135 lines
3.6 KiB
Go
135 lines
3.6 KiB
Go
/*
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© Copyright IBM Corporation 2017, 2018
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package main
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import (
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"context"
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"encoding/json"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"sync"
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"github.com/ibm-messaging/mq-container/internal/mqini"
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"github.com/sirupsen/logrus"
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log "github.com/sirupsen/logrus"
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)
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var debug = false
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// timestampFormat matches the format used by MQ messages (includes milliseconds)
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const timestampFormat string = "2006-01-02T15:04:05.000Z07:00"
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type simpleTextFormatter struct {
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}
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func (f *simpleTextFormatter) Format(entry *logrus.Entry) ([]byte, error) {
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// If debugging, and a prefix, but only for this formatter.
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if entry.Level == logrus.DebugLevel {
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entry.Message = "DEBUG: " + entry.Message
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}
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// Use a simple format, with a timestamp
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return []byte(formatSimple(entry.Time.Format(timestampFormat), entry.Message)), nil
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}
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func logDebug(args ...interface{}) {
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if debug {
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log.Debug(args)
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}
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}
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func logDebugf(format string, args ...interface{}) {
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if debug {
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log.Debugf(format, args...)
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}
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}
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func logTerminationf(format string, args ...interface{}) {
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logTermination(fmt.Sprintf(format, args))
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}
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func logTermination(args ...interface{}) {
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msg := fmt.Sprint(args)
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// Write the message to the termination log. This is the default place
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// that Kubernetes will look for termination information.
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log.Debugf("Writing termination message: %v", msg)
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err := ioutil.WriteFile("/dev/termination-log", []byte(msg), 0660)
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if err != nil {
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log.Debug(err)
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}
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log.Error(msg)
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}
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func getLogFormat() string {
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return os.Getenv("LOG_FORMAT")
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}
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func formatSimple(datetime string, message string) string {
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return fmt.Sprintf("%v %v\n", datetime, message)
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}
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func mirrorLogs(ctx context.Context, wg *sync.WaitGroup, name string, fromStart bool, mf mirrorFunc) (chan error, error) {
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// Always use the JSON log as the source
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// Put the queue manager name in quotes to handle cases like name=..
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qm, err := mqini.GetQueueManager(name)
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if err != nil {
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logDebug(err)
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return nil, err
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}
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f := filepath.Join(mqini.GetErrorLogDirectory(qm), "AMQERR01.json")
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return mirrorLog(ctx, wg, f, fromStart, mf)
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}
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func configureDebugLogger() {
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debugEnv, ok := os.LookupEnv("DEBUG")
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if ok && (debugEnv == "true" || debugEnv == "1") {
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debug = true
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logrus.SetLevel(logrus.DebugLevel)
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logDebug("Debug mode enabled")
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}
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}
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func configureLogger() (mirrorFunc, error) {
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// Set the simple formatter by default
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log.SetFormatter(new(simpleTextFormatter))
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f := getLogFormat()
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switch f {
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case "json":
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formatter := logrus.JSONFormatter{
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FieldMap: logrus.FieldMap{
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logrus.FieldKeyMsg: "message",
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logrus.FieldKeyLevel: "ibm_level",
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logrus.FieldKeyTime: "ibm_datetime",
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},
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TimestampFormat: timestampFormat,
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}
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logrus.SetFormatter(&formatter)
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return func(msg string) {
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fmt.Println(msg)
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}, nil
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case "simple":
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return func(msg string) {
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// Parse the JSON message, and print a simplified version
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var obj map[string]interface{}
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json.Unmarshal([]byte(msg), &obj)
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fmt.Printf(formatSimple(obj["ibm_datetime"].(string), obj["message"].(string)))
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}, nil
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default:
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return nil, fmt.Errorf("invalid value for LOG_FORMAT: %v", f)
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}
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}
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