diff --git a/build/yamls/antrea-eks.yml b/build/yamls/antrea-eks.yml
index e402288763a..6038cf296ab 100644
--- a/build/yamls/antrea-eks.yml
+++ b/build/yamls/antrea-eks.yml
@@ -332,6 +332,9 @@ data:
     # Note that if it's set to another value, the `containerPort` of the `api` port of the
     # `antrea-agent` container must be set to the same value.
     #apiPort: 10350
+
+    # Enable metrics exposure via Prometheus. Initializes Prometheus metrics listener
+    #enablePrometheusMetrics: false
   antrea-cni.conflist: |
     {
         "cniVersion":"0.3.0",
@@ -354,12 +357,15 @@ data:
     # Note that if it's set to another value, the `containerPort` of the `api` port of the
     # `antrea-controller` container must be set to the same value.
     #apiPort: 10349
+
+    # Enable metrics exposure via Prometheus. Initializes Prometheus metrics listener.
+    #enablePrometheusMetrics: false
 kind: ConfigMap
 metadata:
   annotations: {}
   labels:
     app: antrea
-  name: antrea-config-t4m46b8f6h
+  name: antrea-config-td846cf4bm
   namespace: kube-system
 ---
 apiVersion: v1
@@ -459,7 +465,7 @@ spec:
         key: node-role.kubernetes.io/master
       volumes:
       - configMap:
-          name: antrea-config-t4m46b8f6h
+          name: antrea-config-td846cf4bm
         name: antrea-config
       - hostPath:
           path: /var/log/antrea
@@ -555,7 +561,6 @@ spec:
         name: antrea-agent
         ports:
         - containerPort: 10350
-          hostPort: 10350
           name: api
           protocol: TCP
         readinessProbe:
@@ -658,7 +663,7 @@ spec:
         operator: Exists
       volumes:
       - configMap:
-          name: antrea-config-t4m46b8f6h
+          name: antrea-config-td846cf4bm
         name: antrea-config
       - hostPath:
           path: /etc/cni/net.d
diff --git a/build/yamls/antrea-gke.yml b/build/yamls/antrea-gke.yml
index ce07e6cab03..3e274d0e9da 100644
--- a/build/yamls/antrea-gke.yml
+++ b/build/yamls/antrea-gke.yml
@@ -332,6 +332,9 @@ data:
     # Note that if it's set to another value, the `containerPort` of the `api` port of the
     # `antrea-agent` container must be set to the same value.
     #apiPort: 10350
+
+    # Enable metrics exposure via Prometheus. Initializes Prometheus metrics listener
+    #enablePrometheusMetrics: false
   antrea-cni.conflist: |
     {
         "cniVersion":"0.3.0",
@@ -354,12 +357,15 @@ data:
     # Note that if it's set to another value, the `containerPort` of the `api` port of the
     # `antrea-controller` container must be set to the same value.
     #apiPort: 10349
+
+    # Enable metrics exposure via Prometheus. Initializes Prometheus metrics listener.
+    #enablePrometheusMetrics: false
 kind: ConfigMap
 metadata:
   annotations: {}
   labels:
     app: antrea
-  name: antrea-config-5754dg84hf
+  name: antrea-config-h45gtb8dbg
   namespace: kube-system
 ---
 apiVersion: v1
@@ -459,7 +465,7 @@ spec:
         key: node-role.kubernetes.io/master
       volumes:
       - configMap:
-          name: antrea-config-5754dg84hf
+          name: antrea-config-h45gtb8dbg
         name: antrea-config
       - hostPath:
           path: /var/log/antrea
@@ -555,7 +561,6 @@ spec:
         name: antrea-agent
         ports:
         - containerPort: 10350
-          hostPort: 10350
           name: api
           protocol: TCP
         readinessProbe:
@@ -658,7 +663,7 @@ spec:
         operator: Exists
       volumes:
       - configMap:
-          name: antrea-config-5754dg84hf
+          name: antrea-config-h45gtb8dbg
         name: antrea-config
       - hostPath:
           path: /etc/cni/net.d
diff --git a/build/yamls/antrea-ipsec.yml b/build/yamls/antrea-ipsec.yml
index d1f40e234a5..c959e237b4b 100644
--- a/build/yamls/antrea-ipsec.yml
+++ b/build/yamls/antrea-ipsec.yml
@@ -332,6 +332,9 @@ data:
