From eff2c01c1b0d0051af6ae5d2e6d7052498dc1698 Mon Sep 17 00:00:00 2001
From: Jeffrey Clark <h0tw1r3@users.noreply.github.com>
Date: Mon, 20 Jun 2022 10:22:53 -0500
Subject: [PATCH] cni: add loopback to linux bridge (#13428)

CNI changed how to bring up the interface in v0.2.0.
Support was moved to a new loopback plugin.

https://github.com/containernetworking/cni/pull/121

Fixes #10014
---
 .changelog/13428.txt                          | 3 +++
 client/allocrunner/networking_bridge_linux.go | 3 +++
 2 files changed, 6 insertions(+)
 create mode 100644 .changelog/13428.txt

diff --git a/.changelog/13428.txt b/.changelog/13428.txt
new file mode 100644
index 00000000000..70203bdbc71
--- /dev/null
+++ b/.changelog/13428.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+cni: Fixed a bug where loopback address was not set for all drivers
+```
diff --git a/client/allocrunner/networking_bridge_linux.go b/client/allocrunner/networking_bridge_linux.go
index 1c331bddd22..732dd85a783 100644
--- a/client/allocrunner/networking_bridge_linux.go
+++ b/client/allocrunner/networking_bridge_linux.go
@@ -142,6 +142,9 @@ const nomadCNIConfigTemplate = `{
 	"cniVersion": "0.4.0",
 	"name": "nomad",
 	"plugins": [
+		{
+			"type": "loopback"
+		},
 		{
 			"type": "bridge",
 			"bridge": "%s",