[DOC] changes to backup and restore ONAP component specific data bases

Change-Id: I5e40c8b7a4a310414022224df82998b469fe556a
Issue-ID: DOC-682
Signed-off-by: ramagp <ramakrishnagp@aarnanetworks.com>

3 files changed, 877 insertions, 2 deletions

diff --git a/docs/guides/onap-operator/Backup-And-Restore.png b/docs/guides/onap-operator/Backup-And-Restore.png
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diff --git a/docs/guides/onap-operator/onap_backup_restore.rst b/docs/guides/onap-operator/onap_backup_restore.rst
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@@ -0,0 +1,868 @@
+.. This work is licensed under a Creative Commons Attribution 4.0
+.. International License. http://creativecommons.org/licenses/by/4.0
+.. Copyright © 2017-2020 Aarna Networks, Inc.
+
+.. Links
+.. Github web page to download the latest version of velero open source tool
+.. _Velero official website: https://velero.io
+.. Reference link with more details on Instructions for setting up Velero server
+.. _Setup Velero Server: https://velero.io/docs/v1.5/contributions/minio/#set-up-server
+
+Backup and Restore Solution
+###########################
+
+Problem Statement and Requirement (User Story)
+==============================================
+
+As an ONAP Operator- We require the ability to backup and restore ONAP state data, We want to have Disaster recovery solution for ONAP deployment done over K8.
+
+Basic Use case would be
+
+1) Add/Update/Modify the POD Data or DB Data.
+2) Simulate a Disaster
+3) Restore using Backup.
+4) POD Data/DB entries should be recovered.
+
+Solution Description
+====================
+
+Narrowed down upon a tool which can be used for K8 Backup and Restoration for ONAP deployments named as Velero (formerly Heptio-ARK)
+
+Velero is  an Opensource tool to back up and restore your Kubernetes cluster resources and persistent volumes. Velero lets you:
+
+* Take backups of your cluster and restore in case of loss.
+* Copy cluster resources across cloud providers. NOTE: Cloud volume migrations are not yet supported.
+* Replicate your production environment for development and testing environments.
+
+Velero consists of
+
+* A server that runs on your cluster
+* A command-line client that runs locally
+
+Working Flow diagram
+
+.. figure:: Backup-And-Restore.png
+   :align: center
+
+Installation
+============
+Prerequisites
+-------------
+
+- Access to a Kubernetes cluster, version 1.7 or later.
+- A DNS server on the cluster
+- kubectl installed
+- Labels should be defined there.
+
+Install Velero Tool
+~~~~~~~~~~~~~~~~~~~
+Velero is an open source tool to safely backup and restore, perform disaster recovery, and migrate Kubernetes cluster resources and persistent volumes.
+
+Go to `Velero official website`_ and Click on DOWNLOAD VELERO BUTTON. It will take you to the github page to download the latest version of velero. Scroll down to the
+bottom of the page and choose the binary corresponding to the OS where you want to run the Velero on.
+
+Install and configure Velero Server and Client
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+To configure the latest version (1.5.2) of velero on Linux machine, please follow the below steps.
+
+Run the below command. It will download the velero to your machine
+
+.. code-block:: bash
+
+   wget https://github.com/vmware-tanzu/velero/releases/download/v1.5.2/velero-v1.5.2-linux-amd64.tar.gz
+
+Extract it using below command
+
+.. code-block:: bash
+
+   tar -zxvf velero-v1.5.2-linux-amd64.tar.gz
+
+Once extracted, goto the directory "velero-v1.5.2-linux-amd64"
+
+.. code-block:: bash
+
+   cd velero-v1.5.2-linux-amd64
+
+Inside this you will find a directory called examples and then minio, just go inside it
+
+.. code-block:: bash
+
+   cd examples/minio
+
+Inside this you will find a file called 00-minio-deployment.yaml. Open this file using any editor and look for Velero service yaml portion, there you need to change
+the type from ClusterIP to NodePort
+
+Once made the changes then run the below command to deploy velero server
+
+.. code-block:: bash
+
+   kubectl apply -f 00-minio-deployment.yaml
+
+This will configure the Velero with Minio. Minio is nothing but local storage with aws s3 capabilities. Velero support many cloud providers as well like Azure,AWS,GCP
+etc. You can configure any of those.
