django-postgres-metrics
A Django application that exposes a bunch of PostgreSQL database metrics.
Background
At PyCon Canada 2017 Craig Kerstiens gave a talk "Postgres at any scale". In his talk Craig pointed out a bunch of metrics one should look at to understand why a PostgreSQL database could be "slow" or not perform as expected.
This project adds a Django Admin view exposing these metrics to Django users with the
is_superusers
flag turned on.
Installation
Start by installing django-postgres-metrics
from PyPI:
(env)$ python -m pip install django-postgres-metrics
You will also need to make sure to have psycopg2
or psycopg
installed which
is already a requirement by Django for PostgreSQL support anyway.
Then you need to add postgres_metrics
to your INSTALLED_APPS
list. Due to the way
django-postgres-metrics
works, you need to include it _before* the admin
app:
INSTALLED_APPS = [
'postgres_metrics.apps.PostgresMetrics',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
]
You also need to make sure that the request
context processor is included in the TEMPLATES
setting. It is included by default for projects that were started on Django 1.8 or later:
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'OPTIONS': {
'context_processors': [
...,
'django.template.context_processors.request',
...,
],
},
},
]
Lastly, you need to add a URL path to your global urls.py
before the admin
URL patterns.
from django.urls import include, path
urlpatterns = [
path('admin/postgres-metrics/', include('postgres_metrics.urls')),
path('admin/', admin.site.urls),
]
This is what a metric could look like:
Security
If you found or if you think you found a security issue please get in touch via
info+django-postgres-metrics *at* markusholtermann *dot* eu
.
I'm working about this in my free time. I don't have time to monitor the email 24/7. But you should normally receive a response within a week. If I haven't got back to you within 2 weeks, please reach out again.
Contributing
The project black and isort for formatting its code. flake8 is used for linting. All these are combined into pre-commit to run before each commit and push. To set it up:
(env)$ python -m pip install '.[dev,test]'
(env)$ pre-commit install -t pre-commit -t pre-push --install-hooks
To run the unit tests:
(env)$ django-admin test -v 2 --settings=tests.settings