     # Note that if it's set to another value, the `containerPort` of the `api` port of the
     # `antrea-agent` container must be set to the same value.
     #apiPort: 10350
+
+    # Enable metrics exposure via Prometheus. Initializes Prometheus metrics listener
+    #enablePrometheusMetrics: false
   antrea-cni.conflist: |
     {
         "cniVersion":"0.3.0",
@@ -354,12 +357,15 @@ data:
     # Note that if it's set to another value, the `containerPort` of the `api` port of the
     # `antrea-controller` container must be set to the same value.
     #apiPort: 10349
+
+    # Enable metrics exposure via Prometheus. Initializes Prometheus metrics listener.
+    #enablePrometheusMetrics: false
 kind: ConfigMap
 metadata:
   annotations: {}
   labels:
     app: antrea
-  name: antrea-config-c7579447k2
+  name: antrea-config-d7m57h87ck
   namespace: kube-system
 ---
 apiVersion: v1
@@ -468,7 +474,7 @@ spec:
         key: node-role.kubernetes.io/master
       volumes:
       - configMap:
-          name: antrea-config-c7579447k2
+          name: antrea-config-d7m57h87ck
         name: antrea-config
       - hostPath:
           path: /var/log/antrea
@@ -596,7 +602,6 @@ spec:
         name: antrea-agent
         ports:
         - containerPort: 10350
-          hostPort: 10350
           name: api
           protocol: TCP
         readinessProbe:
@@ -699,7 +704,7 @@ spec:
         operator: Exists
       volumes:
       - configMap:
-          name: antrea-config-c7579447k2
+          name: antrea-config-d7m57h87ck
         name: antrea-config
       - hostPath:
           path: /etc/cni/net.d
diff --git a/build/yamls/antrea.yml b/build/yamls/antrea.yml
index 5b025c5b0e4..d9926c57ed2 100644
--- a/build/yamls/antrea.yml
+++ b/build/yamls/antrea.yml
@@ -332,6 +332,9 @@ data:
     # Note that if it's set to another value, the `containerPort` of the `api` port of the
     # `antrea-agent` container must be set to the same value.
     #apiPort: 10350
+
+    # Enable metrics exposure via Prometheus. Initializes Prometheus metrics listener
+    #enablePrometheusMetrics: false
   antrea-cni.conflist: |
     {
         "cniVersion":"0.3.0",
@@ -354,12 +357,15 @@ data:
     # Note that if it's set to another value, the `containerPort` of the `api` port of the
     # `antrea-controller` container must be set to the same value.
     #apiPort: 10349
+
+    # Enable metrics exposure via Prometheus. Initializes Prometheus metrics listener.
