106 lines
2.1 KiB
Go
106 lines
2.1 KiB
Go
package main
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import (
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"encoding/json"
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"errors"
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"flag"
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"fmt"
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"io/ioutil"
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"log"
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"net/http"
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"net/url"
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"os"
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cachet "github.com/castawaylabs/cachet-monitor"
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)
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var configPath string
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var systemName string
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var logPath string
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func main() {
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flag.StringVar(&configPath, "c", "/etc/cachet-monitor.config.json", "Config path")
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flag.StringVar(&systemName, "name", "", "System Name")
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flag.StringVar(&logPath, "log", "", "Log path")
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flag.Parse()
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cfg, err := getConfiguration(configPath)
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if err != nil {
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panic(err)
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}
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if len(systemName) > 0 {
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cfg.SystemName = systemName
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}
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if len(logPath) > 0 {
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cfg.LogPath = logPath
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}
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if len(os.Getenv("CACHET_API")) > 0 {
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cfg.APIUrl = os.Getenv("CACHET_API")
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}
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if len(os.Getenv("CACHET_TOKEN")) > 0 {
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cfg.APIToken = os.Getenv("CACHET_TOKEN")
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}
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if err := cfg.ValidateConfiguration(); err != nil {
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panic(err)
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}
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cfg.Run()
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}
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func getLogger(logPath string) *log.Logger {
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var logWriter = os.Stdout
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var err error
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if len(logPath) > 0 {
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logWriter, err = os.Create(logPath)
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if err != nil {
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fmt.Printf("Unable to open file '%v' for logging\n", logPath)
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os.Exit(1)
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}
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}
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flags := log.Llongfile | log.Ldate | log.Ltime
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if len(os.Getenv("CACHET_DEV")) > 0 {
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flags = 0
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}
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return log.New(logWriter, "", flags)
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}
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func getConfiguration(path string) (*cachet.CachetMonitor, error) {
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var cfg cachet.CachetMonitor
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var data []byte
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// test if its a url
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url, err := url.ParseRequestURI(path)
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if err == nil && len(url.Scheme) > 0 {
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// download config
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response, err := http.Get(path)
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if err != nil {
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return nil, errors.New("Cannot download network config: " + err.Error())
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}
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defer response.Body.Close()
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data, _ = ioutil.ReadAll(response.Body)
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fmt.Println("Downloaded network configuration.")
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} else {
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data, err = ioutil.ReadFile(path)
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if err != nil {
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return nil, errors.New("Config file '" + path + "' missing!")
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}
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}
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if err := json.Unmarshal(data, &cfg); err != nil {
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fmt.Println(err)
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return nil, errors.New("Cannot parse config!")
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}
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cfg.Logger = getLogger(cfg.LogPath)
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return &cfg, nil
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}
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