Merge pull request #1088 from lpetre/amazon_ecs_provider

Add an ECS provider

configuration.go

@@ -50,6 +50,7 @@ type GlobalConfiguration struct {
 	Kubernetes                *provider.Kubernetes    `description:"Enable Kubernetes backend"`
 	Mesos                     *provider.Mesos         `description:"Enable Mesos backend"`
 	Eureka                    *provider.Eureka        `description:"Enable Eureka backend"`
+	ECS                       *provider.ECS           `description:"Enable ECS backend"`
 }
 
 // DefaultEntryPoints holds default entry points
@@ -391,6 +392,14 @@ func NewTraefikDefaultPointersConfiguration() *TraefikConfiguration {
 	defaultMesos.ExposedByDefault = true
 	defaultMesos.Constraints = types.Constraints{}
 
+	//default ECS
+	var defaultECS provider.ECS
+	defaultECS.Watch = true
+	defaultECS.ExposedByDefault = true
+	defaultECS.RefreshSeconds = 15
+	defaultECS.Cluster = "default"
+	defaultECS.Constraints = types.Constraints{}
+
 	defaultConfiguration := GlobalConfiguration{
 		Docker:        &defaultDocker,
 		File:          &defaultFile,
@@ -403,6 +412,7 @@ func NewTraefikDefaultPointersConfiguration() *TraefikConfiguration {
 		Boltdb:        &defaultBoltDb,
 		Kubernetes:    &defaultKubernetes,
 		Mesos:         &defaultMesos,
+		ECS:           &defaultECS,
 		Retry:         &Retry{},
 	}
 	return &TraefikConfiguration{

docs/index.md

@@ -11,7 +11,7 @@
 
 
 Træfɪk is a modern HTTP reverse proxy and load balancer made to deploy microservices with ease.
-It supports several backends ([Docker](https://www.docker.com/), [Swarm](https://docs.docker.com/swarm), [Mesos/Marathon](https://mesosphere.github.io/marathon/), [Consul](https://www.consul.io/), [Etcd](https://coreos.com/etcd/), [Zookeeper](https://zookeeper.apache.org), [BoltDB](https://github.com/boltdb/bolt), Rest API, file...) to manage its configuration automatically and dynamically.
+It supports several backends ([Docker](https://www.docker.com/), [Swarm](https://docs.docker.com/swarm), [Mesos/Marathon](https://mesosphere.github.io/marathon/), [Consul](https://www.consul.io/), [Etcd](https://coreos.com/etcd/), [Zookeeper](https://zookeeper.apache.org), [BoltDB](https://github.com/boltdb/bolt), [Amazon ECS](https://aws.amazon.com/ecs/), Rest API, file...) to manage its configuration automatically and dynamically.
 
 ## Overview
 

docs/toml.md

@@ -1347,3 +1347,78 @@ delay = "1m"
 ```
 
 Please refer to the [Key Value storage structure](/user-guide/kv-config/#key-value-storage-structure) section to get documentation on traefik KV structure.
+
+
+## ECS backend
+
+Træfɪk can be configured to use Amazon ECS as a backend configuration:
+
+
+```toml
+################################################################
+# ECS configuration backend
+################################################################
+
+# Enable ECS configuration backend
+#
+# Optional
+#
+[ecs]
+
+# ECS Cluster Name
+#
+# Optional
+# Default: "default"
+#
+Cluster = "default"
+
+# Enable watch ECS changes
+#
+# Optional
+# Default: true
+#
+Watch = true
+
+# Polling interval (in seconds)
+#
+# Optional
+# Default: 15
+#
+RefreshSeconds = 15
+
+# Expose ECS services by default in traefik
+#
+# Optional
+# Default: true
+#
+ExposedByDefault = false
+
+# Region to use when connecting to AWS
+#
+# Optional
+#
+# Region = "us-east-1"
+
+# AccessKeyID to use when connecting to AWS
+#
+# Optional
+#
+# AccessKeyID = "abc"
+
+# SecretAccessKey to use when connecting to AWS
+#
+# Optional
+#
+# SecretAccessKey = "123"
+
+```
+
+Labels can be used on task containers to override default behaviour:
+
+- `traefik.protocol=https`: override the default `http` protocol
+- `traefik.weight=10`: assign this weight to the container
+- `traefik.enable=false`: disable this container in Træfɪk
+- `traefik.frontend.rule=Host:test.traefik.io`: override the default frontend rule (Default: `Host:{containerName}.{domain}`).
