Rclone Lambda Sync

A lambda function to run rclone sync periodically.

Prerequisites

Install a lambda layer with rclone, such as rclone-lambda-layer.

Create a valid rclone config with two remotes source and destination. See https://rclone.org/docs/#configure for details.

rclone config create "source" ...
rclone config create "destination" ...

This creates a local file that looks like this :

$ cat ~/.config/rclone/rclone.conf
[source]
...

[destination]
...

Upload this config in the SSM parameter rclone-config, either using the console or the following one-liner :

aws ssm put-parameter --region eu-west-3 --name rclone-config --type SecureString --value file://$HOME/.config/rclone/rclone.conf --description "Entire rclone.conf for rclone-lambda"

Also set DEPLOYMENT_BUCKET and EVENTS_FILE in a new .env local file.

Deploy

serverless deploy

Test

serverless invoke --function sync

Configuration

Environment Variable	Description	Default
RCLONE_CONFIG_SSM_NAME	Name of the SSM parameter to fetch the config from.	rclone-config
RCLONE_SYNC_CONTENT_DESTINATION	Name of the sync destination in the format "dest:path".	destination:/
RCLONE_SYNC_CONTENT_SOURCE	Name of the sync source in the format "source:path".	source:/
RCLONE_SYNC_DRY_RUN	Do a trial run with no permanent changes.	false
RCLONE_SYNC_EXTRA_FLAGS	List of flags passed to rclone. See available flags in https://rclone.org/flags/.	--exclude /Downloads/** --exclude /External/**

Schedules

By default, rclone-lambda-sync runs once a day around 00:00 UTC. See rclone_lambda_daily.yaml. This behavior can be customized by following these steps :

1. Create a custom yaml file containing the desired schedules

   - schedule:
       name: rclone-lambda-daily-1
       rate: cron(0 1 * * ? *)
       input:
         RCLONE_CONFIG_SSM_NAME: rclone-config-1
   
   - schedule:
       name: rclone-lambda-daily-2
       rate: cron(0 2 * * ? *)
       input:
         RCLONE_CONFIG_SSM_NAME: rclone-config-2

2. Change EVENTS_FILE value to the name of the custom yaml file in the .env local file

3. Test with a slightly different command

   serverless invoke --function sync --data '{"RCLONE_CONFIG_SSM_NAME": "rclone-config-1"}'

Documentation

• https://rclone.org/docs/
• https://itnext.io/a-deep-dive-into-serverless-tracing-with-aws-x-ray-lambda-5ff1821c3c70

License

Unless explicitly stated to the contrary, all contents licensed under the MIT License.