/
marathon.go
106 lines (84 loc) · 2.23 KB
/
marathon.go
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package main
import (
"encoding/json"
"fmt"
"net/http"
"github.com/kuende/kameni/Godeps/_workspace/src/github.com/mailgun/log"
)
const (
// StatusUpdateEvent is called when a task changes state
StatusUpdateEvent = "status_update_event"
)
var (
addStatuses = []string{"TASK_RUNNING"}
removeStatuses = []string{"TASK_FINISHED", "TASK_FAILED", "TASK_KILLED", "TASK_LOST"}
)
// MarathonEvent keeps a marathon event data
type MarathonEvent struct {
EventType string `json:"eventType"`
TaskID string `json:"taskId"`
TaskStatus string `json:"taskStatus"`
AppID string `json:"appId"`
Host string `json:"host"`
Ports []int `json:"ports"`
}
func decodeMarathonEvent(req *http.Request) (*MarathonEvent, error) {
var event MarathonEvent
decoder := json.NewDecoder(req.Body)
err := decoder.Decode(&event)
return &event, err
}
func handleMarathonEvent(req *http.Request) {
event, err := decodeMarathonEvent(req)
if err != nil {
log.Errorf("Error decoding data callback: %v", err)
return
}
if err = handleEvent(event); err != nil {
log.Errorf("%v", err)
}
}
func handleEvent(event *MarathonEvent) error {
if event.EventType == StatusUpdateEvent {
return handleStatusUpdate(event)
}
log.Infof("No action for event type: %s", event.EventType)
return nil
}
func handleStatusUpdate(event *MarathonEvent) error {
log.Infof("Received status update: %s", event.TaskStatus)
for _, status := range addStatuses {
if event.TaskStatus == status {
server := getServer(event)
if server != nil {
return addVulcandServer(event.AppID, *server)
}
return nil
}
}
for _, status := range removeStatuses {
if event.TaskStatus == status {
server := getServer(event)
if server != nil {
return removeVulcandServer(event.AppID, *server)
}
return nil
}
}
log.Infof("No action for status: %s", event.TaskStatus)
return nil
}
func getServer(event *MarathonEvent) *VulcandServer {
if len(event.Ports) == 0 {
log.Infof("No ports for app %s", event.AppID)
return nil
}
port := event.Ports[0]
url := fmt.Sprintf("http://%s:%d", event.Host, port)
hostPort := fmt.Sprintf("%s:%d", event.Host, port)
return &VulcandServer{
ID: event.TaskID,
URL: url,
HostPort: hostPort,
}
}