+- `traefik.frontend.passHostHeader=true`: forward client `Host` header to the backend.
+- `traefik.frontend.priority=10`: override default frontend priority
+- `traefik.frontend.entryPoints=http,https`: assign this frontend to entry points `http` and `https`. Overrides `defaultEntryPoints`.

glide.lock

@@ -1,5 +1,5 @@
-hash: 2a2f73984ec9cccd62220c0eba5ddc82dec96b0044ffed48b25d964e2f3eee05
-updated: 2017-02-05T17:22:02.550162979+01:00
+hash: a0b0abed2162e490cbe75a6a36ebaaf39e748ee80e419e879e7253679a0bc134
+updated: 2017-02-05T18:09:09.856588042Z
 imports:
 - name: bitbucket.org/ww/goautoneg
   version: 75cd24fc2f2c2a2088577d12123ddee5f54e0675
@@ -35,12 +35,17 @@ imports:
   - aws/session
   - aws/signer/v4
   - private/protocol
+  - private/protocol/ec2query
+  - private/protocol/json/jsonutil
+  - private/protocol/jsonrpc
   - private/protocol/query
   - private/protocol/query/queryutil
   - private/protocol/rest
   - private/protocol/restxml
   - private/protocol/xml/xmlutil
   - private/waiter
+  - service/ec2
+  - service/ecs
   - service/route53
   - service/sts
 - name: github.com/Azure/azure-sdk-for-go
@@ -735,7 +740,7 @@ testImports:
   subpackages:
   - specs-go
 - name: github.com/pkg/errors
-  version: 248dadf4e9068a0b3e79f02ed0a610d935de5302
+  version: 01fa4104b9c248c8945d14d9f128454d5b28d595
 - name: github.com/vbatts/tar-split
   version: 6810cedb21b2c3d0b9bb8f9af12ff2dc7a2f14df
   subpackages:

glide.yaml

@@ -119,7 +119,15 @@ import:
 - package: github.com/aws/aws-sdk-go
   version: v1.6.18
   subpackages:
+  - aws
+  - aws/credentials
+  - aws/defaults
+  - aws/ec2metadata
   - aws/endpoints
+  - aws/request
+  - aws/session
+  - service/ec2
+  - service/ecs
 - package: cloud.google.com/go
   version: v0.6.0
   subpackages:

provider/ecs.go

@@ -0,0 +1,414 @@
+package provider
+
+import (
+	"context"
+	"fmt"
+	"strconv"
+	"strings"
+	"text/template"
+	"time"
+
+	"github.com/BurntSushi/ty/fun"
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/defaults"
+	"github.com/aws/aws-sdk-go/aws/ec2metadata"
+	"github.com/aws/aws-sdk-go/aws/request"
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/ec2"
+	"github.com/aws/aws-sdk-go/service/ecs"
+	"github.com/cenk/backoff"
+	"github.com/containous/traefik/job"
+	"github.com/containous/traefik/log"
+	"github.com/containous/traefik/safe"
+	"github.com/containous/traefik/types"
+)
+
+var _ Provider = (*ECS)(nil)
+
+// ECS holds configurations of the ECS provider.
+type ECS struct {
+	BaseProvider `mapstructure:",squash"`
+
+	Domain           string `description:"Default domain used"`
+	ExposedByDefault bool   `description:"Expose containers by default"`
+	RefreshSeconds   int    `description:"Polling interval (in seconds)"`
+
+	// ECS lookup parameters
+	Cluster         string `description:"ECS Cluster Name"`
+	Region          string `description:"The AWS region to use for requests"`
+	AccessKeyID     string `description:"The AWS credentials access key to use for making requests"`
+	SecretAccessKey string `description:"The AWS credentials access key to use for making requests"`
+}
+
+type ecsInstance struct {
+	Name                string
+	ID                  string
+	task                *ecs.Task
+	taskDefinition      *ecs.TaskDefinition
+	container           *ecs.Container
+	containerDefinition *ecs.ContainerDefinition
+	machine             *ec2.Instance
+}
+
+type awsClient struct {
+	ecs *ecs.ECS
+	ec2 *ec2.EC2
+}
+
+func (provider *ECS) createClient() (*awsClient, error) {
+	sess := session.New()
+	ec2meta := ec2metadata.New(sess)
+	if provider.Region == "" {
+		log.Infoln("No EC2 region provided, querying instance metadata endpoint...")
