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Merge pull request #48624 from derekwaynecarr/log-abridged

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Automatic merge from submit-queue

Log abridged set of rules at v2 in kube-proxy on error

**What this PR does / why we need it**:
this is a follow-on to https://github.com/kubernetes/kubernetes/pull/48085

**Special notes for your reviewer**:
we hit this in operations where we typically run in v2, and would like to log abridged set of output rather than full output.

**Release note**:
```release-note
NONE
```
This commit is contained in:
Kubernetes Submit Queue 2017-08-02 15:26:37 -07:00 committed by GitHub
commit 7b55a2d385
1 changed files with 14 additions and 1 deletions
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15
pkg/proxy/iptables/proxier.go
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@ -1599,7 +1599,20 @@ func (proxier *Proxier) syncProxyRules() {
err = proxier.iptables.RestoreAll(proxier.iptablesData.Bytes(), utiliptables.NoFlushTables, utiliptables.RestoreCounters)
if err != nil {
glog.Errorf("Failed to execute iptables-restore: %v", err)
glog.V(2).Infof("Rules:\n%s", proxier.iptablesData.Bytes())
// ~rough approximation, assume ~100 chars per line
// we log first 1000 bytes, but full list at higher levels
rules := proxier.iptablesData.Bytes()
if len(rules) > 1000 {
abridgedRules := rules[:1000]
if glog.V(4) {
glog.V(4).Infof("Rules:\n%s", rules)
} else {
glog.V(2).Infof("Rules (abridged):\n%s", abridgedRules)
}
} else {
glog.V(2).Infof("Rules:\n%s", rules)
}
// Revert new local ports.
revertPorts(replacementPortsMap, proxier.portsMap)
return