1 files changed, 66 insertions, 0 deletions
diff --git a/docker/neutron/neutron-base/ip_wrapper.py b/docker/neutron/neutron-base/ip_wrapper.py
new file mode 100755
index 000000000..591fca6f4
--- /dev/null
+++ b/docker/neutron/neutron-base/ip_wrapper.py
@@ -0,0 +1,66 @@
+#!/usr/bin/env python
+
+# Copyright 2015 Sam Yaple
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This file exists because we want to create and delete any network
+# namespaces from the host mount namespace. This allows the host to
+# access all of the neutron network namespaces as well as all
+# containers that bind mount /run/netns from the host.
+
+# This is required for "thin" neutron containers to function properly
+
+import nsenter
+import subprocess
+import sys
+
+
+def host_mnt_exec(cmd):
+    try:
+        with nsenter.ExitStack() as stack:
+            stack.enter_context(
+                nsenter.Namespace(
+                    '1',
+                    'mnt',
+                    proc='/opt/kolla/host_proc/'))
+            process_ = subprocess.Popen(cmd)
+
+    except Exception as e:
+        print(
+            "An error has occured with a component that Kolla manages."
+            " Please file a bug")
+        print("Error: ", e)
+
+    return process_
+
+
+if len(sys.argv) > 2:
+    # We catch all commands that ip will accept that refer
+    # to creating or deleteing a Network namespace
+    if str(sys.argv[1]).startswith("net") and (
+            str(sys.argv[2]).startswith("a") or
+            str(sys.argv[2]).startswith("d")):
+        # This cmd is executed in the host mount namespace
+        cmd = ["/usr/bin/env", "ip"] + sys.argv[1:]
+        sys.exit(host_mnt_exec(cmd).returncode)
+    else:
+        cmd = ["/opt/kolla/ip"] + sys.argv[1:]
+else:
+    cmd = ["/opt/kolla/ip"]
+
+    if len(sys.argv) == 2:
+        cmd = cmd + sys.argv[1:]
+
+process_ = subprocess.Popen(cmd)
+sys.exit(process_.returncode)