+
+Once the Velero deployment is done, then we need to install and configure the velero server component using velero cli.
+
+Create a Velero-specific credentials file (credentials-velero) in your local directory
+
+.. code-block:: bash
+
+   [default]
+   aws_access_key_id=minio
+   aws_secret_access_key=minio123
+
+Start the server and the local storage service. In the Velero directory, run
+
+.. code-block:: bash
+
+    ./velero install \
+    --provider aws \
+    --plugins velero/velero-plugin-for-aws:v1.0.0 \
+    --bucket velero \
+    --secret-file ./credentials-velero \
+    --use-volume-snapshots=false \
+    --backup-location-config region=minio,s3ForcePathStyle="true",s3Url=http://minio.velero.svc:9000
+    --use-restic
+
+Refer this for more details: `Setup Velero Server`_
+
+.. note::
+
+   As Labels need to be defined, because that is a unique identity which we need to have for any backup of our k8 containers,
+
+   So in OOM code, Where -ever we don't have labels, We need to define that whether its configmap or secret, for eg below:-
+
+   labels:
+
+   app: {{ include "common.name" . }}
+   chart: {{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}
+   release: {{ .Release.Name }}
+   heritage: {{ .Release.Service }}
+
+Running Velero Example (Backup and Restoration with Logs)
+---------------------------------------------------------
+
+1) Install SO component
+~~~~~~~~~~~~~~~~~~~~~~~
+
+.. note::
+
+   This is an optional step, if you have already installed SO or all other components of ONAP then you can skip this step.
+
+Below is the example of installing SO component using helm
+
+.. code-block:: bash
+
+  helm install so -n bkup --namespace test3
+
+  NAME:   bkup
+
+  LAST DEPLOYED: Fri Jul 20 06:59:09 2018
+
+  NAMESPACE: test3
+
+  STATUS: DEPLOYED
+
+  RESOURCES:
+
+  ==> v1/Pod(related)
+
+  NAME                         READY  STATUS    RESTARTS  AGE
+
+  bkup-so-db-744fccd888-w67zk  0/1    Init:0/1  0         0s
+
+  bkup-so-7668c746c-vngk8      0/2    Init:0/1  0         0s
+
+  ==> v1/Secret
+
+  NAME        TYPE    DATA  AGE
+
+  bkup-so-db  Opaque  1     0s
+
+  ==> v1/ConfigMap
+
+  NAME                      DATA  AGE
+
+  confd-configmap           1     0s
+
+  so-configmap              5     0s
+
+  so-docker-file-configmap  1     0s
+
+  so-filebeat-configmap     1     0s
+
+  so-log-configmap          11    0s
+
+
+  ==> v1/PersistentVolume
+
+  NAME        CAPACITY  ACCESS MODES  RECLAIM POLICY  STATUS  CLAIM             STORAGECLASS  REASON  AGE
+
+  bkup-so-db  2Gi       RWX           Retain          Bound   test3/bkup-so-db  0s
+
+
+  ==> v1/PersistentVolumeClaim
+
+  NAME        STATUS  VOLUME      CAPACITY  ACCESS MODES  STORAGECLASS  AGE
+
+  bkup-so-db  Bound   bkup-so-db  2Gi       RWX           0s
+
+
+  ==> v1/Service
+
+  NAME   TYPE      CLUSTER-IP   EXTERNAL-IP  PORT(S)                                                                     AGE
+
+  so-db  NodePort  10.43.63.96  <none>       3306:30252/TCP                                                              0s
+
+  so     NodePort  10.43.59.93  <none>       8080:30223/TCP,3904:30225/TCP,3905:30224/TCP,9990:30222/TCP,8787:30250/TCP  0s
+
+
+  ==> v1beta1/Deployment
+
+  NAME        DESIRED  CURRENT  UP-TO-DATE  AVAILABLE  AGE
+
+  bkup-so-db  1        1        1           0          0s
+
+  bkup-so     1        1        1           0          0s
+
+
+.. note::
+
+  Get the application URL by running these commands
+
+  .. code-block:: bash
+
+    export NODE_PORT=$(kubectl get --namespace test3 -o jsonpath="{.spec.ports[0].nodePort}" services so)
+
+    export NODE_IP=$(kubectl get nodes --namespace test3 -o jsonpath="{.items[0].status.addresses[0].address}")
+
+    echo http://$NODE_IP:$NODE_PORT
+
+2) Checking status of pod
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: bash
+
+   kubectl get pods --all-namespaces | grep -i so
+
+   NAMESPACE       NAME                                    READY     STATUS             RESTARTS   AGE
+
+   test3           bkup-so-7668c746c-vngk8                 2/2       Running            0          8m
+
+   test3           bkup-so-db-744fccd888-w67zk             1/1       Running            0          8m
+
+
+3) Creating backup of deployment
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Here I am using selector label as release name
+
+.. code-block:: bash
+
+   ./velero backup create so-backup --selector release=bkup
+
+   Backup request "so-backup" submitted successfully.
