IP-per-task: (#841)

Support IP per task with marathon/mesos

glide.lock

@@ -1,5 +1,5 @@
-hash: 0801f9e0d663717d9cc81ee3440380d82d22a0af7dc00b078d812bd3e734c7f3
+hash: b45763571b0e62d44908c8c5088d9d596831f70cd3534b4ed7f8b7f62e37a38e
-updated: 2016-12-19T15:05:24.156719846+01:00
+updated: 2016-12-29T23:00:30.216963153-02:00
 imports:
 - name: github.com/abbot/go-http-auth
   version: cb4372376e1e00e9f6ab9ec142e029302c9e7140
@@ -35,11 +35,11 @@ imports:
   - private/waiter
   - service/route53
 - name: github.com/Azure/azure-sdk-for-go
-  version: 0984e0641ae43b89283223034574d6465be93bf4
+  version: 1620af6b32398bfc91827ceae54a8cc1f55df04d
   subpackages:
   - arm/dns
 - name: github.com/Azure/go-autorest
-  version: e0c77ecbe74311e03f2a629834d2110f031f1453
+  version: 32cc2321122a649b7ba4e323527bcb145134fd47
   subpackages:
   - autorest
   - autorest/azure
@@ -49,7 +49,7 @@ imports:
 - name: github.com/blang/semver
   version: 3a37c301dda64cbe17f16f661b4c976803c0e2d2
 - name: github.com/boltdb/bolt
-  version: f4c032d907f61f08dba2d719c58f108a1abb8e81
+  version: 5cc10bbbc5c141029940133bb33c9e969512a698
 - name: github.com/BurntSushi/toml
   version: 99064174e013895bbd9b025c31100bd1d9b590ca
 - name: github.com/BurntSushi/ty
@@ -63,7 +63,7 @@ imports:
 - name: github.com/codegangsta/cli
   version: bf4a526f48af7badd25d2cb02d587e1b01be3b50
 - name: github.com/codegangsta/negroni
-  version: 3f7ce7b928e14ff890b067e5bbbc80af73690a9c
+  version: dc6b9d037e8dab60cbfc09c61d6932537829be8b
 - name: github.com/containous/flaeg
   version: a731c034dda967333efce5f8d276aeff11f8ff87
 - name: github.com/containous/mux
@@ -79,7 +79,7 @@ imports:
   - pkg/pathutil
   - pkg/types
 - name: github.com/coreos/go-oidc
-  version: dedb650fb29c39c2f21aa88c1e4cec66da8754d1
+  version: 9e117111587506b9dc83b7b38263268bf48352ea
   subpackages:
   - http
   - jose
@@ -108,7 +108,7 @@ imports:
 - name: github.com/dgrijalva/jwt-go
   version: 9ed569b5d1ac936e6494082958d63a6aa4fff99a
 - name: github.com/docker/distribution
-  version: 99cb7c0946d2f5a38015443e515dc916295064d7
+  version: 87917f30529e6a7fca8eaff2932424915fb11225
   subpackages:
   - context
   - digest
@@ -188,7 +188,7 @@ imports:
   - types/time
   - types/versions
 - name: github.com/docker/go-connections
-  version: 988efe982fdecb46f01d53465878ff1f2ff411ce
+  version: 990a1a1a70b0da4c4cb70e117971a4f0babfbf1a
   subpackages:
   - nat
   - sockets
@@ -196,9 +196,9 @@ imports:
 - name: github.com/docker/go-units
   version: f2d77a61e3c169b43402a0a1e84f06daf29b8190
 - name: github.com/docker/leadership
-  version: 0a913e2d71a12fd14a028452435cb71ac8d82cb6
+  version: bfc7753dd48af19513b29deec23c364bf0f274eb
 - name: github.com/docker/libkv
-  version: 3fce6a0f26e07da3eac45796a8e255547a47a750
+  version: 35d3e2084c650109e7bcc7282655b1bc8ba924ff
   subpackages:
   - store
   - store/boltdb
@@ -216,26 +216,26 @@ imports:
   - tokens
   - zones
 - name: github.com/elazarl/go-bindata-assetfs
-  version: 9a6736ed45b44bf3835afeebb3034b57ed329f3e
+  version: 57eb5e1fc594ad4b0b1dbea7b286d299e0cb43c2
 - name: github.com/emicklei/go-restful
   version: 892402ba11a2e2fd5e1295dd633481f27365f14d
   subpackages:
   - log
   - swagger
 - name: github.com/gambol99/go-marathon
-  version: a558128c87724cd7430060ef5aedf39f83937f55
+  version: 9ab64d9f0259e8800911d92ebcd4d5b981917919
 - name: github.com/ghodss/yaml
-  version: a54de18a07046d8c4b26e9327698a2ebb9285b36
+  version: 04f313413ffd65ce25f2541bfd2b2ceec5c0908c
 - name: github.com/go-ini/ini
-  version: 2ba15ac2dc9cdf88c110ec2dc0ced7fa45f5678c
+  version: 6f66b0e091edb3c7b380f7c4f0f884274d550b67