+    #enablePrometheusMetrics: false
 kind: ConfigMap
 metadata:
   annotations: {}
   labels:
     app: antrea
-  name: antrea-config-428d4tg64g
+  name: antrea-config-f95kf94mk9
   namespace: kube-system
 ---
 apiVersion: v1
@@ -459,7 +465,7 @@ spec:
         key: node-role.kubernetes.io/master
       volumes:
       - configMap:
-          name: antrea-config-428d4tg64g
+          name: antrea-config-f95kf94mk9
         name: antrea-config
       - hostPath:
           path: /var/log/antrea
@@ -555,7 +561,6 @@ spec:
         name: antrea-agent
         ports:
         - containerPort: 10350
-          hostPort: 10350
           name: api
           protocol: TCP
         readinessProbe:
@@ -658,7 +663,7 @@ spec:
         operator: Exists
       volumes:
       - configMap:
-          name: antrea-config-428d4tg64g
+          name: antrea-config-f95kf94mk9
         name: antrea-config
       - hostPath:
           path: /etc/cni/net.d
diff --git a/build/yamls/base/agent.yml b/build/yamls/base/agent.yml
index e801f5dca26..4efe36fe2c4 100644
--- a/build/yamls/base/agent.yml
+++ b/build/yamls/base/agent.yml
@@ -77,7 +77,6 @@ spec:
                   fieldPath: spec.nodeName
           ports:
             - containerPort: 10350
-              hostPort: 10350
               name: api
               protocol: TCP
           livenessProbe:
diff --git a/build/yamls/base/conf/antrea-agent.conf b/build/yamls/base/conf/antrea-agent.conf
index 108596bbf02..8d4e53eae09 100644
--- a/build/yamls/base/conf/antrea-agent.conf
+++ b/build/yamls/base/conf/antrea-agent.conf
@@ -46,3 +46,6 @@
 # Note that if it's set to another value, the `containerPort` of the `api` port of the
 # `antrea-agent` container must be set to the same value.
 #apiPort: 10350
+
+# Enable metrics exposure via Prometheus. Initializes Prometheus metrics listener
+#enablePrometheusMetrics: false
diff --git a/build/yamls/base/conf/antrea-controller.conf b/build/yamls/base/conf/antrea-controller.conf
index 3823f0723c3..d6dda5bbccd 100644
--- a/build/yamls/base/conf/antrea-controller.conf
+++ b/build/yamls/base/conf/antrea-controller.conf
@@ -2,3 +2,6 @@
 # Note that if it's set to another value, the `containerPort` of the `api` port of the
 # `antrea-controller` container must be set to the same value.
 #apiPort: 10349
+
+# Enable metrics exposure via Prometheus. Initializes Prometheus metrics listener.
+#enablePrometheusMetrics: false
diff --git a/cmd/antrea-agent/agent.go b/cmd/antrea-agent/agent.go
index 685bd388afe..cfef57e51aa 100644
--- a/cmd/antrea-agent/agent.go
+++ b/cmd/antrea-agent/agent.go
@@ -30,6 +30,7 @@ import (
 	"github.com/vmware-tanzu/antrea/pkg/agent/controller/networkpolicy"
 	"github.com/vmware-tanzu/antrea/pkg/agent/controller/noderoute"
 	"github.com/vmware-tanzu/antrea/pkg/agent/interfacestore"
+	"github.com/vmware-tanzu/antrea/pkg/agent/metrics"
 	"github.com/vmware-tanzu/antrea/pkg/agent/openflow"
 	"github.com/vmware-tanzu/antrea/pkg/agent/querier"
 	"github.com/vmware-tanzu/antrea/pkg/agent/route"
@@ -161,11 +162,19 @@ func run(o *Options) error {
 		ovsBridgeClient,
 		networkPolicyController)
 
+	if o.config.EnablePrometheusMetrics {
+		metrics.InitializePrometheusMetrics(o.config.OVSBridge, ifaceStore, ofClient)
+	}
+
 	agentMonitor := monitor.NewAgentMonitor(crdClient, agentQuerier)
 
 	go agentMonitor.Run(stopCh)
 
-	apiServer, err := apiserver.New(agentQuerier, networkPolicyController, o.config.APIPort)
+	apiServer, err := apiserver.New(
+		agentQuerier,
+		networkPolicyController,
+		o.config.APIPort,
+		o.config.EnablePrometheusMetrics)
 	if err != nil {
 		return fmt.Errorf("error when creating agent API server: %v", err)
 	}
diff --git a/cmd/antrea-agent/config.go b/cmd/antrea-agent/config.go
index 4dfaace5109..25de498b6cd 100644
--- a/cmd/antrea-agent/config.go
+++ b/cmd/antrea-agent/config.go
@@ -75,4 +75,7 @@ type AgentConfig struct {
 	// APIPort is the port for the antrea-agent APIServer to serve on.
