Implement bandwidth capabilties

Signed-off-by: Johannes M. Scheuermann <joh.scheuer@gmail.com>

vendor/github.com/containerd/go-cni/namespace_opts.go

@@ -33,6 +33,15 @@ func WithCapabilityIPRanges(ipRanges []IPRanges) NamespaceOpts {
 	}
 }
 
+// WithCapabilityBandWitdh adds support for traffic shaping:
+// https://github.com/heptio/cni-plugins/tree/master/plugins/meta/bandwidth
+func WithCapabilityBandWidth(bandWidth BandWidth) NamespaceOpts {
+	return func(c *Namespace) error {
+		c.capabilityArgs["bandwidth"] = bandWidth
+		return nil
+	}
+}
+
 func WithCapability(name string, capability interface{}) NamespaceOpts {
 	return func(c *Namespace) error {
 		c.capabilityArgs[name] = capability

vendor/github.com/containerd/go-cni/opts.go

@@ -86,6 +86,12 @@ func WithLoNetwork(c *libcni) error {
 // WithConf can be used to load config directly
 // from byte.
 func WithConf(bytes []byte) CNIOpt {
+	return WithConfIndex(bytes, 0)
+}
+
+// WithConfIndex can be used to load config directly
+// from byte and set the interface name's index.
+func WithConfIndex(bytes []byte, index int) CNIOpt {
 	return func(c *libcni) error {
 		conf, err := cnilibrary.ConfFromBytes(bytes)
 		if err != nil {
@@ -98,7 +104,7 @@ func WithConf(bytes []byte) CNIOpt {
 		c.networks = append(c.networks, &Network{
 			cni:    c.cniConfig,
 			config: confList,
-			ifName: getIfName(c.prefix, 0),
+			ifName: getIfName(c.prefix, index),
 		})
 		return nil
 	}

vendor/github.com/containerd/go-cni/types.go

@@ -43,3 +43,11 @@ type IPRanges struct {
 	RangeEnd   string
 	Gateway    string
 }
+
+// BandWidth defines the ingress/egress rate and burst limits
+type BandWidth struct {
+	IngressRate  uint64
+	IngressBurst uint64
+	EgressRate   uint64
+	EgressBurst  uint64
+}