+		identity, err := ec2meta.GetInstanceIdentityDocument()
+		if err != nil {
+			return nil, err
+		}
+		provider.Region = identity.Region
+	}
+
+	cfg := &aws.Config{
+		Region: &provider.Region,
+		Credentials: credentials.NewChainCredentials(
+			[]credentials.Provider{
+				&credentials.StaticProvider{
+					Value: credentials.Value{
+						AccessKeyID:     provider.AccessKeyID,
+						SecretAccessKey: provider.SecretAccessKey,
+					},
+				},
+				&credentials.EnvProvider{},
+				&credentials.SharedCredentialsProvider{},
+				defaults.RemoteCredProvider(*(defaults.Config()), defaults.Handlers()),
+			}),
+	}
+
+	return &awsClient{
+		ecs.New(sess, cfg),
+		ec2.New(sess, cfg),
+	}, nil
+}
+
+// Provide allows the provider to provide configurations to traefik
+// using the given configuration channel.
+func (provider *ECS) Provide(configurationChan chan<- types.ConfigMessage, pool *safe.Pool, constraints types.Constraints) error {
+
+	provider.Constraints = append(provider.Constraints, constraints...)
+
+	handleCanceled := func(ctx context.Context, err error) error {
+		if ctx.Err() == context.Canceled || err == context.Canceled {
+			return nil
+		}
+		return err
+	}
+
+	pool.Go(func(stop chan bool) {
+		ctx, cancel := context.WithCancel(context.Background())
+		go func() {
+			select {
+			case <-stop:
+				cancel()
+			}
+		}()
+
+		operation := func() error {
+			aws, err := provider.createClient()
+			if err != nil {
+				return err
+			}
+
+			configuration, err := provider.loadECSConfig(ctx, aws)
+			if err != nil {
+				return handleCanceled(ctx, err)
+			}
+
+			configurationChan <- types.ConfigMessage{
+				ProviderName:  "ecs",
+				Configuration: configuration,
+			}
+
+			if provider.Watch {
+				reload := time.NewTicker(time.Second * time.Duration(provider.RefreshSeconds))
+				defer reload.Stop()
+				for {
+					select {
+					case <-reload.C:
+						configuration, err := provider.loadECSConfig(ctx, aws)
+						if err != nil {
+							return handleCanceled(ctx, err)
+						}
+
+						configurationChan <- types.ConfigMessage{
+							ProviderName:  "ecs",
+							Configuration: configuration,
+						}
+					case <-ctx.Done():
+						return handleCanceled(ctx, ctx.Err())
+					}
+				}
+			}
+
+			return nil
+		}
+
+		notify := func(err error, time time.Duration) {
+			log.Errorf("ECS connection error %+v, retrying in %s", err, time)
+		}
+		err := backoff.RetryNotify(safe.OperationWithRecover(operation), job.NewBackOff(backoff.NewExponentialBackOff()), notify)
+		if err != nil {
+			log.Errorf("Cannot connect to ECS api %+v", err)
+		}
+	})
+
+	return nil
+}
+
+func wrapAws(ctx context.Context, req *request.Request) error {
+	req.HTTPRequest = req.HTTPRequest.WithContext(ctx)
+	return req.Send()
+}
+
+func (provider *ECS) loadECSConfig(ctx context.Context, client *awsClient) (*types.Configuration, error) {
+	var ecsFuncMap = template.FuncMap{
+		"filterFrontends": provider.filterFrontends,
+		"getFrontendRule": provider.getFrontendRule,
+	}
+
+	instances, err := provider.listInstances(ctx, client)
+	if err != nil {
+		return nil, err
+	}
+
+	instances = fun.Filter(provider.filterInstance, instances).([]ecsInstance)
+
+	return provider.getConfiguration("templates/ecs.tmpl", ecsFuncMap, struct {
+		Instances []ecsInstance
+	}{
+		instances,
+	})
+}
+
+// Find all running ECS tasks in a cluster, also collect the task definitions (for docker labels)
+// and the EC2 instance data
+func (provider *ECS) listInstances(ctx context.Context, client *awsClient) ([]ecsInstance, error) {
+	var taskArns []*string
+	req, _ := client.ecs.ListTasksRequest(&ecs.ListTasksInput{
+		Cluster:       &provider.Cluster,
+		DesiredStatus: aws.String(ecs.DesiredStatusRunning),
+	})
+
+	for ; req != nil; req = req.NextPage() {
+		if err := wrapAws(ctx, req); err != nil {
+			return nil, err
+		}
+
+		taskArns = append(taskArns, req.Data.(*ecs.ListTasksOutput).TaskArns...)
