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Installing and configuring OADP - Backup and restore | Virtualization | OpenShift Container Platform 4.11
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Installing and configuring OADP

As a cluster administrator, you install the OpenShift API for Data Protection (OADP) by installing the OADP Operator. The Operator installs Velero 1.11.

You create a default Secret for your backup storage provider and then you install the Data Protection Application.

Installing the OADP Operator

You install the OpenShift API for Data Protection (OADP) Operator on OpenShift Container Platform 4.11 by using Operator Lifecycle Manager (OLM).

The OADP Operator installs Velero 1.11.

Prerequisites

  • You must be logged in as a user with cluster-admin privileges.

Procedure

  1. In the OpenShift Container Platform web console, click Operators → OperatorHub.

  2. Use the Filter by keyword field to find the OADP Operator.

  3. Select the OADP Operator and click Install.

  4. Click Install to install the Operator in the openshift-adp project.

  5. Click Operators → Installed Operators to verify the installation.

About backup and snapshot locations and their secrets

You specify backup and snapshot locations and their secrets in the DataProtectionApplication custom resource (CR).

Backup locations

You specify S3-compatible object storage, such as Multicloud Object Gateway or MinIO, as a backup location.

Velero backs up OpenShift Container Platform resources, Kubernetes objects, and internal images as an archive file on object storage.

Snapshot locations

If you use your cloud provider’s native snapshot API to back up persistent volumes, you must specify the cloud provider as the snapshot location.

If you use Container Storage Interface (CSI) snapshots, you do not need to specify a snapshot location because you will create a VolumeSnapshotClass CR to register the CSI driver.

If you use Restic, you do not need to specify a snapshot location because Restic backs up the file system on object storage.

secrets

If the backup and snapshot locations use the same credentials or if you do not require a snapshot location, you create a default Secret.

If the backup and snapshot locations use different credentials, you create two secret objects:

  • Custom Secret for the backup location, which you specify in the DataProtectionApplication CR.

  • Default Secret for the snapshot location, which is not referenced in the DataProtectionApplication CR.

The Data Protection Application requires a default Secret. Otherwise, the installation will fail.

If you do not want to specify backup or snapshot locations during the installation, you can create a default Secret with an empty credentials-velero file.

Creating a default Secret

You create a default Secret if your backup and snapshot locations use the same credentials or if you do not require a snapshot location.

The DataProtectionApplication custom resource (CR) requires a default Secret. Otherwise, the installation will fail. If the name of the backup location Secret is not specified, the default name is used.

If you do not want to use the backup location credentials during the installation, you can create a Secret with the default name by using an empty credentials-velero file.
Prerequisites

  • Your object storage and cloud storage, if any, must use the same credentials.

  • You must configure object storage for Velero.

  • You must create a credentials-velero file for the object storage in the appropriate format.

Procedure

  • Create a Secret with the default name:

    $ oc create secret generic cloud-credentials -n openshift-adp --from-file cloud=credentials-velero

The Secret is referenced in the spec.backupLocations.credential block of the DataProtectionApplication CR when you install the Data Protection Application.

Configuring the Data Protection Application

You can configure the Data Protection Application by setting Velero resource allocations or enabling self-signed CA certificates.

Setting Velero CPU and memory resource allocations

You set the CPU and memory resource allocations for the Velero pod by editing the DataProtectionApplication custom resource (CR) manifest.

Prerequisites

  • You must have the OpenShift API for Data Protection (OADP) Operator installed.

Procedure

  • Edit the values in the spec.configuration.velero.podConfig.ResourceAllocations block of the DataProtectionApplication CR manifest, as in the following example:

    apiVersion: oadp.openshift.io/v1alpha1
kind: DataProtectionApplication
metadata:
  name: <dpa_sample>
spec:
...
  configuration:
    velero:
      podConfig:
        nodeSelector: <node selector> (1)
        resourceAllocations: (2)
          limits:
            cpu: "1"
            memory: 1024Mi
          requests:
            cpu: 200m
            memory: 256Mi
    1 Specify the node selector to be supplied to Velero podSpec.
    2 The resourceAllocations listed are for average usage.

Enabling self-signed CA certificates

You must enable a self-signed CA certificate for object storage by editing the DataProtectionApplication custom resource (CR) manifest to prevent a certificate signed by unknown authority error.

Prerequisites

  • You must have the OpenShift API for Data Protection (OADP) Operator installed.

Procedure

  • Edit the spec.backupLocations.velero.objectStorage.caCert parameter and spec.backupLocations.velero.config parameters of the DataProtectionApplication CR manifest:

    apiVersion: oadp.openshift.io/v1alpha1
kind: DataProtectionApplication
metadata:
  name: <dpa_sample>
spec:
...
  backupLocations:
    - name: default
      velero:
        provider: aws
        default: true
        objectStorage:
          bucket: <bucket>
          prefix: <prefix>
          caCert: <base64_encoded_cert_string> (1)
        config:
          insecureSkipTLSVerify: "false" (2)
...
    1 Specify the Base46-encoded CA certificate string.
    2 The insecureSkipTLSVerify configuration can be set to either "true" or "false". If set to "true", SSL/TLS security is disabled. If set to "false", SSL/TLS security is enabled.

Installing the Data Protection Application

You install the Data Protection Application (DPA) by creating an instance of the DataProtectionApplication API.

Prerequisites

  • You must install the OADP Operator.

  • You must configure object storage as a backup location.

