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f5116cddb4
Enforce importas: - go.pinniped.dev/generated/latest/apis/supervisor/config/v1alpha1 - go.pinniped.dev/generated/latest/apis/supervisor/idp/v1alpha1
259 lines
8.8 KiB
Go
259 lines
8.8 KiB
Go
// Copyright 2020-2024 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 logr 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 (
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"os"
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"github.com/go-logr/logr"
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)
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const errorKey = "error" // this matches zapr's default for .Error calls (which is asserted via tests)
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// Logger implements the plog logging convention described above. The global functions in this package
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// such as Info should be used when one does not intend to write tests assertions for specific log messages.
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// If test assertions are desired, Logger should be passed in as an input. New should be used as the
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// production implementation and TestLogger should be used to write test assertions.
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type Logger interface {
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Error(msg string, err error, keysAndValues ...any)
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Warning(msg string, keysAndValues ...any)
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WarningErr(msg string, err error, keysAndValues ...any)
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Info(msg string, keysAndValues ...any)
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InfoErr(msg string, err error, keysAndValues ...any)
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Debug(msg string, keysAndValues ...any)
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DebugErr(msg string, err error, keysAndValues ...any)
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Trace(msg string, keysAndValues ...any)
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TraceErr(msg string, err error, keysAndValues ...any)
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All(msg string, keysAndValues ...any)
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Always(msg string, keysAndValues ...any)
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WithValues(keysAndValues ...any) Logger
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WithName(name string) Logger
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// does not include Fatal on purpose because that is not a method you should be using
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// for internal and test use only
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withDepth(d int) Logger
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withLogrMod(mod func(logr.Logger) logr.Logger) Logger
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}
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// MinLogger is the overlap between Logger and logr.Logger.
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type MinLogger interface {
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Info(msg string, keysAndValues ...any)
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}
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var _ Logger = pLogger{}
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var _, _, _ MinLogger = pLogger{}, logr.Logger{}, Logger(nil)
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type pLogger struct {
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mods []func(logr.Logger) logr.Logger
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depth int
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}
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func New() Logger {
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return pLogger{}
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}
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func (p pLogger) Error(msg string, err error, keysAndValues ...any) {
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p.logr().WithCallDepth(p.depth+1).Error(err, msg, keysAndValues...)
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}
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func (p pLogger) warningDepth(msg string, depth int, keysAndValues ...any) {
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if p.logr().V(klogLevelWarning).Enabled() {
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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([]any{"warning", true}, keysAndValues...)
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p.logr().V(klogLevelWarning).WithCallDepth(depth+1).Info(msg, keysAndValues...)
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}
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}
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func (p pLogger) Warning(msg string, keysAndValues ...any) {
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p.warningDepth(msg, p.depth+1, keysAndValues...)
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}
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func (p pLogger) WarningErr(msg string, err error, keysAndValues ...any) {
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p.warningDepth(msg, p.depth+1, append([]any{errorKey, err}, keysAndValues...)...)
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}
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func (p pLogger) infoDepth(msg string, depth int, keysAndValues ...any) {
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if p.logr().V(KlogLevelInfo).Enabled() {
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p.logr().V(KlogLevelInfo).WithCallDepth(depth+1).Info(msg, keysAndValues...)
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}
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}
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func (p pLogger) Info(msg string, keysAndValues ...any) {
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p.infoDepth(msg, p.depth+1, keysAndValues...)
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}
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func (p pLogger) InfoErr(msg string, err error, keysAndValues ...any) {
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p.infoDepth(msg, p.depth+1, append([]any{errorKey, err}, keysAndValues...)...)
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}
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func (p pLogger) debugDepth(msg string, depth int, keysAndValues ...any) {
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if p.logr().V(KlogLevelDebug).Enabled() {
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p.logr().V(KlogLevelDebug).WithCallDepth(depth+1).Info(msg, keysAndValues...)
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}
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}
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func (p pLogger) Debug(msg string, keysAndValues ...any) {
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p.debugDepth(msg, p.depth+1, keysAndValues...)
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}
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func (p pLogger) DebugErr(msg string, err error, keysAndValues ...any) {
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p.debugDepth(msg, p.depth+1, append([]any{errorKey, err}, keysAndValues...)...)
