logrus/hooks/sentry/README.md

# Sentry Hook for Logrus <img src="http://i.imgur.com/hTeVwmJ.png" width="40" height="40" alt=":walrus:" class="emoji" title=":walrus:" />

[Sentry](https://getsentry.com) provides both self-hosted and hosted
solutions for exception tracking.
Both client and server are
[open source](https://github.com/getsentry/sentry).

## Usage

Every sentry application defined on the server gets a different
[DSN](https://www.getsentry.com/docs/). In the example below replace
`YOUR_DSN` with the one created for your application.

```go
import (
  "github.com/Sirupsen/logrus"
  "github.com/Sirupsen/logrus/hooks/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:

```go
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:

```go
import (
  "github.com/Sirupsen/logrus"
  "github.com/Sirupsen/logrus/hooks/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,
these are `server_name`, `logger` and `http_request`.
When logs are sent to sentry these fields are treated differently.
- `server_name` (also known as hostname) is the name of the server which
is logging the event (hostname.example.com)
- `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` 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:

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