Consul Backend

.gitignore

@@ -3,3 +3,4 @@ gen.go
 .idea
 log
 *.iml
+./traefik

configuration.go

@@ -12,6 +12,7 @@ type GlobalConfiguration struct {
 	File              *FileProvider
 	Web               *WebProvider
 	Marathon          *MarathonProvider
+	Consul            *ConsulProvider
 }
 
 func NewGlobalConfiguration() *GlobalConfiguration {

consul.go

@@ -0,0 +1,155 @@
+package main
+
+import (
+	"github.com/hashicorp/consul/api"
+	"text/template"
+	"bytes"
+	"github.com/BurntSushi/toml"
+	"strings"
+	"github.com/BurntSushi/ty/fun"
+	"net/http"
+)
+
+
+type Key struct {
+	Value string
+}
+
+type ConsulProvider struct {
+	Watch        bool
+	Endpoint     string
+	Prefix       string
+	Filename     string
+	consulClient *api.Client
+}
+var kvClient *api.KV
+
+var ConsulFuncMap = template.FuncMap{
+	"List": func(keys ...string) []string {
+		joinedKeys := strings.Join(keys, "")
+		keysPairs, _, err := kvClient.Keys(joinedKeys, "/", nil)
+		if err != nil {
+			log.Error("Error getting keys ", joinedKeys, err)
+			return nil
+		}
+		keysPairs = fun.Filter(func(key string) bool {
+			if (key == joinedKeys) {
+				return false
+			}
+			return true
+		}, keysPairs).([]string)
+		return keysPairs
+	},
+	"Get": func(keys ...string) string {
+		joinedKeys := strings.Join(keys, "")
+		keyPair, _, err := kvClient.Get(joinedKeys, nil)
+		if err != nil {
+			log.Error("Error getting key ", joinedKeys, err)
+			return ""
+		}
+		return string(keyPair.Value)
+	},
+	"Last": func(key string) string {
+		splittedKey := strings.Split(key, "/")
+		return splittedKey[len(splittedKey) -2]
+	},
+}
+
+func NewConsulProvider() *ConsulProvider {
+	consulProvider := new(ConsulProvider)
+	// default values
+	consulProvider.Watch = true
+	consulProvider.Prefix = "traefik"
+
+	return consulProvider
+}
+
+func (provider *ConsulProvider) Provide(configurationChan chan <- *Configuration) {
+	config := &api.Config{
+		Address:    provider.Endpoint,
+		Scheme:     "http",
+		HttpClient: http.DefaultClient,
+	}
+	consulClient, _ := api.NewClient(config)
+	provider.consulClient = consulClient
+	if provider.Watch {
+		var waitIndex uint64
+		keypairs, meta, err := consulClient.KV().Keys("", "", nil)
+		if keypairs == nil && err == nil {
+			log.Error("Key was not found.")
+		}
+		waitIndex = meta.LastIndex
+		go func() {
+			for {
+				opts := api.QueryOptions{
+					WaitIndex: waitIndex,
+				}
+				keypairs, meta, err := consulClient.KV().Keys("", "", &opts)
+				if keypairs == nil && err == nil {
+					log.Error("Key  was not found.")
+				}
+				waitIndex = meta.LastIndex
+				configuration := provider.loadConsulConfig()
+				if configuration != nil {
+					configurationChan <- configuration
+				}
+			}
+		}()
+	}
+	configuration := provider.loadConsulConfig()
+	configurationChan <- configuration
+}
+
+func (provider *ConsulProvider) loadConsulConfig() *Configuration {
+	configuration := new(Configuration)
+	services := []*api.CatalogService{}
+	kvClient = provider.consulClient.KV()
+
+	servicesName, _, _ := provider.consulClient.Catalog().Services(nil)
+	for serviceName, _ := range servicesName {
+		catalogServices, _, _ := provider.consulClient.Catalog().Service(serviceName, "", nil)
+		for _, catalogService := range catalogServices {
+			services= append(services, catalogService)
+		}
+	}
+
+	templateObjects := struct {
+		Services []*api.CatalogService
+	}{
+		services,
+	}
+
+	tmpl := template.New(provider.Filename).Funcs(ConsulFuncMap)
+	if len(provider.Filename) > 0 {
+		_, err := tmpl.ParseFiles(provider.Filename)
+		if err != nil {
+			log.Error("Error reading file", err)
+			return nil
+		}
+	} else {
+		buf, err := Asset("providerTemplates/consul.tmpl")
+		if err != nil {
+			log.Error("Error reading file", err)
+		}
+		_, err = tmpl.Parse(string(buf))
+		if err != nil {
+			log.Error("Error reading file", err)
+			return nil
+		}
+	}
+
+	var buffer bytes.Buffer
+
+	err := tmpl.Execute(&buffer, templateObjects)
+	if err != nil {
+		log.Error("Error with consul template:", err)
+		return nil
+	}
+
+	if _, err := toml.Decode(buffer.String(), configuration); err != nil {
+		log.Error("Error creating consul configuration:", err)
+		return nil
+	}
+
+	return configuration
+}

