listen address
time=2025-08-27T20:10:00.800Z level=INFO source=tls_config.go:350 msg="TLS is disabled." http2=false address=0.0.0.0:9090

It seems to listen only with IPV4

I have tried on Linux (Debian 11) and its OK.

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Research direction

Reproduce the issue on OpenBSD 7.7 with Node Exporter 1.9.1 using ./node_exporter --web.listen-address="[::]:9090", then compare the reported address with the Debian 11 behavior. Done means the IPv6 listen address is retained on OpenBSD, rather than being reported as 0.0.0.0:9090.

Written by the indexing model from the issue text.

Assessment

Tech stack
go
Domain
networking, operating-systems
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
38/100

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