Displays Consul version of each nodes in UI nodes section

.changelog/17754.txt

@@ -0,0 +1,3 @@
+```release-note:feature
+ui: Display the Consul agent version in the nodes list, and allow filtering and sorting of nodes based on versions.
+```

agent/agent.go

@@ -3999,6 +3999,7 @@ func (a *Agent) loadMetadata(conf *config.RuntimeConfig) error {
 		meta[k] = v
 	}
 	meta[structs.MetaSegmentKey] = conf.SegmentName
+	meta[structs.MetaConsulVersion] = conf.Version
 	return a.State.LoadMetadata(meta)
 }
 

agent/agent_endpoint_test.go

@@ -1506,7 +1506,8 @@ func TestAgent_Self(t *testing.T) {
 			require.NoError(t, err)
 			require.Equal(t, cs[a.config.SegmentName], val.Coord)
 
-			delete(val.Meta, structs.MetaSegmentKey) // Added later, not in config.
+			delete(val.Meta, structs.MetaSegmentKey)    // Added later, not in config.
+			delete(val.Meta, structs.MetaConsulVersion) // Added later, not in config.
 			require.Equal(t, a.config.NodeMeta, val.Meta)
 
 			if tc.expectXDS {

agent/consul/leader.go

@@ -1087,6 +1087,13 @@ AFTER_CHECK:
 		"partition", getSerfMemberEnterpriseMeta(member).PartitionOrDefault(),
 	)
 
+	// Get consul version from serf member
+	// add this as node meta in catalog register request
+	buildVersion, err := metadata.Build(&member)
+	if err != nil {
+		return err
+	}
+
 	// Register with the catalog.
 	req := structs.RegisterRequest{
 		Datacenter: s.config.Datacenter,
@@ -1102,6 +1109,9 @@ AFTER_CHECK:
 			Output:  structs.SerfCheckAliveOutput,
 		},
 		EnterpriseMeta: *nodeEntMeta,
+		NodeMeta: map[string]string{
+			structs.MetaConsulVersion: buildVersion.String(),
+		},
 	}
 	if node != nil {
 		req.TaggedAddresses = node.TaggedAddresses

agent/consul/state/catalog.go

@@ -3450,6 +3450,13 @@ func parseNodes(tx ReadTxn, ws memdb.WatchSet, idx uint64,
 		ws.AddWithLimit(watchLimit, services.WatchCh(), allServicesCh)
 		for service := services.Next(); service != nil; service = services.Next() {
 			ns := service.(*structs.ServiceNode).ToNodeService()
+			//Update Node Meta with version from Consul Service, if already not exists in Node Meta
+			if _, ok := dump.Meta[structs.MetaConsulVersion]; !ok && ns.ID == "consul" && ns.Meta["version"] != "" {
+				if dump.Meta == nil {
+					dump.Meta = make(map[string]string)
+				}
+				dump.Meta[structs.MetaConsulVersion] = ns.Meta["version"]
+			}
 			dump.Services = append(dump.Services, ns)
 		}
 

agent/consul/state/catalog_test.go

@@ -4837,6 +4837,9 @@ func TestStateStore_NodeInfo_NodeDump(t *testing.T) {
 	}
 
 	// Register some nodes
+	// node1 is registered withOut any nodemeta, and a consul service with id
+	// 'consul' is added later with meta 'version'. The expected node must have
+	// meta 'consul-version' with same value
 	testRegisterNode(t, s, 0, "node1")
 	testRegisterNode(t, s, 1, "node2")
 
@@ -4845,6 +4848,8 @@ func TestStateStore_NodeInfo_NodeDump(t *testing.T) {
 	testRegisterService(t, s, 3, "node1", "service2")
 	testRegisterService(t, s, 4, "node2", "service1")
 	testRegisterService(t, s, 5, "node2", "service2")
+	// Register consul service with meta 'version' for node1
+	testRegisterServiceWithMeta(t, s, 10, "node1", "consul", map[string]string{"version": "1.17.0"})
 
