OpenShift Data Foundation (ODF)

Red Hat OpenShift Data Foundation とは

Red Hat® OpenShift® Data Foundation (旧 Red Hat OpenShift Container Storage) は、コンテナ用ソフトウェア・デファインド・ストレージであり、Red Hat OpenShift に緊密に統合されたデータサービスを提供します。Red Hat OpenShift Data Foundation は、クラウド全体でアプリケーションを迅速かつ効率的に開発し、デプロイするのに役立ちます。

ここでは、以下のドキュメントに基づいて、AWS 上の OpenShift Container Platform (OCP) IPI/UPI 環境に ODF 4.16 を導入・設定する手順をご紹介します。

Installing Red Hat OpenShift Data Foundation Operator

Infrastructure Node

以下を参考にして Infrastructure Node を設定します。

今回は instance-type が r5.8xlarge の Worker Node 6台を Infrastructure Node に設定してみます。

$ oc get node -o name -l node-role\.kubernetes\.io/worker -l node.kubernetes.io/instance-type="r5.8xlarge"
node/ip-33-555-14-118.us-westside-99.machine.external
node/ip-33-555-14-19.us-westside-99.machine.external
node/ip-33-555-14-72.us-westside-99.machine.external
node/ip-33-555-14-78.us-westside-99.machine.external
node/ip-33-555-14-94.us-westside-99.machine.external
node/ip-33-555-14-99.us-westside-99.machine.external

$ for N in $(oc get node -o name -l node-role\.kubernetes\.io/worker -l node.kubernetes.io/instance-type="r5.8xlarge")
do
  oc label $N node-role.kubernetes.io/infra=""
  oc label $N cluster.ocs.openshift.io/openshift-storage=""
  oc adm taint $N node.ocs.openshift.io/storage="true":NoSchedule
done
node/ip-33-555-14-19.us-westside-99.machine.external labeled
node/ip-33-555-14-19.us-westside-99.machine.external labeled
node/ip-33-555-14-19.us-westside-99.machine.external tainted
node/ip-33-555-14-72.us-westside-99.machine.external labeled
node/ip-33-555-14-72.us-westside-99.machine.external labeled
node/ip-33-555-14-72.us-westside-99.machine.external tainted
node/ip-33-555-14-78.us-westside-99.machine.external labeled
node/ip-33-555-14-78.us-westside-99.machine.external labeled
node/ip-33-555-14-78.us-westside-99.machine.external tainted
node/ip-33-555-14-94.us-westside-99.machine.external labeled
node/ip-33-555-14-94.us-westside-99.machine.external labeled
node/ip-33-555-14-94.us-westside-99.machine.external tainted
node/ip-33-555-14-99.us-westside-99.machine.external labeled
node/ip-33-555-14-99.us-westside-99.machine.external labeled
node/ip-33-555-14-99.us-westside-99.machine.external tainted
node/ip-33-555-14-118.us-westside-99.machine.external labeled
node/ip-33-555-14-118.us-westside-99.machine.external labeled
node/ip-33-555-14-118.us-westside-99.machine.external tainted

Install ODF Operator

Operator Hub から ODF Operator を導入します。

導入が完了すると、以下のようになります。

Creating an OpenShift Data Foundation cluster

Installed Operator から OpenShift Data Foundation を選択し、Create StorageSystem Tab から StorageSystem を作成します。

最初の画面で選択可能な Storage Class は以下の2つで、Backing Storage として Amazon Elastic Block Store (EBS) を使用します。今回は gp3-csi を使用します。

$ oc get sc
NAME                          PROVISIONER                             RECLAIMPOLICY   VOLUMEBINDINGMODE      ALLOWVOLUMEEXPANSION   AGE
gp2-csi                       ebs.csi.aws.com                         Delete          WaitForFirstConsumer   true                   7d
gp3-csi (default)             ebs.csi.aws.com                         Delete          WaitForFirstConsumer   true                   7d