  • If you use snapshots to back up PVs, your cloud provider must support either a native snapshot API or Container Storage Interface (CSI) snapshots.

  • If the backup and snapshot locations use the same credentials, you must create a Secret with the default name, cloud-credentials.

  • If the backup and snapshot locations use different credentials, you must create two secrets:

    • Secret with a custom name for the backup location. You add this Secret to the DataProtectionApplication CR.

    • Secret with the default name, cloud-credentials, for the snapshot location. This Secret is not referenced in the DataProtectionApplication CR.

      If you do not want to specify backup or snapshot locations during the installation, you can create a default Secret with an empty credentials-velero file. If there is no default Secret, the installation will fail.

      Velero creates a secret named velero-repo-credentials in the OADP namespace, which contains a default backup repository password. You can update the secret with your own password encoded as base64 before you run your first backup targeted to the backup repository. The value of the key to update is Data[repository-password].

      After you create your DPA, the first time that you run a backup targeted to the backup repository, Velero creates a backup repository whose secret is velero-repo-credentials, which contains either the default password or the one you replaced it with. If you update the secret password after the first backup, the new password will not match the password in velero-repo-credentials, and therefore, Velero will not be able to connect with the older backups.
Procedure

  1. Click Operators → Installed Operators and select the OADP Operator.

  2. Under Provided APIs, click Create instance in the DataProtectionApplication box.

  3. Click YAML View and update the parameters of the DataProtectionApplication manifest:

    apiVersion: oadp.openshift.io/v1alpha1
kind: DataProtectionApplication
metadata:
  name: <dpa_sample>
  namespace: openshift-adp
spec:
  configuration:
    velero:
      defaultPlugins:
        - kubevirt (1)
        - gcp (2)
        - csi (3)
        - openshift (4)
      resourceTimeout: 10m (5)
    restic:
      enable: true (6)
      podConfig:
        nodeSelector: <node_selector> (7)
  backupLocations:
    - velero:
        provider: gcp (8)
        default: true
        credential:
          key: cloud
          name: <default_secret> (9)
        objectStorage:
          bucket: <bucket_name> (10)
          prefix: <prefix> (11)
    1 The kubevirt plugin is mandatory for OpenShift Virtualization.
    2 Specify the plugin for the backup provider, for example, gcp, if it exists.
    3 The csi plugin is mandatory for backing up PVs with CSI snapshots. The csi plugin uses the Velero CSI beta snapshot APIs. You do not need to configure a snapshot location.
    4 The openshift plugin is mandatory.
    5 Specify how many minutes to wait for several Velero resources before timeout occurs, such as Velero CRD availability, volumeSnapshot deletion, and backup repository availability. The default is 10m.
    6 Set this value to false if you want to disable the Restic installation. Restic deploys a daemon set, which means that Restic pods run on each working node. In OADP version 1.2 and later, you can configure Restic for backups by adding spec.defaultVolumesToFsBackup: true to the Backup CR. In OADP version 1.1, add spec.defaultVolumesToRestic: true to the Backup CR.
    7 Specify on which nodes Restic is available. By default, Restic runs on all nodes.
    8 Specify the backup provider.
    9 Specify the correct default name for the Secret, for example, cloud-credentials-gcp, if you use a default plugin for the backup provider. If specifying a custom name, then the custom name is used for the backup location. If you do not specify a Secret name, the default name is used.
    10 Specify a bucket as the backup storage location. If the bucket is not a dedicated bucket for Velero backups, you must specify a prefix.
    11 Specify a prefix for Velero backups, for example, velero, if the bucket is used for multiple purposes.

  4. Click Create.

  5. Verify the installation by viewing the OADP resources:

    $ oc get all -n openshift-adp
    Example output
    NAME                                                     READY   STATUS    RESTARTS   AGE
pod/oadp-operator-controller-manager-67d9494d47-6l8z8    2/2     Running   0          2m8s
pod/restic-9cq4q                                         1/1     Running   0          94s
pod/restic-m4lts                                         1/1     Running   0          94s
pod/restic-pv4kr                                         1/1     Running   0          95s
pod/velero-588db7f655-n842v                              1/1     Running   0          95s

NAME                                                       TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)    AGE
service/oadp-operator-controller-manager-metrics-service   ClusterIP   172.30.70.140    <none>        8443/TCP   2m8s

NAME                    DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE   NODE SELECTOR   AGE
daemonset.apps/restic   3         3         3       3            3           <none>          96s

NAME                                                READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/oadp-operator-controller-manager    1/1     1            1           2m9s
deployment.apps/velero                              1/1     1            1           96s

NAME                                                           DESIRED   CURRENT   READY   AGE
replicaset.apps/oadp-operator-controller-manager-67d9494d47    1         1         1       2m9s
replicaset.apps/velero-588db7f655                              1         1         1       96s

Enabling CSI in the DataProtectionApplication CR

You enable the Container Storage Interface (CSI) in the DataProtectionApplication custom resource (CR) in order to back up persistent volumes with CSI snapshots.

Prerequisites

  • The cloud provider must support CSI snapshots.

Procedure

  • Edit the DataProtectionApplication CR, as in the following example:

    apiVersion: oadp.openshift.io/v1alpha1
kind: DataProtectionApplication
...
spec:
  configuration:
    velero:
      defaultPlugins:
      - openshift
      - csi (1)
    1 Add the csi default plugin.

Uninstalling OADP

You uninstall the OpenShift API for Data Protection (OADP) by deleting the OADP Operator. See Deleting Operators from a cluster for details.