 	// Register service-level checks
 	testRegisterCheck(t, s, 6, "node1", "service1", "check1", api.HealthPassing)
@@ -4894,6 +4899,19 @@ func TestStateStore_NodeInfo_NodeDump(t *testing.T) {
 				},
 			},
 			Services: []*structs.NodeService{
+				{
+					ID:      "consul",
+					Service: "consul",
+					Address: "1.1.1.1",
+					Meta:    map[string]string{"version": "1.17.0"},
+					Port:    1111,
+					Weights: &structs.Weights{Passing: 1, Warning: 1},
+					RaftIndex: structs.RaftIndex{
+						CreateIndex: 10,
+						ModifyIndex: 10,
+					},
+					EnterpriseMeta: *structs.DefaultEnterpriseMetaInDefaultPartition(),
+				},
 				{
 					ID:      "service1",
 					Service: "service1",
@@ -4921,6 +4939,7 @@ func TestStateStore_NodeInfo_NodeDump(t *testing.T) {
 					EnterpriseMeta: *structs.DefaultEnterpriseMetaInDefaultPartition(),
 				},
 			},
+			Meta: map[string]string{"consul-version": "1.17.0"},
 		},
 		&structs.NodeInfo{
 			Node:      "node2",
@@ -4988,7 +5007,7 @@ func TestStateStore_NodeInfo_NodeDump(t *testing.T) {
 	if err != nil {
 		t.Fatalf("err: %s", err)
 	}
-	if idx != 9 {
+	if idx != 10 {
 		t.Fatalf("bad index: %d", idx)
 	}
 	require.Len(t, dump, 1)
@@ -4999,8 +5018,8 @@ func TestStateStore_NodeInfo_NodeDump(t *testing.T) {
 	if err != nil {
 		t.Fatalf("err: %s", err)
 	}
-	if idx != 9 {
-		t.Fatalf("bad index: %d", 9)
+	if idx != 10 {
+		t.Fatalf("bad index: %d", idx)
 	}
 	if !reflect.DeepEqual(dump, expect) {
 		t.Fatalf("bad: %#v", dump[0].Services[0])

agent/consul/state/state_store_test.go

@@ -189,6 +189,37 @@ func testRegisterServiceWithChangeOpts(t *testing.T, s *Store, idx uint64, nodeI
 	return svc
 }
 
+// testRegisterServiceWithMeta registers service with Meta passed as arg.
+func testRegisterServiceWithMeta(t *testing.T, s *Store, idx uint64, nodeID, serviceID string, meta map[string]string, opts ...func(service *structs.NodeService)) *structs.NodeService {
+	svc := &structs.NodeService{
+		ID:      serviceID,
+		Service: serviceID,
+		Address: "1.1.1.1",
+		Port:    1111,
+		Meta:    meta,
+	}
+	for _, o := range opts {
+		o(svc)
+	}
+
+	if err := s.EnsureService(idx, nodeID, svc); err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	tx := s.db.Txn(false)
+	defer tx.Abort()
+	service, err := tx.First(tableServices, indexID, NodeServiceQuery{Node: nodeID, Service: serviceID, PeerName: svc.PeerName})
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	if result, ok := service.(*structs.ServiceNode); !ok ||
+		result.Node != nodeID ||
+		result.ServiceID != serviceID {
+		t.Fatalf("bad service: %#v", result)
+	}
+	return svc
+}
+
 // testRegisterService register a service with given transaction idx
 // If the service already exists, transaction number might not be increased
 // Use `testRegisterServiceWithChange()` if you want perform a registration that

agent/local/state_test.go

@@ -189,7 +189,8 @@ func TestAgentAntiEntropy_Services(t *testing.T) {
 	id := services.NodeServices.Node.ID
 	addrs := services.NodeServices.Node.TaggedAddresses
 	meta := services.NodeServices.Node.Meta
-	delete(meta, structs.MetaSegmentKey) // Added later, not in config.
+	delete(meta, structs.MetaSegmentKey)    // Added later, not in config.
+	delete(meta, structs.MetaConsulVersion) // Added later, not in config.
 	assert.Equal(t, a.Config.NodeID, id)
 	assert.Equal(t, a.Config.TaggedAddresses, addrs)
 	assert.Equal(t, unNilMap(a.Config.NodeMeta), meta)
@@ -1355,7 +1356,8 @@ func TestAgentAntiEntropy_Checks(t *testing.T) {
 			id := services.NodeServices.Node.ID
 			addrs := services.NodeServices.Node.TaggedAddresses
 			meta := services.NodeServices.Node.Meta
-			delete(meta, structs.MetaSegmentKey) // Added later, not in config.
+			delete(meta, structs.MetaSegmentKey)    // Added later, not in config.
+			delete(meta, structs.MetaConsulVersion) // Added later, not in config.
 			assert.Equal(r, a.Config.NodeID, id)
 			assert.Equal(r, a.Config.TaggedAddresses, addrs)
 			assert.Equal(r, unNilMap(a.Config.NodeMeta), meta)
@@ -2016,7 +2018,8 @@ func TestAgentAntiEntropy_NodeInfo(t *testing.T) {
 	addrs := services.NodeServices.Node.TaggedAddresses
 	meta := services.NodeServices.Node.Meta
 	nodeLocality := services.NodeServices.Node.Locality
-	delete(meta, structs.MetaSegmentKey) // Added later, not in config.
+	delete(meta, structs.MetaSegmentKey)    // Added later, not in config.
+	delete(meta, structs.MetaConsulVersion) // Added later, not in config.
 	require.Equal(t, a.Config.NodeID, id)
 	require.Equal(t, a.Config.TaggedAddresses, addrs)
 	require.Equal(t, a.Config.StructLocality(), nodeLocality)
@@ -2041,7 +2044,8 @@ func TestAgentAntiEntropy_NodeInfo(t *testing.T) {
 		addrs := services.NodeServices.Node.TaggedAddresses
 		meta := services.NodeServices.Node.Meta
 		nodeLocality := services.NodeServices.Node.Locality
-		delete(meta, structs.MetaSegmentKey) // Added later, not in config.
+		delete(meta, structs.MetaSegmentKey)    // Added later, not in config.
+		delete(meta, structs.MetaConsulVersion) // Added later, not in config.
 		require.Equal(t, nodeID, id)
 		require.Equal(t, a.Config.TaggedAddresses, addrs)
 		require.Equal(t, a.Config.StructLocality(), nodeLocality)

