Beispiel #1
0
func main() {
	// Most flags are defined in the confd/config package which allows us to
	// override configuration settings from the command line. Parse the flags now
	// to make them active.
	flag.Parse()
	if printVersion {
		fmt.Printf("confd %s\n", Version)
		os.Exit(0)
	}
	if configFile == "" {
		if IsFileExist(defaultConfigFile) {
			configFile = defaultConfigFile
		}
	}
	// Initialize the global configuration.
	log.Debug("Loading confd configuration")
	if err := config.LoadConfig(configFile); err != nil {
		log.Fatal(err.Error())
	}
	// Configure logging. While you can enable debug and verbose logging, however
	// if quiet is set to true then debug and verbose messages will not be printed.
	log.SetQuiet(config.Quiet())
	log.SetVerbose(config.Verbose())
	log.SetDebug(config.Debug())
	log.Notice("Starting confd")

	// Create the storage client
	log.Notice("Backend set to " + config.Backend())
	store, err := backends.New(config.Backend())
	if err != nil {
		log.Fatal(err.Error())
	}

	signalChan := make(chan os.Signal, 1)
	signal.Notify(signalChan, syscall.SIGINT, syscall.SIGTERM)
	for {
		runErrors := template.ProcessTemplateResources(store)
		// If the -onetime flag is passed on the command line we immediately exit
		// after processing the template config files.
		if onetime {
			if len(runErrors) > 0 {
				os.Exit(1)
			}
			os.Exit(0)
		}
		select {
		case c := <-signalChan:
			log.Info(fmt.Sprintf("captured %v exiting...", c))
			os.Exit(0)
		case <-time.After(time.Duration(config.Interval()) * time.Second):
			// Continue processing templates.
		}
	}
}
Beispiel #2
0
func main() {
	flag.Parse()
	if printVersion {
		fmt.Printf("confd %s\n", Version)
		os.Exit(0)
	}
	if err := initConfig(); err != nil {
		log.Fatal(err.Error())
	}

	log.Info("Starting confd")

	storeClient, err := backends.New(backendsConfig)
	if err != nil {
		log.Fatal(err.Error())
	}

	templateConfig.StoreClient = storeClient
	if onetime {
		if err := template.Process(templateConfig); err != nil {
			os.Exit(1)
		}
		os.Exit(0)
	}

	stopChan := make(chan bool)
	doneChan := make(chan bool)
	errChan := make(chan error, 10)

	var processor template.Processor
	switch {
	case config.Watch:
		processor = template.WatchProcessor(templateConfig, stopChan, doneChan, errChan)
	default:
		processor = template.IntervalProcessor(templateConfig, stopChan, doneChan, errChan, config.Interval)
	}

	go processor.Process()

	signalChan := make(chan os.Signal, 1)
	signal.Notify(signalChan, syscall.SIGINT, syscall.SIGTERM)
	for {
		select {
		case err := <-errChan:
			log.Error(err.Error())
		case s := <-signalChan:
			log.Info(fmt.Sprintf("Captured %v. Exiting...", s))
			close(doneChan)
		case <-doneChan:
			os.Exit(0)
		}
	}
}
Beispiel #3
0
// NewAsgClient returns EC2 and ASG clients with a connection to the region
// configured via the AWS SDK configuration
// It returns an error if the connection cannot be made and exits if the
// AutoScalingGroup does not exist.
func NewAsgClient(asg string, region *string) (*Client, error) {
	providers := []credentials.Provider{
		&credentials.SharedCredentialsProvider{},
		&credentials.EnvProvider{},
	}
	ec2RoleConn, ec2RoleErr := net.DialTimeout("tcp", "169.254.169.254:80", 100*time.Millisecond)
	if ec2RoleErr == nil {
		ec2RoleConn.Close()
		providers = append(providers, &ec2rolecreds.EC2RoleProvider{})
	}

	creds := credentials.NewChainCredentials(providers)
	_, credErr := creds.Get()
	if credErr != nil {
		log.Fatal("Can't find AWS credentials")
		return nil, credErr
	}