+
+   Run `velero backup describe so-backup` for more details.
+
+
+4) Checking backup logs
+~~~~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: bash
+
+   ./velero backup describe so-backup
+
+   Name:         so-backup
+
+   Namespace:    velero
+
+   Labels:       <none>
+
+   Annotations:  <none>
+
+   Phase:  Completed
+
+
+   Namespaces:
+
+      Included:  *
+
+      Excluded:  <none>
+
+
+   Resources:
+
+      Included:        *
+
+      Excluded:        <none>
+
+      Cluster-scoped:  auto
+
+
+   Label selector:  release=bkup
+
+
+   Snapshot PVs:  auto
+
+
+   TTL:  720h0m0s
+
+
+   Hooks:  <none>
+
+
+   Backup Format Version:  1
+
+   Started:    2018-07-20 07:09:51 +0000 UTC
+
+   Completed:  2018-07-20 07:09:53 +0000 UTC
+
+   Expiration:  2018-08-19 07:09:51 +0000 UTC
+
+   Validation errors:  <none>
+
+   Persistent Volumes: <none included>
+
+5) Simulating a disaster
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: bash
+
+   helm delete --purge bkup
+
+   release "bkup" deleted
+
+6)Restoring the kubernetes resources using velero
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: bash
+
+   ./velero restore create --from-backup so-backup
+
+    Restore request "so-backup-20180720071236" submitted successfully.
+
+    Run `velero restore describe so-backup-20180720071236` for more details.
+
+
+7) Checking restoration logs
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: bash
+
+  ./velero restore describe so-backup-20180720071236
+
+  Name:         so-backup-20180720071236
+
+  Namespace:    velero
+
+  Labels:       <none>
+
+  Annotations:  <none>
+
+
+  Backup:  so-backup
+
+  Namespaces:
+
+    Included:  *
+
+    Excluded:  <none>
+
+
+  Resources:
+
+    Included:        *
+
+    Excluded:        nodes, events, events.events.k8s.io, backups.ark.heptio.com, restores.ark.heptio.com
+
+    Cluster-scoped:  auto
+
+
+  Namespace mappings:  <none>
+
+  Label selector:  <none>
+
+
+  Restore PVs:  auto
+
+  Phase:  Completed
+
+  Validation errors:  <none>
+
+  Warnings:  <none>
+
+  Errors:    <none>
+
+
+8)Check backup files
+~~~~~~~~~~~~~~~~~~~~
+
+As we are using Minio which is local storage with aws s3 capabilities. Thus our all the backup files are being stored in locally in Minio Pod. Let's see where the backup files are being genreted.
