Logging structure refactor

This splits up pkg/runtime/log into pkg/log, pkg/internal/log, and
pkg/log/zap.

- pkg/log contains generic logging helpers, and the generic root logger
  It *only* depends on logr, and thus won't pull in Zap if you don't
  need it.

- pkg/internal/log contains the internal log handle (with the
  appropriate name).  Nothing outside CR should be logging with this
  handle anyway, so this enforces it.

- pkg/log/zap contains Zap-related setup code, and thus CR only has a
  dependency on Zap if you pull in this package.

- pkg/runtime/log remains as a deprecated package to ease refactoring
  and compatibility.  While practically a few types have been removed
  from this package, in reality most consumers shouldn't notice.

Author: DirectXMan12

pkg/internal/log/log.go

@@ -0,0 +1,35 @@
+/*
+Copyright 2018 The Kubernetes 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 contains utilities for fetching a new logger
+// when one is not already available.
+// Deprecated: use pkg/log
+package log
+
+import (
+	"github.com/go-logr/logr"
+
+	"sigs.k8s.io/controller-runtime/pkg/log"
+)
+
+var (
+	// RuntimeLog is a base parent logger for use inside controller-runtime.
+	RuntimeLog logr.Logger
+)
+
+func init() {
+	RuntimeLog = log.Log.WithName("controller-runtime")
+}

pkg/runtime/log/deleg.go renamed to pkg/log/deleg.go

@@ -0,0 +1,34 @@
+/*
+Copyright 2018 The Kubernetes 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 contains utilities for fetching a new logger
+// when one is not already available.
+// Deprecated: use pkg/log
+package log
+
+import (
+	"github.com/go-logr/logr"
+)
+
+// SetLogger sets a concrete logging implementation for all deferred Loggers.
+func SetLogger(l logr.Logger) {
+	Log.Fulfill(l)
+}
+
+// Log is the base logger used by kubebuilder.  It delegates
+// to another logr.Logger.  You *must* call SetLogger to
+// get any actual logging.
+var Log = NewDelegatingLogger(NullLogger{})

pkg/log/log.go

@@ -26,5 +26,5 @@ import (
 
 func TestSource(t *testing.T) {
 	RegisterFailHandler(Fail)
-	RunSpecsWithDefaultAndCustomReporters(t, "Runtime Log Suite", []Reporter{printer.NewlineReporter{}})
+	RunSpecsWithDefaultAndCustomReporters(t, "Log Suite", []Reporter{printer.NewlineReporter{}})
 }

pkg/runtime/log/log_suite_test.go renamed to pkg/log/log_suite_test.go

@@ -17,35 +17,12 @@ limitations under the License.
 package log
 
 import (
-	"bytes"
-	"encoding/json"
-	"io/ioutil"
 
 	"github.com/go-logr/logr"
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
-	kapi "k8s.io/api/core/v1"
-	"k8s.io/apimachinery/pkg/types"
 )
 
-// testStringer is a fmt.Stringer
-type testStringer struct{}
-
-func (testStringer) String() string {
-	return "value"
-}
-
-// fakeSyncWriter is a fake zap.SyncerWriter that lets us test if sync was called
-type fakeSyncWriter bool
-
-func (w *fakeSyncWriter) Write(p []byte) (int, error) {
-	return len(p), nil
-}
-func (w *fakeSyncWriter) Sync() error {
-	*w = true
-	return nil
-}
-
 // logInfo is the information for a particular fakeLogger message
 type logInfo struct {
 	name []string
@@ -112,7 +89,7 @@ func (f *fakeLogger) Info(msg string, vals ...interface{}) {
 func (f *fakeLogger) Enabled() bool             { return true }
 func (f *fakeLogger) V(lvl int) logr.InfoLogger { return f }
 
