Tommaso Visconti
70234da9c3
This commit adds instructions to the syslog readme about how to send different log levels to local logging (`log.SetLevel`) and syslog hook. fixes #1369
82 lines
1.9 KiB
Markdown
82 lines
1.9 KiB
Markdown
# Syslog Hooks for Logrus <img src="http://i.imgur.com/hTeVwmJ.png" width="40" height="40" alt=":walrus:" class="emoji" title=":walrus:"/>
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## Usage
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```go
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import (
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"log/syslog"
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"github.com/sirupsen/logrus"
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lSyslog "github.com/sirupsen/logrus/hooks/syslog"
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)
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func main() {
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log := logrus.New()
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hook, err := lSyslog.NewSyslogHook("udp", "localhost:514", syslog.LOG_INFO, "")
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if err == nil {
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log.Hooks.Add(hook)
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}
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}
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```
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If you want to connect to local syslog (Ex. "/dev/log" or "/var/run/syslog" or "/var/run/log"). Just assign empty string to the first two parameters of `NewSyslogHook`. It should look like the following.
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```go
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import (
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"log/syslog"
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"github.com/sirupsen/logrus"
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lSyslog "github.com/sirupsen/logrus/hooks/syslog"
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)
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func main() {
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log := logrus.New()
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hook, err := lSyslog.NewSyslogHook("", "", syslog.LOG_INFO, "")
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if err == nil {
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log.Hooks.Add(hook)
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}
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}
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```
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### Different log levels for local and remote logging
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By default `NewSyslogHook()` sends logs through the hook for all log levels. If you want to have
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different log levels between local logging and syslog logging (i.e. respect the `priority` argument
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passed to `NewSyslogHook()`), you need to implement the `logrus_syslog.SyslogHook` interface
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overriding `Levels()` to return only the log levels you're interested on.
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The following example shows how to log at **DEBUG** level for local logging and **WARN** level for
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syslog logging:
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```go
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package main
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import (
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"log/syslog"
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log "github.com/sirupsen/logrus"
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logrus_syslog "github.com/sirupsen/logrus/hooks/syslog"
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)
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type customHook struct {
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*logrus_syslog.SyslogHook
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}
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func (h *customHook) Levels() []log.Level {
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return []log.Level{log.WarnLevel}
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}
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func main() {
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log.SetLevel(log.DebugLevel)
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hook, err := logrus_syslog.NewSyslogHook("tcp", "localhost:5140", syslog.LOG_WARNING, "myTag")
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if err != nil {
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panic(err)
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}
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log.AddHook(&customHook{hook})
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//...
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}
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```
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