 - name: github.com/go-openapi/jsonpointer
   version: 8d96a2dc61536b690bd36b2e9df0b3c0b62825b2
 - name: github.com/go-openapi/jsonreference
   version: 36d33bfe519efae5632669801b180bf1a245da3b
 - name: github.com/go-openapi/spec
-  version: f7ae86df5bc115a2744343016c789a89f065a4bd
+  version: 34b5ffff717ab4535aef76e3dd90818bddde571b
 - name: github.com/go-openapi/swag
-  version: 3b6d86cd965820f968760d5d419cb4add096bdd7
+  version: 96d7b9ebd181a1735a1c9ac87914f2b32fbf56c9
 - name: github.com/gogo/protobuf
   version: 909568be09de550ed094403c2bf8a261b5bb730a
   subpackages:
@@ -248,7 +248,7 @@ imports:
   subpackages:
   - proto
 - name: github.com/google/go-github
-  version: 55263f30529cb06f5b478efc333390b791cfe3b1
+  version: c8ebe3a4d7f0791a6315b7410353d4084c58805d
   subpackages:
   - github
 - name: github.com/google/go-querystring
@@ -258,21 +258,22 @@ imports:
 - name: github.com/google/gofuzz
   version: 44d81051d367757e1c7c6a5a86423ece9afcf63c
 - name: github.com/gorilla/context
-  version: 08b5f424b9271eedf6f9f0ce86cb9396ed337a42
+  version: 1ea25387ff6f684839d82767c1733ff4d4d15d0a
 - name: github.com/hashicorp/consul
-  version: d8e2fb7dd594163e25a89bc52c1a4613f5c5bfb8
+  version: fce7d75609a04eeb9d4bf41c8dc592aac18fc97d
   subpackages:
   - api
 - name: github.com/hashicorp/go-cleanhttp
-  version: ad28ea4487f05916463e2423a55166280e8254b5
+  version: 875fb671b3ddc66f8e2f0acc33829c8cb989a38d
 - name: github.com/hashicorp/go-version
   version: e96d3840402619007766590ecea8dd7af1292276
 - name: github.com/hashicorp/serf
-  version: b03bf85930b2349eb04b97c8fac437495296e3e7
+  version: 6c4672d66fc6312ddde18399262943e21175d831
   subpackages:
   - coordinate
+  - serf
 - name: github.com/JamesClonk/vultr
-  version: a798a2e08fafd0594d113fc6123e5c147bd66213
+  version: 9ec0427d51411407c0402b093a1771cb75af9679
   subpackages:
   - lib
 - name: github.com/jarcoal/httpmock
@@ -288,7 +289,7 @@ imports:
 - name: github.com/mailgun/timetools
   version: fd192d755b00c968d312d23f521eb0cdc6f66bd0
 - name: github.com/mailru/easyjson
-  version: 159cdb893c982e3d1bc6450322fedd514f9c9de3
+  version: 9d6630dc8c577b56cb9687a9cf9e8578aca7298a
   subpackages:
   - buffer
   - jlexer
@@ -324,23 +325,23 @@ imports:
 - name: github.com/mitchellh/mapstructure
   version: f3009df150dadf309fdee4a54ed65c124afad715
 - name: github.com/mvdan/xurls
-  version: de85a6f607af2e645cce05905efd9420e43b91f1
+  version: fa08908f19eca8c491d68c6bd8b4b44faea6daf8
 - name: github.com/NYTimes/gziphandler
   version: f6438dbf4a82c56684964b03956aa727b0d7816b
 - name: github.com/ogier/pflag
   version: 45c278ab3607870051a2ea9040bb85fcb8557481
 - name: github.com/opencontainers/runc
-  version: 02f8fa7863dd3f82909a73e2061897828460d52f
+  version: 1a81e9ab1f138c091fe5c86d0883f87716088527
   subpackages:
   - libcontainer/user
 - name: github.com/ovh/go-ovh
-  version: 99a1e00db4397517d87ab82c92b9d8cb60e5940b
+  version: a8a4c0bc40e56322142649bda7b2b4bb15145b6e
   subpackages:
   - ovh
 - name: github.com/parnurzeal/gorequest
-  version: e30af16d4e485943aab0b0885ad6bdbb8c0d3dc7
+  version: 045012d33ef41ea146c1b675df9296d0dc1a212d
 - name: github.com/pborman/uuid
-  version: 3d4f2ba23642d3cfd06bd4b54cf03d99d95c0f1b
+  version: 5007efa264d92316c43112bc573e754bc889b7b1
 - name: github.com/pmezard/go-difflib
   version: d8ed2627bdf02c080bf22230dbb337003b7aba2d
   subpackages:
@@ -356,26 +357,26 @@ imports:
 - name: github.com/ryanuber/go-glob
   version: 572520ed46dbddaed19ea3d9541bdd0494163693
 - name: github.com/samuel/go-zookeeper
-  version: 87e1bca4477a3cc767ca71be023ced183d74e538