-var _ = Describe("runtime log", func() {
+var _ = Describe("logging", func() {
 
 	Describe("top-level logger", func() {
 		It("hold newly created loggers until a logger is set", func() {
@@ -238,122 +215,4 @@ var _ = Describe("runtime log", func() {
 			))
 		})
 	})
-
-	Describe("Zap logger setup", func() {
-		Context("with the default output", func() {
-			It("shouldn't fail when setting up production", func() {
-				Expect(ZapLogger(false)).NotTo(BeNil())
-			})
-
-			It("shouldn't fail when setting up development", func() {
-				Expect(ZapLogger(true)).NotTo(BeNil())
-			})
-		})
-
-		Context("with custom non-sync output", func() {
-			It("shouldn't fail when setting up production", func() {
-				Expect(ZapLoggerTo(ioutil.Discard, false)).NotTo(BeNil())
-			})
-
-			It("shouldn't fail when setting up development", func() {
-				Expect(ZapLoggerTo(ioutil.Discard, true)).NotTo(BeNil())
-			})
-		})
-
-		Context("when logging kubernetes objects", func() {
-			var logOut *bytes.Buffer
-			var logger logr.Logger
-
-			BeforeEach(func() {
-				logOut = new(bytes.Buffer)
-				By("setting up the logger")
-				// use production settings (false) to get just json output
-				logger = ZapLoggerTo(logOut, false)
-			})
-
-			It("should log a standard namespaced Kubernetes object name and namespace", func() {
-				pod := &kapi.Pod{}
-				pod.Name = "some-pod"
-				pod.Namespace = "some-ns"
-				logger.Info("here's a kubernetes object", "thing", pod)
-
-				outRaw := logOut.Bytes()
-				res := map[string]interface{}{}
-				Expect(json.Unmarshal(outRaw, &res)).To(Succeed())
-
-				Expect(res).To(HaveKeyWithValue("thing", map[string]interface{}{
-					"name":      pod.Name,
-					"namespace": pod.Namespace,
-				}))
-			})
-
-			It("should work fine with normal stringers", func() {
-				logger.Info("here's a non-kubernetes stringer", "thing", testStringer{})
-				outRaw := logOut.Bytes()
-				res := map[string]interface{}{}
-				Expect(json.Unmarshal(outRaw, &res)).To(Succeed())
-
-				Expect(res).To(HaveKeyWithValue("thing", "value"))
-			})
-
-			It("should log a standard non-namespaced Kubernetes object name", func() {
-				node := &kapi.Node{}
-				node.Name = "some-node"
-				logger.Info("here's a kubernetes object", "thing", node)
-
-				outRaw := logOut.Bytes()
-				res := map[string]interface{}{}
-				Expect(json.Unmarshal(outRaw, &res)).To(Succeed())
-
-				Expect(res).To(HaveKeyWithValue("thing", map[string]interface{}{
-					"name": node.Name,
-				}))
-			})
-
-			It("should log a standard Kubernetes object's kind, if set", func() {
-				node := &kapi.Node{}
-				node.Name = "some-node"
-				node.APIVersion = "v1"
-				node.Kind = "Node"
-				logger.Info("here's a kubernetes object", "thing", node)
-
-				outRaw := logOut.Bytes()
-				res := map[string]interface{}{}
-				Expect(json.Unmarshal(outRaw, &res)).To(Succeed())
-
-				Expect(res).To(HaveKeyWithValue("thing", map[string]interface{}{
-					"name":       node.Name,
-					"apiVersion": "v1",
-					"kind":       "Node",
-				}))
-			})
-
-			It("should log a standard non-namespaced NamespacedName name", func() {
-				name := types.NamespacedName{Name: "some-node"}
-				logger.Info("here's a kubernetes object", "thing", name)
-
-				outRaw := logOut.Bytes()
-				res := map[string]interface{}{}
-				Expect(json.Unmarshal(outRaw, &res)).To(Succeed())
-
-				Expect(res).To(HaveKeyWithValue("thing", map[string]interface{}{
-					"name": name.Name,
-				}))
-			})
-
-			It("should log a standard namespaced NamespacedName name and namespace", func() {
-				name := types.NamespacedName{Name: "some-pod", Namespace: "some-ns"}
-				logger.Info("here's a kubernetes object", "thing", name)
-
-				outRaw := logOut.Bytes()
-				res := map[string]interface{}{}
-				Expect(json.Unmarshal(outRaw, &res)).To(Succeed())
-
-				Expect(res).To(HaveKeyWithValue("thing", map[string]interface{}{
-					"name":      name.Name,
-					"namespace": name.Namespace,
-				}))
-			})
-		})
-	})
 })