 	// Defaults to 10350.
 	APIPort int `yaml:"apiPort,omitempty"`
+	// Enable metrics exposure via Prometheus. Initializes Prometheus metrics listener
+	// Defaults to false.
+	EnablePrometheusMetrics bool `yaml:"enablePrometheusMetrics,omitempty"`
 }
diff --git a/cmd/antrea-controller/config.go b/cmd/antrea-controller/config.go
index cca42592507..1c52730be92 100644
--- a/cmd/antrea-controller/config.go
+++ b/cmd/antrea-controller/config.go
@@ -25,4 +25,7 @@ type ControllerConfig struct {
 	// APIPort is the port for the antrea-controller APIServer to serve on.
 	// Defaults to 10349.
 	APIPort int `yaml:"apiPort,omitempty"`
+	// Enable metrics exposure via Prometheus. Initializes Prometheus metrics listener
+	// Defaults to false.
+	EnablePrometheusMetrics bool `yaml:"enablePrometheusMetrics,omitempty"`
 }
diff --git a/cmd/antrea-controller/controller.go b/cmd/antrea-controller/controller.go
index f01aa7c2d25..4a32014a578 100644
--- a/cmd/antrea-controller/controller.go
+++ b/cmd/antrea-controller/controller.go
@@ -28,6 +28,7 @@ import (
 	"github.com/vmware-tanzu/antrea/pkg/apiserver"
 	"github.com/vmware-tanzu/antrea/pkg/apiserver/openapi"
 	"github.com/vmware-tanzu/antrea/pkg/apiserver/storage"
+	"github.com/vmware-tanzu/antrea/pkg/controller/metrics"
 	"github.com/vmware-tanzu/antrea/pkg/controller/networkpolicy"
 	"github.com/vmware-tanzu/antrea/pkg/controller/networkpolicy/store"
 	"github.com/vmware-tanzu/antrea/pkg/controller/querier"
@@ -78,7 +79,8 @@ func run(o *Options) error {
 		addressGroupStore,
 		appliedToGroupStore,
 		networkPolicyStore,
-		controllerQuerier)
+		controllerQuerier,
+		o.config.EnablePrometheusMetrics)
 	if err != nil {
 		return fmt.Errorf("error creating API server config: %v", err)
 	}
@@ -100,6 +102,10 @@ func run(o *Options) error {
 
 	go apiServer.GenericAPIServer.PrepareRun().Run(stopCh)
 
+	if o.config.EnablePrometheusMetrics {
+		metrics.InitializePrometheusMetrics()
+	}
+
 	<-stopCh
 	klog.Info("Stopping Antrea controller")
 	return nil
@@ -110,7 +116,8 @@ func createAPIServerConfig(kubeconfig string,
 	addressGroupStore storage.Interface,
 	appliedToGroupStore storage.Interface,
 	networkPolicyStore storage.Interface,
-	controllerQuerier querier.ControllerQuerier) (*apiserver.Config, error) {
+	controllerQuerier querier.ControllerQuerier,
+	enableMetrics bool) (*apiserver.Config, error) {
 	// TODO:
 	// 1. Support user-provided certificate.