+  version: e64db453f3512cade908163702045e0f31137843
   subpackages:
   - zk
 - name: github.com/satori/go.uuid
   version: 879c5887cd475cd7864858769793b2ceb0d44feb
 - name: github.com/Sirupsen/logrus
-  version: 3ec0642a7fb6488f65b06f9040adc67e3990296a
+  version: a283a10442df8dc09befd873fab202bf8a253d6a
 - name: github.com/spf13/pflag
   version: 5644820622454e71517561946e3d94b9f9db6842
 - name: github.com/streamrail/concurrent-map
-  version: 8bf1e9bacbf65b10c81d0f4314cf2b1ebef728b5
+  version: 65a174a3a4188c0b7099acbc6cfa0c53628d3287
 - name: github.com/stretchr/objx
   version: cbeaeb16a013161a98496fad62933b1d21786672
 - name: github.com/stretchr/testify
-  version: 976c720a22c8eb4eb6a0b4348ad85ad12491a506
+  version: 69483b4bd14f5845b5a1e55bca19e954e827f1d0
   subpackages:
   - assert
   - mock
 - name: github.com/thoas/stats
-  version: 152b5d051953fdb6e45f14b6826962aadc032324
+  version: 79b768ff1780f4e5b0ed132e192bfeefe9f85a9c
 - name: github.com/timewasted/linode
   version: 37e84520dcf74488f67654f9c775b9752c232dc1
   subpackages:
@@ -387,9 +388,9 @@ imports:
   subpackages:
   - codec
 - name: github.com/unrolled/render
-  version: 526faf80cd4b305bb8134abea8d20d5ced74faa6
+  version: 198ad4d8b8a4612176b804ca10555b222a086b40
 - name: github.com/urfave/negroni
-  version: e0e50f7dc431c043cb33f91b09c3419d48b7cff5
+  version: fde5e16d32adc7ad637e9cd9ad21d4ebc6192535
 - name: github.com/vdemeester/docker-events
   version: be74d4929ec1ad118df54349fda4b0cba60f849b
 - name: github.com/vulcand/oxy
@@ -420,7 +421,7 @@ imports:
   subpackages:
   - dnsimple
 - name: github.com/xenolf/lego
-  version: cbd5d04c891979c23c3924f198e07ce32b39d282
+  version: ce8fb060cb8361a9ff8b5fb7c2347fa907b6fcac
   subpackages:
   - acme
   - providers/dns
@@ -474,7 +475,7 @@ imports:
   - unix
   - windows
 - name: golang.org/x/text
-  version: 5c6cf4f9a2357d38515014cea8c488ed22bdab90
+  version: a49bea13b776691cb1b49873e5d8df96ec74831a
   repo: https://github.com/golang/text.git
   vcs: git
   subpackages:
@@ -507,13 +508,13 @@ imports:
   - compute/metadata
   - internal
 - name: gopkg.in/fsnotify.v1
-  version: 944cff21b3baf3ced9a880365682152ba577d348
+  version: a8a77c9133d2d6fd8334f3260d06f60e8d80a5fb
 - name: gopkg.in/inf.v0
   version: 3887ee99ecf07df5b447e9b00d9c0b2adaa9f3e4
 - name: gopkg.in/ini.v1
-  version: 6e4869b434bd001f6983749881c7ead3545887d8
+  version: 6f66b0e091edb3c7b380f7c4f0f884274d550b67
 - name: gopkg.in/mgo.v2
-  version: 22287bab4379e1fbf6002fb4eb769888f3fb224c
+  version: 29cc868a5ca65f401ff318143f9408d02f4799cc
   subpackages:
   - bson
 - name: gopkg.in/ns1/ns1-go.v2
@@ -526,7 +527,7 @@ imports:
   - rest/model/filter
   - rest/model/monitor
 - name: gopkg.in/square/go-jose.v1
-  version: aa2e30fdd1fe9dd3394119af66451ae790d50e0d
+  version: e3f973b66b91445ec816dd7411ad1b6495a5a2fc
   subpackages:
   - cipher
   - json
@@ -665,7 +666,7 @@ testImports:
 - name: github.com/flynn/go-shlex
   version: 3f9db97f856818214da2e1057f8ad84803971cff
 - name: github.com/go-check/check
-  version: 4f90aeace3a26ad7021961c297b22c42160c7b25
+  version: 11d3bc7aa68e238947792f30573146a3231fc0f1
 - name: github.com/gorilla/mux
   version: e444e69cbd2e2e3e0749a2f3c717cec491552bbf
 - name: github.com/libkermit/compose
@@ -677,7 +678,7 @@ testImports:
 - name: github.com/libkermit/docker-check
   version: cbe0ef03b3d23070eac4d00ba8828f2cc7f7e5a3
 - name: github.com/vbatts/tar-split
-  version: bd4c5d64c3e9297f410025a3b1bd0c58f659e721
+  version: 6810cedb21b2c3d0b9bb8f9af12ff2dc7a2f14df
   subpackages:
   - archive/tar
   - tar/asm

