func NewSystemStatsMonitorOrDie()

in pkg/systemstatsmonitor/system_stats_monitor.go [54:105]
45 lines of code
12 McCabe index (conditional complexity)

func NewSystemStatsMonitorOrDie(configPath string) types.Monitor {
	ssm := systemStatsMonitor{
		configPath: configPath,
		tomb:       tomb.NewTomb(),
	}

	// Apply configurations.
	f, err := ioutil.ReadFile(configPath)
	if err != nil {
		glog.Fatalf("Failed to read configuration file %q: %v", configPath, err)
	}
	err = json.Unmarshal(f, &ssm.config)
	if err != nil {
		glog.Fatalf("Failed to unmarshal configuration file %q: %v", configPath, err)
	}

	err = ssm.config.ApplyConfiguration()
	if err != nil {
		glog.Fatalf("Failed to apply configuration for %q: %v", configPath, err)
	}

	err = ssm.config.Validate()
	if err != nil {
		glog.Fatalf("Failed to validate %s configuration %+v: %v", ssm.configPath, ssm.config, err)
	}

	if len(ssm.config.CPUConfig.MetricsConfigs) > 0 {
		ssm.cpuCollector = NewCPUCollectorOrDie(&ssm.config.CPUConfig)
	}
	if len(ssm.config.DiskConfig.MetricsConfigs) > 0 {
		ssm.diskCollector = NewDiskCollectorOrDie(&ssm.config.DiskConfig)
	}
	if len(ssm.config.HostConfig.MetricsConfigs) > 0 {
		ssm.hostCollector = NewHostCollectorOrDie(&ssm.config.HostConfig)
	}
	if len(ssm.config.MemoryConfig.MetricsConfigs) > 0 {
		ssm.memoryCollector = NewMemoryCollectorOrDie(&ssm.config.MemoryConfig)
	}
	if len(ssm.config.OsFeatureConfig.MetricsConfigs) > 0 {
		// update the KnownModulesConfigPath to relative the system-stats-monitors path
		// only when the KnownModulesConfigPath path is relative
		if !filepath.IsAbs(ssm.config.OsFeatureConfig.KnownModulesConfigPath) {
			ssm.config.OsFeatureConfig.KnownModulesConfigPath = filepath.Join(filepath.Dir(configPath),
				ssm.config.OsFeatureConfig.KnownModulesConfigPath)
		}
		ssm.osFeatureCollector = NewOsFeatureCollectorOrDie(&ssm.config.OsFeatureConfig)
	}
	if len(ssm.config.NetConfig.MetricsConfigs) > 0 {
		ssm.netCollector = NewNetCollectorOrDie(&ssm.config.NetConfig)
	}
	return &ssm
}