A simple go package intended to assist CSI plugin authors by providing a tool set to manage iscsi connections.
Provide a basic, lightweight library for CSI Plugin Authors to leverage some of the common tasks like connecting and disconnecting iscsi devices to a node. This library includes a high level abstraction for iscsi that exposes simple Connect and Disconnect functions. These are built on top of exported iscsiadm calls, so if you need more control you can access the iscsiadm calls directly.
The idea is to keep this as lightweight and generic as possible. We intentionally avoid the use of any third party libraries or packages in this project. We don't have a vendor directory, because we attempt to rely only on the std golang libs. This may prove to not be ideal, and may be changed over time, but initially it's a worthwhile goal.
By default the library does not provide any logging, but provides an error message that includes any messages from iscsiadm as well as exit-codes. In the event that you need to debug the library, we provide a function:
func EnableDebugLogging(writer io.Writer)
This will turn on verbose logging directed to the provided io.Writer and include the response of every iscsiadm command issued.
Curently the intended usage of this library is simply to provide a golang package to standardize how plugins are implementing iscsi connect and disconnect. It's not intended to be a "service", although that's a possible next step. It's currenty been used for plugins where iscsid is installed in containers only, as well as designs where it uses the nodes iscsid. Each of these approaches has their own pros and cons. Currently, it's up to the plugin author to determine which model suits them best and to deploy their node plugin appropriately.
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