func newExternalSources(options map[string][]string) ([]api.Source, error) {
hostsFile := defaultHostsFile
if len(options["hostsFile"]) > 0 {
hostsFile = options["hostsFile"][0]
}
standalone := defaultStandalone
if len(options["standalone"]) > 0 {
standaloneOption, err := strconv.ParseBool(options["standalone"][0])
if err != nil {
return nil, err
}
standalone = standaloneOption
}
nodesApi, err := nodes.NewExternalNodes(standalone, hostsFile)
if err != nil {
return nil, err
}
cadvisorPort := defaultCadvisorPort
if len(options["cadvisorPort"]) > 0 {
cadvisorPort, err = strconv.Atoi(options["cadvisorPort"][0])
if err != nil {
return nil, err
}
}
return []api.Source{
&cadvisorSource{
cadvisorApi: datasource.NewCadvisor(),
nodesApi: nodesApi,
cadvisorPort: cadvisorPort,
},
}, nil
}
func newExternalCadvisorSource(pollDuration time.Duration) (Source, error) {
if *argCadvisorPort <= 0 {
return nil, fmt.Errorf("invalid cadvisor port - %d", *argCadvisorPort)
}
nodesApi, err := nodes.NewExternalNodes()
if err != nil {
return nil, err
}
return &cadvisorSource{
pollDuration: pollDuration,
cadvisorApi: datasource.NewCadvisor(),
nodesApi: nodesApi,
cadvisorPort: strconv.Itoa(*argCadvisorPort),
lastQuery: time.Now(),
}, nil
}