agent/structs/structs.go

@@ -220,6 +220,9 @@ const (
 	// WildcardSpecifier is the string which should be used for specifying a wildcard
 	// The exact semantics of the wildcard is left up to the code where its used.
 	WildcardSpecifier = "*"
+
+	// MetaConsulVersion is the node metadata key used to store the node's consul version
+	MetaConsulVersion = "consul-version"
 )
 
 var allowedConsulMetaKeysForMeshGateway = map[string]struct{}{MetaWANFederationKey: {}}

agent/ui_endpoint.go

@@ -13,9 +13,12 @@ import (
 	"strings"
 
 	"github.com/hashicorp/go-hclog"
+	"github.com/hashicorp/serf/serf"
 
 	"github.com/hashicorp/consul/acl"
 	"github.com/hashicorp/consul/agent/config"
+	"github.com/hashicorp/consul/agent/consul"
+	"github.com/hashicorp/consul/agent/metadata"
 	"github.com/hashicorp/consul/agent/structs"
 	"github.com/hashicorp/consul/api"
 	"github.com/hashicorp/consul/logging"
@@ -110,32 +113,104 @@ RPC:
 		return nil, err
 	}
 
+	// Get version info for all serf members into a map of key-address,value-version.
+	// This logic of calling 'AgentMembersMapAddrVer()' and inserting version info in this func
+	// can be discarded in future releases ( may be after 3 or 4 minor releases),
+	// when all the nodes are registered with consul-version in nodemeta.
+	var err error
+	mapAddrVer, err := AgentMembersMapAddrVer(s, req)
+	if err != nil {
+		return nil, err
+	}
+
 	// Use empty list instead of nil
+	// Also check if consul-version exists in Meta, else add it
 	for _, info := range out.Dump {
 		if info.Services == nil {
 			info.Services = make([]*structs.NodeService, 0)
 		}
 		if info.Checks == nil {
 			info.Checks = make([]*structs.HealthCheck, 0)
 		}
+		// Check if Node Meta - 'consul-version' already exists by virtue of adding
+		// 'consul-version' during node registration itself.
+		// If not, get it from mapAddrVer.
+		if _, ok := info.Meta[structs.MetaConsulVersion]; !ok {
+			if _, okver := mapAddrVer[info.Address]; okver {
+				if info.Meta == nil {
+					info.Meta = make(map[string]string)
+				}
+				info.Meta[structs.MetaConsulVersion] = mapAddrVer[info.Address]
+			}
+		}
 	}
 	if out.Dump == nil {
 		out.Dump = make(structs.NodeDump, 0)
 	}
 