 	secureServing := genericoptions.NewSecureServingOptions().WithLoopback()
@@ -146,6 +153,7 @@ func createAPIServerConfig(kubeconfig string,
 		openapi.GetOpenAPIDefinitions,
 		genericopenapi.NewDefinitionNamer(apiserver.Scheme))
 	serverConfig.OpenAPIConfig.Info.Title = "Antrea"
+	serverConfig.EnableMetrics = enableMetrics
 
 	return apiserver.NewConfig(
 		serverConfig,
diff --git a/go.mod b/go.mod
index 331be93ba33..0c62dc187b3 100644
--- a/go.mod
+++ b/go.mod
@@ -25,6 +25,7 @@ require (
 	github.com/imdario/mergo v0.3.7 // indirect
 	github.com/j-keck/arping v1.0.0
 	github.com/kevinburke/ssh_config v0.0.0-20190725054713-01f96b0aa0cd
+	github.com/prometheus/client_golang v0.9.3-0.20190127221311-3c4408c8b829
 	github.com/satori/go.uuid v1.2.0
 	github.com/sirupsen/logrus v1.4.1
 	github.com/spf13/cobra v0.0.5
diff --git a/pkg/agent/agent.go b/pkg/agent/agent.go
index 54454608358..9d56fc0813f 100644
--- a/pkg/agent/agent.go
+++ b/pkg/agent/agent.go
@@ -37,12 +37,11 @@ import (
 	"github.com/vmware-tanzu/antrea/pkg/agent/types"
 	"github.com/vmware-tanzu/antrea/pkg/agent/util"
 	"github.com/vmware-tanzu/antrea/pkg/ovs/ovsconfig"
+	"github.com/vmware-tanzu/antrea/pkg/util/env"
 )
 
 const (
 	maxRetryForHostLink = 5
-	// nodeNameEnvKey is environment variable.
-	nodeNameEnvKey = "NODE_NAME"
 	// ipsecPSKEnvKey is environment variable.
 	ipsecPSKEnvKey          = "ANTREA_IPSEC_PSK"
 	roundNumKey             = "roundNum" // round number key in externalIDs.
@@ -436,7 +435,7 @@ func (i *Initializer) setupDefaultTunnelInterface(tunnelPortName string) error {
 // initNodeLocalConfig retrieves node's subnet CIDR from node.spec.PodCIDR, which is used for IPAM and setup
 // host gateway interface.
 func (i *Initializer) initNodeLocalConfig() error {
-	nodeName, err := getNodeName()
+	nodeName, err := env.GetNodeName()
 	if err != nil {
 		return err
 	}
@@ -476,24 +475,6 @@ func (i *Initializer) initNodeLocalConfig() error {
 	return nil
 }
 
-// getNodeName returns the node's name used in Kubernetes, based on the priority:
-// - Environment variable NODE_NAME, which should be set by Downward API
-// - OS's hostname
-func getNodeName() (string, error) {
-	nodeName := os.Getenv(nodeNameEnvKey)
-	if nodeName != "" {
-		return nodeName, nil
-	}
-	klog.Infof("Environment variable %s not found, using hostname instead", nodeNameEnvKey)
-	var err error
-	nodeName, err = os.Hostname()
-	if err != nil {
-		klog.Errorf("Failed to get local hostname: %v", err)
-		return "", err
-	}
-	return nodeName, nil
-}
-
 // readIPSecPSK reads the IPSec PSK value from environment variable
 // ANTREA_IPSEC_PSK, when enableIPSecTunnel is set to true.
