kubernetes/cmd/kube-proxy
Kubernetes Submit Queue 10704b2ae1 Merge pull request #44919 from kinvolk/robertgzr/kubeproxy-check-conntrack-before-write
Automatic merge from submit-queue

[WIP] Skip resize of nf_conntrack/parameters/hashsize if not necessary

**What this PR does / why we need it**:
Linux does not support writing to `/sys/module/nf_conntrack/parameters/hashsize` when the writer process is not in the initial network namespace
(https://github.com/torvalds/linux/blob/v4.10/net/netfilter/nf_conntrack_core.c#L1795-L1796).

Usually that's fine. But in some configurations such as with https://github.com/kinvolk/kubeadm-nspawn, kube-proxy is in another netns.

Therefore, check if writing in hashsize is necessary and skip the writing if not.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
```
2017-05-03 23:25:31 -07:00
..
app Merge pull request #44919 from kinvolk/robertgzr/kubeproxy-check-conntrack-before-write 2017-05-03 23:25:31 -07:00
BUILD Add kube-proxy config file support 2017-05-01 18:02:47 -04:00
proxy.go Add kube-proxy config file support 2017-05-01 18:02:47 -04:00