 	// Use empty list instead of nil
+	// Also check if consul-version exists in Meta, else add it
 	for _, info := range out.ImportedDump {
 		if info.Services == nil {
 			info.Services = make([]*structs.NodeService, 0)
 		}
 		if info.Checks == nil {
 			info.Checks = make([]*structs.HealthCheck, 0)
 		}
+		// Check if Node Meta - 'consul-version' already exists by virtue of adding
+		// 'consul-version' during node registration itself.
+		// If not, get it from mapAddrVer.
+		if _, ok := info.Meta[structs.MetaConsulVersion]; !ok {
+			if _, okver := mapAddrVer[info.Address]; okver {
+				if info.Meta == nil {
+					info.Meta = make(map[string]string)
+				}
+				info.Meta[structs.MetaConsulVersion] = mapAddrVer[info.Address]
+			}
+		}
 	}
 
 	return append(out.Dump, out.ImportedDump...), nil
 }
 
+// AgentMembersMapAddrVer is used to get version info from  all serf members into a
+// map of key-address,value-version.
+func AgentMembersMapAddrVer(s *HTTPHandlers, req *http.Request) (map[string]string, error) {
+	var members []serf.Member
+
+	//Get WAN Members
+	wanMembers := s.agent.WANMembers()
+
+	//Get LAN Members
+	//Get the request partition and default to that of the agent.
+	entMeta := s.agent.AgentEnterpriseMeta()
+	if err := s.parseEntMetaPartition(req, entMeta); err != nil {
+		return nil, err
+	}
+	filter := consul.LANMemberFilter{
+		Partition: entMeta.PartitionOrDefault(),
+	}
+	filter.AllSegments = true
+	lanMembers, err := s.agent.delegate.LANMembers(filter)
+	if err != nil {
+		return nil, err
+	}
+
+	//aggregate members
+	members = append(wanMembers, lanMembers...)
+
+	//create a map with key as IPv4 address and value as consul-version
+	mapAddrVer := make(map[string]string, len(members))
+	for i := range members {
+		buildVersion, err := metadata.Build(&members[i])
+		if err == nil {
+			mapAddrVer[members[i].Addr.String()] = buildVersion.String()
+		}
+	}
+
+	return mapAddrVer, nil
+}
+
 // UINodeInfo is used to get info on a single node in a given datacenter. We return a
 // NodeInfo which provides overview information for the node
 func (s *HTTPHandlers) UINodeInfo(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
@@ -172,6 +247,16 @@ RPC:
 		return nil, err
 	}
 
+	// Get version info for all serf members into a map of key-address,value-version.
+	// This logic of calling 'AgentMembersMapAddrVer()' and inserting version info in this func
+	// can be discarded in future releases ( may be after 3 or 4 minor releases),
+	// when all the nodes are registered with consul-version in nodemeta.
+	var err error
+	mapAddrVer, err := AgentMembersMapAddrVer(s, req)
+	if err != nil {
+		return nil, err
+	}
+
 	// Return only the first entry
 	if len(out.Dump) > 0 {
 		info := out.Dump[0]
@@ -181,6 +266,17 @@ RPC:
 		if info.Checks == nil {
 			info.Checks = make([]*structs.HealthCheck, 0)
 		}
+		// Check if Node Meta - 'consul-version' already exists by virtue of adding
+		// 'consul-version' during node registration itself.
+		// If not, get it from mapAddrVer.
+		if _, ok := info.Meta[structs.MetaConsulVersion]; !ok {
+			if _, okver := mapAddrVer[info.Address]; okver {
+				if info.Meta == nil {
+					info.Meta = make(map[string]string)
+				}
+				info.Meta[structs.MetaConsulVersion] = mapAddrVer[info.Address]
+			}
+		}
 		return info, nil
 	}
 

agent/ui_endpoint_test.go

@@ -162,6 +162,9 @@ func TestUINodes(t *testing.T) {
 	require.Len(t, nodes[2].Services, 0)
 	require.NotNil(t, nodes[1].Checks)
 	require.Len(t, nodes[2].Services, 0)
+
+	// check for consul-version in node meta
+	require.Equal(t, nodes[0].Meta[structs.MetaConsulVersion], a.Config.Version)
 }
 
 func TestUINodes_Filter(t *testing.T) {
@@ -260,6 +263,9 @@ func TestUINodeInfo(t *testing.T) {
 		node.Checks == nil || len(node.Checks) != 0 {
 		t.Fatalf("bad: %v", node)
 	}
+
+	// check for consul-version in node meta
+	require.Equal(t, node.Meta[structs.MetaConsulVersion], a.Config.Version)
 }
 
 func TestUIServices(t *testing.T) {

api/catalog_test.go

@@ -65,6 +65,7 @@ func TestAPI_CatalogNodes(t *testing.T) {
 			},
 			Meta: map[string]string{
 				"consul-network-segment": "",
+				"consul-version":         s.Config.Version,
 			},
 		}
 		require.Equal(r, want, got)