+
+.. code-block:: bash
+
+   kubectl get pod -n velero
+   NAME                      READY   STATUS      RESTARTS   AGE
+   minio-d9c56ff5-cg8zp      1/1     Running     0          4d5h
+   minio-setup-ph8pk         0/1     Completed   0          4d5h
+   velero-74cdf64d76-t8wfs   1/1     Running     0          4d5h
+
+.. code-block:: bash
+
+   kubectl exec -it -n velero minio-d9c56ff5-cg8zp  ls storage/velero/backups/
+   so-backup
+   aarna@anod-master:~$
+
+   kubectl exec -it -n velero minio-d9c56ff5-cg8zp  ls storage/velero/backups/so-backup
+   so-backup-csi-volumesnapshotcontents.json.gz
+   so-backup-csi-volumesnapshots.json.gz
+   so-backup-logs.gz
+   so-backup-podvolumebackups.json.gz
+   so-backup-resource-list.json.gz
+   so-backup-volumesnapshots.json.gz
+   so-backup.tar.gz
+   velero-backup.json
+
+
+9) Restore run
+~~~~~~~~~~~~~~
+
+.. code-block:: bash
+
+   ./velero  restore get
+
+    NAME                          BACKUP         STATUS      WARNINGS   ERRORS    CREATED                         SELECTOR
+
+    so-backup-20180720071236      so-backup      Completed   0          0         2018-07-20 07:12:36 +0000 UTC   <none>
+
+
+10) Check the pod status
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: bash
+
+   kubectl get pods --all-namespaces | grep -i so
+
+   NAMESPACE       NAME                                    READY     STATUS             RESTARTS   AGE
+
+   test3           bkup-so-7668c746c-vngk8                 2/2       Running            0          8m
+
+   test3           bkup-so-db-744fccd888-w67zk             1/1       Running            0          8m
+
+
+
+Another Example with DB and PV Backup
+-------------------------------------
+
+APPC component backup and restoration
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: bash
+
+   kubectl get pods --all-namespaces | grep -i appc
+   onap bk-appc-0 1/2 Running 0 1m
+   onap bk-appc-cdt-7cd6f6d674-5thwj 1/1 Running 0 1m
+   onap bk-appc-db-0 2/2 Running 0 1m
+   onap bk-appc-dgbuilder-59895d4d69-7rp9q 1/1 Running 0 1m
+
+
+Creating dummy entry in db
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: bash
+
+   kubectl exec -it -n default bk-appc-db-0 bash
+   Defaulting container name to appc-db.
+   Use 'kubectl describe pod/bk-appc-db-0 -n onap' to see all of the containers in this pod.
+   root@bk-appc-db-0:/#
+   root@bk-appc-db-0:/#
+   root@bk-appc-db-0:/#
+   root@bk-appc-db-0:/# mysql -u root -p
+   Enter password:
+   Welcome to the MySQL monitor. Commands end with ; or \g.
+   Your MySQL connection id is 42
+   Server version: 5.7.23-log MySQL Community Server (GPL)
+
+   Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
+
+   Oracle is a registered trademark of Oracle Corporation and/or its
+   affiliates. Other names may be trademarks of their respective
+   owners.
+
+   Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
+
+   mysql>
+   mysql>
+   mysql>
+   mysql> connect mysql
+   Reading table information for completion of table and column names
+   You can turn off this feature to get a quicker startup with -A
+
+   Connection id: 44
+   Current database: mysql
+
+   mysql>
+   mysql>
+   mysql> select * from servers;
+   Empty set (0.00 sec)
+
+   mysql> desc servers;
+   +-------------+----------+------+-----+---------+-------+
+   | Field | Type | Null | Key | Default | Extra |
+   +-------------+----------+------+-----+---------+-------+
+   | Server_name | char(64) | NO | PRI | | |
+   | Host | char(64) | NO | | | |
+   | Db | char(64) | NO | | | |
+   | Username | char(64) | NO | | | |
+   | Password | char(64) | NO | | | |
+   | Port | int(4) | NO | | 0 | |
+   | Socket | char(64) | NO | | | |
+   | Wrapper | char(64) | NO | | | |
+   | Owner | char(64) | NO | | | |
+   +-------------+----------+------+-----+---------+-------+
+   9 rows in set (0.00 sec)
+
+   mysql> insert into servers values ("test","ab","sql","user","pwd",1234,"test","wrp","vaib");
+   Query OK, 1 row affected (0.03 sec)
+
+   mysql>
+   mysql>
+   mysql>
+   mysql> select * from servers;
+   +-------------+------+-----+----------+----------+------+--------+---------+-------+
+   | Server_name | Host | Db | Username | Password | Port | Socket | Wrapper | Owner |
+   +-------------+------+-----+----------+----------+------+--------+---------+-------+
+   | abc | ab | sql | user | pwd | 1234 | test | wrp | vaib |
+   +-------------+------+-----+----------+----------+------+--------+---------+-------+
+   1 row in set (0.00 sec)
+
+   mysql>
+   mysql>
+   mysql> exit
+   Bye
+   root@bk-appc-db-0:/#
+   root@bk-appc-db-0:/#
+   root@bk-appc-db-0:/# exit
+   command terminated with exit code 127
+   kubectl get pods --all-namespaces | grep -i appc
+   onap bk-appc-0 1/2 Running 0 5m
+   onap bk-appc-cdt-7cd6f6d674-5thwj 1/1 Running 0 5m
+   onap bk-appc-db-0 2/2 Running 0 5m
+   onap bk-appc-dgbuilder-59895d4d69-7rp9q 1/1 Running 0 5m
+
+
+Creating dummy file in APPC PV
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.. code-block:: bash
+
+   kubectl exec -it -n onap bk-appc-0 bash
+   Defaulting container name to appc.