glide.yaml

@@ -43,8 +43,6 @@ import:
   - store/etcd
   - store/zookeeper
 - package: github.com/elazarl/go-bindata-assetfs
-- package: github.com/gambol99/go-marathon
-  version: a558128c87724cd7430060ef5aedf39f83937f55
 - package: github.com/containous/mux
 - package: github.com/hashicorp/consul
   subpackages:
@@ -64,7 +62,7 @@ import:
   subpackages:
   - plugin/rewrite
 - package: github.com/xenolf/lego
-  version: cbd5d04c891979c23c3924f198e07ce32b39d282
+  version: ce8fb060cb8361a9ff8b5fb7c2347fa907b6fcac 
   subpackages:
   - acme
 - package: golang.org/x/net
@@ -100,6 +98,8 @@ import:
   version: ^1.1.0
 - package: k8s.io/client-go
   version: ^v1.5.0
+- package: github.com/gambol99/go-marathon
+  version: ^0.5.1
 - package: github.com/gogo/protobuf
   version: 0.3
 - package: github.com/ArthurHlt/go-eureka-client
@@ -113,4 +113,4 @@ import:
   - daemon
 - package: github.com/google/go-github
 - package: github.com/hashicorp/go-version
-- package: github.com/mvdan/xurls
+- package: github.com/mvdan/xurls

