Add support for creating network if it is missing

config/config.go

@@ -108,29 +108,48 @@ type SftpConfiguration struct {
 	ReadOnly bool `default:"false" yaml:"read_only"`
 }
 
+type dockerNetworkInterfaces struct {
+	V4 struct {
+		Subnet  string `default:"172.18.0.0/16"`
+		Gateway string `default:"172.18.0.1"`
+	}
+
+	V6 struct {
+		Subnet  string `default:"fdba:17c8:6c94::/64"`
+		Gateway string `default:"fdba:17c8:6c94::1011"`
+	}
+}
+
+type DockerNetworkConfiguration struct {
+	// The interface that should be used to create the network. Must not conflict
+	// with any other interfaces in use by Docker or on the system.
+	Interface string `default:"172.18.0.1"`
+
+	// The name of the network to use. If this network already exists it will not
+	// be created. If it is not found, a new network will be created using the interface
+	// defined.
+	Name       string `default:"pterodactyl_nw"`
+	ISPN       bool   `default:"false" yaml:"ispn"`
+	Driver     string `default:"bridge"`
+	IsInternal bool   `default:"false" yaml:"is_internal"`
+	EnableICC  bool   `default:"true" yaml:"enable_icc"`
+	Interfaces *dockerNetworkInterfaces `yaml:"interfaces"`
+}
+
 // Defines the docker configuration used by the daemon when interacting with
 // containers and networks on the system.
 type DockerConfiguration struct {
 	// Network configuration that should be used when creating a new network
 	// for containers run through the daemon.
-	Network struct {
+	Network *DockerNetworkConfiguration `yaml:"network"`
-		// The interface that should be used to create the network. Must not conflict
-		// with any other interfaces in use by Docker or on the system.
-		Interface string
-
-		// The name of the network to use. If this network already exists it will not
-		// be created. If it is not found, a new network will be created using the interface
-		// defined.
-		Name string
-	}
 
 	// If true, container images will be updated when a server starts if there
 	// is an update available. If false the daemon will not attempt updates and will
 	// defer to the host system to manage image updates.
-	UpdateImages bool `yaml:"update_images"`
+	UpdateImages bool `default:"true" yaml:"update_images"`
 
 	// The location of the Docker socket.
-	Socket string
+	Socket string `default:"/var/run/docker.sock"`
 
 	// Defines the location of the timezone file on the host system that should
 	// be mounted into the created containers so that they all use the same time.
@@ -167,8 +186,11 @@ func (c *Configuration) SetDefaults() {
 		Username:     "pterodactyl",
 		Data:         "/srv/daemon-data",
 		TimezonePath: "/etc/timezone",
+		Sftp:         &SftpConfiguration{},
 	}
 
+	defaults.SetDefaults(c.System.Sftp)
+
 	// By default the internal webserver should bind to all interfaces and
 	// be served on port 8080.
 	c.Api = &ApiConfiguration{
@@ -195,11 +217,14 @@ func (c *Configuration) SetDefaults() {
 	c.Throttles.CheckInterval = 100
 
 	// Configure the defaults for Docker connection and networks.
-	c.Docker = &DockerConfiguration{}
+	c.Docker = &DockerConfiguration{
-	c.Docker.UpdateImages = true
+		Network: &DockerNetworkConfiguration{
-	c.Docker.Socket = "/var/run/docker.sock"
+			Interfaces: &dockerNetworkInterfaces{},
-	c.Docker.Network.Name = "pterodactyl_nw"
+		},
-	c.Docker.Network.Interface = "172.18.0.1"
+	}
+	defaults.SetDefaults(c.Docker)
+	defaults.SetDefaults(c.Docker.Network)
+	defaults.SetDefaults(c.Docker.Network.Interfaces)
 }
 
 // Reads the configuration from the provided file and returns the configuration
@@ -210,13 +235,8 @@ func ReadConfiguration(path string) (*Configuration, error) {
 		return nil, err
 	}
 
-	sftp :=new(SftpConfiguration)
-	defaults.SetDefaults(sftp)
-
 	c := new(Configuration)
-	c.System = new(SystemConfiguration)
+	c.SetDefaults()
-	c.System.Sftp = sftp
-	defaults.SetDefaults(c)
 
