Update topology to include tag

Tag can be used to specify the sub-shape for the given node.

Signed-off-by: Akash Srivastava <akash.srivastava@openebs.io>

render/detailed/node_test.go

@@ -48,6 +48,7 @@ func TestMakeDetailedHostNode(t *testing.T) {
 				Rank:       "hostname.com",
 				Pseudo:     false,
 				Shape:      "circle",
+				Tag:        "",
 			},
 			Adjacency: report.MakeIDList(fixture.ServerHostNodeID),
 			Metadata: []report.MetadataRow{
@@ -192,6 +193,7 @@ func TestMakeDetailedContainerNode(t *testing.T) {
 				LabelMinor: "server.hostname.com",
 				Rank:       fixture.ServerContainerImageName,
 				Shape:      "hexagon",
+				Tag:        "",
 				Pseudo:     false,
 			},
 			Metadata: []report.MetadataRow{
@@ -321,6 +323,7 @@ func TestMakeDetailedPodNode(t *testing.T) {
 				LabelMinor: "1 container",
 				Rank:       "ping/pong-b",
 				Shape:      "heptagon",
+				Tag:        "",
 				Pseudo:     false,
 			},
 			Metadata: []report.MetadataRow{

render/detailed/summary.go

@@ -49,6 +49,7 @@ type BasicNodeSummary struct {
 	LabelMinor string `json:"labelMinor"`
 	Rank       string `json:"rank"`
 	Shape      string `json:"shape,omitempty"`
+	Tag        string `json:"tag,omitempty"`
 	Stack      bool   `json:"stack,omitempty"`
 	Pseudo     bool   `json:"pseudo,omitempty"`
 }
@@ -115,6 +116,7 @@ func MakeBasicNodeSummary(r report.Report, n report.Node) (BasicNodeSummary, boo
 	}
 	if t, ok := r.Topology(n.Topology); ok {
 		summary.Shape = t.GetShape()
+		summary.Tag = t.Tag
 	}
 
 	// Do we have a renderer for the topology?
@@ -399,6 +401,7 @@ func groupNodeSummary(base BasicNodeSummary, r report.Report, n report.Node) Bas
 	if topology, _, ok := render.ParseGroupNodeTopology(n.Topology); ok {
 		if t, ok := r.Topology(topology); ok {
 			base.Shape = t.GetShape()
+			base.Tag = t.Tag
 			if t.Label != "" {
 				base.LabelMinor = pluralize(n.Counters, topology, t.Label, t.LabelPlural)
 			}

render/detailed/summary_test.go

@@ -110,6 +110,7 @@ func TestMakeNodeSummary(t *testing.T) {
 					LabelMinor: "client.hostname.com (10001)",
 					Rank:       fixture.Client1Name,
 					Shape:      "square",
+					Tag:        "",
 				},
 				Metadata: []report.MetadataRow{
 					{ID: process.PID, Label: "PID", Value: fixture.Client1PID, Priority: 1, Datatype: report.Number},
@@ -128,6 +129,7 @@ func TestMakeNodeSummary(t *testing.T) {
 					LabelMinor: fixture.ClientHostName,
 					Rank:       fixture.ClientContainerImageName,
 					Shape:      "hexagon",
+					Tag:        "",
 				},
 				Metadata: []report.MetadataRow{
 					{ID: docker.ImageName, Label: "Image name", Value: fixture.ClientContainerImageName, Priority: 2},
@@ -147,6 +149,7 @@ func TestMakeNodeSummary(t *testing.T) {
 					LabelMinor: "1 container",
 					Rank:       fixture.ClientContainerImageName,
 					Shape:      "hexagon",
+					Tag:        "",
 					Stack:      true,
 				},
 				Metadata: []report.MetadataRow{
@@ -166,6 +169,7 @@ func TestMakeNodeSummary(t *testing.T) {
 					LabelMinor: "hostname.com",
 					Rank:       "hostname.com",
 					Shape:      "circle",
+					Tag:        "",
 				},
 				Metadata: []report.MetadataRow{
 					{ID: host.HostName, Label: "Hostname", Value: fixture.ClientHostName, Priority: 11},
@@ -184,6 +188,7 @@ func TestMakeNodeSummary(t *testing.T) {
 					LabelMinor: "1 process",
 					Rank:       "apache",
 					Shape:      "square",
+					Tag:        "",
 					Stack:      true,
 				},
 			},