 func (i *Initializer) readIPSecPSK() error {
diff --git a/pkg/agent/agent_test.go b/pkg/agent/agent_test.go
index 33930ad4641..f7fbaff4448 100644
--- a/pkg/agent/agent_test.go
+++ b/pkg/agent/agent_test.go
@@ -17,7 +17,6 @@ package agent
 import (
 	"fmt"
 	"net"
-	"os"
 	"testing"
 
 	mock "github.com/golang/mock/gomock"
@@ -30,38 +29,6 @@ import (
 	ovsconfigtest "github.com/vmware-tanzu/antrea/pkg/ovs/ovsconfig/testing"
 )
 
-func TestGetNodeName(t *testing.T) {
-	hostName, err := os.Hostname()
-	if err != nil {
-		t.Fatalf("Failed to retrieve hostname, %v", err)
-	}
-	testTable := map[string]string{
-		"node1":     "node1",
-		"node_12":   "node_12",
-		"":          hostName,
-		"node-1234": "node-1234",
-	}
-
-	for k, v := range testTable {
-		compareNodeName(k, v, t)
-	}
-}
-
-func compareNodeName(k, v string, t *testing.T) {
-	if k != "" {
-		_ = os.Setenv(nodeNameEnvKey, k)
-		defer os.Unsetenv(nodeNameEnvKey)
-	}
-	nodeName, err := getNodeName()
-	if err != nil {
-		t.Errorf("Failure with expected name %s, %v", k, err)
-		return
-	}
-	if nodeName != v {
-		t.Errorf("Failed to retrieve nodename, want: %s, get: %s", v, nodeName)
-	}
-}
-
 func newAgentInitializer(ovsBridgeClient ovsconfig.OVSBridgeClient, ifaceStore interfacestore.InterfaceStore) *Initializer {
 	return &Initializer{ovsBridgeClient: ovsBridgeClient, ifaceStore: ifaceStore, hostGateway: "gw0"}
 }
diff --git a/pkg/agent/apiserver/apiserver.go b/pkg/agent/apiserver/apiserver.go
index 425d932c00e..f8514559894 100644
--- a/pkg/agent/apiserver/apiserver.go
+++ b/pkg/agent/apiserver/apiserver.go
@@ -62,8 +62,9 @@ func installHandlers(aq agentquerier.AgentQuerier, npq querier.AgentNetworkPolic
 }
 
 // New creates an APIServer for running in antrea agent.
-func New(aq agentquerier.AgentQuerier, npq querier.AgentNetworkPolicyInfoQuerier, bindPort int) (*agentAPIServer, error) {
-	cfg, err := newConfig(bindPort)
+func New(aq agentquerier.AgentQuerier, npq querier.AgentNetworkPolicyInfoQuerier, bindPort int,
+	enableMetrics bool) (*agentAPIServer, error) {
+	cfg, err := newConfig(bindPort, enableMetrics)
 	if err != nil {
 		return nil, err
 	}
@@ -75,7 +76,7 @@ func New(aq agentquerier.AgentQuerier, npq querier.AgentNetworkPolicyInfoQuerier
 	return &agentAPIServer{GenericAPIServer: s}, nil
 }
 
-func newConfig(bindPort int) (*genericapiserver.CompletedConfig, error) {
+func newConfig(bindPort int, enableMetrics bool) (*genericapiserver.CompletedConfig, error) {
 	secureServing := genericoptions.NewSecureServingOptions().WithLoopback()
 	authentication := genericoptions.NewDelegatingAuthenticationOptions()
 	authorization := genericoptions.NewDelegatingAuthorizationOptions()
@@ -106,6 +107,7 @@ func newConfig(bindPort int) (*genericapiserver.CompletedConfig, error) {
 		GitTreeState: antreaversion.GitTreeState,
 		GitCommit:    antreaversion.GetGitSHA(),
 	}
+	serverConfig.EnableMetrics = enableMetrics
 
 	completedServerCfg := serverConfig.Complete(nil)
 	return &completedServerCfg, nil
diff --git a/pkg/agent/metrics/prometheus.go b/pkg/agent/metrics/prometheus.go
new file mode 100644
index 00000000000..e537efdf765
--- /dev/null
+++ b/pkg/agent/metrics/prometheus.go
@@ -0,0 +1,103 @@
