Python library for throwaway instances of anything that can run in a Docker container
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Testcontainers Python
testcontainers-python facilitates the use of Docker containers for functional and integration testing.
For more information, see the docs.
Getting Started
>>> from testcontainers.postgres import PostgresContainer
>>> import sqlalchemy
>>> with PostgresContainer("postgres:16") as postgres:
... engine = sqlalchemy.create_engine(postgres.get_connection_url())
... with engine.begin() as connection:
... result = connection.execute(sqlalchemy.text("select version()"))
... version, = result.fetchone()
>>> version
'PostgreSQL 16...'
The snippet above will spin up a postgres database in a container. The get_connection_url() convenience method returns a sqlalchemy compatible url we use to connect to the database and retrieve the database version.
Contributing / Development / Release
See CONTRIBUTING.md for more details.
Configuration
You can set environment variables to configure the library behaviour:
| Env Variable | Example | Description |
|---|---|---|
TESTCONTAINERS_DOCKER_SOCKET_OVERRIDE |
/var/run/docker.sock |
Path to Docker's socket used by ryuk |
TESTCONTAINERS_RYUK_PRIVILEGED |
false |
Run ryuk as a privileged container |
TESTCONTAINERS_RYUK_DISABLED |
false |
Disable ryuk |
RYUK_CONTAINER_IMAGE |
testcontainers/ryuk:0.8.1 |
Custom image for ryuk |
RYUK_RECONNECTION_TIMEOUT |
10s |
Reconnection timeout for Ryuk TCP socket before Ryuk reaps all dangling containers |
Alternatively you can set the configuration during runtime:
from testcontainers.core import testcontainers_config
testcontainers_config.ryuk_docker_socket = "/home/user/docker.sock"
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