Afpyro Lyon/Sentry

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![Sentry](sentry.png)

## [Arthur Vuillard](mailto:arthur@hashbang.fr)

Python Meetup Grenoble

26/02/2015

---
# Sentry ?

> Sentry vous donne une idée des erreurs qui affectent vos utilisateurs.

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# Sentry ?

- permet d'assurer un suivi des erreurs
- proactivité
- [pas juste un service en ligne](https://github.com/getsentry/sentry)

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# Sentry : sous le capot

- Base de données relationnelle (MariaDB ou PostgreSQL)
- serveur clef/valeur (Redis, optionnel, recommandé)
- Python 2 seulement :(
- Django
- Celery

---

# Quickstart

```bash
virtualenv2 sentry
source sentry/bin/activate
pip install sentry[postgres]
createdb sentry
```
---

# Quickstart

```bash
sentry init
vim ~/.sentry/sentry.conf.py
sentry upgrade
sentry createsuperuser
sentry start
# goto http://localhost:9000
```
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background-image: url(01_login.png)
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background-image: url(02_new_team.png)
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background-image: url(03_new_project.png)
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background-image: url(04_flux.png)
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background-image: url(05_error.png)
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# Intégration appli Django

```bash
## dans l'environnement de l'appli
pip install raven
```
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# Intégration appli Django

Dans le fichier settings.py :
```python
# Définissez la valeur du DSN : 
RAVEN_CONFIG = {
    'dsn': 'http://a7:c9@localhost/2',
}

# Ajoutez raven à la liste des
# applications installées
INSTALLED_APPS = INSTALLED_APPS + (
    'raven.contrib.django.raven_compat',
)
```
---
# Intégration appli Django

- test de bon fonctionnement
```bash
python manage.py raven test
```
- toutes les erreurs non capturées seront envoyées dans Sentry
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# Intégration appli Python

- possibilité de logger des informations spécifiques avec le module logging
```python
logger.error(
  'There was some crazy error',
  exc_info=True,
  extra={'request': request}
)
```
---
# Intégration appli Python

```ini
[loggers]
keys=root

[handlers]
keys=console,sentry

[formatters]
keys=simple

[logger_root]
level=INFO
handlers=sentry,console
```
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# Intégration appli Python

```ini
[formatter_simple]
format=%(asctime)s - %(name)s - %(levelname)s - %(message)s
datefmt=

[handler_console]
class=logging.StreamHandler
level=INFO
args=(sys.stdout,)

[handler_sentry]
class=raven.handlers.logging.SentryHandler
level=WARNING
args=('http://813:49@localhost/2',)
```
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# Intégration appli Python

```python

import logging
import logging.config
logging.config.fileConfig('logging.conf')

logging.error('test error')
logging.warning('test warning')
logging.info('test info')
```

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# Intégration appli Python

```python
try:
    1 / 0
except ZeroDivisionError:
    logging.exception(
        "A weird error occured"
    )
```
---

# Intégration appli Python

```bash
$ python app.py 
test error
test warning
test info
Sentry is attempting to send 2 pending
error messages
Waiting up to 10 seconds
Press Ctrl-C to quit
$
```
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background-image: url(06_with_errors.png)
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background-image: url(07_error_detail_1.png)
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background-image: url(08_error_detail_2.png)
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background-image: url(09_error_detail_3.png)
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# Conclusion

Pour aller plus loin :
- [http://sentry.readthedocs.org/en/latest/](http://sentry.readthedocs.org/en/latest/)
- [http://raven.readthedocs.org/en/latest/](http://raven.readthedocs.org/en/latest/)
- [https://hashbang.fr/mise_a_jour_sentry.html](https://hashbang.fr/mise_a_jour_sentry.html)

# Des questions ?

## .center[[arthur@hashbang.fr](mailto:arthur@hashbang.fr)]