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Merge pull request #390 from royeo/feature/replace-level-pkg

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refactor: replace level pkg
This commit is contained in:
Matthias Rampke 2021-09-01 15:08:40 +02:00 committed by GitHub
commit 6c43ebbc79
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GPG key ID: 4AEE18F83AFDEB23
8 changed files with 218 additions and 6 deletions
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6
main.go
View file

@ -25,7 +25,6 @@ import (
"syscall"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/prometheus/common/promlog"
@ -36,6 +35,7 @@ import (
"github.com/prometheus/statsd_exporter/pkg/address"
"github.com/prometheus/statsd_exporter/pkg/event"
"github.com/prometheus/statsd_exporter/pkg/exporter"
"github.com/prometheus/statsd_exporter/pkg/level"
"github.com/prometheus/statsd_exporter/pkg/line"
"github.com/prometheus/statsd_exporter/pkg/listener"
"github.com/prometheus/statsd_exporter/pkg/mapper"
@ -303,6 +303,10 @@ func main() {
kingpin.HelpFlag.Short('h')
kingpin.Parse()
logger := promlog.New(promlogConfig)
if err := level.SetLogLevel(promlogConfig.Level.String()); err != nil {
level.Error(logger).Log("msg", "failed to set log level", "error", err)
os.Exit(1)
}
parser := line.NewParser()
if *dogstatsdTagsEnabled {

2
pkg/exporter/exporter.go
View file

@ -18,11 +18,11 @@ import (
"time"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/statsd_exporter/pkg/clock"
"github.com/prometheus/statsd_exporter/pkg/event"
"github.com/prometheus/statsd_exporter/pkg/level"
"github.com/prometheus/statsd_exporter/pkg/mapper"
"github.com/prometheus/statsd_exporter/pkg/registry"
)

97
pkg/level/level.go Normal file
View file

@ -0,0 +1,97 @@
// Copyright 2021 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 level
import (
"fmt"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
)
var logLevel = LevelInfo
// A Level is a logging priority. Higher levels are more important.
type Level int
const (
// LevelDebug logs are typically voluminous, and are usually disabled in
// production.
LevelDebug Level = iota
// LevelInfo is the default logging priority.
LevelInfo
// LevelWarn logs are more important than Info, but don't need individual
// human review.
LevelWarn
// LevelError logs are high-priority. If an application is running smoothly,
// it shouldn't generate any error-level logs.
LevelError
)
var emptyLogger = &EmptyLogger{}
type EmptyLogger struct{}
func (l *EmptyLogger) Log(keyvals ...interface{}) error {
return nil
}
// SetLogLevel sets the log level.
func SetLogLevel(level string) error {
switch level {
case "debug":
logLevel = LevelDebug
case "info":
logLevel = LevelInfo
case "warn":
logLevel = LevelWarn
case "error":
logLevel = LevelError
default:
return fmt.Errorf("unrecognized log level %s", level)
}
return nil
}
// Error returns a logger that includes a Key/ErrorValue pair.
func Error(logger log.Logger) log.Logger {
if logLevel <= LevelError {
return level.Error(logger)
}
return emptyLogger
}
// Warn returns a logger that includes a Key/WarnValue pair.
func Warn(logger log.Logger) log.Logger {
if logLevel <= LevelWarn {
return level.Warn(logger)
}
return emptyLogger
}
// Info returns a logger that includes a Key/InfoValue pair.
func Info(logger log.Logger) log.Logger {
if logLevel <= LevelInfo {
return level.Info(logger)
}
return emptyLogger
}
// Debug returns a logger that includes a Key/DebugValue pair.
func Debug(logger log.Logger) log.Logger {
if logLevel <= LevelDebug {
return level.Debug(logger)
}
return emptyLogger
}

110
pkg/level/level_test.go Normal file
View file

@ -0,0 +1,110 @@
// Copyright 2021 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 level
import (
"bytes"
"strings"
"testing"
"github.com/go-kit/log"
)
func TestSetLogLevel(t *testing.T) {
tests := []struct {
name string
level string
logLevel Level
wantErr bool
}{
{"wrong level", "foo", LevelInfo, true},
{"level debug", "debug", LevelDebug, false},
{"level info", "info", LevelInfo, false},
{"level warn", "warn", LevelWarn, false},
{"level error", "error", LevelError, false},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if err := SetLogLevel(tt.level); (err != nil) != tt.wantErr {
t.Fatalf("Expected log level to be set successfully, but got %v", err)
}
if tt.logLevel != logLevel {
t.Fatalf("Expected log level %v, but got %v", tt.logLevel, logLevel)
}
})
}
}
func TestVariousLevels(t *testing.T) {
tests := []struct {
name string
level string
want string
}{
{
"level debug",
"debug",
strings.Join([]string{
"level=debug log=debug",
"level=info log=info",
"level=warn log=warn",
"level=error log=error",
}, "\n"),
},
{
"level info",
"info",
strings.Join([]string{
"level=info log=info",
"level=warn log=warn",
"level=error log=error",
}, "\n"),
},
{
"level warn",
"warn",
strings.Join([]string{
"level=warn log=warn",
"level=error log=error",
}, "\n"),
},
{
"level error",
"error",
strings.Join([]string{
"level=error log=error",
}, "\n"),
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
var buf bytes.Buffer
logger := log.NewLogfmtLogger(&buf)
if err := SetLogLevel(tt.level); err != nil {
t.Fatalf("Expected log level to be set successfully, but got %v", err)
}
Debug(logger).Log("log", "debug")
Info(logger).Log("log", "info")
Warn(logger).Log("log", "warn")
Error(logger).Log("log", "error")
got := strings.TrimSpace(buf.String())
if tt.want != got {
t.Fatalf("Expected log output %v, but got %v", tt.want, got)
}
})
}
}

2
pkg/line/line.go
View file

@ -20,10 +20,10 @@ import (
"unicode/utf8"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/statsd_exporter/pkg/event"
"github.com/prometheus/statsd_exporter/pkg/level"
"github.com/prometheus/statsd_exporter/pkg/mapper"
)

2
pkg/listener/listener.go
View file

@ -21,10 +21,10 @@ import (
"strings"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/statsd_exporter/pkg/event"
"github.com/prometheus/statsd_exporter/pkg/level"
)
type Parser interface {

3
pkg/mapper/fsm/fsm.go
View file

@ -18,7 +18,8 @@ import (
"strings"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/prometheus/statsd_exporter/pkg/level"
)
type mappingState struct {

2
pkg/mapper/mapper.go
View file

@ -21,10 +21,10 @@ import (
"time"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/prometheus/client_golang/prometheus"
yaml "gopkg.in/yaml.v2"
"github.com/prometheus/statsd_exporter/pkg/level"
"github.com/prometheus/statsd_exporter/pkg/mapper/fsm"
)