+   Use 'kubectl describe pod/bk-appc-0 -n onap' to see all of the containers in this pod.
+   root@bk-appc-0:/#
+   root@bk-appc-0:/#
+   root@bk-appc-0:/#
+   root@bk-appc-0:/# cd /opt/opendaylight/current/daexim/
+   root@bk-appc-0:/opt/opendaylight/current/daexim# ls
+   root@bk-appc-0:/opt/opendaylight/current/daexim# ls
+   root@bk-appc-0:/opt/opendaylight/current/daexim#
+   root@bk-appc-0:/opt/opendaylight/current/daexim#
+   root@bk-appc-0:/opt/opendaylight/current/daexim# touch abc.txt
+   root@bk-appc-0:/opt/opendaylight/current/daexim# ls
+   abc.txt
+   root@bk-appc-0:/opt/opendaylight/current/daexim# exit
+   exit
+   root@rancher:~/oom/kubernetes# kubectl get pods --all-namespaces | grep -i appc
+   onap bk-appc-0 1/2 Running 0 6m
+   onap bk-appc-cdt-7cd6f6d674-5thwj 1/1 Running 0 6m
+   onap bk-appc-db-0 2/2 Running 0 6m
+   onap bk-appc-dgbuilder-59895d4d69-7rp9q 1/1 Running 0 6m
+
+
+Creating backup using velero
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: bash
+
+   ./velero backup create appc-bkup1 --selector release=bk
+    Backup request "appc-bkup1" submitted successfully.
+    Run `velero backup describe appc-bkup1` for more details.
+
+    ./velero backup describe appc-bkup1
+    Name: appc-bkup1
+    Namespace: velero
+    Labels: <none>
+    Annotations: <none>
+
+    Phase: Completed
+
+    Namespaces:
+    Included: *
+    Excluded: <none>
+
+    Resources:
+    Included: *
+    Excluded: <none>
+    Cluster-scoped: auto
+
+    Label selector: release=bk
+
+    Snapshot PVs: auto
+
+    TTL: 720h0m0s
+
+    Hooks: <none>
+
+    Backup Format Version: 1
+
+    Started: 2018-08-27 05:07:45 +0000 UTC
+    Completed: 2018-08-27 05:07:47 +0000 UTC
+
+    Expiration: 2018-09-26 05:07:44 +0000 UTC
+
+    Validation errors: <none>
+
+    Persistent Volumes: <none included>
+
+
+Simulating disaster by deleting APPC
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: bash
+
+   helm delete --purge bk
+   release "bk" deleted
+
+
+Restoration using velero
+~~~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: bash
+
+   ./velero restore create --from-backup appc-bkup1
+   Restore request "appc-bkup1-20180827052651" submitted successfully.
+   Run `velero restore describe appc-bkup1-20180827052651` for more details.
+
+Restoration details
+~~~~~~~~~~~~~~~~~~~
+
+Check the Restoration details immediately after restoration. Restoration process is in InProgress Phase. Please check the Phase.
