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Sentry Hook for Logrus :walrus:

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Sentry provides both self-hosted and hosted solutions for exception tracking. Both client and server are open source.

Usage

Every sentry application defined on the server gets a different DSN. In the example below replace YOUR_DSN with the one created for your application.

import (
  "github.com/Sirupsen/logrus"
  "github.com/evalphobia/logrus_sentry"
)

func main() {
  log       := logrus.New()
  hook, err := logrus_sentry.NewSentryHook(YOUR_DSN, []logrus.Level{
    logrus.PanicLevel,
    logrus.FatalLevel,
    logrus.ErrorLevel,
  })

  if err == nil {
    log.Hooks.Add(hook)
  }
}

If you wish to initialize a SentryHook with tags, you can use the NewWithTagsSentryHook constructor to provide default tags:

tags := map[string]string{
  "site": "example.com",
}
levels := []logrus.Level{
  logrus.PanicLevel,
  logrus.FatalLevel,
  logrus.ErrorLevel,
}
hook, err := logrus_sentry.NewWithTagsSentryHook(YOUR_DSN, tags, levels)

If you wish to initialize a SentryHook with an already initialized raven client, you can use the NewWithClientSentryHook constructor:

import (
  "github.com/Sirupsen/logrus"
  "github.com/evalphobia/logrus_sentry"
  "github.com/getsentry/raven-go"
)

func main() {
  log := logrus.New()

  client, err := raven.New(YOUR_DSN)
  if err != nil {
      log.Fatal(err)
  }

  hook, err := logrus_sentry.NewWithClientSentryHook(client, []logrus.Level{
    logrus.PanicLevel,
    logrus.FatalLevel,
    logrus.ErrorLevel,
  })

  if err == nil {
    log.Hooks.Add(hook)
  }
}

hook, err := NewWithClientSentryHook(client, []logrus.Level{
	logrus.ErrorLevel,
})

Special fields

Some logrus fields have a special meaning in this hook, and they will be especially processed by Sentry.

Field key Description
event_id Each logged event is identified by the event_id, which is hexadecimal string representing a UUID4 value. You can manually specify the identifier of a log event by supplying this field. The event_id string should be in one of the following UUID format: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx and urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)
user_name Name of the user who is in the context of the event
user_email Email of the user who is in the context of the event
user_id ID of the user who is in the context of the event
user_ip IP of the user who is in the context of the event
server_name Also known as hostname, it is the name of the server which is logging the event (hostname.example.com)
logger logger is the part of the application which is logging the event. In go this usually means setting it to the name of the package.
http_request http_request is the in-coming request(*http.Request). The detailed request data are sent to Sentry.

Timeout

Timeout is the time the sentry hook will wait for a response from the sentry server.

If this time elapses with no response from the server an error will be returned.

If Timeout is set to 0 the SentryHook will not wait for a reply and will assume a correct delivery.

The SentryHook has a default timeout of 100 milliseconds when created with a call to NewSentryHook. This can be changed by assigning a value to the Timeout field:

hook, _ := logrus_sentry.NewSentryHook(...)
hook.Timeout = 20*time.Second

Enabling Stacktraces

By default the hook will not send any stacktraces. However, this can be enabled with:

hook, _ := logrus_sentry.NewSentryHook(...)
hook.StacktraceConfiguration.Enable = true

Subsequent calls to logger.Error and above will create a stacktrace.

Other configuration options are:

  • StacktraceConfiguration.Level the logrus level at which to start capturing stacktraces.
  • StacktraceConfiguration.Skip how many stack frames to skip before stacktrace starts recording.
  • StacktraceConfiguration.Context the number of lines to include around a stack frame for context.
  • StacktraceConfiguration.InAppPrefixes the prefixes that will be matched against the stack frame to identify it as in_app

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