Clear out iptables configuration if using RedHat 6 or 7 image (#6).

Author: tintoy

client.go

@@ -227,6 +227,7 @@ func (driver *Driver) resolveOSImage() error {
 	}
 
 	driver.ImageID = image.ID
+	driver.ImageOSType = image.OperatingSystem.ID
 
 	return nil
 }

driver.go

@@ -54,6 +54,9 @@ type Driver struct {
 	// The Id of the OS image used to create the machine.
 	ImageID string
 
+	// The operating system type (e.g. "REDHAT764", "CENTOS764", "UBUNTU1464", etc) of the OS image used to create the machine.
+	ImageOSType string
+
 	// The Id of the target server.
 	ServerID string
 
@@ -227,6 +230,17 @@ func (driver *Driver) PreCreateCheck() error {
 		return err
 	}
 
+	switch driver.ImageOSType {
+	case "REDHAT664":
+	case "REDHAT764":
+		log.Warnf("Image '%s' is RedHat 6 or 7 (64-bit).",
+			driver.ImageName,
+		)
+		log.Warnf("This image is known to have problems with Docker Machine (the ddcloud driver will need to clear the server's iptables configuration when it is provisioned).")
+
+		break
+	}
+
 	return nil
 }
 
@@ -284,6 +298,17 @@ func (driver *Driver) Create() error {
 		return err
 	}
 
+	switch driver.ImageOSType {
+	case "REDHAT664":
+	case "REDHAT764":
+		err = driver.clearIPTablesConfiguration()
+		if err != nil {
+			return err
+		}
+
+		break
+	}
+
 	log.Infof("Server '%s' has been successfully created.", server.Name)
 
 	return nil

iptables.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"fmt"
+	"github.com/docker/machine/libmachine/log"
+	"github.com/docker/machine/libmachine/ssh"
+)
+
+func (driver *Driver) clearIPTablesConfiguration() error {
+	if !driver.isServerCreated() {
+		return fmt.Errorf("Server '%s' has not been created", driver.MachineName)
+	}
+
+	log.Debugf("Flushing iptables configuration for server '%s'...",
+		driver.MachineName,
+	)
+
+	client, err := ssh.NewNativeClient(driver.SSHUser, driver.IPAddress, driver.SSHPort, &ssh.Auth{
+		Keys: []string{driver.SSHKeyPath},
+	})
+	if err != nil {
+		return err
+	}
+
+	log.Debugf("Run 'iptables -F'...")
+	output, err := client.Output(`iptables -F`)
+	if err != nil {
+		return fmt.Errorf("Failed to run 'iptables -F'\n%s\nOutput:\n%s",
+			err.Error(),
+			output,
+		)
+	}
+
+	log.Debugf("Successfully flushed iptables configuration for server '%s'.",
+		driver.MachineName,
+	)
+
+	return nil
+}

ssh_bootstrap.go

@@ -22,7 +22,7 @@ import (
 
 // Bootstrap key-based SSH authentication by installing an SSH public key on the target machine.
 func (driver *Driver) installSSHKey() error {
-	if driver.ServerID == "" {
+	if !driver.isServerCreated() {
 		return errors.New("Server has not been deployed")
 	}