Merge pull request #669 from containernetworking/jell/per_if_sysctl

Allow setting sysctls on a particular interface
containernetworking · Nov 24, 2021 · 57e95c5 · 57e95c5
2 parents 0920090 + c16cff9
commit 57e95c5
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/plugins/meta/tuning/tuning.go b/plugins/meta/tuning/tuning.go
@@ -325,6 +325,11 @@ func cmdAdd(args *skel.CmdArgs) error {
 
 	err = ns.WithNetNSPath(args.Netns, func(_ ns.NetNS) error {
 		for key, value := range tuningConf.SysCtl {
+			// If the key contains `IFNAME` - substitute it with args.IfName
+			// to allow setting sysctls on a particular interface, on which
+			// other operations (like mac/mtu setting) are performed
+			key = strings.Replace(key, "IFNAME", args.IfName, 1)
+
 			fileName := filepath.Join("/proc/sys", strings.Replace(key, ".", "/", -1))
 
 			// Refuse to modify sysctl parameters that don't belong