mocks/Marathon.go

@@ -147,7 +147,7 @@ func (_m *Marathon) CreateApplication(application *marathon.Application) (*marat
 }
 
 // DeleteApplication provides a mock function with given fields: name
-func (_m *Marathon) DeleteApplication(name string) (*marathon.DeploymentID, error) {
+func (_m *Marathon) DeleteApplication(name string, force bool) (*marathon.DeploymentID, error) {
 	ret := _m.Called(name)
 
 	var r0 *marathon.DeploymentID
@@ -534,7 +534,7 @@ func (_m *Marathon) CreateGroup(group *marathon.Group) error {
 }
 
 // DeleteGroup provides a mock function with given fields: name
-func (_m *Marathon) DeleteGroup(name string) (*marathon.DeploymentID, error) {
+func (_m *Marathon) DeleteGroup(name string, force bool) (*marathon.DeploymentID, error) {
 	ret := _m.Called(name)
 
 	var r0 *marathon.DeploymentID
@@ -557,7 +557,7 @@ func (_m *Marathon) DeleteGroup(name string) (*marathon.DeploymentID, error) {
 }
 
 // UpdateGroup provides a mock function with given fields: id, group
-func (_m *Marathon) UpdateGroup(id string, group *marathon.Group) (*marathon.DeploymentID, error) {
+func (_m *Marathon) UpdateGroup(id string, group *marathon.Group, force bool) (*marathon.DeploymentID, error) {
 	ret := _m.Called(id, group)
 
 	var r0 *marathon.DeploymentID
@@ -719,17 +719,18 @@ func (_m *Marathon) Subscriptions() (*marathon.Subscriptions, error) {
 }
 
 // AddEventsListener provides a mock function with given fields: channel, filter
-func (_m *Marathon) AddEventsListener(channel marathon.EventsChannel, filter int) error {
+func (_m *Marathon) AddEventsListener(filter int) (marathon.EventsChannel, error) {
-	ret := _m.Called(channel, filter)
+	update := make(marathon.EventsChannel, 5)
+	ret := _m.Called(update, filter)
 
 	var r0 error
 	if rf, ok := ret.Get(0).(func(marathon.EventsChannel, int) error); ok {
-		r0 = rf(channel, filter)
+		r0 = rf(update, filter)
 	} else {
 		r0 = ret.Error(0)
 	}
 
-	return r0
+	return update, r0
 }
 
 // RemoveEventsListener provides a mock function with given fields: channel
@@ -850,3 +851,33 @@ func (_m *Marathon) AbdicateLeader() (string, error) {
 
 	return r0, r1
 }
+
+// ApplicationBy mocks the marathon client function but does nothing
+func (_m *Marathon) ApplicationBy(name string, opts *marathon.GetAppOpts) (*marathon.Application, error) {
+	return nil, nil
+}
+
+// Subscribe mocks the marathon client function but does nothing
+func (_m *Marathon) Subscribe(string) error {
+	return nil
+}
+
+// Queue mocks the marathon client function but does nothing
+func (_m *Marathon) Queue() (*marathon.Queue, error) {
+	return nil, nil
+}
+
+// DeleteQueueDelay mocks the marathon client function but does nothing
+func (_m *Marathon) DeleteQueueDelay(appID string) error {
+	return nil
+}
+
+// GroupsBy mocks the marathon client function but does nothing
+func (_m *Marathon) GroupsBy(opts *marathon.GetGroupOpts) (*marathon.Groups, error) {
+	return nil, nil
+}
+
+// GroupBy mocks the marathon client function but does nothing
+func (_m *Marathon) GroupBy(name string, opts *marathon.GetGroupOpts) (*marathon.Group, error) {
+	return nil, nil
+}

