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calllogger.go
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calllogger.go
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// Call-Log: calling logger of Cloud & VM in CB-Spider
// Referred to cb-log
//
// * Cloud-Barista: https://github.com/cloud-barista
// * CB-Spider: https://github.com/cloud-barista/cb-spider
// * cb-log: https://github.com/cloud-barista/cb-log
//
// load and set config file
//
// ref) https://github.com/go-yaml/yaml/tree/v3
// https://godoc.org/gopkg.in/yaml.v3
//
// by CB-Spider Team, 2020.09.
package calllog
import (
"os"
"fmt"
"time"
"strings"
"reflect"
"github.com/chyeh/pubip"
"github.com/sirupsen/logrus"
"github.com/snowzach/rotatefilehook"
"github.com/cloud-barista/cb-spider/cloud-control-manager/cloud-driver/call-log/formatter"
)
type CLOUD_OS string
type RES_TYPE string
const (
//=========== CloudOS (ref: cb-spider/conf/cloudos.yaml)
AWS CLOUD_OS = "AWS"
GCP CLOUD_OS = "GCP"
AZURE CLOUD_OS = "AZURE"
OPENSTACK CLOUD_OS = "OPENSTACK"
CLOUDIT CLOUD_OS = "CLOUDIT"
ALIBABA CLOUD_OS = "ALIBABA"
DOCKER CLOUD_OS = "DOCKER"
CLOUDTWIN CLOUD_OS = "CLOUDTWIN"
NCP CLOUD_OS = "NCP"
MOCK CLOUD_OS = "MOCK"
//=========== ResourceType
VMIMAGE RES_TYPE = "VMIMAGE"
VMSPEC RES_TYPE = "VMSPEC"
VPCSUBNET RES_TYPE = "VPC/SUBNET"
SECURITYGROUP RES_TYPE = "SECURITYGROUP"
VMKEYPAIR RES_TYPE = "VMKEYPAIR"
VM RES_TYPE = "VM"
)
type CALLLogger struct {
loggerName string
logrus *logrus.Logger
}
// global var.
var (
HostIPorName string
callLogger *CALLLogger
callFormatter *calllogformatter.Formatter
calllogConfig CALLLOGCONFIG
)
func init() {
HostIPorName = getHostIPorName()
}
func getHostIPorName() string {
ip, err := pubip.Get()
if err != nil {
logrus.Error(err)
hostName, err := os.Hostname()
if err != nil {
logrus.Error(err)
}
return hostName
}
return ip.String()
}
func GetLogger(loggerName string) *logrus.Logger {
if callLogger != nil {
return callLogger.logrus
}
callLogger = new(CALLLogger)
callLogger.loggerName = loggerName
callLogger.logrus = &logrus.Logger{
Level: logrus.InfoLevel,
Out: os.Stderr,
Hooks: make(logrus.LevelHooks),
Formatter: getFormatter(loggerName),
}
// set config.
setup(loggerName)
return callLogger.logrus
}
func setup(loggerName string) {
calllogConfig = GetConfigInfos()
callLogger.logrus.SetReportCaller(true)
if calllogConfig.CALLLOG.LOOPCHECK {
SetLevel(calllogConfig.CALLLOG.LOGLEVEL)
go levelSetupLoop(loggerName)
} else {
SetLevel(calllogConfig.CALLLOG.LOGLEVEL)
}
if calllogConfig.CALLLOG.LOGFILE {
setRotateFileHook(loggerName, &calllogConfig)
}
}
// Now, this method is busy wait.
// @TODO must change this with file watch&event.
// ref) https://github.com/fsnotify/fsnotify/blob/master/example_test.go
func levelSetupLoop(loggerName string) {
for {
calllogConfig = GetConfigInfos()
SetLevel(calllogConfig.CALLLOG.LOGLEVEL)
time.Sleep(time.Second*2)
}
}
func setRotateFileHook(loggerName string, logConfig *CALLLOGCONFIG) {
level, _ := logrus.ParseLevel(logConfig.CALLLOG.LOGLEVEL)
rotateFileHook, err := rotatefilehook.NewRotateFileHook(rotatefilehook.RotateFileConfig{
Filename: logConfig.LOGFILEINFO.FILENAME,
MaxSize: logConfig.LOGFILEINFO.MAXSIZE, // megabytes
MaxBackups: logConfig.LOGFILEINFO.MAXBACKUPS,
MaxAge: logConfig.LOGFILEINFO.MAXAGE, //days
Level: level,
Formatter: getFormatter(loggerName),
})
if err != nil {
logrus.Fatalf("Failed to initialize file rotate hook: %v", err)
}
callLogger.logrus.AddHook(rotateFileHook)
}
func SetLevel(strLevel string) {
err := checkLevel(strLevel)
if err != nil {
logrus.Errorf("Failed to set log level: %v", err)
}
level, _ := logrus.ParseLevel(strLevel)
callLogger.logrus.SetLevel(level)
}
func checkLevel(lvl string) (error) {
switch strings.ToLower(lvl) {
case "error":
return nil
case "info":
return nil
}
return fmt.Errorf("not a valid calllog Level: %q", lvl)
}
func GetLevel() string {
return callLogger.logrus.GetLevel().String()
}
func getFormatter(loggerName string) *calllogformatter.Formatter {
if callFormatter != nil {
return callFormatter
}
callFormatter = &calllogformatter.Formatter{
TimestampFormat: "2006-01-02 15:04:05",
LogFormat: "[" + loggerName + "].[" + HostIPorName + "] %time% (%weekday%) %func% - %msg%\n",
}
return callFormatter
}
//=========================
type CLOUDLOGSCHEMA struct {
CloudOS CLOUD_OS // ex) AWS | AZURE | ALIBABA | GCP | OPENSTACK | CLOUDTWIN | CLOUDIT | DOCKER | NCP | MOCK
RegionZone string // ex) us-east1/us-east1-c
ResourceType RES_TYPE // ex) VMIMAGE | VMSPEC | VPCSUBNET | SECURITYGROUP | VMKEYPAIR | VM
ResourceName string // ex) vpc-01
CloudOSAPI string // ex) CreateKeyPair()
ElapsedTime string // ex) 2.0201 (sec)
ErrorMSG string // if success, ""
}
/* TBD or Do not support.
type VMLOGSCHEMA struct {
}
*/
func Start() time.Time {
return time.Now()
}
func Elapsed(start time.Time) string {
return fmt.Sprintf("%.4f", time.Since(start).Seconds())
}
func String(logInfo interface{}) string {
t := reflect.TypeOf(logInfo)
v := reflect.ValueOf(logInfo)
msg := ""
for idx:=0; idx < t.NumField(); idx++ {
typeOne := t.Field(idx)
one := v.Field(idx)
if idx < (t.NumField()-1) {
msg += fmt.Sprintf("\"%s\" : \"%s\", ", typeOne.Name, one)
} else {
msg += fmt.Sprintf("\"%s\" : \"%s\"", typeOne.Name, one)
}
}
return msg
}