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Allow setting sysctls on a particular interface #669

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Nov 24, 2021
Merged

Allow setting sysctls on a particular interface #669

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5 changes: 5 additions & 0 deletions plugins/meta/tuning/tuning.go
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Original file line number Diff line number Diff line change
Expand Up @@ -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
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