+
+.. code-block:: bash
+
+   ./velero restore describe appc-bkup1-20180827052651
+   Name: appc-bkup1-20180827052651
+   Namespace: velero
+   Labels: <none>
+   Annotations: <none>
+
+   Backup: appc-bkup1
+
+   Namespaces:
+   Included: *
+   Excluded: <none>
+
+   Resources:
+   Included: *
+   Excluded: nodes, events, events.events.k8s.io, backups.ark.heptio.com, restores.ark.heptio.com
+   Cluster-scoped: auto
+
+   Namespace mappings: <none>
+
+   Label selector: <none>
+
+   Restore PVs: auto
+
+   Phase: InProgress
+
+   Validation errors: <none>
+
+   Warnings: <none>
+   Errors: <none>
+   ./velero restore describe appc-bkup1-20180827052651
+   Name: appc-bkup1-20180827052651
+   Namespace: velero
+   Labels: <none>
+   Annotations: <none>
+
+   Backup: appc-bkup1
+
+   Namespaces:
+   Included: *
+   Excluded: <none>
+
+   Resources:
+   Included: *
+   Excluded: nodes, events, events.events.k8s.io, backups.ark.heptio.com, restores.ark.heptio.com
+   Cluster-scoped: auto
+
+   Namespace mappings: <none>
+
+   Label selector: <none>
+
+   Restore PVs: auto
+
+   Phase: Completed
+
+   Validation errors: <none>
+
+
+   Warnings:   <error getting warnings: Get "http://minio.velero.svc:9000/velero/restores/dev-appc-1-20201108164330/restore-dev-appc-1-20201108164330-results.gz?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=minio%2F20201108%2Fminio%2Fs3%2Faws4_request&X-Amz-Date=20201108T183923Z&X-Amz-Expires=600&X-Amz-SignedHeaders=host&X-Amz-Signature=847bdbb0a76718220c40767c4837aa999a4da9ff1344e9b42d3c93f7009e6898": dial tcp: lookup minio.velero.svc on 127.0.0.53:53: no such host>
+
+   Errors:  <error getting errors: Get "http://minio.velero.svc:9000/velero/restores/dev-appc-1-20201108164330/restore-dev-appc-1-20201108164330-results.gz?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=minio%2F20201108%2Fminio%2Fs3%2Faws4_request&X-Amz-Date=20201108T183923Z&X-Amz-Expires=600&X-Amz-SignedHeaders=host&X-Amz-Signature=847bdbb0a76718220c40767c4837aa999a4da9ff1344e9b42d3c93f7009e6898": dial tcp: lookup minio.velero.svc on 127.0.0.53:53: no such host>
+
+This process might take some time to complete. When you check the Restoration details again after some time then the phase will show as Completed as shown below.
+
+.. code-block:: bash
+
+   ./velero restore describe appc-bkup1-20180827052651
+    Name: appc-bkup1-20180827052651
+    Namespace: velero
+    Labels: <none>
+    Annotations: <none>
+
+    Backup: appc-bkup1
+
+    Namespaces:
+    Included: *
+    Excluded: <none>
+
+    Resources:
+    Included: *
+    Excluded: nodes, events, events.events.k8s.io, backups.ark.heptio.com, restores.ark.heptio.com
+    Cluster-scoped: auto
+
+    Namespace mappings: <none>
+
+    Label selector: <none>
+
+    Restore PVs: auto
+
+    Phase: Completed
+
+    Validation errors: <none>
+
+    Warnings:   <error getting warnings: Get "http://minio.velero.svc:9000/velero/restores/dev-appc-1-20201108164330/restore-dev-appc-1-20201108164330-results.gz?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=minio%2F20201108%2Fminio%2Fs3%2Faws4_request&X-Amz-Date=20201108T183923Z&X-Amz-Expires=600&X-Amz-SignedHeaders=host&X-Amz-Signature=847bdbb0a76718220c40767c4837aa999a4da9ff1344e9b42d3c93f7009e6898": dial tcp: lookup minio.velero.svc on 127.0.0.53:53: no such host>
+
+    Errors:  <error getting errors: Get "http://minio.velero.svc:9000/velero/restores/dev-appc-1-20201108164330/restore-dev-appc-1-20201108164330-results.gz?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=minio%2F20201108%2Fminio%2Fs3%2Faws4_request&X-Amz-Date=20201108T183923Z&X-Amz-Expires=600&X-Amz-SignedHeaders=host&X-Amz-Signature=847bdbb0a76718220c40767c4837aa999a4da9ff1344e9b42d3c93f7009e6898": dial tcp: lookup minio.velero.svc on 127.0.0.53:53: no such host>
+
+
+List of restores
+~~~~~~~~~~~~~~~~
+
+.. code-block:: bash
+
+    ark restore get
+    NAME BACKUP STATUS WARNINGS ERRORS CREATED SELECTOR
+    appc-bkup-20180827045955 appc-bkup Completed 2 0 2018-08-27 04:59:52 +0000 UTC <none>
+    appc-bkup1-20180827052651 appc-bkup1 Completed 5 0 2018-08-27 05:26:48 +0000 UTC <none>
+    vid-bkp-20180824053001 vid-bkp Completed 149 2 2018-08-24 05:29:59 +0000 UTC <none>
+
+Completed status means the Restoration is done successfully.