+	}
+
+	req, taskResp := client.ecs.DescribeTasksRequest(&ecs.DescribeTasksInput{
+		Tasks:   taskArns,
+		Cluster: &provider.Cluster,
+	})
+
+	if err := wrapAws(ctx, req); err != nil {
+		return nil, err
+	}
+
+	containerInstanceArns := make([]*string, 0)
+	byContainerInstance := make(map[string]int)
+
+	taskDefinitionArns := make([]*string, 0)
+	byTaskDefinition := make(map[string]int)
+
+	for _, task := range taskResp.Tasks {
+		if _, found := byContainerInstance[*task.ContainerInstanceArn]; !found {
+			byContainerInstance[*task.ContainerInstanceArn] = len(containerInstanceArns)
+			containerInstanceArns = append(containerInstanceArns, task.ContainerInstanceArn)
+		}
+		if _, found := byTaskDefinition[*task.TaskDefinitionArn]; !found {
+			byTaskDefinition[*task.TaskDefinitionArn] = len(taskDefinitionArns)
+			taskDefinitionArns = append(taskDefinitionArns, task.TaskDefinitionArn)
+		}
+	}
+
+	machines, err := provider.lookupEc2Instances(ctx, client, containerInstanceArns)
+	if err != nil {
+		return nil, err
+	}
+
+	taskDefinitions, err := provider.lookupTaskDefinitions(ctx, client, taskDefinitionArns)
+	if err != nil {
+		return nil, err
+	}
+
+	var instances []ecsInstance
+	for _, task := range taskResp.Tasks {
+
+		machineIdx := byContainerInstance[*task.ContainerInstanceArn]
+		taskDefIdx := byTaskDefinition[*task.TaskDefinitionArn]
+
+		for _, container := range task.Containers {
+
+			taskDefinition := taskDefinitions[taskDefIdx]
+			var containerDefinition *ecs.ContainerDefinition
+			for _, def := range taskDefinition.ContainerDefinitions {
+				if *container.Name == *def.Name {
+					containerDefinition = def
+					break
+				}
+			}
+
+			instances = append(instances, ecsInstance{
+				fmt.Sprintf("%s-%s", strings.Replace(*task.Group, ":", "-", 1), *container.Name),
+				(*task.TaskArn)[len(*task.TaskArn)-12:],
+				task,
+				taskDefinition,
+				container,
+				containerDefinition,
+				machines[machineIdx],
+			})
+		}
+	}
+
+	return instances, nil
+}
+
+func (provider *ECS) lookupEc2Instances(ctx context.Context, client *awsClient, containerArns []*string) ([]*ec2.Instance, error) {
+	req, containerResp := client.ecs.DescribeContainerInstancesRequest(&ecs.DescribeContainerInstancesInput{
+		ContainerInstances: containerArns,
+		Cluster:            &provider.Cluster,
+	})
+
+	if err := wrapAws(ctx, req); err != nil {
+		return nil, err
+	}
+
+	order := make(map[string]int)
+	for i, arn := range containerArns {
+		order[*arn] = i
+	}
+
+	instanceIds := make([]*string, len(containerArns))
+	for i, container := range containerResp.ContainerInstances {
+		order[*container.Ec2InstanceId] = order[*container.ContainerInstanceArn]
+		instanceIds[i] = container.Ec2InstanceId
+	}
+
+	req, instancesResp := client.ec2.DescribeInstancesRequest(&ec2.DescribeInstancesInput{
+		InstanceIds: instanceIds,
+	})
+
+	if err := wrapAws(ctx, req); err != nil {
+		return nil, err
+	}
+
+	instances := make([]*ec2.Instance, len(containerArns))
+	for _, r := range instancesResp.Reservations {
+		instances[order[*r.Instances[0].InstanceId]] = r.Instances[0]
+	}
+	return instances, nil
+}
+
+func (provider *ECS) lookupTaskDefinitions(ctx context.Context, client *awsClient, taskDefArns []*string) ([]*ecs.TaskDefinition, error) {
