Updater service for Duplicati

This project contains a service for serving Duplicati update files.

In essence it shadows a remote storage via KVPSButter and provides a local cache for files, serving as a kind-of CDN of private storage.

Environment variables

The service is prepared for Docker usage and is configured via environment variables.

Required variables:

• PRIMARY: The KVPSButter connection string where the source files are fetched from
• CACHEPATH: The path to where cached files will be stored

Optional variables:

• MAX_NOT_FOUND: The maximum number of 404 responses from the remote to store. Can use b/k/m/g/t/p suffix. Default is 10k.

• MAX_SIZE: The maximum size of the disk to use for caching. Can use b/k/m/g/t/p suffix. Default is 10m.

• SEQ_URL: url for logging to Seq.

• SEQ_APIKEY: API key for logging to Seq.

• CACHE_TIME: The duration items are kept cached. Can use s/m/h/d/w suffix. Default is 1d.

• REDIRECT: A url to redirect to, when accessing /.

• APIKEY: API key to enable the /reload endpoint for forced expiration of cached items.

• KEEP_FOREVER_REGEX: Regex to disable expiration on matching items; size limits may still expire items.

• NO_CACHE_REGEX: Regex to disable caching on items matching expression.

• CUSTOM_LOG: A custom serilog message template to write on requests that complete

• CUSTOM_LOG_HEADERS: A semi-colon separated list of request headers to include in log data

• MAXMIND_ACCOUNT_ID: The Maxmind accountid for geolite

• MAXMIND_LICENSE_KEY: The Maxmind licensekey for geolite

• MAXMIND_IP_HEADER: The header with the IP used for geolite lookups

• NOTFOUND_HTML: A path into the primary storage where the 404 page is loaded from

• INDEX_HTML: A path into the primary storage where the index.html page is loaded from

• INDEX_HTML_REGEX: A regex that selects what paths to apply the index html for

Force expire

To force expire items, set APIKEY and use a request similar to:

curl -X POST --data '["key1","item/key2"]' 'https://example.com/reload' --header 'X-API-KEY:<APIKEY>'