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}
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func (p pLogger) traceDepth(msg string, depth int, keysAndValues ...any) {
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if p.logr().V(KlogLevelTrace).Enabled() {
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p.logr().V(KlogLevelTrace).WithCallDepth(depth+1).Info(msg, keysAndValues...)
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}
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}
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func (p pLogger) Trace(msg string, keysAndValues ...any) {
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p.traceDepth(msg, p.depth+1, keysAndValues...)
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}
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func (p pLogger) TraceErr(msg string, err error, keysAndValues ...any) {
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p.traceDepth(msg, p.depth+1, append([]any{errorKey, err}, keysAndValues...)...)
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}
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func (p pLogger) All(msg string, keysAndValues ...any) {
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if p.logr().V(klogLevelAll).Enabled() {
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p.logr().V(klogLevelAll).WithCallDepth(p.depth+1).Info(msg, keysAndValues...)
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}
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}
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func (p pLogger) Always(msg string, keysAndValues ...any) {
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p.logr().WithCallDepth(p.depth+1).Info(msg, keysAndValues...)
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}
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func (p pLogger) WithValues(keysAndValues ...any) Logger {
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if len(keysAndValues) == 0 {
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return p
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}
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return p.withLogrMod(func(l logr.Logger) logr.Logger {
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return l.WithValues(keysAndValues...)
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})
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}
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func (p pLogger) WithName(name string) Logger {
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if len(name) == 0 {
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return p
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}
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return p.withLogrMod(func(l logr.Logger) logr.Logger {
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return l.WithName(name)
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})
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}
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func (p pLogger) withDepth(d int) Logger {
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out := p
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out.depth += d // out is a copy so this does not mutate p
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return out
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}
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func (p pLogger) withLogrMod(mod func(logr.Logger) logr.Logger) Logger {
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out := p // make a copy and carefully avoid mutating the mods slice
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mods := make([]func(logr.Logger) logr.Logger, 0, len(out.mods)+1)
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mods = append(mods, out.mods...)
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mods = append(mods, mod)
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out.mods = mods
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return out
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}
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func (p pLogger) logr() logr.Logger {
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l := Logr() // grab the current global logger and its current config
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for _, mod := range p.mods {
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l = mod(l) // and then update it with all modifications
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}
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return l // this logger is guaranteed to have the latest config and all modifications
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}
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var logger = New().withDepth(1) //nolint:gochecknoglobals
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func Error(msg string, err error, keysAndValues ...any) {
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logger.Error(msg, err, keysAndValues...)
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}
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func Warning(msg string, keysAndValues ...any) {
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logger.Warning(msg, keysAndValues...)
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}
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func WarningErr(msg string, err error, keysAndValues ...any) {
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logger.WarningErr(msg, err, keysAndValues...)
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}
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func Info(msg string, keysAndValues ...any) {
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logger.Info(msg, keysAndValues...)
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}
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func InfoErr(msg string, err error, keysAndValues ...any) {
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logger.InfoErr(msg, err, keysAndValues...)
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}
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func Debug(msg string, keysAndValues ...any) {
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logger.Debug(msg, keysAndValues...)
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}
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func DebugErr(msg string, err error, keysAndValues ...any) {
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logger.DebugErr(msg, err, keysAndValues...)
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}
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func Trace(msg string, keysAndValues ...any) {
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logger.Trace(msg, keysAndValues...)
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}
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func TraceErr(msg string, err error, keysAndValues ...any) {
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logger.TraceErr(msg, err, keysAndValues...)
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}
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func All(msg string, keysAndValues ...any) {
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logger.All(msg, keysAndValues...)
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}
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func Always(msg string, keysAndValues ...any) {
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logger.Always(msg, keysAndValues...)
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}
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func WithValues(keysAndValues ...any) Logger {
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// this looks weird but it is the same as New().WithValues(keysAndValues...) because it returns a new logger rooted at the call site
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return logger.withDepth(-1).WithValues(keysAndValues...)
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}
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func WithName(name string) Logger {
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// this looks weird but it is the same as New().WithName(name) because it returns a new logger rooted at the call site
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return logger.withDepth(-1).WithName(name)
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}
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func Fatal(err error, keysAndValues ...any) {
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logger.Error("unrecoverable error encountered", err, keysAndValues...)
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globalFlush()
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os.Exit(1)
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}
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