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‎README.md

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# powervs-csi-driver
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CSI Driver for IBM® Power Systems™ Virtual Server
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# IBM PowerVS Block CSI Driver
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CSI Driver for IBM® Power Systems™ Virtual Servers
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# Overview
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The IBM Power Virtual Systems Container Storage Interface (CSI) Driver provides a CSI interface used by Container Orchestrators to manage the lifecycle of Power Virtual System volumes.
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# CSI Specification Compatibility Matrix
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| PowerVS CSI Driver \ CSI Version | v1.5.0 |
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| ----------------------------- | -------|
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| main branch | yes |
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# Features
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The following CSI gRPC calls are implemented:
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- **Controller Service:** CreateVolume, DeleteVolume, ControllerPublishVolume,ControllerUnpublishVolume, ControllerGetCapabilities, ValidateVolumeCapabilities
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- **Node Service:** NodeStageVolume, NodeUnstageVolume, NodePublishVolume, NodeUnpublishVolume, NodeGetCapabilities, NodeGetInfo
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- **Identity Service:** GetPluginInfo, GetPluginCapabilities
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# CreateVolume Parameters
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There are several optional parameters that could be passed into ``` CreateVolumeRequest.parameters``` map, these parameters can be configured in StorageClass, see example:
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| **Parameters** | **Values** | **Default** | **Description**|
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| ----------------------------- | ----------------------------- | ----------- | ----------------------------- |
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| "csi.storage.k8s.io/fstype" | xfs, ext2, ext3, ext4 | ext4 | File system type that will be formatted during volume creation. This parameter is case sensitive! |
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## Driver Options
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There are couple driver options that can be passed as arguments when starting driver container.
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| Option argument | value sample | default | Description |
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|-----------------------------|---------------------------------------------------|-----------------------------------------------------|---------------------|
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| endpoint | tcp://127.0.0.1:10000/ | unix:///var/lib/csi/sockets/pluginproxy/csi.sock | added to all volumes, for checking if a given volume was already created so that ControllerPublish/CreateVolume is idempotent. |
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| volume-attach-limit | 1,2,3 ... | -1 | Value for the maximum number of volumes attachable per node. If specified, the limit applies to all nodes. If not specified, the value is approximated from the instance type. |
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| debug | true | false | if true, driver will enable the debug log level|
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# IBM PowerVS Block CSI Driver on Kubernetes
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Following sections are Kubernetes specific. If you are Kubernetes user, use followings for driver features, installation steps and examples.
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## Kubernetes Version Compatibility Matrix
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| PowerVS CSI Driver \ Kubernetes Version| v1.22 |
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|----------------------------------------|-------|
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| main branch | yes |
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## Features
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* **Static Provisioning** - create a new or migrating existing PowerVS volumes, then create persistence volume (PV) from the PowerVS volume and consume the PV from container using persistence volume claim (PVC).
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* **Dynamic Provisioning** - uses persistence volume claim (PVC) to request the Kuberenetes to create the PowerVS volume on behalf of user and consumes the volume from inside container.
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* **Mount Option** - mount options could be specified in persistence volume (PV) to define how the volume should be mounted.
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* **[Volume Resizing](https://kubernetes-csi.github.io/docs/volume-expansion.html)** - expand the volume size. The corresponding CSI feature (`ExpandCSIVolumes`) is beta since Kubernetes 1.16.
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## Prerequisites
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* If you are managing PowerVS volumes using static provisioning, get yourself familiar with [Power Virtual Servers](https://cloud.ibm.com/docs/power-iaas?topic=power-iaas-getting-started).
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* Get yourself familiar with how to setup Kubernetes on IBM Cloud and have a working Kubernetes cluster:
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* Enable flag `--allow-privileged=true` for `kubelet` and `kube-apiserver`
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* Enable `kube-apiserver` feature gates `--feature-gates=CSINodeInfo=true,CSIDriverRegistry=true,CSIBlockVolume=true`
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* Enable `kubelet` feature gates `--feature-gates=CSINodeInfo=true,CSIDriverRegistry=true,CSIBlockVolume=true`
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## Installation
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#### Set up driver permission
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* Using secret object - Generate IBMCLOUD_APIKEY from the UI, put that user's credentials in [secret manifest](../deploy/kubernetes/secret.yaml), then deploy the secret
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```sh
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curl https://raw.githubusercontent.com/kubernetes-sigs/ibm-powervs-block-csi-driver/blob/main/deploy/kubernetes/secret.yaml > secret.yaml
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# Edit the IBMCLOUD_API_KEY
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# Edit the secret with user credentials
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kubectl apply -f secret.yaml
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```
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#### Deploy driver
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Please see the compatibility matrix above before you deploy the driver
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To deploy the CSI driver:
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```sh
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kubectl apply -k "https://github.com/kubernetes-sigs/ibm-powervs-block-csi-driver/deploy/kubernetes/overlays/stable"
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```
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Verify driver is running:
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```sh
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kubectl get pods -n kube-system
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```
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#### Deploy driver with debug mode
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To view driver debug logs, run the CSI driver with `-v=5` command line option
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To enable powervs debug logs, run the CSI driver with `debug=true` command line option.
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## Examples
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Make sure you follow the [Prerequisites](README.md#Prerequisites) before the examples:
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* [Dynamic Provisioning](../examples/kubernetes/dynamic-provisioning)
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* [Block Volume](../examples/kubernetes/block-volume)
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* [Configure StorageClass](../examples/kubernetes/storageclass)
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* [Volume Resizing](../examples/kubernetes/resizing)
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## Development
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Please go through [CSI Spec](https://github.com/container-storage-interface/spec/blob/master/spec.md) and [General CSI driver development guideline](https://kubernetes-csi.github.io/docs/developing.html) to get some basic understanding of CSI driver before you start.
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### Requirements
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* Golang 1.17.+
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* [Ginkgo](https://github.com/onsi/ginkgo) in your PATH for integration testing and end-to-end testing
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* Docker 20.10+ for releasing
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### Dependency
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Dependencies are managed through go module. To build the project, first turn on go mod using `export GO111MODULE=on`, then build the project using: `make`
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### Testing
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* To create binary, run: `make bin/ibm-powervs-block-csi-driver`
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* To build image, run: `make image`
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* To push image, run: `make push`

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