 	// Replace environment variables within the configuration file with their
 	// values from the host system.

environment.go

@@ -0,0 +1,95 @@
+package main
+
+import (
+	"context"
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/api/types/network"
+	"github.com/docker/docker/client"
+	"github.com/pterodactyl/wings/config"
+	"go.uber.org/zap"
+)
+
+// Configures the required network for the docker environment.
+func ConfigureDockerEnvironment(c *config.DockerConfiguration) error {
+	// Ensure the required docker network exists on the system.
+	cli, err := client.NewClientWithOpts(client.FromEnv)
+	if err != nil {
+		return err
+	}
+
+	resource, err := cli.NetworkInspect(context.Background(), c.Network.Name, types.NetworkInspectOptions{})
+	if err != nil && client.IsErrNotFound(err) {
+		zap.S().Infow("creating missing pterodactyl0 interface, this could take a few seconds...")
+		return createDockerNetwork(cli, c)
+	} else if err != nil {
+		zap.S().Fatalw("failed to create required docker network for containers", zap.Error(err))
+	}
+
+	switch resource.Driver {
+	case "host":
+		c.Network.Interface = "127.0.0.1"
+		c.Network.ISPN = false
+		return nil
+	case "overlay":
+	case "weavemesh":
+		c.Network.Interface = ""
+		c.Network.ISPN = true
+		return nil
+	default:
+		c.Network.ISPN = false
+	}
+
+	return nil
+}
+
+// Creates a new network on the machine if one does not exist already.
+func createDockerNetwork(cli *client.Client, c *config.DockerConfiguration) error {
+	_, err := cli.NetworkCreate(context.Background(), c.Network.Name, types.NetworkCreate{
+		Driver:     c.Network.Driver,
+		EnableIPv6: true,
+		Internal:   c.Network.IsInternal,
+		IPAM: &network.IPAM{
+			Config: []network.IPAMConfig{
+				{
+					Subnet:  c.Network.Interfaces.V4.Subnet,
+					Gateway: c.Network.Interfaces.V4.Gateway,
+				},
+				{
+					Subnet:  c.Network.Interfaces.V6.Subnet,
+					Gateway: c.Network.Interfaces.V6.Gateway,
+				},
+			},
+		},
+		Options: map[string]string{
+			"encryption": "false",
+			"com.docker.network.bridge.default_bridge":       "false",
+			"com.docker.network.bridge.enable_icc":           "true",
+			"com.docker.network.bridge.enable_ip_masquerade": "true",
+			"com.docker.network.bridge.host_binding_ipv4":    "0.0.0.0",
+			"com.docker.network.bridge.name":                 "pterodactyl0",
+			"com.docker.network.driver.mtu":                  "1500",
+		},
+	})
+
+	if err != nil {
+		return err
+	}
+
+	switch c.Network.Driver {
+	case "host":
+		c.Network.Interface = "127.0.0.1"
+		c.Network.ISPN = false
+		break
+	case "overlay":
+	case "weavemesh":
+		c.Network.Interface = ""
+		c.Network.ISPN = true
+		break
+	default:
+		c.Network.Interface = c.Network.Interfaces.V4.Gateway
+		c.Network.ISPN = false
+		break
+	}
+
+	return nil
+}

wings.go

@@ -12,6 +12,7 @@ import (
 	"github.com/remeh/sizedwaitgroup"
 	"go.uber.org/zap"
 	"net/http"
+	"os"
 )
 
 // Entrypoint for the Wings application. Configures the logger and checks any
@@ -70,6 +71,15 @@ func main() {
 		return
 	}
 
+	if err := ConfigureDockerEnvironment(c.Docker); err != nil {
+		zap.S().Fatalw("failed to configure docker environment", zap.Error(errors.WithStack(err)))
+		os.Exit(1)
+	}
+
+	if err := c.WriteToDisk(); err != nil {
+		zap.S().Errorw("failed to save configuration to disk", zap.Error(errors.WithStack(err)))
+	}
+
 	// Just for some nice log output.
 	for _, s := range server.GetServers().All() {
 		zap.S().Infow("loaded configuration for server", zap.String("server", s.Uuid))