rethinkdb-backup

Introduction

This app provides a capability to backup a RethinkDB instance. Data is dumped to a compressed archive. This app can attach to a file synchronization service (e.g. rClone) and initate a request to copy dumps to a remote store.

The system is configured to initiate a backup when changes are made to the RethinkDB factoid database document table:

• A document is added
• A document's status field is updated to public
• A document with status = public is updated (//TODO)

Each backup request can be configured to occur with a given delay (default is 3 hours). When a backup is scheduled, further requests are ignored during this period enabling the system to aggregate or 'batch' changes.

A built-in webserver provides the following HTTP endpoints:

• /: list the database dumps (naming convention <DB_NAME>_dump_<DATETIME>.tar.gz)
• /backup: initiate a backup (requires apiKey as URL param, when configured)
• /<dump name>: download a database dump

Requirements

• NodeJS (>=14.16.0 LTS)

You must also have access to a running instance of RethinkDB and a file synchronization service like rClone.

Getting Started

1. Clone this remote

   git clone https://github.com/PathwayCommons/rethinkdb-backup.git

2. Install packages

   cd rethinkdb-backup
   npm install

3. Run the app

   npm run start

4. Point your browser at http://localhost:3000/

Required software

• Node.js >=10
• RethinkDB ^2.3.0

Configuration

The following environment variables can be used to configure the server:

General:

• NODE_ENV : the environment mode; either production or development (default)
• BASE_URL : used for logging currently
• PORT : the port on which the server runs (default 3000)
• LOG_LEVEL : minimum log level; one of info (default), warn, error
• DUMP_DIRECTORY : name of the directory where database dumps are placed (archives)
• DUMP_PATH : the url path prefix to add
• API_KEY : the API key for protected endpoints (i.e. /backup)

Database:

• DB_NAME : name of the db (default factoid)
• DB_HOST : hostname or ip address of the database host (default localhost)
• DB_PORT : port for the database host (default: 28015)
• DB_USER : the db user
• DB_PASS : the db password
• DB_CERT : the path to the certificate if db uses TLS

Backup:

• DUMP_DATE_FORMAT : format for the date stamp used in naming the zipped archive - i.e. ${DB_NAME}_dump_<date stamp>.tar.gz (default yyyy-MM-dd_HH-mm-ss-SSS)
• BACKUP_DELAY_MIN : the time to wait before triggering a backup (default 180)

Sync Service:

• SYNC_ENABLED : Use the Sync service (default true)
• SYNC_HOST : Sync service host name (default localhost)
• SYNC_PORT : Port that the sync service is bound to (default 5572)
• SYNC_LOGIN : User name for authentication.
• SYNC_PASSWORD : Password for authentication.
• SYNC_CMD : Sync service commmand to execute (for rClone its sync/copy)
• SYNC_SRC : A remote name string e.g. "drive:src" for the source
• SYNC_DST : A remote name string e.g. "drive:dst" for the destination

Docker

Images are maintained on Docker Hub.

Publishing a release

1. Make sure the linting is passing: npm run lint
2. Bump the version number with npm version, in accordance with semver. The version command in npm updates both package.json and git tags, but note that it uses a v prefix on the tags (e.g. v1.2.3).
3. For a bug fix / patch release, run npm version patch.
4. For a new feature release, run npm version minor.
5. For a breaking API change, run npm version major.
6. For a specific version number (e.g. 1.2.3), run npm version 1.2.3.
7. Push the release: git push origin --tags