+// Copyright 2020 Antrea Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package metrics
+
+import (
+	"strconv"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"k8s.io/klog"
+
+	"github.com/vmware-tanzu/antrea/pkg/agent/interfacestore"
+	"github.com/vmware-tanzu/antrea/pkg/agent/openflow"
+	"github.com/vmware-tanzu/antrea/pkg/util/env"
+)
+
+type ovsStatManager struct {
+	ofClient     openflow.Client
+	ovsBridge    string
+	ovsTableDesc *prometheus.Desc
+}
+
+func (c *ovsStatManager) getOVSStatistics() (ovsFlowsByTable map[string]float64) {
+	ovsFlowsByTable = make(map[string]float64)
+	flowTableStatus := c.ofClient.GetFlowTableStatus()
+	for _, tableStatus := range flowTableStatus {
+		ovsFlowsByTable[strconv.Itoa(int(tableStatus.ID))] = float64(tableStatus.FlowCount)
+	}
+	return
+}
+
+func (c *ovsStatManager) Describe(ch chan<- *prometheus.Desc) {
+	ch <- c.ovsTableDesc
+}
+
+func (c *ovsStatManager) Collect(ch chan<- prometheus.Metric) {
+	ovsFlowsByTable := c.getOVSStatistics()
+	for tableId, tableFlowCount := range ovsFlowsByTable {
+		ch <- prometheus.MustNewConstMetric(
+			c.ovsTableDesc,
+			prometheus.GaugeValue,
+			tableFlowCount,
+			tableId,
+		)
+	}
+}
+
+func newOVSStatManager(ovsBridge string, ofClient openflow.Client) *ovsStatManager {
+	return &ovsStatManager{
+		ofClient:  ofClient,
+		ovsBridge: ovsBridge,
+		ovsTableDesc: prometheus.NewDesc(
+			"antrea_agent_ovs_flow_table",
+			"OVS flow table flow count.",
+			[]string{"table_id"},
+			prometheus.Labels{"bridge": ovsBridge},
+		),
+	}
+}
+
+func InitializePrometheusMetrics(
+	ovsBridge string,
+	ifaceStore interfacestore.InterfaceStore,
+	ofClient openflow.Client) {
+
+	klog.Info("Initializing prometheus metrics")
+	if err := prometheus.Register(prometheus.NewGaugeFunc(
+		prometheus.GaugeOpts{
+			Name: "antrea_agent_local_pod_count",
+			Help: "Number of pods on local node which are managed by the Antrea Agent.",
+		},
+		func() float64 { return float64(ifaceStore.GetContainerInterfaceNum()) },
+	)); err != nil {
+		klog.Error("Failed to register antrea_agent_local_pod_count with Prometheus")
+	}
+
+	nodeName, err := env.GetNodeName()
+	if err != nil {
+		klog.Errorf("Failed to retrieve agent K8S node name: %v", err)
+	}
+
+	gaugeHost := prometheus.NewGauge(prometheus.GaugeOpts{
+		Name:        "antrea_agent_runtime_info",
+		Help:        "Antrea agent runtime info , defined as a labels. The value of the gauge is always set to 1.",
+		ConstLabels: prometheus.Labels{"k8s_nodename": nodeName, "k8s_podname": env.GetPodName()},
+	})
+	gaugeHost.Set(1)
+	prometheus.MustRegister(gaugeHost)
+
+	ovsStats := newOVSStatManager(ovsBridge, ofClient)
+	prometheus.MustRegister(ovsStats)
+}
diff --git a/pkg/controller/metrics/prometheus.go b/pkg/controller/metrics/prometheus.go
new file mode 100644
index 00000000000..b185c270750
--- /dev/null
+++ b/pkg/controller/metrics/prometheus.go
@@ -0,0 +1,39 @@
+// Copyright 2020 Antrea Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package metrics
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+	"k8s.io/klog"
+
+	"github.com/vmware-tanzu/antrea/pkg/util/env"
+)
+
+// Initialize Prometheus metrics collection.
