Documentation for version v0.10.0 is no longer actively maintained. The version you are currently viewing is a static snapshot. For up-to-date documentation, see the latest version.
Plugins
Heptio Ark has a plugin architecture that allows users to add their own custom functionality to Ark backups & restores without having to modify/recompile the core Ark binary. To add custom functionality, users simply create their own binary containing implementations of Ark’s plugin kinds (described below), plus a small amount of boilerplate code to expose the plugin implementations to Ark. This binary is added to a container image that serves as an init container for the Ark server pod and copies the binary into a shared emptyDir volume for the Ark server to access.
Multiple plugins, of any type, can be implemented in this binary.
A fully-functional sample plugin repository is provided to serve as a convenient starting point for plugin authors.
Plugin Kinds
Ark currently supports the following kinds of plugins:
- Object Store - persists and retrieves backups, backup logs and restore logs
- Block Store - creates volume snapshots (during backup) and restores volumes from snapshots (during restore)
- Backup Item Action - executes arbitrary logic for individual items prior to storing them in a backup file
- Restore Item Action - executes arbitrary logic for individual items prior to restoring them into a cluster
Plugin Logging
Ark provides a logger that can be used by plugins to log structured information to the main Ark server log or per-backup/restore logs. See the sample repository for an example of how to instantiate and use the logger within your plugin.
Getting Started
To help you get started, see the documentation.