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// Copyright 2021 The Matrix.org Foundation C.I.C.
//
// 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.
//go:build !windows
// +build !windows
package internal
import (
"io/ioutil"
"log/syslog"
"github.com/MFAshby/stdemuxerhook"
"github.com/matrix-org/dendrite/setup/config"
"github.com/sirupsen/logrus"
lSyslog "github.com/sirupsen/logrus/hooks/syslog"
)
// SetupHookLogging configures the logging hooks defined in the configuration.
// If something fails here it means that the logging was improperly configured,
// so we just exit with the error
func SetupHookLogging(hooks []config.LogrusHook, componentName string) {
stdLogAdded := false
for _, hook := range hooks {
// Check we received a proper logging level
level, err := logrus.ParseLevel(hook.Level)
if err != nil {
logrus.Fatalf("Unrecognised logging level %s: %q", hook.Level, err)
}
// Perform a first filter on the logs according to the lowest level of all
// (Eg: If we have hook for info and above, prevent logrus from processing debug logs)
if logrus.GetLevel() < level {
logrus.SetLevel(level)
}
switch hook.Type {
case "file":
checkFileHookParams(hook.Params)
setupFileHook(hook, level, componentName)
case "syslog":
checkSyslogHookParams(hook.Params)
setupSyslogHook(hook, level, componentName)
case "std":
setupStdLogHook(level)
stdLogAdded = true
default:
logrus.Fatalf("Unrecognised logging hook type: %s", hook.Type)
}
}
if !stdLogAdded {
setupStdLogHook(logrus.InfoLevel)
}
// Hooks are now configured for stdout/err, so throw away the default logger output
logrus.SetOutput(ioutil.Discard)
}
func checkSyslogHookParams(params map[string]interface{}) {
addr, ok := params["address"]
if !ok {
logrus.Fatalf("Expecting a parameter \"address\" for logging hook of type \"syslog\"")
}
if _, ok := addr.(string); !ok {
logrus.Fatalf("Parameter \"address\" for logging hook of type \"syslog\" should be a string")
}
proto, ok2 := params["protocol"]
if !ok2 {
logrus.Fatalf("Expecting a parameter \"protocol\" for logging hook of type \"syslog\"")
}
if _, ok2 := proto.(string); !ok2 {
logrus.Fatalf("Parameter \"protocol\" for logging hook of type \"syslog\" should be a string")
}
}
func setupStdLogHook(level logrus.Level) {
logrus.AddHook(&logLevelHook{level, stdemuxerhook.New(logrus.StandardLogger())})
}
func setupSyslogHook(hook config.LogrusHook, level logrus.Level, componentName string) {
syslogHook, err := lSyslog.NewSyslogHook(hook.Params["protocol"].(string), hook.Params["address"].(string), syslog.LOG_INFO, componentName)
if err == nil {
logrus.AddHook(&logLevelHook{level, syslogHook})
}
}
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