Merge pull request #29181 from Random-Liu/add-doc-for-node-e2e-kubenet-flag

Automatic merge from submit-queue

Node E2E: Add document for node e2e --disable-kubenet flag.

Address the comment https://github.com/kubernetes/kubernetes/pull/28213#discussion_r70137103.
Offline discussed with @vishh, we should document the `--disable-kubenet` flag in node e2e test.

1 files changed, 20 insertions, 0 deletions

diff --git a/e2e-node-tests.md b/e2e-node-tests.md
index 8e802d75..04b82799 100644
--- a/e2e-node-tests.md
+++ b/e2e-node-tests.md
@@ -205,6 +205,26 @@ less useful for catching flakes related creating the instance from an image.**
 make test-e2e-node REMOTE=true RUN_UNTIL_FAILURE=true
 ```
 
+## Run tests with kubenet network plugin
+
+[kubenet](http://kubernetes.io/docs/admin/network-plugins/#kubenet) is
+the default network plugin used by kubelet since Kubernetes 1.3.  The
+plugin requires [CNI](https://github.com/containernetworking/cni) and
+[nsenter](http://man7.org/linux/man-pages/man1/nsenter.1.html).
+
+Currently, kubenet is enabled by default for Remote execution `REMOTE=true`,
+but disabled for Local execution.  **Note: kubenet is not supported for
+local execution currently. This may cause network related test result to be
+different for Local and Remote execution. So if you want to run network
+related test, Remote execution is recommended.**
+
+To enable/disable kubenet:
+
+```sh
+make test_e2e_node TEST_ARGS="--disable-kubenet=true" # enable kubenet
+make test_e2e_node TEST_ARGS="--disable-kubenet=false" # disable kubenet
+```
+
 ## Additional QoS Cgroups Hierarchy level testing
 
 For testing with the QoS Cgroup Hierarchy enabled, you can pass --cgroups-per-qos flag as an argument into Ginkgo using TEST_ARGS