feat: create a shared volume

The shared volume will be used by each container
to share their specific traefik dynamic
configuration to allow Traefik to dynamically
configure the backend.

.gitignore

@@ -0,0 +1 @@
+helix

internal/config/config.go

@@ -6,28 +6,34 @@ import (
 	"io/ioutil"
 )
 
+// Config is the whole configuration for the forge platform deployment.
 type Config struct {
 	ProjectName string         `json:"project"`
 	Docker      DockerConfig   `json:"docker"`
 	Services    ServicesConfig `json:"services"`
 }
 
-// DockerConfig contains the configuration for
-// docker specific components.
+// DockerConfig contains the configuration for docker specific components.
 type DockerConfig struct {
-	Network DockerNetworkConfig `json:"network"`
+	Network      DockerNetworkConfig      `json:"network"`
+	SharedVolume DockerSharedVolumeConfig `json:"sharedVolume"`
 }
 
-// DockerNetworkStackArgs contains arguments for
-// creating the DockerNetworkStack
+// DockerNetworkConfig contains configuration for creating the docker network.
+
 type DockerNetworkConfig struct {
 	Name   string `json:"name"`
 	Subnet string `json:"subnet"`
 	Driver string `json:"driver"`
 }
 
-// Services contains a list of
-// services and their configuration
+// DockerSharedVolumeConfig contains configuration
+// for creating the shared volume.
+type DockerSharedVolumeConfig struct {
+	Name string `json:"name"`
+}
+
+// Services contains a list of services and their configuration.
 type ServicesConfig struct {
 	Traefik TraefikConfig `json:"traefik"`
 }

internal/config/config_test.go

@@ -23,6 +23,9 @@ func TestValidConfig(t *testing.T) {
 					Subnet: "172.17.1.0/24",
 					Driver: "default",
 				},
+				SharedVolume: DockerSharedVolumeConfig{
+					Name: "shared-volume",
+				},
 			},
 			Services: ServicesConfig{
 				Traefik: TraefikConfig{

internal/config/testdata/config-valid.json

@@ -5,6 +5,9 @@
       "subnet": "172.17.1.0/24",
       "name": "forge-platform-test-netwwork",
       "driver": "default"
+    },
+    "sharedVolume": {
+      "name": "shared-volume"
     }
   },
   "services": {

internal/docker/container.go

@@ -27,7 +27,7 @@ type DockerVolumeMount struct {
 	MountPath pulumi.StringInput
 }
 
-func CreateDockerContainer(ctx *pulumi.Context, c DockerContainerInput) error {
+func CreateContainer(ctx *pulumi.Context, c DockerContainerInput) error {
 	// all containers will mount the host's timezone and localtime files
 	// to ensure the correct time is synced.
 	volumes := []docker.ContainerVolumeInput{

internal/docker/image.go

@@ -25,7 +25,7 @@ type DockerImageOutput struct {
 }
 
 // CreateDockerImage creates a local Docker image.
-func CreateDockerImage(ctx *pulumi.Context, c DockerImageInput) (DockerImageOutput, error) {
+func CreateImage(ctx *pulumi.Context, c DockerImageInput) (DockerImageOutput, error) {
 	var output DockerImageOutput
 
 	args := docker.ImageArgs{

internal/docker/volume.go

@@ -0,0 +1,36 @@
+package docker
+
+import (
+	"fmt"
+
+	"github.com/pulumi/pulumi-docker/sdk/v3/go/docker"
+	"github.com/pulumi/pulumi/sdk/v3/go/pulumi"
+)
+
+type DockerVolumeInput struct {
+	Name pulumi.StringInput
+	UniqueLabel string
+}
+
+type DockerVolumeOutput struct {
+	Name pulumi.StringOutput
+}
+
+func CreateVolume(ctx *pulumi.Context, input DockerVolumeInput) (DockerVolumeOutput, error) {
+	var output DockerVolumeOutput
+
+	args := docker.VolumeArgs{
+		Name: input.Name,
+	}
+
+	volume, err := docker.NewVolume(ctx, input.UniqueLabel, &args)
+	if err != nil {
+		return output, fmt.Errorf("unable to create the %s volume...\n%v", input.UniqueLabel, err)
+	}
+
+	output = DockerVolumeOutput{
+		Name: volume.Name,
+	}
+
+	return output, nil
+}

internal/stacks/docker.go

@@ -31,7 +31,7 @@ var templateTraefikStaticConfig string
 
 // newContainerStack creates the ContainerStack value.
 func newDockerStack(ctx context.Context, project, stack string, c config.Config) (*DockerStack, error) {
-	deployFunc := deployDockerStack(project, c.Docker.Network, c.Services)
+	deployFunc := deployDockerStack(project, c.Docker, c.Services)
 
 	s, err := createOrSelectStack(ctx, project, stack, deployFunc)
 	if err != nil {
@@ -78,18 +78,29 @@ func (c *DockerStack) Destroy(ctx context.Context) error {
 
 // deployDockerStack returns a Pulumi run function
 // that is used to deploy the docker stack.
-func deployDockerStack(project string, network config.DockerNetworkConfig, services config.ServicesConfig) pulumi.RunFunc {
+func deployDockerStack(project string, dockerConfig config.DockerConfig, services config.ServicesConfig) pulumi.RunFunc {
 	return func(ctx *pulumi.Context) error {
 		// TODO: Create the provider when we start playing with remote hosts
 
 		// Create the docker network
-		config := docker.DockerNetworkConfig{
-			Name:   pulumi.String(network.Name),
-			Subnet: pulumi.String(network.Subnet),
-			Driver: pulumi.String(network.Driver),
+		networkConfig := docker.DockerNetworkConfig{
+			Name:   pulumi.String(dockerConfig.Network.Name),
+			Subnet: pulumi.String(dockerConfig.Network.Subnet),
+			Driver: pulumi.String(dockerConfig.Network.Driver),
 		}
 
-		network, err := docker.CreateNetwork(ctx, config)
+		network, err := docker.CreateNetwork(ctx, networkConfig)
+		if err != nil {
+			return err
+		}
+
+		// Create the shared volume
+		sharedVolumeInput := docker.DockerVolumeInput{
+			Name: pulumi.String(dockerConfig.SharedVolume.Name),
+			UniqueLabel: "shared",
+		}
+
+		_, err = docker.CreateVolume(ctx, sharedVolumeInput)
 		if err != nil {
 			return err
 		}
@@ -122,7 +133,7 @@ func deployDockerStack(project string, network config.DockerNetworkConfig, servi
 			UniqueLabel:  "traefik-image",
 		}
 
-		traefikImage, err := docker.CreateDockerImage(ctx, c)
+		traefikImage, err := docker.CreateImage(ctx, c)
 		if err != nil {
 			return err
 		}
@@ -135,7 +146,7 @@ func deployDockerStack(project string, network config.DockerNetworkConfig, servi
 			UniqueLabel: "traefik-container",
 		}
 
-		if err = docker.CreateDockerContainer(ctx, traefikContainerInput); err != nil {
+		if err = docker.CreateContainer(ctx, traefikContainerInput); err != nil {
 			return err
 		}