Description of problem:

No data point on Openshift Logging colllection dashboard on the IPv6 single stack. The port 24231 is binded to IPv4 address. It should bind to ipv6 address.

[sinks.prometheus_output]
type = "prometheus_exporter"
inputs = ["add_nodename_to_metric"]
address = "0.0.0.0:24231"
default_namespace = "collector"

By the way, collector.openshift-logging.svc:2112 works well

Version-Release number of selected component (if applicable):

Logging 5.6.0

How reproducible:

Always

Steps to Reproduce:

1) Launch a single stack cluster 
2) Deploy cluster logging for forward logs to default via vector.
3) check the metrics on collector
oc exec <collector_pod> – curl -k https://collector.openshift-logging.svc:24231/metrics
oc exec <collector_pod> – curl -6 -g -k https://[::]:24231/metrics

Actual results:

curl: (7) Failed to connect to collector.openshift-logging.svc port 24231: Connection refused
command terminated with exit code 7

Additional info:

Works well  on both IPv4 and IPv6 single stack cluster when I use address = "[::]:24231