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Kubernetes Submit Queue c1a73ea685 Merge pull request #59286 from prameshj/udp-conntrack

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Delete stale UDP conntrack entries that use hostPort

**What this PR does / why we need it**:
This PR introduces a change to delete stale conntrack entries for UDP connections, specifically for udp connections that use hostPort. When the pod listening on that udp port get updated/restarted(and gets a new ip address), these entries need to be flushed so that ongoing udp connections can recover once the pod is back and the new iptables rules have been installed. 
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #59033

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

2018-02-23 19:54:08 -08:00