pkg/runtime/log/log_test.go renamed to pkg/log/log_test.go

@@ -1,5 +1,5 @@
 /*
-Copyright 2018 The Kubernetes Authors.
+Copyright 2019 The Kubernetes Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -14,9 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// Package log contains utilities for fetching a new logger
-// when one is not already available.
-package log
+package zap
 
 import (
 	"fmt"
@@ -127,3 +125,4 @@ func (k *KubeAwareEncoder) EncodeEntry(entry zapcore.Entry, fields []zapcore.Fie
 
 	return k.Encoder.EncodeEntry(entry, fields)
 }
+

pkg/runtime/log/null.go renamed to pkg/log/null.go

@@ -0,0 +1,68 @@
+/*
+Copyright 2019 The Kubernetes 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 zap contains helpers for setting up a new logr.Logger instance
+// using the Zap logging framework.
+package zap
+
+import (
+	"io"
+	"os"
+	"time"
+
+	"github.com/go-logr/logr"
+	"github.com/go-logr/zapr"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+)
+
+// Logger is a Logger implementation.
+// If development is true, a Zap development config will be used
+// (stacktraces on warnings, no sampling), otherwise a Zap production
+// config will be used (stacktraces on errors, sampling).
+func Logger(development bool) logr.Logger {
+	return LoggerTo(os.Stderr, development)
+}
+
+// LoggerTo returns a new Logger implementation using Zap which logs
+// to the given destination, instead of stderr.  It otherwise behaves like
+// ZapLogger.
+func LoggerTo(destWriter io.Writer, development bool) logr.Logger {
+	// this basically mimics New<type>Config, but with a custom sink
+	sink := zapcore.AddSync(destWriter)
+
+	var enc zapcore.Encoder
+	var lvl zap.AtomicLevel
+	var opts []zap.Option
+	if development {
+		encCfg := zap.NewDevelopmentEncoderConfig()
+		enc = zapcore.NewConsoleEncoder(encCfg)
+		lvl = zap.NewAtomicLevelAt(zap.DebugLevel)
+		opts = append(opts, zap.Development(), zap.AddStacktrace(zap.ErrorLevel))
+	} else {
+		encCfg := zap.NewProductionEncoderConfig()
+		enc = zapcore.NewJSONEncoder(encCfg)
+		lvl = zap.NewAtomicLevelAt(zap.InfoLevel)
+		opts = append(opts, zap.AddStacktrace(zap.WarnLevel),
+			zap.WrapCore(func(core zapcore.Core) zapcore.Core {
+				return zapcore.NewSampler(core, time.Second, 100, 100)
+			}))
+	}
+	opts = append(opts, zap.AddCallerSkip(1), zap.ErrorOutput(sink))
+	log := zap.New(zapcore.NewCore(&KubeAwareEncoder{Encoder: enc, Verbose: development}, sink, lvl))
+	log = log.WithOptions(opts...)
+	return zapr.NewLogger(log)
+}

pkg/runtime/log/kube_helpers.go renamed to pkg/log/zap/kube_helpers.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2018 The Kubernetes 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 zap
+
+import (
+	"testing"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	"sigs.k8s.io/controller-runtime/pkg/envtest/printer"
+)
+
+func TestSource(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecsWithDefaultAndCustomReporters(t, "Zap Log Suite", []Reporter{printer.NewlineReporter{}})
+}