docker.go

@@ -7,7 +7,6 @@ import (
 	"github.com/BurntSushi/ty/fun"
 	"github.com/cenkalti/backoff"
 	"github.com/fsouza/go-dockerclient"
-	"github.com/leekchan/gtf"
 	"strconv"
 	"strings"
 	"text/template"
@@ -73,8 +72,8 @@ func (provider *DockerProvider) Provide(configurationChan chan<- *Configuration)
 			log.Fatalf("Docker connection error %+v", err)
 		}
 		log.Debug("Docker connection established")
-		dockerEvents := make(chan *docker.APIEvents)
 		if provider.Watch {
+			dockerEvents := make(chan *docker.APIEvents)
 			dockerClient.AddEventListener(dockerEvents)
 			log.Debug("Docker listening")
 			go func() {
@@ -152,7 +151,6 @@ func (provider *DockerProvider) loadDockerConfig(dockerClient *docker.Client) *C
 		hosts,
 		provider.Domain,
 	}
-	gtf.Inject(DockerFuncMap)
 	tmpl := template.New(provider.Filename).Funcs(DockerFuncMap)
 	if len(provider.Filename) > 0 {
 		_, err := tmpl.ParseFiles(provider.Filename)

marathon.go

@@ -5,7 +5,6 @@ import (
 	"github.com/BurntSushi/toml"
 	"github.com/BurntSushi/ty/fun"
 	"github.com/gambol99/go-marathon"
-	"github.com/leekchan/gtf"
 	"strconv"
 	"strings"
 	"text/template"
@@ -148,8 +147,7 @@ func (provider *MarathonProvider) loadMarathonConfig() *Configuration {
 		provider.Domain,
 	}
 
-	gtf.Inject(MarathonFuncMap)
+	tmpl := template.New(provider.Filename).Funcs(MarathonFuncMap)
-	tmpl := template.New(provider.Filename).Funcs(DockerFuncMap)
 	if len(provider.Filename) > 0 {
 		_, err := tmpl.ParseFiles(provider.Filename)
 		if err != nil {

providerTemplates/consul.tmpl

@@ -0,0 +1,24 @@
+{{$frontends := "frontends/" | List }}
+{{$backends := "backends/" | List }}
+
+{{range $backends}}
+{{$backend := .}}
+{{$servers := "servers/" | List $backend }}
+{{range $servers}}
+[backends.{{Last $backend}}.servers.{{Last .}}]
+    url = "{{Get . "/url"}}"
+    weight = {{Get . "/weight"}}
+{{end}}
+{{end}}
+
+[frontends]{{range $frontends}}
+  {{$frontend := Last .}}
+  [frontends.{{$frontend}}]
+  backend = "{{Get . "/backend"}}"
+  {{$routes := "routes/" | List .}}
+    {{range $routes}}
+    [frontends.{{$frontend}}.routes.{{Last .}}]
+    rule = "{{Get . "/rule"}}"
+    value = "{{Get . "/value"}}"
+    {{end}}
+{{end}}

