Object Lambda Function Settings
This page documents environment variables for configuring MinIO AIStor to publish data to an HTTP webhook endpoint and trigger an Object Lambda function. See Transforms with Object Lambda for more complete documentation and tutorials on using these environment variables.
You can specify multiple targets by appending a unique identifier _ID for each set of related settings.
export MINIO_LAMBDA_WEBHOOK_ENABLE_myfunction="on"
export MINIO_LAMBDA_WEBHOOK_ENDPOINT_myfunction="https://webhook-1.example.net"
export MINIO_LAMBDA_WEBHOOK_ENABLE_yourfunction="on"
export MINIO_LAMBDA_WEBHOOK_ENDPOINT_yourfunction="https://webhook-2.example.net"You can specify multiple targets by appending a unique identifier :ID to the configuration key.
mc admin config set ALIAS lambda_webhook:primary enable="on" endpoint="https://webhook.example.net"
mc admin config set ALIAS lambda_webhook:secondary enable="on" endpoint="https://webhook.example.net"Each configuration setting controls fundamental MinIO AIStor behavior and functionality. Test configuration changes in a lower environment, such as DEV or QA, before applying to production.
Enable
Specify "on" to enable the Object Lambda webhook endpoint for a handler function.
Requires specifying MINIO_LAMBDA_WEBHOOK_ENDPOINT.
Endpoint
The HTTP endpoint of the lambda webhook for the handler function.
Auth token
Specify the opaque string or JWT authorization token to use for authenticating to the lambda webhook service.
MinIO AIStor redacts this value when returned as part of mc admin config get.
Client cert
Specify the path to the client certificate to use for performing mTLS authentication to the lambda webhook service.
Client key
Specify the path to the private key to use for performing mTLS authentication to the lambda webhook service.
Response header timeout
Optional
Specify the timeout period for receiving response headers from the lambda webhook server.
Specify a duration value, such as 120s or 2m.
Defaults to 0s (no timeout).
Requires MinIO AIStor RELEASE.2025-08-29T21-27-49Z or later.