mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-29 17:50:23 +00:00
101 lines
4.1 KiB
Markdown
101 lines
4.1 KiB
Markdown
# CSI RBD Plugin
|
|
|
|
The RBD CSI plugin is able to provision new RBD images and attach and mount those to worlkoads.
|
|
|
|
## Building
|
|
|
|
CSI RBD plugin can be compiled in a form of a binary file or in a form of a Docker image. When compiled as a binary file, the result is stored in `_output/` directory with the name `rbdplugin`. When compiled as an image, it's stored in the local Docker image store.
|
|
|
|
Building binary:
|
|
```bash
|
|
$ make rbdplugin
|
|
```
|
|
|
|
Building Docker image:
|
|
```bash
|
|
$ make image-rbdplugin
|
|
```
|
|
|
|
## Configuration
|
|
|
|
**Available command line arguments:**
|
|
|
|
Option | Default value | Description
|
|
------ | ------------- | -----------
|
|
`--endpoint` | `unix://tmp/csi.sock` | CSI endpoint, must be a UNIX socket
|
|
`--drivername` | `csi-cephfsplugin` | name of the driver (Kubernetes: `provisioner` field in StorageClass must correspond to this value)
|
|
`--nodeid` | _empty_ | This node's ID
|
|
|
|
**Available volume parameters:**
|
|
|
|
Parameter | Required | Description
|
|
--------- | -------- | -----------
|
|
`monitors` | yes | Comma separated list of Ceph monitors (e.g. `192.168.100.1:6789,192.168.100.2:6789,192.168.100.3:6789`)
|
|
`pool` | yes | Ceph pool into which the RBD image shall be created
|
|
`imageFormat` | no | RBD image format. Defaults to `2`. See [man pages](http://docs.ceph.com/docs/mimic/man/8/rbd/#cmdoption-rbd-image-format)
|
|
`imageFeatures` | no | RBD image features. Available for `imageFormat=2`. CSI RBD currently supports only `layering` feature. See [man pages](http://docs.ceph.com/docs/mimic/man/8/rbd/#cmdoption-rbd-image-feature)
|
|
`csiProvisionerSecretName`, `csiNodePublishSecretName` | for Kubernetes | name of the Kubernetes Secret object containing Ceph client credentials. Both parameters should have the same value
|
|
`csiProvisionerSecretNamespace`, `csiNodePublishSecretNamespace` | for Kubernetes | namespaces of the above Secret objects
|
|
|
|
**Required secrets:**
|
|
Admin credentials are required for provisioning new RBD images
|
|
`ADMIN_NAME`: `ADMIN_PASSWORD` - note that the key of the key-value pair is the name of the client with admin privileges, and the value is its password
|
|
|
|
Also note that CSI RBD expects admin keyring and Ceph config file in `/etc/ceph`.
|
|
|
|
## Deployment with Kubernetes
|
|
|
|
Requires Kubernetes 1.11
|
|
|
|
Your Kubernetes cluster must allow privileged pods (i.e. `--allow-privileged` flag must be set to true for both the API server and the kubelet). Moreover, as stated in the [mount propagation docs](https://kubernetes.io/docs/concepts/storage/volumes/#mount-propagation), the Docker daemon of the cluster nodes must allow shared mounts.
|
|
|
|
YAML manifests are located in `deploy/rbd/kubernetes`.
|
|
|
|
**Deploy RBACs for sidecar containers and node plugins:**
|
|
|
|
```bash
|
|
$ kubectl create -f csi-attacher-rbac.yaml
|
|
$ kubectl create -f csi-provisioner-rbac.yaml
|
|
$ kubectl create -f csi-nodeplugin-rbac.yaml
|
|
```
|
|
|
|
Those manifests deploy service accounts, cluster roles and cluster role bindings. These are shared for both RBD and CephFS CSI plugins, as they require the same permissions.
|
|
|
|
**Deploy CSI sidecar containers:**
|
|
|
|
```bash
|
|
$ kubectl create -f csi-rbdplugin-attacher.yaml
|
|
$ kubectl create -f csi-rbdplugin-provisioner.yaml
|
|
```
|
|
|
|
Deploys stateful sets for external-attacher and external-provisioner sidecar containers for CSI RBD.
|
|
|
|
**Deploy RBD CSI driver:**
|
|
|
|
```bash
|
|
$ kubectl create -f csi-rbdplugin.yaml
|
|
```
|
|
|
|
Deploys a daemon set with two containers: CSI driver-registrar and the CSI RBD driver.
|
|
|
|
## Verifying the deployment in Kubernetes
|
|
|
|
After successfuly completing the steps above, you should see output similar to this:
|
|
|
|
```bash
|
|
$ kubectl get all
|
|
NAME READY STATUS RESTARTS AGE
|
|
pod/csi-rbdplugin-attacher-0 1/1 Running 0 23s
|
|
pod/csi-rbdplugin-fptqr 2/2 Running 0 21s
|
|
pod/csi-rbdplugin-provisioner-0 1/1 Running 0 22s
|
|
|
|
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
|
|
service/csi-rbdplugin-attacher ClusterIP 10.109.15.54 <none> 12345/TCP 26s
|
|
service/csi-rbdplugin-provisioner ClusterIP 10.104.2.130 <none> 12345/TCP 23s
|
|
|
|
...
|
|
```
|
|
|
|
You can try deploying a demo pod from `examples/rbd` to test the deployment further.
|
|
|