c2262773e6
Signed-off-by: Ryan Richard <richardry@vmware.com>
82 lines
3.8 KiB
Go
82 lines
3.8 KiB
Go
// Copyright 2020 the Pinniped contributors. All Rights Reserved.
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// SPDX-License-Identifier: Apache-2.0
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// Package plog implements a thin layer over klog to help enforce pinniped's logging convention.
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// Logs are always structured as a constant message with key and value pairs of related metadata.
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//
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// The logging levels in order of increasing verbosity are:
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// error, warning, info, debug, trace and all.
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//
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// error and warning logs are always emitted (there is no way for the end user to disable them),
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// and thus should be used sparingly. Ideally, logs at these levels should be actionable.
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//
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// info should be reserved for "nice to know" information. It should be possible to run a production
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// pinniped server at the info log level with no performance degradation due to high log volume.
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// debug should be used for information targeted at developers and to aid in support cases. Care must
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// be taken at this level to not leak any secrets into the log stream. That is, even though debug may
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// cause performance issues in production, it must not cause security issues in production.
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//
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// trace should be used to log information related to timing (i.e. the time it took a controller to sync).
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// Just like debug, trace should not leak secrets into the log stream. trace will likely leak information
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// about the current state of the process, but that, along with performance degradation, is expected.
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//
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// all is reserved for the most verbose and security sensitive information. At this level, full request
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// metadata such as headers and parameters along with the body may be logged. This level is completely
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// unfit for production use both from a performance and security standpoint. Using it is generally an
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// act of desperation to determine why the system is broken.
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package plog
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import "k8s.io/klog/v2"
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const errorKey = "error"
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// Use Error to log an unexpected system error.
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func Error(msg string, err error, keysAndValues ...interface{}) {
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klog.ErrorS(err, msg, keysAndValues...)
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}
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func Warning(msg string, keysAndValues ...interface{}) {
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// klog's structured logging has no concept of a warning (i.e. no WarningS function)
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// Thus we use info at log level zero as a proxy
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// klog's info logs have an I prefix and its warning logs have a W prefix
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// Since we lose the W prefix by using InfoS, just add a key to make these easier to find
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keysAndValues = append([]interface{}{"warning", "true"}, keysAndValues...)
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klog.V(klogLevelWarning).InfoS(msg, keysAndValues...)
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}
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// Use WarningErr to issue a Warning message with an error object as part of the message.
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func WarningErr(msg string, err error, keysAndValues ...interface{}) {
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Warning(msg, append([]interface{}{errorKey, err}, keysAndValues)...)
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}
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func Info(msg string, keysAndValues ...interface{}) {
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klog.V(klogLevelInfo).InfoS(msg, keysAndValues...)
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}
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// Use InfoErr to log an expected error, e.g. validation failure of an http parameter.
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func InfoErr(msg string, err error, keysAndValues ...interface{}) {
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Info(msg, append([]interface{}{errorKey, err}, keysAndValues)...)
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}
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func Debug(msg string, keysAndValues ...interface{}) {
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klog.V(klogLevelDebug).InfoS(msg, keysAndValues...)
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}
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// Use DebugErr to issue a Debug message with an error object as part of the message.
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func DebugErr(msg string, err error, keysAndValues ...interface{}) {
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Debug(msg, append([]interface{}{errorKey, err}, keysAndValues)...)
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}
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func Trace(msg string, keysAndValues ...interface{}) {
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klog.V(klogLevelTrace).InfoS(msg, keysAndValues...)
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}
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// Use TraceErr to issue a Trace message with an error object as part of the message.
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func TraceErr(msg string, err error, keysAndValues ...interface{}) {
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Trace(msg, append([]interface{}{errorKey, err}, keysAndValues)...)
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}
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func All(msg string, keysAndValues ...interface{}) {
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klog.V(klogLevelAll).InfoS(msg, keysAndValues...)
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}
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