$ oc -o yaml get sc gp3-csi
allowVolumeExpansion: true
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  annotations:
    storageclass.kubernetes.io/is-default-class: "true"
  name: gp3-csi
parameters:
  encrypted: "true"
  type: gp3
provisioner: ebs.csi.aws.com
reclaimPolicy: Delete
volumeBindingMode: WaitForFirstConsumer

Requested capacity で実効容量を選択します。今回は 4 TiB を選択します。
Select nodes では、先程 Label を設定した Node が選択された状態で表示されます。

暗号化の設定を行います。

最終画面で設定一覧が表示され Create StorageSystem ボタンで実行されます。

Verifying OpenShift Data Foundation deployment

Resources

ODF のリソースは openshift-storage Project に作成されるため、oc get all 等でリソースの状況を確認します。

PV

以下の PV が作成されます。CAPACITY=4Ti がデータ用 PV で、Backing Storage は EBS になります。暗号化を指定したため、AWS Console からも該当 EBS Volume の暗号化設定が確認できます。.spec.csi.volumeHandle が EBS の Volume ID に該当します。
StorageSystem を削除すると、これらの PV も自動的に削除されます。

$ oc get pv
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                                                   STORAGECLASS                  VOLUMEATTRIBUTESCLASS   REASON   AGE
pvc-0a4a38c0-f790-44b5-8113-ff2d7aa4d86a   50Gi       RWO            Delete           Bound    openshift-storage/db-noobaa-db-pg-0                     ocs-storagecluster-ceph-rbd   <unset>                          47h
pvc-26c5a955-bceb-4467-af2b-4359b3858ab9   4Ti        RWO            Delete           Bound    openshift-storage/ocs-deviceset-gp3-csi-2-data-0bxxc9   gp3-csi                       <unset>                          47h
pvc-6a628a05-004a-491f-a345-369140d3a3b1   50Gi       RWO            Delete           Bound    openshift-storage/rook-ceph-mon-b                       gp3-csi                       <unset>                          47h
pvc-8a83005b-61b0-4acd-baa0-909374c1b349   50Gi       RWO            Delete           Bound    openshift-storage/rook-ceph-mon-a                       gp3-csi                       <unset>                          47h
pvc-9b95f79c-10e0-4a02-8f1c-ae804015a8ae   4Ti        RWO            Delete           Bound    openshift-storage/ocs-deviceset-gp3-csi-0-data-086rvd   gp3-csi                       <unset>                          47h
pvc-e5226452-dc5d-4b2c-af70-9633e0958f41   4Ti        RWO            Delete           Bound    openshift-storage/ocs-deviceset-gp3-csi-1-data-0fn6zd   gp3-csi                       <unset>                          47h
pvc-f4b99572-f16c-4260-87d7-91dc9e38ed9b   50Gi       RWO            Delete           Bound    openshift-storage/rook-ceph-mon-c                       gp3-csi                       <unset>                          47h

$ oc -o yaml get pv pvc-26c5a955-bceb-4467-af2b-4359b3858ab9
apiVersion: v1
kind: PersistentVolume
metadata:
  annotations:
    pv.kubernetes.io/provisioned-by: ebs.csi.aws.com
    volume.kubernetes.io/provisioner-deletion-secret-name: ""
    volume.kubernetes.io/provisioner-deletion-secret-namespace: ""
  finalizers:
  - kubernetes.io/pv-protection
  - external-attacher/ebs-csi-aws-com
  name: pvc-26c5a955-bceb-1234-af2b-abe910d
spec:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 4Ti
  claimRef:
    apiVersion: v1
    kind: PersistentVolumeClaim
    name: ocs-deviceset-gp3-csi-2-data-axyb
    namespace: openshift-storage
  csi:
    driver: ebs.csi.aws.com
    volumeAttributes:
      storage.kubernetes.io/csiProvisionerIdentity: xxxx-yyyy-ebs.csi.aws.com
    volumeHandle: vol-abcd0123syz
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: topology.ebs.csi.aws.com/zone
          operator: In
          values:
          - ap-northeast-3b
  persistentVolumeReclaimPolicy: Delete
  storageClassName: gp3-csi
  volumeMode: Block

