Configuration

Note

By default, if no configuration is provided, Lithops will use the Localhost backend to run the functions.

To work with Lithops on the Cloud, you must configure at least one compute backend and one storage backend. Lithops can work both with the leading cloud providers, and using on-premise or Kubernetes platforms. You have multiple options to choose compute and storage backends based on your needs.

Lithops configuration can be provided either using a configuration file, or in runtime via a python dictionary.

Compute and Storage backends

Choose your compute and storage engines from the table below:

Compute backends	Storage Backends
Localhost IBM Cloud Functions IBM Code Engine AWS Lambda AWS Batch Google Cloud Functions Google Cloud Run Azure Functions Azure Container Apps Aliyun Function Compute Oracle Functions Kubernetes Knative Singularity OpenWhisk Remote Host / Virtual Machine IBM Virtual Private Cloud AWS Elastic Compute Cloud (EC2) Azure Virtual Machines	IBM Cloud Object Storage AWS S3 Google Cloud Storage Azure Blob Storage Aliyun Object Storage Service Infinispan Ceph MinIO Redis OpenStack Swift Oracle Object Storage

Configuration File

To configure Lithops through a configuration file you have multiple options:

1. Create a new file called config in the ~/.lithops folder.

2. Create a new file called .lithops_config in the root directory of your project from where you will execute your Lithops scripts.

3. Create a new file called config in the /etc/lithops/ folder (i.e: /etc/lithops/config). Useful for sharing the config file on multi-user machines.

4. Create the config file in any other location and configure the LITHOPS_CONFIG_FILE system environment variable indicating the absolute or relative location of the configuration file:

LITHOPS_CONFIG_FILE=<CONFIG_FILE_LOCATION>

Configuration keys in runtime

An alternative mode of configuration is to use a Python dictionary. This option allows to pass all the configuration details as part of the Lithops invocation in runtime. You can see an entire list of configuration keys at the Configuration Reference section.

Here is an example of providing configuration keys for IBM Cloud Functions and IBM Cloud Object Storage:

import lithops

config = {
   'lithops': {
      'backend': 'code_engine',
      'storage': 'ibm_cos'
   },
   'ibm': {
      'region': 'REGION',
      'iam_api_key': 'IAM_API_KEY',
      'resource_group_id': 'RESOURCE_GROUP_ID'
   },
   'ibm_cos': {
      'storage_bucket': 'STORAGE_BUCKET'
   }
}

def hello_world(number):
   return f'Hello {number}!'

if __name__ == '__main__':
   fexec = lithops.FunctionExecutor(config=config)
   fexec.map(hello_world, [1, 2, 3, 4])
   print(fexec.get_result())

Configuration Reference

Lithops Config Keys

Group	Key	Default	Mandatory	Additional info
lithops	backend	aws_lambda	no	Compute backend implementation. AWS Lambda is the default.
lithops	storage	aws_s3	no	Storage backend implementation. AWS S3 is the default.
lithops	data_cleaner	True	no	If set to True, then the cleaner will automatically delete all the temporary data that was written into storage_bucket/lithops.jobs.
lithops	monitoring	storage	no	Monitoring system implementation. One of: storage or rabbitmq.
lithops	monitoring_interval	2	no	Monitoring check interval in seconds in case of storage monitoring.
lithops	data_limit	4	no	Max (iter)data size (in MB). Set to False for unlimited size.
lithops	execution_timeout	1800	no	Functions will be automatically killed if they exceed this execution time (in seconds). Alternatively, it can be set in the call_async(), map() or map_reduce() calls using the timeout parameter.
lithops	include_modules	[]	no	Explicitly pickle these dependencies. All required dependencies are pickled if default empty list. No one dependency is pickled if it is explicitly set to None.
lithops	exclude_modules	[]	no	Explicitly keep these modules from pickled dependencies. It is not taken into account if you set include_modules.
lithops	log_level	INFO	no	Logging level. One of: WARNING, INFO, DEBUG, ERROR, CRITICAL, Set to None to disable logging.
lithops	log_format	%(asctime)s [%(levelname)s] %(name)s -- %(message)	no	Logging format string.
lithops	log_stream	ext://sys.stderr	no	Logging stream. eg.: ext://sys.stderr, ext://sys.stdout
lithops	log_filename		no	Path to a file. log_filename has preference over log_stream.