From 7961599b2e41c71720a42b3bfde641f7529f05fe Mon Sep 17 00:00:00 2001 From: Corey Hulen Date: Tue, 22 Nov 2016 11:05:54 -0800 Subject: PLT-4357 adding performance monitoring (#4622) * WIP * WIP * Adding metrics collection * updating vendor packages * Adding metrics to config * Adding admin console page for perf monitoring * Updating glide * switching to tylerb/graceful --- vendor/github.com/prometheus/common/log/log.go | 365 +++++++++++++++++++++++++ 1 file changed, 365 insertions(+) create mode 100644 vendor/github.com/prometheus/common/log/log.go (limited to 'vendor/github.com/prometheus/common/log/log.go') diff --git a/vendor/github.com/prometheus/common/log/log.go b/vendor/github.com/prometheus/common/log/log.go new file mode 100644 index 000000000..efad4842f --- /dev/null +++ b/vendor/github.com/prometheus/common/log/log.go @@ -0,0 +1,365 @@ +// Copyright 2015 The Prometheus Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package log + +import ( + "flag" + "fmt" + "io" + "io/ioutil" + "log" + "net/url" + "os" + "runtime" + "strconv" + "strings" + + "github.com/Sirupsen/logrus" +) + +type levelFlag string + +// String implements flag.Value. +func (f levelFlag) String() string { + return fmt.Sprintf("%q", string(f)) +} + +// Set implements flag.Value. +func (f levelFlag) Set(level string) error { + l, err := logrus.ParseLevel(level) + if err != nil { + return err + } + origLogger.Level = l + return nil +} + +// setSyslogFormatter is nil if the target architecture does not support syslog. +var setSyslogFormatter func(string, string) error + +// setEventlogFormatter is nil if the target OS does not support Eventlog (i.e., is not Windows). +var setEventlogFormatter func(string, bool) error + +func setJSONFormatter() { + origLogger.Formatter = &logrus.JSONFormatter{} +} + +type logFormatFlag url.URL + +// String implements flag.Value. +func (f logFormatFlag) String() string { + u := url.URL(f) + return fmt.Sprintf("%q", u.String()) +} + +// Set implements flag.Value. +func (f logFormatFlag) Set(format string) error { + u, err := url.Parse(format) + if err != nil { + return err + } + if u.Scheme != "logger" { + return fmt.Errorf("invalid scheme %s", u.Scheme) + } + jsonq := u.Query().Get("json") + if jsonq == "true" { + setJSONFormatter() + } + + switch u.Opaque { + case "syslog": + if setSyslogFormatter == nil { + return fmt.Errorf("system does not support syslog") + } + appname := u.Query().Get("appname") + facility := u.Query().Get("local") + return setSyslogFormatter(appname, facility) + case "eventlog": + if setEventlogFormatter == nil { + return fmt.Errorf("system does not support eventlog") + } + name := u.Query().Get("name") + debugAsInfo := false + debugAsInfoRaw := u.Query().Get("debugAsInfo") + if parsedDebugAsInfo, err := strconv.ParseBool(debugAsInfoRaw); err == nil { + debugAsInfo = parsedDebugAsInfo + } + return setEventlogFormatter(name, debugAsInfo) + case "stdout": + origLogger.Out = os.Stdout + case "stderr": + origLogger.Out = os.Stderr + default: + return fmt.Errorf("unsupported logger %q", u.Opaque) + } + return nil +} + +func init() { + AddFlags(flag.CommandLine) +} + +// AddFlags adds the flags used by this package to the given FlagSet. That's +// useful if working with a custom FlagSet. The init function of this package +// adds the flags to flag.CommandLine anyway. Thus, it's usually enough to call +// flag.Parse() to make the logging flags take effect. +func AddFlags(fs *flag.FlagSet) { + fs.Var( + levelFlag(origLogger.Level.String()), + "log.level", + "Only log messages with the given severity or above. Valid levels: [debug, info, warn, error, fatal]", + ) + fs.Var( + logFormatFlag(url.URL{Scheme: "logger", Opaque: "stderr"}), + "log.format", + `Set the log target and format. Example: "logger:syslog?appname=bob&local=7" or "logger:stdout?json=true"`, + ) +} + +// Logger is the interface for loggers used in the Prometheus components. +type Logger interface { + Debug(...interface{}) + Debugln(...interface{}) + Debugf(string, ...interface{}) + + Info(...interface{}) + Infoln(...interface{}) + Infof(string, ...interface{}) + + Warn(...interface{}) + Warnln(...interface{}) + Warnf(string, ...interface{}) + + Error(...interface{}) + Errorln(...interface{}) + Errorf(string, ...interface{}) + + Fatal(...interface{}) + Fatalln(...interface{}) + Fatalf(string, ...interface{}) + + With(key string, value interface{}) Logger +} + +type logger struct { + entry *logrus.Entry +} + +func (l logger) With(key string, value interface{}) Logger { + return logger{l.entry.WithField(key, value)} +} + +// Debug logs a message at level Debug on the standard logger. +func (l logger) Debug(args ...interface{}) { + l.sourced().Debug(args...) +} + +// Debug logs a message at level Debug on the standard logger. +func (l logger) Debugln(args ...interface{}) { + l.sourced().Debugln(args...) +} + +// Debugf logs a message at level Debug on the standard logger. +func (l logger) Debugf(format string, args ...interface{}) { + l.sourced().Debugf(format, args...) +} + +// Info logs a message at level Info on the standard logger. +func (l logger) Info(args ...interface{}) { + l.sourced().Info(args...) +} + +// Info logs a message at level Info on the standard logger. +func (l logger) Infoln(args ...interface{}) { + l.sourced().Infoln(args...) +} + +// Infof logs a message at level Info on the standard logger. +func (l logger) Infof(format string, args ...interface{}) { + l.sourced().Infof(format, args...) +} + +// Warn logs a message at level Warn on the standard logger. +func (l logger) Warn(args ...interface{}) { + l.sourced().Warn(args...) +} + +// Warn logs a message at level Warn on the standard logger. +func (l logger) Warnln(args ...interface{}) { + l.sourced().Warnln(args...) +} + +// Warnf logs a message at level Warn on the standard logger. +func (l logger) Warnf(format string, args ...interface{}) { + l.sourced().Warnf(format, args...) +} + +// Error logs a message at level Error on the standard logger. +func (l logger) Error(args ...interface{}) { + l.sourced().Error(args...) +} + +// Error logs a message at level Error on the standard logger. +func (l logger) Errorln(args ...interface{}) { + l.sourced().Errorln(args...) +} + +// Errorf logs a message at level Error on the standard logger. +func (l logger) Errorf(format string, args ...interface{}) { + l.sourced().Errorf(format, args...) +} + +// Fatal logs a message at level Fatal on the standard logger. +func (l logger) Fatal(args ...interface{}) { + l.sourced().Fatal(args...) +} + +// Fatal logs a message at level Fatal on the standard logger. +func (l logger) Fatalln(args ...interface{}) { + l.sourced().Fatalln(args...) +} + +// Fatalf logs a message at level Fatal on the standard logger. +func (l logger) Fatalf(format string, args ...interface{}) { + l.sourced().Fatalf(format, args...) +} + +// sourced adds a source field to the logger that contains +// the file name and line where the logging happened. +func (l logger) sourced() *logrus.Entry { + _, file, line, ok := runtime.Caller(2) + if !ok { + file = "" + line = 1 + } else { + slash := strings.LastIndex(file, "/") + file = file[slash+1:] + } + return l.entry.WithField("source", fmt.Sprintf("%s:%d", file, line)) +} + +var origLogger = logrus.New() +var baseLogger = logger{entry: logrus.NewEntry(origLogger)} + +// Base returns the default Logger logging to +func Base() Logger { + return baseLogger +} + +// NewLogger returns a new Logger logging to out. +func NewLogger(w io.Writer) Logger { + l := logrus.New() + l.Out = w + return logger{entry: logrus.NewEntry(l)} +} + +// NewNopLogger returns a logger that discards all log messages. +func NewNopLogger() Logger { + l := logrus.New() + l.Out = ioutil.Discard + return logger{entry: logrus.NewEntry(l)} +} + +// With adds a field to the logger. +func With(key string, value interface{}) Logger { + return baseLogger.With(key, value) +} + +// Debug logs a message at level Debug on the standard logger. +func Debug(args ...interface{}) { + baseLogger.sourced().Debug(args...) +} + +// Debugln logs a message at level Debug on the standard logger. +func Debugln(args ...interface{}) { + baseLogger.sourced().Debugln(args...) +} + +// Debugf logs a message at level Debug on the standard logger. +func Debugf(format string, args ...interface{}) { + baseLogger.sourced().Debugf(format, args...) +} + +// Info logs a message at level Info on the standard logger. +func Info(args ...interface{}) { + baseLogger.sourced().Info(args...) +} + +// Infoln logs a message at level Info on the standard logger. +func Infoln(args ...interface{}) { + baseLogger.sourced().Infoln(args...) +} + +// Infof logs a message at level Info on the standard logger. +func Infof(format string, args ...interface{}) { + baseLogger.sourced().Infof(format, args...) +} + +// Warn logs a message at level Warn on the standard logger. +func Warn(args ...interface{}) { + baseLogger.sourced().Warn(args...) +} + +// Warnln logs a message at level Warn on the standard logger. +func Warnln(args ...interface{}) { + baseLogger.sourced().Warnln(args...) +} + +// Warnf logs a message at level Warn on the standard logger. +func Warnf(format string, args ...interface{}) { + baseLogger.sourced().Warnf(format, args...) +} + +// Error logs a message at level Error on the standard logger. +func Error(args ...interface{}) { + baseLogger.sourced().Error(args...) +} + +// Errorln logs a message at level Error on the standard logger. +func Errorln(args ...interface{}) { + baseLogger.sourced().Errorln(args...) +} + +// Errorf logs a message at level Error on the standard logger. +func Errorf(format string, args ...interface{}) { + baseLogger.sourced().Errorf(format, args...) +} + +// Fatal logs a message at level Fatal on the standard logger. +func Fatal(args ...interface{}) { + baseLogger.sourced().Fatal(args...) +} + +// Fatalln logs a message at level Fatal on the standard logger. +func Fatalln(args ...interface{}) { + baseLogger.sourced().Fatalln(args...) +} + +// Fatalf logs a message at level Fatal on the standard logger. +func Fatalf(format string, args ...interface{}) { + baseLogger.sourced().Fatalf(format, args...) +} + +type errorLogWriter struct{} + +func (errorLogWriter) Write(b []byte) (int, error) { + baseLogger.sourced().Error(string(b)) + return len(b), nil +} + +// NewErrorLogger returns a log.Logger that is meant to be used +// in the ErrorLog field of an http.Server to log HTTP server errors. +func NewErrorLogger() *log.Logger { + return log.New(&errorLogWriter{}, "", 0) +} -- cgit v1.2.3-1-g7c22