tests/compose-consul.yml

@@ -0,0 +1,21 @@
+consul:
+  image: progrium/consul
+  command: -server -bootstrap -advertise 12.0.0.254 -log-level debug -ui-dir /ui
+  ports:
+    - "8400:8400"
+    - "8500:8500"
+    - "8600:53/udp"
+  expose:
+    - "8300"
+    - "8301"
+    - "8301/udp"
+    - "8302"
+    - "8302/udp"
+
+registrator:
+  image: gliderlabs/registrator:master
+  command: -internal consulkv://consul:8500/traefik
+  volumes:
+    - /var/run/docker.sock:/tmp/docker.sock
+  links:
+    - consul

tests/compose-marathon.yml

@@ -0,0 +1,42 @@
+zk:
+  image: bobrik/zookeeper
+  net: host
+  environment:
+    ZK_CONFIG: tickTime=2000,initLimit=10,syncLimit=5,maxClientCnxns=128,forceSync=no,clientPort=2181
+    ZK_ID: 1
+
+master:
+  image: mesosphere/mesos-master:0.23.0-1.0.ubuntu1404
+  net: host
+  environment:
+    MESOS_ZK: zk://127.0.0.1:2181/mesos
+    MESOS_HOSTNAME: 127.0.0.1
+    MESOS_IP: 127.0.0.1
+    MESOS_QUORUM: 1
+    MESOS_CLUSTER: docker-compose
+    MESOS_WORK_DIR: /var/lib/mesos
+
+slave:
+  image: mesosphere/mesos-slave:0.23.0-1.0.ubuntu1404
+  net: host
+  pid: host
+  privileged: true
+  environment:
+    MESOS_MASTER: zk://127.0.0.1:2181/mesos
+    MESOS_HOSTNAME: 127.0.0.1
+    MESOS_IP: 127.0.0.1
+    MESOS_CONTAINERIZERS: docker,mesos
+  volumes:
+    - /sys/fs/cgroup:/sys/fs/cgroup
+    - /usr/bin/docker:/usr/bin/docker:ro
+    - /usr/lib/x86_64-linux-gnu/libapparmor.so.1:/usr/lib/x86_64-linux-gnu/libapparmor.so.1:ro
+    - /var/run/docker.sock:/var/run/docker.sock
+
+marathon:
+  image: mesosphere/marathon:v0.9.2
+  net: host
+  environment:
+    MARATHON_MASTER: zk://127.0.0.1:2181/mesos
+    MARATHON_ZK: zk://127.0.0.1:2181/marathon
+    MARATHON_HOSTNAME: 127.0.0.1
+  command: --event_subscriber http_callback

traefik.go

@@ -41,7 +41,7 @@ func main() {
 	fmtlog.SetFlags(fmtlog.Lshortfile | fmtlog.LstdFlags)
 	var srv *graceful.Server
 	var configurationRouter *mux.Router
-	var configurationChan = make(chan *Configuration)
+	var configurationChan = make(chan *Configuration, 10)
 	defer close(configurationChan)
 	var providers = []Provider{}
 	var format = logging.MustStringFormatter("%{color}%{time:15:04:05.000} %{shortfile:20.20s} %{level:8.8s} %{id:03x} ▶%{color:reset} %{message}")
@@ -122,7 +122,9 @@ func main() {
 	if gloablConfiguration.Web != nil {
 		providers = append(providers, gloablConfiguration.Web)
 	}
-	// providers = append(providers, NewConsulProvider())
+	if gloablConfiguration.Consul != nil {
+		providers = append(providers, gloablConfiguration.Consul)
+	}
 
 	// start providers
 	for _, provider := range providers {

traefik.sample.toml

@@ -172,6 +172,41 @@
 # filename = "marathon.tmpl"
 
 
+################################################################
+# Consul KV configuration backend
+################################################################
+
+# Enable Consul KV configuration backend
+#
+# Optional
+#
+# [consul]
+
+# Consul server endpoint
+#
+# Required
+#
+# endpoint = "http://127.0.0.1:8500"
+
+# Enable watch Consul changes
+#
+# Optional
+#
+# watch = true
+
+# Prefix used for KV store.
+#
+# Optional
+#
+# prefix = "traefik"
+
+# Override default configuration template. For advanced users :)
+#
+# Optional
+#
+# filename = "consul.tmpl"
+
+
 