provider/marathon.go

@@ -83,9 +83,10 @@ func (provider *Marathon) Provide(configurationChan chan<- types.ConfigMessage,
 			return err
 		}
 		provider.marathonClient = client
-		update := make(marathon.EventsChannel, 5)
+
 		if provider.Watch {
-			if err := client.AddEventsListener(update, marathon.EventIDApplications); err != nil {
+			update, err := client.AddEventsListener(marathon.EventIDApplications)
+			if err != nil {
 				log.Errorf("Failed to register for events, %s", err)
 				return err
 			}
@@ -129,6 +130,7 @@ func (provider *Marathon) Provide(configurationChan chan<- types.ConfigMessage,
 func (provider *Marathon) loadMarathonConfig() *types.Configuration {
 	var MarathonFuncMap = template.FuncMap{
 		"getBackend":                  provider.getBackend,
+		"getBackendServer":            provider.getBackendServer,
 		"getPort":                     provider.getPort,
 		"getWeight":                   provider.getWeight,
 		"getDomain":                   provider.getDomain,
@@ -188,15 +190,16 @@ func (provider *Marathon) loadMarathonConfig() *types.Configuration {
 }
 
 func (provider *Marathon) taskFilter(task marathon.Task, applications *marathon.Applications, exposedByDefaultFlag bool) bool {
-	if len(task.Ports) == 0 {
-		log.Debug("Filtering marathon task without port %s", task.AppID)
-		return false
-	}
 	application, err := getApplication(task, applications.Apps)
 	if err != nil {
 		log.Errorf("Unable to get marathon application from task %s", task.AppID)
 		return false
 	}
+	ports := processPorts(application, task)
+	if len(ports) == 0 {
+		log.Debug("Filtering marathon task without port %s", task.AppID)
+		return false
+	}
 	label, _ := provider.getLabel(application, "traefik.tags")
 	constraintTags := strings.Split(label, ",")
 	if provider.MarathonLBCompatibility {
@@ -223,10 +226,9 @@ func (provider *Marathon) taskFilter(task marathon.Task, applications *marathon.
 		log.Debugf("Filtering marathon task %s specifying both traefik.portIndex and traefik.port labels", task.AppID)
 		return false
 	}
-
 	if portIndexLabel != "" {
 		index, err := strconv.Atoi((*application.Labels)["traefik.portIndex"])
-		if err != nil || index < 0 || index > len(application.Ports)-1 {
+		if err != nil || index < 0 || index > len(ports)-1 {
 			log.Debugf("Filtering marathon task %s with unexpected value for traefik.portIndex label", task.AppID)
 			return false
 		}
@@ -239,7 +241,7 @@ func (provider *Marathon) taskFilter(task marathon.Task, applications *marathon.
 		}
 
 		var foundPort bool
-		for _, exposedPort := range task.Ports {
+		for _, exposedPort := range ports {
 			if port == exposedPort {
 				foundPort = true
 				break
@@ -315,17 +317,17 @@ func (provider *Marathon) getPort(task marathon.Task, applications []marathon.Ap
 		log.Errorf("Unable to get marathon application from task %s", task.AppID)
 		return ""
 	}
-
+	ports := processPorts(application, task)
 	if portIndexLabel, err := provider.getLabel(application, "traefik.portIndex"); err == nil {
 		if index, err := strconv.Atoi(portIndexLabel); err == nil {
-			return strconv.Itoa(task.Ports[index])
+			return strconv.Itoa(ports[index])
 		}
 	}
 	if portValueLabel, err := provider.getLabel(application, "traefik.port"); err == nil {
 		return portValueLabel
 	}
 
