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=== Description (from pull-request) ===
Signed-off-by: Stéphane Graber <stgra...@ubuntu.com>
From 2f468ffc6d136329e762f44b5f6753b28dd4f39c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?St=C3=A9phane=20Graber?= <stgra...@ubuntu.com>
Date: Fri, 29 May 2020 15:29:05 -0400
Subject: [PATCH] lxd/firewall/nft: Enhance support detection
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Signed-off-by: Stéphane Graber <stgra...@ubuntu.com>
---
lxd/firewall/drivers/drivers_nftables.go | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/lxd/firewall/drivers/drivers_nftables.go
b/lxd/firewall/drivers/drivers_nftables.go
index 5b99d3b292..80ce581a07 100644
--- a/lxd/firewall/drivers/drivers_nftables.go
+++ b/lxd/firewall/drivers/drivers_nftables.go
@@ -10,6 +10,7 @@ import (
"strings"
"text/template"
+ "github.com/pborman/uuid"
"github.com/pkg/errors"
deviceConfig "github.com/lxc/lxd/lxd/device/config"
@@ -75,6 +76,19 @@ func (d Nftables) Compat() (bool, error) {
return false, fmt.Errorf("nft version %q is too low, need %q or
above", nftVersion, nftablesMinVersion)
}
+ // Check that nftables works at all (some kernels let you list ruleset
despite missing support).
+ testTable := fmt.Sprintf("lxd_test_%s", uuid.New())
+
+ _, err = shared.RunCommandCLocale("nft", "create", "table", testTable)
+ if err != nil {
+ return false, errors.Wrapf(err, "Failed to create a dummy
table")
+ }
+
+ _, err = shared.RunCommandCLocale("nft", "delete", "table", testTable)
+ if err != nil {
+ return false, errors.Wrapf(err, "Failed to delete a dummy
table")
+ }
+
// Check whether in use by parsing ruleset and looking for existing
rules.
ruleset, err := d.nftParseRuleset()
if err != nil {
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