+	taskDefinitions := make([]*ecs.TaskDefinition, len(taskDefArns))
+	for i, arn := range taskDefArns {
+
+		req, resp := client.ecs.DescribeTaskDefinitionRequest(&ecs.DescribeTaskDefinitionInput{
+			TaskDefinition: arn,
+		})
+
+		if err := wrapAws(ctx, req); err != nil {
+			return nil, err
+		}
+
+		taskDefinitions[i] = resp.TaskDefinition
+	}
+	return taskDefinitions, nil
+}
+
+func (i ecsInstance) label(k string) string {
+	if v, found := i.containerDefinition.DockerLabels[k]; found {
+		return *v
+	}
+	return ""
+}
+
+func (provider *ECS) filterInstance(i ecsInstance) bool {
+	if len(i.container.NetworkBindings) == 0 {
+		log.Debugf("Filtering ecs instance without port %s (%s)", i.Name, i.ID)
+		return false
+	}
+
+	label := i.label("traefik.enable")
+	enabled := provider.ExposedByDefault && label != "false" || label == "true"
+	if !enabled {
+		log.Debugf("Filtering disabled ecs instance %s (%s) (traefik.enabled = '%s')", i.Name, i.ID, label)
+		return false
+	}
+
+	return true
+}
+
+func (provider *ECS) filterFrontends(instances []ecsInstance) []ecsInstance {
+	byName := make(map[string]bool)
+
+	return fun.Filter(func(i ecsInstance) bool {
+		if _, found := byName[i.Name]; !found {
+			byName[i.Name] = true
+			return true
+		}
+
+		return false
+	}, instances).([]ecsInstance)
+}
+
+func (provider *ECS) getFrontendRule(i ecsInstance) string {
+	if label := i.label("traefik.frontend.rule"); label != "" {
+		return label
+	}
+	return "Host:" + strings.ToLower(strings.Replace(i.Name, "_", "-", -1)) + "." + provider.Domain
+}
+
+func (i ecsInstance) Protocol() string {
+	if label := i.label("traefik.protocol"); label != "" {
+		return label
+	}
+	return "http"
+}
+
+func (i ecsInstance) Host() string {
+	return *i.machine.PrivateIpAddress
+}
+
+func (i ecsInstance) Port() string {
+	return strconv.FormatInt(*i.container.NetworkBindings[0].HostPort, 10)
+}
+
+func (i ecsInstance) Weight() string {
+	if label := i.label("traefik.weight"); label != "" {
+		return label
+	}
+	return "0"
+}
+
+func (i ecsInstance) PassHostHeader() string {
+	if label := i.label("traefik.frontend.passHostHeader"); label != "" {
+		return label
+	}
+	return "true"
+}
+
+func (i ecsInstance) Priority() string {
+	if label := i.label("traefik.frontend.priority"); label != "" {
+		return label
+	}
+	return "0"
+}
+
+func (i ecsInstance) EntryPoints() []string {
+	if label := i.label("traefik.frontend.entryPoints"); label != "" {
+		return strings.Split(label, ",")
+	}
+	return []string{}
+}

provider/ecs_test.go

@@ -0,0 +1,223 @@
+package provider
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/service/ec2"
+	"github.com/aws/aws-sdk-go/service/ecs"
+)
+
+func makeEcsInstance(containerDef *ecs.ContainerDefinition) ecsInstance {
+	container := &ecs.Container{
+		Name:            containerDef.Name,
+		NetworkBindings: make([]*ecs.NetworkBinding, len(containerDef.PortMappings)),
+	}
+
+	for i, pm := range containerDef.PortMappings {
+		container.NetworkBindings[i] = &ecs.NetworkBinding{
+			HostPort:      pm.HostPort,
+			ContainerPort: pm.ContainerPort,
+			Protocol:      pm.Protocol,
+			BindIP:        aws.String("0.0.0.0"),
+		}
+	}
+
+	return ecsInstance{
+		Name: "foo-http",