+func InitializePrometheusMetrics() {
+	nodeName, err := env.GetNodeName()
+	if err != nil {
+		klog.Errorf("Failed to retrieve controller K8S node name: %v", err)
+	}
+
+	klog.Info("Initializing prometheus metrics")
+	gaugeHost := prometheus.NewGauge(prometheus.GaugeOpts{
+		Name:        "antrea_controller_runtime_info",
+		Help:        "Antrea controller runtime info, defined as a labels. The value of the gauge is always set to 1.",
+		ConstLabels: prometheus.Labels{"k8s_nodename": nodeName, "k8s_podname": env.GetPodName()},
+	})
+	gaugeHost.Set(1)
+	prometheus.MustRegister(gaugeHost)
+}
diff --git a/pkg/util/env/env.go b/pkg/util/env/env.go
new file mode 100644
index 00000000000..b036979c0cb
--- /dev/null
+++ b/pkg/util/env/env.go
@@ -0,0 +1,54 @@
+// Copyright 2020 Antrea Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package env
+
+import (
+	"os"
+
+	"k8s.io/klog"
+)
+
+// nodeNameEnvKey is environment variable.
+const (
+	nodeNameEnvKey = "NODE_NAME"
+	podNameEnvKey  = "POD_NAME"
+)
+
+// GetNodeName returns the node's name used in Kubernetes, based on the priority:
+// - Environment variable NODE_NAME, which should be set by Downward API
+// - OS's hostname
+func GetNodeName() (string, error) {
+	nodeName := os.Getenv(nodeNameEnvKey)
+	if nodeName != "" {
+		return nodeName, nil
+	}
+	klog.Infof("Environment variable %s not found, using hostname instead", nodeNameEnvKey)
+	var err error
+	nodeName, err = os.Hostname()
+	if err != nil {
+		klog.Errorf("Failed to get local hostname: %v", err)
+		return "", err
+	}
+	return nodeName, nil
+}
+
+// GetPodName returns the pod name where the code executes
+func GetPodName() string {
+	podName := os.Getenv(podNameEnvKey)
+	if podName == "" {
+		klog.Warningf("Environment variable %s not found", podNameEnvKey)
+	}
+	return podName
+}
diff --git a/pkg/util/env/env_test.go b/pkg/util/env/env_test.go
new file mode 100644
index 00000000000..8e76eab83ff
--- /dev/null
+++ b/pkg/util/env/env_test.go
@@ -0,0 +1,76 @@
+// Copyright 2020 Antrea Authors
+
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package env
+
+import (
+	"os"
+	"testing"
+)
+
+func TestGetNodeName(t *testing.T) {
+	hostName, err := os.Hostname()
+	if err != nil {
+		t.Fatalf("Failed to retrieve hostname: %v", err)
+	}
+	testTable := map[string]string{
+		"node1":     "node1",
+		"node_12":   "node_12",
+		"":          hostName,
+		"node-1234": "node-1234",
+	}
+
+	for k, v := range testTable {
+		compareNodeName(k, v, t)
+	}
+}
+
+func compareNodeName(k, v string, t *testing.T) {
+	if k != "" {
+		_ = os.Setenv(nodeNameEnvKey, k)
+		defer os.Unsetenv(nodeNameEnvKey)
+	}
+	nodeName, err := GetNodeName()
+	if err != nil {
+		t.Errorf("Failure with expected name %s: %v", k, err)
+		return
+	}
+	if nodeName != v {
+		t.Errorf("Failed to retrieve nodename, want: %s, get: %s", v, nodeName)
+	}
+}
+
+func TestGetPodName(t *testing.T) {
+	testTable := map[string]string{
+		"pod1":                               "pod1",
+		"pod-1212-x":                         "pod-1212-x",
+		"antrea-controller-577f4ffb4b-njprt": "antrea-controller-577f4ffb4b-njprt",
+	}
+
+	for k, v := range testTable {
+		comparePodName(k, v, t)
+	}
+}
+
+func comparePodName(k, v string, t *testing.T) {
+	if k != "" {
+		_ = os.Setenv(podNameEnvKey, k)
+		defer os.Unsetenv(podNameEnvKey)
+	}
+	podName := GetPodName()
+	if podName != v {
+		t.Errorf("Failed to retrieve pod name, want: %s, get: %s", v, podName)
+	}
+}