-	for _, port := range task.Ports {
+	for _, port := range ports {
 		return strconv.Itoa(port)
 	}
 	return ""
@@ -488,3 +490,62 @@ func (provider *Marathon) getCircuitBreakerExpression(application marathon.Appli
 	}
 	return "NetworkErrorRatio() > 1"
 }
+
+func processPorts(application marathon.Application, task marathon.Task) []int {
+
+	// First using application ports
+	if len(application.Ports) > 0 {
+		return application.Ports
+	}
+
+	// Using default port configuration
+	if task.Ports != nil && len(task.Ports) > 0 {
+		return task.Ports
+	}
+
+	// Using port definition if available
+	if application.PortDefinitions != nil && len(*application.PortDefinitions) > 0 {
+		ports := make([]int, 0)
+		for _, def := range *application.PortDefinitions {
+			if def.Port != nil {
+				ports = append(ports, *def.Port)
+			}
+		}
+		return ports
+	}
+	// If using IP-per-task using this port definition
+	if application.IPAddressPerTask != nil && len(*((*application.IPAddressPerTask).Discovery).Ports) > 0 {
+		ports := make([]int, 0)
+		for _, def := range *((*application.IPAddressPerTask).Discovery).Ports {
+			ports = append(ports, def.Number)
+		}
+		return ports
+	}
+
+	return []int{}
+}
+
+func (provider *Marathon) getBackendServer(task marathon.Task, applications []marathon.Application) string {
+	application, err := getApplication(task, applications)
+	if err != nil {
+		log.Errorf("Unable to get marathon application from task %s", task.AppID)
+		return ""
+	}
+	if len(task.IPAddresses) == 0 {
+		return ""
+	} else if len(task.IPAddresses) == 1 {
+		return task.IPAddresses[0].IPAddress
+	} else {
+		ipAddressIdxStr, err := provider.getLabel(application, "traefik.ipAddressIdx")
+		if err != nil {
+			log.Errorf("Unable to get marathon IPAddress from task %s", task.AppID)
+			return ""
+		}
+		ipAddressIdx, err := strconv.Atoi(ipAddressIdxStr)
+		if err != nil {
+			log.Errorf("Invalid marathon IPAddress from task %s", task.AppID)
+			return ""
+		}
+		return task.IPAddresses[ipAddressIdx].IPAddress
+	}
+}