+		ID:   "123456789abc",
+		task: &ecs.Task{
+			Containers: []*ecs.Container{container},
+		},
+		taskDefinition: &ecs.TaskDefinition{
+			ContainerDefinitions: []*ecs.ContainerDefinition{containerDef},
+		},
+		container:           container,
+		containerDefinition: containerDef,
+		machine: &ec2.Instance{
+			PrivateIpAddress: aws.String("10.0.0.0"),
+		},
+	}
+}
+
+func simpleEcsInstance(labels map[string]*string) ecsInstance {
+	return makeEcsInstance(&ecs.ContainerDefinition{
+		Name: aws.String("http"),
+		PortMappings: []*ecs.PortMapping{{
+			HostPort:      aws.Int64(80),
+			ContainerPort: aws.Int64(80),
+			Protocol:      aws.String("tcp"),
+		}},
+		DockerLabels: labels,
+	})
+}
+
+func TestEcsProtocol(t *testing.T) {
+	cases := []struct {
+		expected     string
+		instanceInfo ecsInstance
+	}{
+		{
+			expected:     "http",
+			instanceInfo: simpleEcsInstance(map[string]*string{}),
+		},
+		{
+			expected: "https",
+			instanceInfo: simpleEcsInstance(map[string]*string{
+				"traefik.protocol": aws.String("https"),
+			}),
+		},
+	}
+
+	for _, c := range cases {
+		value := c.instanceInfo.Protocol()
+		if value != c.expected {
+			t.Fatalf("Should have been %s, got %s", c.expected, value)
+		}
+	}
+}
+
+func TestEcsHost(t *testing.T) {
+	cases := []struct {
+		expected     string
+		instanceInfo ecsInstance
+	}{
+		{
+			expected:     "10.0.0.0",
+			instanceInfo: simpleEcsInstance(map[string]*string{}),
+		},
+	}
+
+	for _, c := range cases {
+		value := c.instanceInfo.Host()
+		if value != c.expected {
+			t.Fatalf("Should have been %s, got %s", c.expected, value)
+		}
+	}
+}
+
+func TestEcsPort(t *testing.T) {
+	cases := []struct {
+		expected     string
+		instanceInfo ecsInstance
+	}{
+		{
+			expected:     "80",
+			instanceInfo: simpleEcsInstance(map[string]*string{}),
+		},
+	}
+
+	for _, c := range cases {
+		value := c.instanceInfo.Port()
+		if value != c.expected {
+			t.Fatalf("Should have been %s, got %s", c.expected, value)
+		}
+	}
+}
+
+func TestEcsWeight(t *testing.T) {
+	cases := []struct {
+		expected     string
+		instanceInfo ecsInstance
+	}{
+		{
+			expected:     "0",
+			instanceInfo: simpleEcsInstance(map[string]*string{}),
+		},
+		{
+			expected: "10",
+			instanceInfo: simpleEcsInstance(map[string]*string{
+				"traefik.weight": aws.String("10"),
+			}),
+		},
+	}
+
+	for _, c := range cases {
+		value := c.instanceInfo.Weight()
+		if value != c.expected {
+			t.Fatalf("Should have been %s, got %s", c.expected, value)
+		}
+	}
+}
+
+func TestEcsPassHostHeader(t *testing.T) {
+	cases := []struct {
+		expected     string
+		instanceInfo ecsInstance
+	}{
+		{
+			expected:     "true",
+			instanceInfo: simpleEcsInstance(map[string]*string{}),
+		},
+		{
+			expected: "false",
+			instanceInfo: simpleEcsInstance(map[string]*string{
+				"traefik.frontend.passHostHeader": aws.String("false"),
+			}),
+		},
+	}
+
+	for _, c := range cases {
+		value := c.instanceInfo.PassHostHeader()
+		if value != c.expected {
+			t.Fatalf("Should have been %s, got %s", c.expected, value)
+		}
+	}
+}
+
+func TestEcsPriority(t *testing.T) {
+	cases := []struct {
+		expected     string
+		instanceInfo ecsInstance
+	}{
+		{
+			expected:     "0",
