diff --git a/discovery/moby/docker.go b/discovery/moby/docker.go
index 34eea7d4c..3a5a11e7b 100644
--- a/discovery/moby/docker.go
+++ b/discovery/moby/docker.go
@@ -54,6 +54,7 @@ var DefaultDockerSDConfig = DockerSDConfig{
 	RefreshInterval:  model.Duration(60 * time.Second),
 	Port:             80,
 	Filters:          []Filter{},
+	HostNetworkHost:  "localhost",
 	HTTPClientConfig: config.DefaultHTTPClientConfig,
 }
 
@@ -65,9 +66,10 @@ func init() {
 type DockerSDConfig struct {
 	HTTPClientConfig config.HTTPClientConfig `yaml:",inline"`
 
-	Host    string   `yaml:"host"`
-	Port    int      `yaml:"port"`
-	Filters []Filter `yaml:"filters"`
+	Host            string   `yaml:"host"`
+	Port            int      `yaml:"port"`
+	Filters         []Filter `yaml:"filters"`
+	HostNetworkHost string   `yaml:"host_network_host"`
 
 	RefreshInterval model.Duration `yaml:"refresh_interval"`
 }
@@ -104,9 +106,10 @@ func (c *DockerSDConfig) UnmarshalYAML(unmarshal func(interface{}) error) error
 
 type DockerDiscovery struct {
 	*refresh.Discovery
-	client  *client.Client
-	port    int
-	filters filters.Args
+	client          *client.Client
+	port            int
+	hostNetworkHost string
+	filters         filters.Args
 }
 
 // NewDockerDiscovery returns a new DockerDiscovery which periodically refreshes its targets.
@@ -114,7 +117,8 @@ func NewDockerDiscovery(conf *DockerSDConfig, logger log.Logger) (*DockerDiscove
 	var err error
 
 	d := &DockerDiscovery{
-		port: conf.Port,
+		port:            conf.Port,
+		hostNetworkHost: conf.HostNetworkHost,
 	}
 
 	hostURL, err := url.Parse(conf.Host)
@@ -245,7 +249,15 @@ func (d *DockerDiscovery) refresh(ctx context.Context) ([]*targetgroup.Group, er
 					labels[model.LabelName(k)] = model.LabelValue(v)
 				}
 
-				addr := net.JoinHostPort(n.IPAddress, strconv.FormatUint(uint64(d.port), 10))
+				// Containers in host networking mode don't have ports,
+				// so they only end up here, not in the previous loop.
+				var addr string
+				if c.HostConfig.NetworkMode != "host" {
+					addr = net.JoinHostPort(n.IPAddress, strconv.FormatUint(uint64(d.port), 10))
+				} else {
+					addr = d.hostNetworkHost
+				}
+
 				labels[model.AddressLabel] = model.LabelValue(addr)
 				tg.Targets = append(tg.Targets, labels)
 			}