provider/marathon_test.go

@@ -80,8 +80,14 @@ func TestMarathonLoadConfig(t *testing.T) {
 					{
 						ID:    "test",
 						AppID: "/test",
-						Host:  "127.0.0.1",
+						Host:  "localhost",
 						Ports: []int{80},
+						IPAddresses: []*marathon.IPAddress{
+							{
+								IPAddress: "127.0.0.1",
+								Protocol:  "tcp",
+							},
+						},
 					},
 				},
 			},
@@ -127,8 +133,14 @@ func TestMarathonLoadConfig(t *testing.T) {
 					{
 						ID:    "testLoadBalancerAndCircuitBreaker.dot",
 						AppID: "/testLoadBalancerAndCircuitBreaker.dot",
-						Host:  "127.0.0.1",
+						Host:  "localhost",
 						Ports: []int{80},
+						IPAddresses: []*marathon.IPAddress{
+							{
+								IPAddress: "127.0.0.1",
+								Protocol:  "tcp",
+							},
+						},
 					},
 				},
 			},
@@ -179,8 +191,14 @@ func TestMarathonLoadConfig(t *testing.T) {
 					{
 						ID:    "testMaxConn",
 						AppID: "/testMaxConn",
-						Host:  "127.0.0.1",
+						Host:  "localhost",
 						Ports: []int{80},
+						IPAddresses: []*marathon.IPAddress{
+							{
+								IPAddress: "127.0.0.1",
+								Protocol:  "tcp",
+							},
+						},
 					},
 				},
 			},
@@ -228,8 +246,14 @@ func TestMarathonLoadConfig(t *testing.T) {
 					{
 						ID:    "testMaxConnOnlySpecifyAmount",
 						AppID: "/testMaxConnOnlySpecifyAmount",
-						Host:  "127.0.0.1",
+						Host:  "localhost",
 						Ports: []int{80},
+						IPAddresses: []*marathon.IPAddress{
+							{
+								IPAddress: "127.0.0.1",
+								Protocol:  "tcp",
+							},
+						},
 					},
 				},
 			},
@@ -274,8 +298,14 @@ func TestMarathonLoadConfig(t *testing.T) {
 					{
 						ID:    "testMaxConnOnlyExtractorFunc",
 						AppID: "/testMaxConnOnlyExtractorFunc",
-						Host:  "127.0.0.1",
+						Host:  "localhost",
 						Ports: []int{80},
+						IPAddresses: []*marathon.IPAddress{
+							{
+								IPAddress: "127.0.0.1",
+								Protocol:  "tcp",
+							},
+						},
 					},
 				},
 			},
@@ -387,7 +417,89 @@ func TestMarathonTaskFilter(t *testing.T) {
 		},
 		{
 			task: marathon.Task{
-				AppID: "disable",
+				AppID: "ipAddressOnePort",
+			},
+			applications: &marathon.Applications{
+				Apps: []marathon.Application{
+					{
+						ID: "ipAddressOnePort",
+						IPAddressPerTask: &marathon.IPAddressPerTask{
+							Discovery: &marathon.Discovery{
+								Ports: &[]marathon.Port{
+									{
+										Number: 8880,
+										Name:   "p1",
+									},
+								},
+							},
+						},
+						Labels: &map[string]string{},
+					},
+				},
+			},
+			expected:         true,
+			exposedByDefault: true,
+		},
+		{
+			task: marathon.Task{
+				AppID: "ipAddressTwoPortsUseFirst",
+			},
+			applications: &marathon.Applications{
+				Apps: []marathon.Application{
+					{
+						ID: "ipAddressTwoPortsUseFirst",
+						IPAddressPerTask: &marathon.IPAddressPerTask{
+							Discovery: &marathon.Discovery{
+								Ports: &[]marathon.Port{
+									{
+										Number: 8898,
+										Name:   "p1",
+									}, {
+										Number: 9999,
+										Name:   "p1",
+									},
+								},
+							},
+						},
+						Labels: &map[string]string{},
+					},
+				},
+			},
+			expected:         true,
+			exposedByDefault: true,
+		},
+		{
+			task: marathon.Task{
+				AppID: "ipAddressValidTwoPorts",
+			},
+			applications: &marathon.Applications{
+				Apps: []marathon.Application{
+					{
+						ID: "ipAddressValidTwoPorts",
+						IPAddressPerTask: &marathon.IPAddressPerTask{
+							Discovery: &marathon.Discovery{
+								Ports: &[]marathon.Port{
+									{
+										Number: 8898,
+										Name:   "p1",
+									}, {
+										Number: 9999,
+										Name:   "p2",
+									},
+								},
+							},
+						},
+						Labels: &map[string]string{
+							"traefik.portIndex": "0",
+						},
+					},
+				},
+			},
+			expected:         true,
+			exposedByDefault: true,
+		},
+		{
+			task: marathon.Task{
 				Ports: []int{80},
 			},
 			applications: &marathon.Applications{

templates/marathon.tmpl

@@ -1,7 +1,7 @@
 {{$apps := .Applications}}
 [backends]{{range .Tasks}}
     [backends."backend{{getBackend . $apps}}".servers."server-{{.ID | replace "." "-"}}"]
-    url = "{{getProtocol . $apps}}://{{.Host}}:{{getPort . $apps}}"
+    url = "{{getProtocol . $apps}}://{{getBackendServer . $apps}}:{{getPort . $apps}}"
     weight = {{getWeight . $apps}}
 {{end}}