+			instanceInfo: simpleEcsInstance(map[string]*string{}),
+		},
+		{
+			expected: "10",
+			instanceInfo: simpleEcsInstance(map[string]*string{
+				"traefik.frontend.priority": aws.String("10"),
+			}),
+		},
+	}
+
+	for _, c := range cases {
+		value := c.instanceInfo.Priority()
+		if value != c.expected {
+			t.Fatalf("Should have been %s, got %s", c.expected, value)
+		}
+	}
+}
+
+func TestEcsEntryPoints(t *testing.T) {
+	cases := []struct {
+		expected     []string
+		instanceInfo ecsInstance
+	}{
+		{
+			expected:     []string{},
+			instanceInfo: simpleEcsInstance(map[string]*string{}),
+		},
+		{
+			expected: []string{"http"},
+			instanceInfo: simpleEcsInstance(map[string]*string{
+				"traefik.frontend.entryPoints": aws.String("http"),
+			}),
+		},
+		{
+			expected: []string{"http", "https"},
+			instanceInfo: simpleEcsInstance(map[string]*string{
+				"traefik.frontend.entryPoints": aws.String("http,https"),
+			}),
+		},
+	}
+
+	for _, c := range cases {
+		value := c.instanceInfo.EntryPoints()
+		if !reflect.DeepEqual(value, c.expected) {
+			t.Fatalf("Should have been %s, got %s", c.expected, value)
+		}
+	}
+}

server.go

@@ -373,6 +373,9 @@ func (server *Server) configureProviders() {
 	if server.globalConfiguration.Eureka != nil {
 		server.providers = append(server.providers, server.globalConfiguration.Eureka)
 	}
+	if server.globalConfiguration.ECS != nil {
+		server.providers = append(server.providers, server.globalConfiguration.ECS)
+	}
 }
 
 func (server *Server) startProviders() {

templates/ecs.tmpl

@@ -0,0 +1,17 @@
+[backends]{{range .Instances}}
+    [backends.backend-{{ .Name }}.servers.server-{{ .Name }}{{ .ID }}]
+    url = "{{ .Protocol }}://{{ .Host }}:{{ .Port }}"
+    weight = {{ .Weight }}
+{{end}}
+
+[frontends]{{range filterFrontends .Instances}}
+  [frontends.frontend-{{ .Name }}]
+  backend = "backend-{{ .Name }}"
+  passHostHeader = {{ .PassHostHeader }}
+  priority = {{ .Priority }}
+  entryPoints = [{{range  .EntryPoints }}
+    "{{.}}",
+  {{end}}]
+    [frontends.frontend-{{ .Name }}.routes.route-frontend-{{ .Name }}]
+    rule = "{{getFrontendRule .}}"
+{{end}}

traefik.sample.toml

@@ -868,6 +868,67 @@
 # filename = "boltdb.tmpl"
 
 
+################################################################
+# ECS configuration backend
+################################################################
+
+# Enable ECS configuration backend
+#
+# Optional
+#
+# [ecs]
+
+# ECS Cluster Name
+#
+# Optional
+# Default: "default"
+#
+# Cluster = "default"
+
+# Enable watch ECS changes
+#
+# Optional
+# Default: true
+#
+# Watch = true
+
+# Polling interval (in seconds)
+#
+# Optional
+# Default: 15
+#
+# RefreshSeconds = 15
+
+# Expose ECS services by default in traefik
+#
+# Optional
+# Default: true
+#
+# ExposedByDefault = false
+
+# Region to use when connecting to AWS
+#
+# Optional
+#
+# Region = "us-east-1"
+
+# AccessKeyID to use when connecting to AWS
+#
+# Optional
+#
+# AccessKeyID = "abc"
+
+# SecretAccessKey to use when connecting to AWS
+#
+# Optional
+#
+# SecretAccessKey = "123"
+
+# Override default configuration template. For advanced users :)
+#
+# Optional
+#
+# filename = "ecs.tmpl"
 
 
 ################################################################