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Starting README
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Serguei Bezverkhi
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README.md
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README.md
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# Ceph CSI
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## Overview
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RBD CSI plugin implements an interface between CSI enabled Container
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Orchestrator and CEPH cluster. It allows dynamically provision CEPH
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volumes and attach it to workloads.
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Current implementation of CSI RBD plugin was tested in Kubernetes environment,
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but its code does not rely on any Kubernetes specific calls (WIP to make it k8s agnostic)
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and should be able to run with any CSI enabled CO (Containers Orchestration).
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An RBD CSI plugin is available to help simplify storage management.
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Once user creates PVC with the reference to a RBD storage class, rbd image and
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corresponding PV object gets dynamically created and becomes ready to be used by
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workloads.
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[Container Storage Interface (CSI)](https://github.com/container-storage-interface/) driver, provisioner, and attacher for Ceph RBD and CephFS
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# Prerequisite
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## RBD Plugin
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### Configuration Requirements
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## Enable Mount Propagation in Docker
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* Secret object with the authentication key for ceph cluster
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* StorageClass with rbdplugin (default CSI RBD plugin name) as a provisioner name
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and information about ceph cluster (monitors, pool, etc)
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* Service Accounts with required RBAC permissions
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### Feature Status
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### 1.9: Alpha
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**Important:** `CSIPersistentVolume` and `MountPropagation`
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[feature gates must be enabled starting in 1.9](#enabling-the-alpha-feature-gates).
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Also API server must run with running config set to: `storage.k8s.io/v1alpha1`
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### Compiling
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CSI RBD plugin can be compiled in a form of a binary file or in a form of a container. When compiled
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as a binary file, it gets stored in \_output folder with the name rbdplugin. When compiled as a container,
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the resulting image is stored in a local docker's image store.
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To compile just a binary file:
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```
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$ make rbdplugin
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```
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To build a container:
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```
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$ make container
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```
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By running:
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```
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$ docker images | grep rbdplugin
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```
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You should see the following line in the output:
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```
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csi_images/rbdplugin latest 248ddba297fa 30 seconds ago 431 MB
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```
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### Testing
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#### Prerequisite
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##### Enable Mount Propagation in Docker
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Comment out `MountFlags=slave` in docker systemd service then restart docker service.
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```bash
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@ -11,62 +67,98 @@ Comment out `MountFlags=slave` in docker systemd service then restart docker ser
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# systemctl restart docker
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```
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## Enable Kubernetes Feature Gates
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##### Enable Kubernetes Feature Gates
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Enable features `MountPropagation=true,CSIPersistentVolume=true` and runtime config `storage.k8s.io/v1alpha1=true`
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# Build
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#### Step 1: Create Secret
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```
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$ kubectl create -f ./deploy/kubernetes/rbd-secrets.yaml
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```
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**Important:** rbd-secrets.yaml, must be customized to match your ceph environment.
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#### Step 2: Create StorageClass
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```
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$ kubectl create -f ./deploy/kubernetes/rbd-storage-class.yaml
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```
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**Important:** rbd-secrets.yaml, must be customized to match your ceph environment.
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#### Step 3: Start CSI CEPH RBD plugin
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```
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$ kubectl create -f ./deploy/kubernetes/rbdplugin.yaml
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```
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#### Step 4: Start CSI External Attacher
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```
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$ kubectl create -f ./deploy/kubernetes/csi-attacher.yaml
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```
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#### Step 5: Start CSI External Provisioner
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```
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$ kubectl create -f ./deploy/kubernetes/csi-provisioner.yaml
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```
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**Important:** Deployment yaml files includes required Service Account definitions and
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required RBAC rules.
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#### Step 6: Check status of CSI RBD plugin
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```
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$ kubectl get pods | grep csi
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```
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The following output should be displayed:
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```
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NAMESPACE NAME READY STATUS RESTARTS AGE
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default csi-attacher-0 1/1 Running 0 1d
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default csi-nodeplugin-rbdplugin-qxqtl 2/2 Running 0 1d
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default csi-provisioner-0 1/1 Running 0 1d
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```
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#### Step 7: Create PVC
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```
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$ kubectl create -f ./deploy/kubernetes/pvc.yaml
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```
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#### Step 8: Check status of provisioner PV
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```
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$ kubectl get pv
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```
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The following output should be displayed:
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```
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NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
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kubernetes-dynamic-pvc-1b19ddf1-0047-11e8-85ab-760f2eed12ea 5Gi RWO Delete Bound default/csi-pvc rbdv2 10s
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```
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```
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$ kubectl describe pv kubernetes-dynamic-pvc-1b19ddf1-0047-11e8-85ab-760f2eed12ea
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Name: kubernetes-dynamic-pvc-1b19ddf1-0047-11e8-85ab-760f2eed12ea
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Annotations: csi.volume.kubernetes.io/volume-attributes={"monitors":"192.168.80.233:6789","pool":"kubernetes"}
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csiProvisionerIdentity=1516716490787-8081-rbdplugin <------ !!!
