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awssyncer: an inotify-based automatic syncer for Amazon AWS S3
This repository provides a utility called awssyncer. awssyncer uses Linux inotify to track changes to a directory structure, syncing any modifcations into an Amazon AWS S3 bucket. It also does a full synchronisation periodically to ensure no changes are missed.
The awssyncer utility makes use of the AWS command line interface
aws, invoking it either to add or remove files and
directories. awssyncer is written in C++, making use of some C++14 and
C++17 language features.
This utility obtains its configuration through environment variables:
LOCAL_PATH: The local directory that should be synchronised. This path needs to be absolute and must end with a trailing slash. When running this utility using Docker, it is always set to
S3_BUCKET: The name of the AWS S3 bucket to which data should be synchronised.
FILTER_REGEX: Regular expression of files/directories whose activity should not be monitored. This does not mean that these files will not end up in S3. It only applies to monitoring; not synchronisation.
SYNC_EXCLUDES: List of globs that should be passed to the
aws s3 sync --exclude. Globs are separated by a
|character. For example,
aws s3 syncto be invoked with
--exclude '*.jpg' --exclude '*.mp3'.
Credentials for accessing AWS can be configured by exporting the
canonical AWS environment variables (e.g.,
This repository also provices a simple Docker file that creates a simple installation based on Alpine Linux. After building the awssyncer, it also invokes the awssyncer unit tests.