 ################################################################
 # Sample rules

traefik.toml

@@ -41,7 +41,7 @@ port = ":8081"
 # Optional
 # Default: "ERROR"
 #
-# logLevel = "ERROR"
+logLevel = "DEBUG"
 
 # SSL certificate and key used
 #
@@ -75,7 +75,7 @@ address = ":8082"
 #
 # Optional
 #
-# [file]
+[file]
 
 # Rules file
 # If defined, traefik will load rules from this file,
@@ -89,7 +89,7 @@ address = ":8082"
 #
 # Optional
 #
-# watch = true
+watch = true
 
 
 ################################################################
@@ -100,26 +100,26 @@ address = ":8082"
 #
 # Optional
 #
-[docker]
+# [docker]
 
 # Docker server endpoint. Can be a tcp or a unix socket endpoint.
 #
 # Required
 #
-endpoint = "unix:///var/run/docker.sock"
+# endpoint = "unix:///var/run/docker.sock"
 
 # Enable watch docker changes
 #
 # Optional
 #
-watch = true
+# watch = true
 
 # Default domain used.
 # Can be overridden by setting the "traefik.domain" label on a container.
 #
 # Required
 #
-domain = "docker.localhost"
+# domain = "docker.localhost"
 
 # Override default configuration template. For advanced users :)
 #
@@ -172,34 +172,68 @@ domain = "docker.localhost"
 # filename = "marathon.tmpl"
 
 
+################################################################
+# Consul KV configuration backend
+################################################################
+
+# Enable Consul KV configuration backend
+#
+# Optional
+#
+# [consul]
+
+# Consul server endpoint
+#
+# Required
+#
+# endpoint = "http://127.0.0.1:8500"
+
+# Enable watch Consul changes
+#
+# Optional
+#
+# watch = true
+
+# Prefix used for KV store.
+#
+# Optional
+#
+# prefix = "traefik"
+
+# Override default configuration template. For advanced users :)
+#
+# Optional
+#
+# filename = "consul.tmpl"
+
 
 ################################################################
 # Sample rules
 ################################################################
-# [backends]
+[backends]
-#   [backends.backend1]
+  [backends.backend1]
-#     [backends.backend1.servers.server1]
+    [backends.backend1.servers.server1]
-#     url = "http://172.17.0.2:80"
+    url = "http://172.17.0.2:80"
-#     weight = 10
+    weight = 10
-#     [backends.backend1.servers.server2]
+    [backends.backend1.servers.server2]
-#     url = "http://172.17.0.3:80"
+    url = "http://172.17.0.3:80"
-#     weight = 1
+    weight = 1
-#   [backends.backend2]
+  [backends.backend2]
-#     [backends.backend2.servers.server1]
+    [backends.backend2.servers.server1]
-#     url = "http://172.17.0.4:80"
+    url = "http://172.17.0.83:80"
-#     weight = 1
+    weight = 3
-#     [backends.backend2.servers.server2]
+    [backends.backend2.servers.server2]
-#     url = "http://172.17.0.5:80"
+    url = "http://172.17.0.5:80"
-#     weight = 2
+    weight = 10
-#
+
-# [frontends]
+[frontends]
-#   [frontends.frontend1]
+  [frontends.frontend1]
-#   backend = "backend2"
+  backend = "backend2"
-#     [frontends.frontend1.routes.test_1]
+    [frontends.frontend1.routes.test_1]
-#     category = "Host"
+    rule = "Host"
-#     value = "test.localhost"
+    value = "test.localhost"
-#   [frontends.frontend2]
+  [frontends.frontend2]
-#   backend = "backend1"
+  backend = "backend1"
-#     [frontends.frontend2.routes.test_2]
+    [frontends.frontend2.routes.test_2]
-#     category = "Path"
+    rule = "Path"
-#     value = "/test"
+    value = "/test"