StorageClass

以下の StorageClass が追加されます。

$ oc get sc
NAME                          PROVISIONER                             RECLAIMPOLICY   VOLUMEBINDINGMODE      ALLOWVOLUMEEXPANSION   AGE
ocs-storagecluster-ceph-rbd   openshift-storage.rbd.csi.ceph.com      Delete          Immediate              true                   4d18h
ocs-storagecluster-cephfs     openshift-storage.cephfs.csi.ceph.com   Delete          Immediate              true                   4d18h
openshift-storage.noobaa.io   openshift-storage.noobaa.io/obc         Delete          Immediate              false                  4d18h


$ oc -o yaml get sc ocs-storagecluster-ceph-rbd ocs-storagecluster-cephfs openshift-storage.noobaa.io
apiVersion: v1
items:
- allowVolumeExpansion: true
  apiVersion: storage.k8s.io/v1
  kind: StorageClass
  metadata:
    annotations:
      description: Provides RWO Filesystem volumes, and RWO and RWX Block volumes
    name: ocs-storagecluster-ceph-rbd
  parameters:
    clusterID: openshift-storage
    csi.storage.k8s.io/controller-expand-secret-name: rook-csi-rbd-provisioner
    csi.storage.k8s.io/controller-expand-secret-namespace: openshift-storage
    csi.storage.k8s.io/fstype: ext4
    csi.storage.k8s.io/node-stage-secret-name: rook-csi-rbd-node
    csi.storage.k8s.io/node-stage-secret-namespace: openshift-storage
    csi.storage.k8s.io/provisioner-secret-name: rook-csi-rbd-provisioner
    csi.storage.k8s.io/provisioner-secret-namespace: openshift-storage
    imageFeatures: layering,deep-flatten,exclusive-lock,object-map,fast-diff
    imageFormat: "2"
    pool: ocs-storagecluster-cephblockpool
  provisioner: openshift-storage.rbd.csi.ceph.com
  reclaimPolicy: Delete
  volumeBindingMode: Immediate
  
- allowVolumeExpansion: true
  apiVersion: storage.k8s.io/v1
  kind: StorageClass
  metadata:
    annotations:
      description: Provides RWO and RWX Filesystem volumes
    name: ocs-storagecluster-cephfs
  parameters:
    clusterID: openshift-storage
    csi.storage.k8s.io/controller-expand-secret-name: rook-csi-cephfs-provisioner
    csi.storage.k8s.io/controller-expand-secret-namespace: openshift-storage
    csi.storage.k8s.io/node-stage-secret-name: rook-csi-cephfs-node
    csi.storage.k8s.io/node-stage-secret-namespace: openshift-storage
    csi.storage.k8s.io/provisioner-secret-name: rook-csi-cephfs-provisioner
    csi.storage.k8s.io/provisioner-secret-namespace: openshift-storage
    fsName: ocs-storagecluster-cephfilesystem
  provisioner: openshift-storage.cephfs.csi.ceph.com
  reclaimPolicy: Delete
  volumeBindingMode: Immediate
  
- apiVersion: storage.k8s.io/v1
  kind: StorageClass
  metadata:
    annotations:
      description: Provides Object Bucket Claims (OBCs)
    name: openshift-storage.noobaa.io
  parameters:
    bucketclass: noobaa-default-bucket-class
  provisioner: openshift-storage.noobaa.io/obc
  reclaimPolicy: Delete
  volumeBindingMode: Immediate

Console

OCP Console の Storage 配下に Data Foundation が追加され、ODF の状況を確認することが出来ます。