tests: run a test inside a QEMU VM

Use the script test/run.py to run a test named test_vm_tap
inside a QEMU VM. The run script builds out a virtual env,
launches a light weight QEMU VM, mounts host directories,
starts VPP inside the VM and runs the test. The test named
test_vm_tap, creates two tap v2 interfaces in separate Linux
namespaces and using iPerf, streams traffic between the VM
and VPP. All data files are stored in the directory named
/tmp/vpp-vm-tests. To clean up, use the make test-wipe
command.
Usage:
test/run.py --vm --debug --test test_vm_tap

Type: improvement

Change-Id: I4425dbef52acee1e5b8af5acaa169b89a2c0f171
Signed-off-by: Naveen Joy <najoy@cisco.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/test/vpp_qemu_utils.py b/test/vpp_qemu_utils.py
new file mode 100644
index 00000000000..50fc1c865a6
--- /dev/null
+++ b/test/vpp_qemu_utils.py
@@ -0,0 +1,20 @@
+#!/usr/bin/env python
+
+# Utility functions for QEMU tests ##
+
+import subprocess
+
+
+def create_namespace(ns):
+    try:
+        subprocess.run(["ip", "netns", "add", ns])
+    except subprocess.CalledProcessError as e:
+        raise Exception("Error creating namespace:", e.output)
+
+
+def list_namespace(ns):
+    """List the IP address of a namespace"""
+    try:
+        subprocess.run(["ip", "netns", "exec", ns, "ip", "addr"])
+    except subprocess.CalledProcessError as e:
+        raise Exception("Error listing namespace IP:", e.output)