/
logs.go
205 lines (183 loc) · 5.15 KB
/
logs.go
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package app
import (
"bufio"
"encoding/json"
"os"
"strconv"
"time"
"github.com/astaxie/beego"
"github.com/astaxie/beego/toolbox"
"github.com/sirupsen/logrus"
"github.com/snagles/docker-registry-manager/app/conf"
)
type logResponse struct {
Error error `json:"error,omitempty"`
Message string `json:"message,omitempty"`
}
// LogsController controls all actions to modify, return, and archive logs
type LogsController struct {
beego.Controller
}
func (c *LogsController) Get() {
c.Data["activeLevel"] = logrus.GetLevel()
c.Data["allLevels"] = logrus.AllLevels
c.Data["logs"] = parseLogs()
c.Data["stats"] = toolbox.StatisticsMap.GetMapData()
c.TplName = "logs.tpl"
}
// GetRequestStatistics returns stats on request information tracked by beego
func (c *LogsController) GetRequestStatistics() {
c.Data["json"] = toolbox.StatisticsMap.GetMapData()
c.ServeJSON()
}
// Get just parses the logs on disk, and returns them as a json object
func (c *LogsController) GetJSON() {
c.Data["json"] = parseLogs()
c.ServeJSON()
}
// Delete truncates all logs on disk
func (c *LogsController) Delete() {
if err := deleteLog(); err != nil {
c.Data["json"] = logResponse{
Error: err,
Message: "Failed to clear log",
}
} else {
logrus.Warn("Cleared log file.")
c.Data["json"] = logResponse{
Message: "Cleared log.",
}
}
c.ServeJSON()
}
// Archive executes a log rotation
func (c *LogsController) Archive() {
if err := archiveLog(); err != nil {
c.Data["json"] = logResponse{
Error: err,
Message: "Failed to archive log",
}
} else {
logrus.Warn("Archived log file.")
c.Data["json"] = logResponse{
Message: "Archived log",
}
}
c.ServeJSON()
}
// PostLevel allows for the log level of the program to be changed dynamically
func (c *LogsController) PostLevel() {
level := c.Ctx.Input.Param(":level")
switch {
case level == "panic":
logrus.SetLevel(logrus.PanicLevel)
case level == "fatal":
logrus.SetLevel(logrus.FatalLevel)
case level == "error":
logrus.SetLevel(logrus.ErrorLevel)
case level == "warn":
logrus.SetLevel(logrus.WarnLevel)
case level == "info":
logrus.SetLevel(logrus.InfoLevel)
case level == "debug":
logrus.SetLevel(logrus.DebugLevel)
default:
c.Data["json"] = logResponse{
Message: "Failed to archive log",
}
c.ServeJSON()
return
}
logrus.Warn("Changed log level to " + level)
c.Data["json"] = logResponse{
Message: "Changed log level to " + level,
}
c.ServeJSON()
}
// GetLevel returns the strinified representation of the current log level
func (c *LogsController) GetLevel() {
c.Data["json"] = map[string]interface{}{"log_level": logrus.GetLevel().String(), "log_level_int": logrus.GetLevel()}
c.ServeJSON()
}
// parseLogs parses the locally stored flat log file that was logged to by logrus
//{"file":"log.go","level":"warning","line":588,"msg":"test","source":"beego","time":"2017-04-29T20:37:09-04:00"}
// Entry is the memory representation of a forwarded registry event
type Entry struct {
File string `json:"file"`
Level string `json:"level"`
Line int `json:"line"`
Message string `json:"msg"`
Source string `json:"source"`
Time time.Time `json:"time"`
}
func parseLogs() []Entry {
file, err := os.Open(conf.LogFile)
defer file.Close()
if err != nil {
logrus.WithFields(logrus.Fields{
"Error": err.Error(),
}).Error("Failed to open configured log file: " + conf.LogFile)
}
es := []Entry{}
scanner := bufio.NewScanner(file)
for scanner.Scan() {
e := Entry{}
err := json.Unmarshal(scanner.Bytes(), &e)
if err != nil {
logrus.WithFields(logrus.Fields{
"Error": err.Error(),
}).Error("Failed to parse log file line")
return es
}
es = append(es, e)
}
if err := scanner.Err(); err != nil {
logrus.WithFields(logrus.Fields{
"Error": err.Error(),
}).Error("Failed to parseLogs log file line")
}
return es
}
// deleteLogs empties the log file
func deleteLog() error {
// Create the new file
if _, err := os.Create(conf.LogFile + ".new"); err != nil {
logrus.Error(err)
return err
}
// Rename the old error log, and update the name of the new one
if err := os.Rename(conf.LogFile, conf.LogFile+".old"); err != nil {
logrus.Error(err)
return err
}
if err := os.Rename(conf.LogFile+".new", conf.LogFile); err != nil {
logrus.Error(err)
return err
}
if err := os.Remove(conf.LogFile + ".old"); err != nil {
logrus.Error(err)
}
f, _ := os.OpenFile(conf.LogFile, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0755)
logrus.SetOutput(f)
return nil
}
// archiveLog creates a backup of the current log in the logs directory, creates a new log file, and writes to the new log
func archiveLog() error {
// Create the new file
if _, err := os.Create(conf.LogFile + ".new"); err != nil {
logrus.Error(err)
return err
}
// Rename the old error log, and update the name of the new one
if err := os.Rename(conf.LogFile, conf.LogDir+strconv.Itoa(int(time.Now().Unix()))+".json"); err != nil {
logrus.Error(err)
return err
}
if err := os.Rename(conf.LogFile+".new", conf.LogFile); err != nil {
logrus.Error(err)
return err
}
f, _ := os.OpenFile(conf.LogFile, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0755)
logrus.SetOutput(f)
return nil
}