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=== Description (from pull-request) ===
Prevents host-side interface getting IPv6 link-local address which isn't needed as interface is added to bridge.
Signed-off-by: Thomas Parrott <thomas.parr...@canonical.com>
From 9716f03bd2914721e9eadd3a3048b94a6cbe9046 Mon Sep 17 00:00:00 2001
From: Thomas Parrott <thomas.parr...@canonical.com>
Date: Mon, 30 Mar 2020 18:22:45 +0100
Subject: [PATCH] lxd/device/nic/bridged: Disables IPv6 on bridged host side
interface
Prevents host-side interface getting IPv6 link-local address which isn't needed
as interface is added to bridge.
Signed-off-by: Thomas Parrott <thomas.parr...@canonical.com>
---
lxd/device/nic_bridged.go | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/lxd/device/nic_bridged.go b/lxd/device/nic_bridged.go
index 54271695e9..5807c82274 100644
--- a/lxd/device/nic_bridged.go
+++ b/lxd/device/nic_bridged.go
@@ -213,6 +213,13 @@ func (d *nicBridged) Start() (*deviceConfig.RunConfig,
error) {
return nil, err
}
+ // Disable IPv6 on host-side veth interface (prevents host-side
interface getting link-local address)
+ // which isn't needed because the host-side interface is connected to a
bridge.
+ err = util.SysctlSet(fmt.Sprintf("net/ipv6/conf/%s/disable_ipv6",
saveData["host_name"]), "1")
+ if err != nil && !os.IsNotExist(err) {
+ return nil, err
+ }
+
// Apply and host-side network filters (uses enriched host_name from
networkSetupHostVethDevice).
err = d.setupHostFilters(nil)
if err != nil {
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