Skip DRIVER env vars for labels without a port mapping

client/driver/env/env.go

@@ -514,9 +514,9 @@ func buildPortEnv(envMap map[string]string, p structs.Port, ip string, driverNet
 	envMap[HostAddrPrefix+p.Label] = net.JoinHostPort(ip, portStr)
 
 	// Driver IP, PORT, and ADDR if available
-	if driverNet != nil {
-		driverPortStr := strconv.Itoa(driverNet.PortMap[p.Label])
+	if driverNet != nil && driverNet.PortMap[p.Label] != 0 {
 		envMap[DriverIpPrefix+p.Label] = driverNet.IP
+		driverPortStr := strconv.Itoa(driverNet.PortMap[p.Label])
 		envMap[DriverPortPrefix+p.Label] = driverPortStr
 		envMap[DriverAddrPrefix+p.Label] = net.JoinHostPort(driverNet.IP, driverPortStr)
 	}

client/driver/env/env_test.go

@@ -8,6 +8,7 @@ import (
 	"strings"
 	"testing"
 
+	cstructs "github.com/hashicorp/nomad/client/structs"
 	"github.com/hashicorp/nomad/nomad/mock"
 	"github.com/hashicorp/nomad/nomad/structs"
 )
@@ -164,7 +165,9 @@ func TestEnvironment_AsList(t *testing.T) {
 			DynamicPorts:  []structs.Port{{Label: "https", Value: 8080}},
 		},
 	}
-	env := NewBuilder(n, a, task, "global").SetPortMap(map[string]int{"https": 443})
+	env := NewBuilder(n, a, task, "global").SetDriverNetwork(
+		&cstructs.DriverNetwork{PortMap: map[string]int{"https": 443}},
+	)
 
 	act := env.Build().List()
 	exp := []string{
@@ -184,6 +187,13 @@ func TestEnvironment_AsList(t *testing.T) {
 		"NOMAD_IP_ssh_ssh=192.168.0.100",
 		"NOMAD_PORT_ssh_other=1234",
 		"NOMAD_PORT_ssh_ssh=22",
+		"NOMAD_DRIVER_ADDR_https=:443",
+		"NOMAD_DRIVER_IP_https=",
+		"NOMAD_DRIVER_PORT_https=443",
+		"NOMAD_HOST_ADDR_http=127.0.0.1:80",
+		"NOMAD_HOST_ADDR_https=127.0.0.1:8080",
+		"NOMAD_HOST_IP_http=127.0.0.1",
+		"NOMAD_HOST_IP_https=127.0.0.1",
 		"NOMAD_CPU_LIMIT=500",
 		"NOMAD_DC=dc1",
 		"NOMAD_REGION=global",
@@ -204,7 +214,7 @@ func TestEnvironment_AsList(t *testing.T) {
 	sort.Strings(act)
 	sort.Strings(exp)
 	if len(act) != len(exp) {
-		t.Fatalf("expected %d vars != %d actual, actual: %s\n\nexpected: %s\n",
+		t.Fatalf("expected %d vars != %d actual, actual:\n%s\n\nexpected:\n%s\n",
 			len(act), len(exp), strings.Join(act, "\n"), strings.Join(exp, "\n"))
 	}
 	for i := range act {
@@ -249,7 +259,8 @@ func TestEnvironment_Envvars(t *testing.T) {
 	a := mock.Alloc()
 	task := a.Job.TaskGroups[0].Tasks[0]
 	task.Env = envMap
-	act := NewBuilder(n, a, task, "global").SetPortMap(portMap).Build().All()
+	net := &cstructs.DriverNetwork{PortMap: portMap}
+	act := NewBuilder(n, a, task, "global").SetDriverNetwork(net).Build().All()
 	for k, v := range envMap {
 		actV, ok := act[k]
 		if !ok {

nomad/structs/diff_test.go

@@ -3119,8 +3119,9 @@ func TestTaskDiff(t *testing.T) {
 			New: &Task{
 				Services: []*Service{
 					{
-						Name:      "foo",
-						PortLabel: "bar",
+						Name:        "foo",
+						PortLabel:   "bar",
+						AddressMode: "driver",
 					},
 				},
 			},
@@ -3131,6 +3132,11 @@ func TestTaskDiff(t *testing.T) {
 						Type: DiffTypeEdited,
 						Name: "Service",
 						Fields: []*FieldDiff{
+							{
+								Type: DiffTypeAdded,
+								Name: "AddressMode",
+								New:  "driver",
+							},
 							{
 								Type: DiffTypeNone,
 								Name: "Name",
@@ -3410,6 +3416,12 @@ func TestTaskDiff(t *testing.T) {
 						Type: DiffTypeEdited,
 						Name: "Service",
 						Fields: []*FieldDiff{
+							{
+								Type: DiffTypeNone,
+								Name: "AddressMode",
+								Old:  "",
+								New:  "",
+							},
 							{
 								Type: DiffTypeNone,
 								Name: "Name",

nomad/structs/structs.go

@@ -2540,7 +2540,7 @@ func (s *Service) Validate() error {
 	}
 
 	switch s.AddressMode {
-	case AddressModeAuto, AddressModeHost, AddressModeDriver:
+	case "", AddressModeAuto, AddressModeHost, AddressModeDriver:
 		// OK
 	default:
 		mErr.Errors = append(mErr.Errors, fmt.Errorf("service address_mode must be %q, %q, or %q; not %q", AddressModeAuto, AddressModeHost, AddressModeDriver, s.AddressMode))