https://github.com/metal-stack/csi-driver-lvm

https://github.com/metal-stack/csi-driver-lvm

csi-lvm

Last synced: 1 day ago
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• Host: GitHub
• URL: https://github.com/metal-stack/csi-driver-lvm
• Owner: metal-stack
• License: mit
• Created: 2020-01-31T11:42:51.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2024-09-24T14:42:44.000Z (about 2 months ago)
• Last Synced: 2024-11-05T21:44:47.362Z (8 days ago)
• Topics: csi-lvm
• Language: Go
• Size: 1.4 MB
• Stars: 136
• Watchers: 9
• Forks: 25
• Open Issues: 9
• Metadata Files:
  • Readme: README.md
  • Contributing: CONTRIBUTING.md
  • License: LICENSE
  • Codeowners: CODEOWNERS

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README

        
# csi-driver-lvm #

CSI DRIVER LVM utilizes local storage of Kubernetes nodes to provide persistent storage for pods.

It automatically creates hostPath based persistent volumes on the nodes.

Underneath it creates a LVM logical volume on the local disks. A comma-separated list of grok pattern, which disks to use must be specified.

This CSI driver is derived from [csi-driver-host-path](https://github.com/kubernetes-csi/csi-driver-host-path) and [csi-lvm](https://github.com/metal-stack/csi-lvm)

## Currently it can create, delete, mount, unmount and resize block and filesystem volumes via lvm ##

For the special case of block volumes, the filesystem-expansion has to be performed by the app using the block device

## Installation ##

**Helm charts for installation are located in a separate repository called [helm-charts](https://github.com/metal-stack/helm-charts). If you would like to contribute to the helm chart, please raise an issue or pull request there.**

You have to set the devicePattern for your hardware to specify which disks should be used to create the volume group.

```bash

helm install --repo https://helm.metal-stack.io mytest csi-driver-lvm --set lvm.devicePattern='/dev/nvme[0-9]n[0-9]'

```

Now you can use one of following storageClasses:

* `csi-driver-lvm-linear`

* `csi-driver-lvm-mirror`

* `csi-driver-lvm-striped`

To get the previous old and now deprecated `csi-lvm-sc-linear`, ... storageclasses, set helm-chart value `compat03x=true`.

## Migration ##

If you want to migrate your existing PVC to / from csi-driver-lvm, you can use [korb](https://github.com/BeryJu/korb).

### Todo ###

* implement CreateSnapshot(), ListSnapshots(), DeleteSnapshot()

### Test ###

```bash

kubectl apply -f examples/csi-pvc-raw.yaml

kubectl apply -f examples/csi-pod-raw.yaml

kubectl apply -f examples/csi-pvc.yaml

kubectl apply -f examples/csi-app.yaml

kubectl delete -f examples/csi-pod-raw.yaml

kubectl delete -f examples/csi-pvc-raw.yaml

kubectl delete -f  examples/csi-app.yaml

kubectl delete -f examples/csi-pvc.yaml

```

### Development ###

In order to run the integration tests locally, you need to create to loop devices on your host machine. Make sure the loop device mount paths are not used on your system (default path is `/dev/loop10{0,1}`).

You can create these loop devices like this:

```bash

for i in 100 101; do fallocate -l 1G loop${i}.img ; sudo losetup /dev/loop${i} loop${i}.img; done

sudo losetup -a

# use this for recreation or cleanup

# for i in 100 101; do sudo losetup -d /dev/loop${i}; rm -f loop${i}.img; done

```

You can then run the tests against a kind cluster, running:

```bash

make test

```

To recreate or cleanup the kind cluster:

```bash

make test-cleanup

```