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Add iptables restore failure metrics

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As mentioned in issue #80061, in iptables lock contention case,
we can see increasing rate of iptables restore failures because it
need to grab iptables file lock.

The failure metric can provide administrators more insight

Metrics will be collected in kube-proxy iptables and ipvs modes

Signed-off-by: Hui Luo <luoh@vmware.com>
This commit is contained in:
hui luo
2019-08-08 20:43:25 -07:00
parent eadf68ebd9
commit a2ef00c1b1
3 changed files with 15 additions and 0 deletions
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1
pkg/proxy/ipvs/proxier.go
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@@ -1310,6 +1310,7 @@ func (proxier *Proxier) syncProxyRules() {
err = proxier.iptables.RestoreAll(proxier.iptablesData.Bytes(), utiliptables.NoFlushTables, utiliptables.RestoreCounters)
if err != nil {
klog.Errorf("Failed to execute iptables-restore: %v\nRules:\n%s", err, proxier.iptablesData.Bytes())
metrics.IptablesRestoreFailuresTotal.Inc()
// Revert new local ports.
utilproxy.RevertPorts(replacementPortsMap, proxier.portsMap)
return