Add flag to overwrite network backend from config

To make testing easier we can overwrite the network backend with the
global `--network-backend` option.

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

2 files changed, 17 insertions, 0 deletions

diff --git a/libpod/options.go b/libpod/options.go
index 250b16556..0cc4c784c 100644
--- a/libpod/options.go
+++ b/libpod/options.go
@@ -227,6 +227,19 @@ func WithNetworkCmdPath(path string) RuntimeOption {
 	}
 }
 
+// WithNetworkBackend specifies the name of the network backend.
+func WithNetworkBackend(name string) RuntimeOption {
+	return func(rt *Runtime) error {
+		if rt.valid {
+			return define.ErrRuntimeFinalized
+		}
+
+		rt.config.Network.NetworkBackend = name
+
+		return nil
+	}
+}
+
 // WithCgroupManager specifies the manager implementation name which is used to
 // handle cgroups for containers.
 // Current valid values are "cgroupfs" and "systemd".
diff --git a/libpod/runtime.go b/libpod/runtime.go
index 71bfaff9a..c751df79b 100644
--- a/libpod/runtime.go
+++ b/libpod/runtime.go
@@ -499,6 +499,10 @@ func makeRuntime(ctx context.Context, runtime *Runtime) (retErr error) {
 		if err != nil {
 			return errors.Wrapf(err, "could not create network interface")
 		}
+		if runtime.config.Network.NetworkBackend == "" {
+			// set backend to cni so that podman info can display it
+			runtime.config.Network.NetworkBackend = "cni"
+		}
 
 	case "netavark":
 		netavarkBin, err := runtime.config.FindHelperBinary("netavark", false)