	// Use region if provided, otherwise rely on the AWS_REGION
	// environment variable.
	var c *aws.Config
	if region != nil && *region != "" {
		c = &aws.Config{
			Region: aws.String(*region),
		}
	}
	a := autoscaling.New(c)
	e := ec2.New(c)
	describeAsgReq, describeAsgErr := a.DescribeAutoScalingGroups(
		&autoscaling.DescribeAutoScalingGroupsInput{
			AutoScalingGroupNames: []*string{&asg},
		},
	)
	if describeAsgErr != nil {
		return nil, describeAsgErr
	}
	if len(describeAsgReq.AutoScalingGroups) == 0 {
		log.Fatal("Can't find Auto Scaling Group with name '" + asg + "'")
	}
	return &Client{
		a,
		e,
		asg,
	}, nil
}
Beispiel #4
0
func main() {
	// Most flags are defined in the confd/config package which allows us to
	// override configuration settings from the command line. Parse the flags now
	// to make them active.
	flag.Parse()
	if configFile == "" {
		if IsFileExist(defaultConfigFile) {
			configFile = defaultConfigFile
		}
	}
	// Initialize the global configuration.
	log.Debug("Loading confd configuration")
	if err := config.LoadConfig(configFile); err != nil {
		log.Fatal(err.Error())
	}
	// Configure logging. While you can enable debug and verbose logging, however
	// if quiet is set to true then debug and verbose messages will not be printed.
	log.SetQuiet(config.Quiet())
	log.SetVerbose(config.Verbose())
	log.SetDebug(config.Debug())
	log.Notice("Starting confd")
	// Create the etcd client upfront and use it for the life of the process.
	// The etcdClient is an http.Client and designed to be reused.
	log.Notice("etcd nodes set to " + strings.Join(config.EtcdNodes(), ", "))
	etcdClient, err := etcdutil.NewEtcdClient(config.EtcdNodes(), config.ClientCert(), config.ClientKey(), config.ClientCaKeys())
	if err != nil {
		log.Fatal(err.Error())
	}
	for {
		runErrors := template.ProcessTemplateResources(etcdClient)
		// If the -onetime flag is passed on the command line we immediately exit
		// after processing the template config files.
		if onetime {
			if len(runErrors) > 0 {
				os.Exit(1)
			}
			os.Exit(0)
		}
		time.Sleep(time.Duration(config.Interval()) * time.Second)
	}
}
Beispiel #5
0
func main() {
	// Most flags are defined in the confd/config package which allows us to
	// override configuration settings from the command line. Parse the flags now
	// to make them active.
	flag.Parse()
	if configFile == "" {
		if IsFileExist(defaultConfigFile) {
			configFile = defaultConfigFile
		}
	}
	// Initialize the global configuration.
	log.Debug("Loading confd configuration")
	if err := config.LoadConfig(configFile); err != nil {
		log.Fatal(err.Error())
	}
	// Configure logging. While you can enable debug and verbose logging, however
	// if quiet is set to true then debug and verbose messages will not be printed.
	log.SetQuiet(config.Quiet())
	log.SetVerbose(config.Verbose())
	log.SetDebug(config.Debug())
	log.Notice("Starting confd")

	// Create the storage client
	store, err := createStoreClient(config.Backend())
	if err != nil {
		log.Fatal(err.Error())
	}

	for {
		runErrors := template.ProcessTemplateResources(store)
		// If the -onetime flag is passed on the command line we immediately exit
		// after processing the template config files.
		if onetime {
			if len(runErrors) > 0 {
				os.Exit(1)
			}
			os.Exit(0)
		}
		time.Sleep(time.Duration(config.Interval()) * time.Second)
	}
}
Beispiel #6
0
func (p *watchProcessor) Process() {
	defer close(p.doneChan)
	ts, err := getTemplateResources(p.config)
	if err != nil {
		log.Fatal(err.Error())
		return
	}
	for _, t := range ts {
		t := t
		p.wg.Add(1)
		go p.monitorPrefix(t)
	}
	p.wg.Wait()
}
Beispiel #7
0
func (p *intervalProcessor) Process() {
	defer close(p.doneChan)
	ts, err := getTemplateResources(p.config)
	if err != nil {
		log.Fatal(err.Error())
		return
	}
	for {
		process(ts)
		select {
		case <-p.stopChan:
			break
		case <-time.After(time.Duration(p.interval) * time.Second):
			continue
		}
	}
}
Beispiel #8
0
func main() {
	log.Info("Starting confd")
	// All flags are defined in the confd/config package which allow us to
	// override configuration settings from the cli. Parse the flags now to
	// make them active.
	flag.Parse()
	if err := InitConfig(); err != nil {
		log.Fatal(err.Error())
	}
	for {
		if err := ProcessTemplateResources(); err != nil {
			log.Error(err.Error())
		}
		// If the -onetime flag is passed on the command line we immediately exit
		// after processing the template config files.
		if Onetime() {
			break
		}
		// By default we poll etcd every 30 seconds
		time.Sleep(time.Duration(Interval()) * time.Second)
	}
}