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pv.kubernetes.io/provisioned-by=rbdplugin
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StorageClass: rbdv2 <------ !!!
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Status: Bound <------ !!!
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Claim: default/csi-pvc <------ !!!
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Reclaim Policy: Delete
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Access Modes: RWO
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VolumeMode: Filesystem
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Capacity: 5Gi
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Message:
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Source:
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Type: CSI <------ !!!
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```
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#### Step 9: Create a test pod
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```bash
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# make container
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# kubectl create -f ./deploy/pod.yaml
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```
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# Test
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## CepgFS plugin
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## Start rbdplugin and driver registrar
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TODO
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```bash
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# kubectl create -f deploy/kubernetes/rbdplugin.yaml
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```
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## Troubleshooting
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### Start CSI external volume provisioner
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```bash
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# kubectl create -f deploy/kubernetes/csi-provisioner.yaml
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```
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### Start CSI external volume attacher
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```
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# kubectl create -f deploy/kubernetes/csi-attacher.yaml
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```
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### Verify all componets are ready
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```bash
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# kubectl get pod
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NAME READY STATUS RESTARTS AGE
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csi-attacher-0 1/1 Running 0 6s
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csi-nodeplugin-rbdplugin-kwhhc 2/2 Running 0 6m
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csi-provisioner-0 1/1 Running 0 1m
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```
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### Create a CSI storage class
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Replace Ceph mon and secrets in [examples/sc.yaml](examples/sc.yaml)
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```bash
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# kubectl create -f examples/sc.yaml
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```
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### Create a PVC
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```bash
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# kubectl create -f examples/pvc.yaml
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```
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### Create a Pod
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```bash
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# kubectl create -f examples/pod.yaml
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```
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Please submit an issue at:[Issues](https://github.com/ceph/ceph-csi/issues)
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kind: PersistentVolumeClaim
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apiVersion: v1
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kind: PersistentVolumeClaim
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metadata:
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name: rbd-pv
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name: pvc
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spec:
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accessModes:
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- ReadWriteOnce
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storageClassName: rbd-csi-provisioner
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resources:
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requests:
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storage: 1Gi
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storage: 5Gi
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storageClassName: rbd
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19
deploy/kubernetes/rbd-secrets.yaml
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apiVersion: v1
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kind: Secret
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metadata:
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name: ceph-secret-admin
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namespace: kube-system
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type: "kubernetes.io/rbd"
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data:
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#Please note this value is base64 encoded.
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key: QVFDZUhPMVpJTFBQRFJBQTd6dzNkNzZicGxrdlR3em9vc3lidkE9PQo=
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type: kubernetes.io/rbd
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---
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apiVersion: v1
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kind: Secret
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metadata:
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name: ceph-secret-user
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type: "kubernetes.io/rbd"
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data:
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#Please note this value is base64 encoded.
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key: QVFDZDR1MVoxSDI0QnhBQWFxdmZIRnFuMSs0RFZlK1pRZ0ZmUEE9PQo=
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13
deploy/kubernetes/rbd-storage-class.yaml
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apiVersion: storage.k8s.io/v1
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kind: StorageClass
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metadata:
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name: rbd
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provisioner: rbdplugin
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parameters:
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monitors: 192.168.80.233:6789
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pool: kubernetes
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adminID: admin
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adminSecret: AQAmsGBap4EoBhAAET/Hc7fBqAZj/cy7cDcoQA==
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userID: kube
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userSecret: AQAMgXhVwBCeDhAA9nlPaFyfUSatGD4drFWDvQ==
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reclaimPolicy: Delete
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apiVersion: storage.k8s.io/v1beta1
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kind: StorageClass
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metadata:
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name: rbd-csi-provisioner
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provisioner: rbdplugin
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parameters:
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monitors: 172.24.0.6:6789
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pool: rbd
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adminID: admin
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adminSecret: AQAmsGBap4EoBhAAET/Hc7fBqAZj/cy7cDcoQA==
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userID: kube
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userSecret: AQAMgXhVwBCeDhAA9nlPaFyfUSatGD4drFWDvQ==
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