[lxc-devel] [lxd/master] lxd/init: Allow using an existing bridge

[stgraber on Github]

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From 19f2f6da83eed78c6fac180b6049168487901d26 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?St=C3=A9phane=20Graber?= <stgraber at ubuntu.com>
Date: Thu, 29 Mar 2018 15:33:42 -0400
Subject: [PATCH] lxd/init: Allow using an existing bridge
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Signed-off-by: Stéphane Graber <stgraber at ubuntu.com>
---
 lxd/main_init_interactive.go | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/lxd/main_init_interactive.go b/lxd/main_init_interactive.go
index a616e31ef..8094fad65 100644
--- a/lxd/main_init_interactive.go
+++ b/lxd/main_init_interactive.go
@@ -241,6 +241,32 @@ func (c *cmdInit) askClustering(config *initData, d lxd.ContainerServer) error {
 
 func (c *cmdInit) askNetworking(config *initData, d lxd.ContainerServer) error {
 	if !cli.AskBool("Would you like to create a new network bridge (yes/no) [default=yes]? ", "yes") {
+		if cli.AskBool("Would you like to configure LXD to use an existing bridge or host interface (yes/no) [default=no]? ", "no") {
+			for {
+				name := cli.AskString("Name of the existing bridge or host interface: ", "", nil)
+
+				if !shared.PathExists(fmt.Sprintf("/sys/class/net/%s", name)) {
+					fmt.Println("The requested interface doesn't exist. Please choose another one.")
+					continue
+				}
+
+				nicType := "macvlan"
+				if shared.PathExists(fmt.Sprintf("/sys/class/net/%s/bridge", name)) {
+					nicType = "bridged"
+				}
+
+				// Add to the default profile
+				config.Profiles[0].Devices["eth0"] = map[string]string{
+					"type":    "nic",
+					"nictype": nicType,
+					"name":    "eth0",
+					"parent":  name,
+				}
+
+				break
+			}
+		}
+
 		return nil
 	}