Change:
return "ip" } <ins> // IPPortVar allows IP or IP:port formats. type IPPortVar struct { Val *string } func (v IPPortVar) Set(s string) error { if len(s) == 0 { v.Val = nil return nil } if v.Val == nil { // it's okay to panic here since this is programmer error panic("the string pointer passed into IPPortVar should not be nil") } // Both IP and IP:port are valid. // Attempt to parse into IP first. if net.ParseIP(s) != nil { *v.Val = s return nil } // Can not parse into IP, now assume IP:port. host, port, err := net.SplitHostPort(s) if err != nil { return fmt.Errorf("%q is not in a valid format (ip or ip:port): %v", s, err) } if net.ParseIP(host) == nil { return fmt.Errorf("%q is not a valid IP address", host) } if _, err := strconv.Atoi(port); err != nil { return fmt.Errorf("%q is not a valid number", port) } *v.Val = s return nil } func (v IPPortVar) String() string { if v.Val == nil { return "" } return *v.Val } func (v IPPortVar) Type() string { return "ipport" } </ins> type PortRangeVar struct { Val *string }

Discussion:
Whenever I try to change kube proxy metrics bind using flag , it gives me: Then, I the port , the error changes. I expect the metrics server to listen to 0.0.0.0:. Do I miss something? Environment: Kubernetes version: v1.7.8 Cloud provider or hardware configuration**: on-premise OS (e.g. from /etc/os-release): debian/stretch Kernel (e.g. ): Linux R11U2-7U20N-1 4.9.0-3-amd64 SMP Debian 4.9.30-2+deb9u3 (2017-08-06) x86_64 GNU/Linux Install tools: Others:
/sig network /area kube-proxy
The is being and does NOT allow specifying a port. Have you tried using a config file? The field allows you to specify a port (an example ).
/assign
Turned out we use a wrong type when validating and . Sent for fixing this. Will try to cherrypick the fix as well.
New finding, is broken on HEAD in a different way: Seems to be introduced by
Humm..We have some default logic for : Seems like for some reason it does not auto append the default port number OR the validation happens before defaulting.
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/remove-lifecycle rotten
I got the same issue 0.0.0.0 0.0.0.0: both not work with kube-proxy 1.9.3 amd64
It is a BUG. Conflict between componentconfig.IPVar.Set(s string) and validation.validateHostPort.

Could you elaborate the issue a bit more? Which k8s version are you on?
I also meet the same issue with kubernetes 1.8. It's impossibe for Prometheus to fetch metrics from 127.0.0.1: in my case, any workaround? I think we'd better reopen this issue.
metrics binds to by default, are you trying to modify port as well? Thanks for reporting, I confirm the issue is remaining. (or any ip:port) does not work as intended even after the fix. Reopening this and filed a new issue for conflict kubeproxyconfig validation. /reopen
Thanks for reopening the issue. I want to bind metrics to 0.0.0.0: as well. With address 127.0.0.1:, Prometheus cannot pull metrics from this address unless they are on the same node.
is fixing this.
Issues go stale after 90d of inactivity. Mark the issue as fresh with . Stale issues rot after an additional 30d of inactivity and eventually close. If this issue is safe to close now please do so with . Send feedback to sig-testing, kubernetes/test-infra and/or . /lifecycle stale
/remove-lifecycle stale
Issues go stale after 90d of inactivity. Mark the issue as fresh with . Stale issues rot after an additional 30d of inactivity and eventually close. If this issue is safe to close now please do so with . Send feedback to sig-testing, kubernetes/test-infra and/or . /lifecycle stale
/remove-lifecycle stale (I just got bitten by this on kube-proxy v1.9.10)
should fix this.
Closing this as is merged. /close
Closing this issue. <detailsIn response to : Closing this as is merged. /close Instructions for interacting with me using PR comments are available . If you have questions or suggestions related to my behavior, please file an issue against the repository. </details