78 lines
2.5 KiB
Go
78 lines
2.5 KiB
Go
// Copyright 2020-2022 the Pinniped contributors. All Rights Reserved.
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// SPDX-License-Identifier: Apache-2.0
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package plog
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import (
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"context"
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"fmt"
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"net/url"
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"sync"
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"github.com/go-logr/logr"
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"go.uber.org/zap"
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"k8s.io/component-base/logs"
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"k8s.io/klog/v2"
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)
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//nolint:gochecknoglobals
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var (
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// note that these globals have no locks on purpose - they are expected to be set at init and then again after config parsing.
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globalLevel zap.AtomicLevel
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globalLogger logr.Logger
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globalFlush func()
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// used as a temporary storage for a buffer per call of newLogr. see the init function below for more details.
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sinkMap sync.Map
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)
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//nolint:gochecknoinits
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func init() {
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// make sure we always have a functional global logger
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globalLevel = zap.NewAtomicLevelAt(0) // log at the 0 verbosity level to start with, i.e. the "always" logs
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// use json encoding to start with
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// the context here is just used for test injection and thus can be ignored
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log, flush, err := newLogr(context.Background(), "json", 0)
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if err != nil {
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panic(err) // default logging config must always work
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}
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setGlobalLoggers(log, flush)
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// this is a little crazy but zap's builder code does not allow us to directly specify what
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// writer we want to use as our log sink. to get around this limitation in tests, we use a
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// global map to temporarily hold the writer (the key is a random string that is generated
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// per invocation of newLogr). we register a fake "pinniped" scheme so that we can lookup
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// the writer via pinniped:///<per newLogr invocation random string>.
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if err := zap.RegisterSink("pinniped", func(u *url.URL) (zap.Sink, error) {
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value, ok := sinkMap.Load(u.Path)
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if !ok {
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return nil, fmt.Errorf("key %q not in global sink", u.Path)
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}
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return value.(zap.Sink), nil
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}); err != nil {
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panic(err) // custom sink must always work
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}
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}
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// Deprecated: Use New instead. This is meant for old code only.
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// New provides a more ergonomic API and correctly responds to global log config change.
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func Logr() logr.Logger {
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return globalLogger
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}
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func Setup() func() {
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logs.InitLogs()
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return func() {
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logs.FlushLogs()
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globalFlush()
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}
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}
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// setGlobalLoggers sets the plog and klog global loggers. it is *not* go routine safe.
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func setGlobalLoggers(log logr.Logger, flush func()) {
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// a contextual logger does its own level based enablement checks, which is true for all of our loggers
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klog.SetLoggerWithOptions(log, klog.ContextualLogger(true), klog.FlushLogger(flush))
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globalLogger = log
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globalFlush = flush
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}
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