forked from nathanielc/morgoth
/
app.go
176 lines (152 loc) · 4.33 KB
/
app.go
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package morgoth
import (
"fmt"
"github.com/nathanielc/morgoth/Godeps/_workspace/src/github.com/golang/glog"
"os"
"os/signal"
"regexp"
"syscall"
)
type App struct {
apiServer *APIServer
alertsManager *AlertsManager
mapper *Mapper
manager *Manager
engine Engine
config *Config
shutdownChan chan bool
Stats AppStats
}
type AppStats struct {
MapperStats *MapperStats
}
func NewApp(config *Config) *App {
app := App{
config: config,
shutdownChan: make(chan bool),
}
return &app
}
func (self *App) Run() (err error) {
glog.Info("Starting app")
glog.Info("Setup signal handler")
go self.signalHandler()
glog.Info("Setup Engine")
self.engine, err = self.config.EngineConf.GetEngine()
if err != nil {
return
}
err = self.engine.Initialize()
if err != nil {
return
}
glog.Info("Setup Mapper")
detectorMatchers := make([]*DetectorMatcher, len(self.config.Mappings))
for i, mapping := range self.config.Mappings {
namePattern, err := regexp.Compile(mapping.Name)
if err != nil {
return fmt.Errorf("Error parsing regexp: %s: %s", mapping.Name, err)
}
tagPatterns := make(map[string]*regexp.Regexp, len(mapping.Tags))
for tag, pattern := range mapping.Tags {
r, err := regexp.Compile(pattern)
if err != nil {
return fmt.Errorf("Error parsing regexp: %s: %s", pattern, err)
}
tagPatterns[tag] = r
}
fingerprinters := make([]Fingerprinter, len(mapping.Detector.Fingerprinters))
for i, fp := range mapping.Detector.Fingerprinters {
f, err := fp.GetFingerprinter()
if err != nil {
return fmt.Errorf("Error creating Fingerprinter: %s", err)
}
fingerprinters[i] = f
}
detectorBuilder := NewDetectorBuilder(
mapping.Detector.NormalCount,
mapping.Detector.Consensus,
mapping.Detector.MinSupport,
mapping.Detector.ErrorTolerance,
fingerprinters,
)
glog.V(1).Infof("Created detector builder: %v", mapping.Detector)
matcher := NewDetectorMatcher(namePattern, tagPatterns, detectorBuilder)
glog.V(1).Infof("Created detector matcher: %v", matcher)
detectorMatchers[i] = matcher
}
detectorMappers := make([]*DetectorMapper, 0)
self.mapper = NewMapper(detectorMappers, detectorMatchers)
self.Stats.MapperStats = &self.mapper.Stats
glog.Info("Setup Manager")
scheduledDataQueries := make([]*scheduledDataQuery, len(self.config.Schedules))
for i, sc := range self.config.Schedules {
builder, err := self.engine.NewQueryBuilder(sc.Query, sc.GroupByInterval)
if err != nil {
return fmt.Errorf("Invalid query string: '%s', %s", sc.Query, err)
}
q := &scheduledDataQuery{
sq: NewScheduledQuery(
builder,
sc.Delay,
sc.Period,
),
tags: sc.Tags,
}
scheduledDataQueries[i] = q
}
self.manager = NewManager(self.mapper, self.engine, scheduledDataQueries)
glog.Info("Starting Manager...")
self.manager.Start()
glog.Infof("Starting APIServer on :%d", self.config.APIPort)
self.apiServer = NewAPIServer(self, self.config.APIPort)
self.apiServer.Start()
glog.Infof("Starting Alert Manger...")
scheduledAlertQueries := make([]*scheduledAlertQuery, len(self.config.Alerts))
for i, ac := range self.config.Alerts {
builder, err := self.engine.NewQueryBuilder(ac.Query, ac.GroupByInterval)
if err != nil {
return fmt.Errorf("Invalid query string: '%s', %s", ac.Query, err)
}
notifiers := make([]Notifier, len(ac.Notifiers))
for i, nc := range ac.Notifiers {
n, err := nc.GetNotifier()
if err != nil {
return fmt.Errorf("Invalid Notifier for query: '%s' Err: %s", ac.Query, err)
}
notifiers[i] = n
}
q := &scheduledAlertQuery{
sq: NewScheduledQuery(
builder,
ac.Delay,
ac.Period,
),
threshold: ac.Threshold,
notifiers: notifiers,
message: ac.Message,
}
scheduledAlertQueries[i] = q
}
self.alertsManager = NewAlertsManager(self.engine, scheduledAlertQueries)
self.alertsManager.Start()
// Wait for shutdown
<-self.shutdownChan
// Begin shutdown
self.manager.Stop()
self.apiServer.Stop()
glog.Info("App shutdown")
return
}
func (self *App) shutdownHandler() {
self.shutdownChan <- true
glog.Info("App shutdown handler complete")
}
func (self *App) signalHandler() {
signals := make(chan os.Signal, 1)
signal.Notify(signals, os.Interrupt, syscall.SIGTERM)
for signal := range signals {
glog.Infof("Received %s, shuting down...", signal)
self.shutdownHandler()
}
}