Avoid flakiness of TestLinkContainers

Signed-off-by: Flavio Crisciani <flavio.crisciani@docker.com>

Author: Flavio Crisciani

drivers/bridge/bridge_test.go

@@ -181,7 +181,9 @@ func getIPv4Data(t *testing.T, iface string) []driverapi.IPAMData {
 }
 
 func TestCreateFullOptions(t *testing.T) {
-	defer testutils.SetupTestOSContext(t)()
+	if !testutils.IsRunningInContainer() {
+		defer testutils.SetupTestOSContext(t)()
+	}
 	d := newDriver()
 
 	config := &configuration{
@@ -604,8 +606,9 @@ func TestQueryEndpointInfoHairpin(t *testing.T) {
 }
 
 func testQueryEndpointInfo(t *testing.T, ulPxyEnabled bool) {
-	defer testutils.SetupTestOSContext(t)()
-
+	if !testutils.IsRunningInContainer() {
+		defer testutils.SetupTestOSContext(t)()
+	}
 	d := newDriver()
 
 	config := &configuration{

iptables/iptables.go

@@ -151,11 +151,11 @@ func ProgramChain(c *ChainInfo, bridgeName string, hairpinMode, enable bool) err
 			"-j", c.Name}
 		if !Exists(Nat, "PREROUTING", preroute...) && enable {
 			if err := c.Prerouting(Append, preroute...); err != nil {
-				return fmt.Errorf("Failed to inject docker in PREROUTING chain: %s", err)
+				return fmt.Errorf("Failed to inject %s in PREROUTING chain: %s", c.Name, err)
 			}
 		} else if Exists(Nat, "PREROUTING", preroute...) && !enable {
 			if err := c.Prerouting(Delete, preroute...); err != nil {
-				return fmt.Errorf("Failed to remove docker in PREROUTING chain: %s", err)
+				return fmt.Errorf("Failed to remove %s in PREROUTING chain: %s", c.Name, err)
 			}
 		}
 		output := []string{
@@ -167,11 +167,11 @@ func ProgramChain(c *ChainInfo, bridgeName string, hairpinMode, enable bool) err
 		}
 		if !Exists(Nat, "OUTPUT", output...) && enable {
 			if err := c.Output(Append, output...); err != nil {
-				return fmt.Errorf("Failed to inject docker in OUTPUT chain: %s", err)
+				return fmt.Errorf("Failed to inject %s in OUTPUT chain: %s", c.Name, err)
 			}
 		} else if Exists(Nat, "OUTPUT", output...) && !enable {
 			if err := c.Output(Delete, output...); err != nil {
-				return fmt.Errorf("Failed to inject docker in OUTPUT chain: %s", err)
+				return fmt.Errorf("Failed to inject %s in OUTPUT chain: %s", c.Name, err)
 			}
 		}
 	case Filter: