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Providers refactoring

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This commit is contained in:
emile 2015-09-07 10:38:58 +02:00
parent 8fcbd73edc
commit bf37869b8f
4 changed files with 169 additions and 67 deletions
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65
docker.go Normal file
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@ -0,0 +1,65 @@
package main
import(
"github.com/fsouza/go-dockerclient"
"fmt"
"github.com/leekchan/gtf"
"bytes"
"github.com/BurntSushi/toml"
)
type DockerProvider struct {
dockerClient *docker.Client
}
func (provider *DockerProvider) Provide(serviceChan chan<- Service){
endpoint := "unix:///var/run/docker.sock"
provider.dockerClient, _ = docker.NewClient(endpoint)
dockerEvents := make(chan *docker.APIEvents)
provider.dockerClient.AddEventListener(dockerEvents)
go func() {
for {
event := <-dockerEvents
fmt.Println("Event receveived", event)
service:= provider.loadDockerConfig()
serviceChan <- *service
}
}()
service:= provider.loadDockerConfig()
fmt.Println("Sending service")
serviceChan <- *service
}
func (provider *DockerProvider) loadDockerConfig() *Service {
service := new(Service)
containerList, _ := provider.dockerClient.ListContainers(docker.ListContainersOptions{})
containersInspected := []docker.Container{}
for _, container := range containerList {
containerInspected, _ := provider.dockerClient.InspectContainer(container.ID)
containersInspected = append(containersInspected, *containerInspected)
}
containers := struct {
Containers []docker.Container
}{
containersInspected,
}
tmpl, err := gtf.New("docker.tmpl").ParseFiles("docker.tmpl")
if err != nil {
panic(err)
}
var buffer bytes.Buffer
err = tmpl.Execute(&buffer, containers)
if err != nil {
panic(err)
}
fmt.Println(buffer.String())
if _, err := toml.Decode(buffer.String(), service); err != nil {
fmt.Println(err)
return nil
}
return service
}

5
provider.go Normal file
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@ -0,0 +1,5 @@
package main
type Provider interface {
Provide(chan<- Service)
}

25
service.go Normal file
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@ -0,0 +1,25 @@
package main
type Backend struct {
Servers map[string]Server
}
type Server struct {
Url string
}
type Rule struct {
Category string
Value string
}
type Route struct {
Backends []string
Rules map[string]Rule
}
type Service struct {
Backends map[string]Backend
Routes map[string]Route
}

141
tortuous.go
View file

@ -1,64 +1,57 @@
package main
import (
"github.com/gorilla/mux"
"github.com/tylerb/graceful"
"net/http"
"bytes"
"fmt"
"os"
"github.com/BurntSushi/toml"
"github.com/fsouza/go-dockerclient"
"github.com/gorilla/mux"
"github.com/leekchan/gtf"
"github.com/mailgun/oxy/forward"
"github.com/mailgun/oxy/roundrobin"
"time"
"net"
"os/signal"
"syscall"
"github.com/BurntSushi/toml"
"reflect"
"net/url"
"github.com/fsouza/go-dockerclient"
"github.com/leekchan/gtf"
"bytes"
"github.com/tylerb/graceful"
"github.com/unrolled/render"
"net"
"net/http"
"net/url"
"os"
"os/signal"
"reflect"
"syscall"
"time"
)
type Backend struct {
Servers map[string]Server
}
type Server struct {
Url string
}
type Rule struct {
Category string
Value string
}
type Route struct {
Backends []string
Rules map[string]Rule
}
type Config struct {
Backends map[string]Backend
Routes map[string]Route
}
var srv *graceful.Server
var userRouter *mux.Router
var config = new(Config)
var renderer = render.New()
var currentService = new(Service)
var serviceChan = make(chan Service)
var providers = []Provider{}
func main() {
providers = append(providers, new(DockerProvider))
sigs := make(chan os.Signal, 1)
signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
systemRouter := mux.NewRouter()
systemRouter.Methods("POST").Path("/restart").HandlerFunc(RestartHandler)
systemRouter.Methods("POST").Path("/reload").HandlerFunc(ReloadConfigHandler)
systemRouter.Methods("GET").Path("/").HandlerFunc(GetConfigHandler)
go http.ListenAndServe(":8000", systemRouter)
userRouter = LoadConfig()
go func() {
for {
service := <-serviceChan
fmt.Println("Service receveived", service)
currentService = &service
userRouter = LoadConfig(service)
srv.Stop(10 * time.Second)
}
}()
for _, provider := range providers {
provider.Provide(serviceChan)
}
goAway := false
go func() {
@ -68,12 +61,12 @@ func main() {
srv.Stop(10 * time.Second)
}()
for{
if (goAway){
for {
if goAway {
break
}
srv = &graceful.Server{
Timeout: 10 * time.Second,
Timeout: 10 * time.Second,
NoSignalHandling: true,
ConnState: func(conn net.Conn, state http.ConnState) {
@ -81,23 +74,21 @@ func main() {
},
Server: &http.Server{
Addr: ":8001",
Addr: ":8001",
Handler: userRouter,
},
}
go srv.ListenAndServe()
fmt.Println("Started")
<- srv.StopChan()
<-srv.StopChan()
fmt.Println("Stopped")
}
}
func LoadDockerConfig(){
endpoint := "unix:///var/run/docker.sock"
client, _ := docker.NewClient(endpoint)
func LoadDockerConfig(client *docker.Client, service Service) {
containerList, _ := client.ListContainers(docker.ListContainersOptions{})
containersInspected := []docker.Container{}
containersInspected := []docker.Container{}
for _, container := range containerList {
containerInspected, _ := client.InspectContainer(container.ID)
containersInspected = append(containersInspected, *containerInspected)
@ -108,39 +99,52 @@ func LoadDockerConfig(){
containersInspected,
}
tmpl, err := gtf.New("docker.tmpl").ParseFiles("docker.tmpl")
if err != nil { panic(err) }
if err != nil {
panic(err)
}
var buffer bytes.Buffer
err = tmpl.Execute(&buffer, containers)
if err != nil { panic(err) }
if err != nil {
panic(err)
}
fmt.Println(buffer.String())
if _, err := toml.Decode(buffer.String(), config); err != nil {
if _, err := toml.Decode(buffer.String(), service); err != nil {
fmt.Println(err)
return
}
}
func LoadFileConfig(){
if _, err := toml.DecodeFile("tortuous.toml", config); err != nil {
func LoadFileConfig(service Service) {
if _, err := toml.DecodeFile("tortuous.toml", service); err != nil {
fmt.Println(err)
return
}
}
func LoadConfig() *mux.Router{
//LoadDockerConfig()
LoadFileConfig()
func LoadConfig(service Service) *mux.Router {
/*endpoint := "unix:///var/run/docker.sock"
client, _ := docker.NewClient(endpoint)
dockerEvents := make(chan *docker.APIEvents)
LoadDockerConfig(client)
client.AddEventListener(dockerEvents)
go func() {
for {
event := <-dockerEvents
fmt.Println("Event receveived", event)
}
}()*/
//LoadFileConfig()
router := mux.NewRouter()
for routeName, route := range config.Routes {
for routeName, route := range service.Routes {
fmt.Println("Creating route", routeName)
fwd, _ := forward.New()
newRoutes:= []*mux.Route{}
for ruleName, rule := range route.Rules{
newRoutes := []*mux.Route{}
for ruleName, rule := range route.Rules {
fmt.Println("Creating rule", ruleName)
newRouteReflect := Invoke(router.NewRoute(), rule.Category, rule.Value)
newRoute := newRouteReflect[0].Interface().(*mux.Route)
@ -150,7 +154,7 @@ func LoadConfig() *mux.Router{
fmt.Println("Creating backend", backendName)
lb, _ := roundrobin.New(fwd)
rb, _ := roundrobin.NewRebalancer(lb)
for serverName, server := range config.Backends[backendName].Servers {
for serverName, server := range service.Backends[backendName].Servers {
fmt.Println("Creating server", serverName)
url, _ := url.Parse(server.Url)
rb.UpsertServer(url)
@ -163,25 +167,28 @@ func LoadConfig() *mux.Router{
return router
}
func DeployService() {
userRouter = LoadConfig(*currentService)
}
func ReloadConfigHandler(rw http.ResponseWriter, r *http.Request) {
userRouter = LoadConfig()
DeployService()
srv.Stop(10 * time.Second)
renderer.JSON(rw, http.StatusOK, map[string]interface{}{"status": "reloaded"})
}
func RestartHandler(rw http.ResponseWriter, r *http.Request) {
srv.Stop(10 * time.Second)
renderer.JSON(rw, http.StatusOK, map[string]interface{}{"status": "restarted"})
}
func GetConfigHandler(rw http.ResponseWriter, r *http.Request) {
renderer.JSON(rw, http.StatusOK, config)
renderer.JSON(rw, http.StatusOK, currentService)
}
func Invoke(any interface{}, name string, args... interface{}) []reflect.Value {
func Invoke(any interface{}, name string, args ...interface{}) []reflect.Value {
inputs := make([]reflect.Value, len(args))
for i, _ := range args {
inputs[i] = reflect.ValueOf(args[i])
}
return reflect.ValueOf(any).MethodByName(name).Call(inputs)
}