+
+Restoration successful
+~~~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: bash
+
+   kubectl get pods --all-namespaces | grep -i appc
+   onap bk-appc-0 1/2 Running 0 26m
+   onap bk-appc-cdt-7cd6f6d674-5thwj 1/1 Running 0 26m
+   onap bk-appc-db-0 2/2 Running 0 26m
+   onap bk-appc-dgbuilder-59895d4d69-7rp9q 1/1 Running 0 26m
+   kubectl exec -it -n onap bk-appc-db-0 bash
+   Defaulting container name to appc-db.
+   Use 'kubectl describe pod/bk-appc-db-0 -n onap' to see all of the containers in this pod.
+   root@bk-appc-db-0:/#
+   root@bk-appc-db-0:/#
+   root@bk-appc-db-0:/#
+
+
+Restoration of db successful
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: bash
+
+   root@bk-appc-db-0:/# mysql -u root
+   ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
+   root@bk-appc-db-0:/# mysql -u root -p
+   Enter password:
+   Welcome to the MySQL monitor. Commands end with ; or \g.
+   Your MySQL connection id is 335
+   Server version: 5.7.23-log MySQL Community Server (GPL)
+
+   Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
+
+   Oracle is a registered trademark of Oracle Corporation and/or its
+   affiliates. Other names may be trademarks of their respective
+   owners.
+
+   Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
+
+   mysql> connect mysql
+   Reading table information for completion of table and column names
+   You can turn off this feature to get a quicker startup with -A
+
+   Connection id: 337
+   Current database: mysql
+
+   mysql> select * from servers;
+   +-------------+------+-----+----------+----------+------+--------+---------+-------+
+   | Server_name | Host | Db | Username | Password | Port | Socket | Wrapper | Owner |
+   +-------------+------+-----+----------+----------+------+--------+---------+-------+
+   | abc | ab | sql | user | pwd | 1234 | test | wrp | vaib |
+   +-------------+------+-----+----------+----------+------+--------+---------+-------+
+   1 row in set (0.00 sec)
+
+   mysql> quit
+   Bye
+   root@bk-appc-db-0:/# exit
+   exit
+
+
+Restoration of PV successful
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: bash
+
+   kubectl get pods --all-namespaces | grep -i appc
+   onap bk-appc-0 1/2 Running 0 27m
+   onap bk-appc-cdt-7cd6f6d674-5thwj 1/1 Running 0 27m
+   onap bk-appc-db-0 2/2 Running 0 27m
+   onap bk-appc-dgbuilder-59895d4d69-7rp9q 1/1 Running 0 27m
+   kubectl exec -it -n onap bk-appc-0 bash
+   Defaulting container name to appc.
+   Use 'kubectl describe pod/bk-appc-0 -n onap' to see all of the containers in this pod.
+   root@bk-appc-0:/#
+   root@bk-appc-0:/#
+   root@bk-appc-0:/#
+   root@bk-appc-0:/#
+   root@bk-appc-0:/# cd /opt/opendaylight/current/daexim/
+   root@bk-appc-0:/opt/opendaylight/current/daexim# ls
+   abc.txt
+   root@bk-appc-0:/opt/opendaylight/current/daexim#
+   root@bk-appc-0:/opt/opendaylight/current/daexim#
+   root@bk-appc-0:/opt/opendaylight/current/daexim# exit
+   exit
+
+
+Use Cases
+---------
+
+Disaster recovery
+~~~~~~~~~~~~~~~~~
+
+Using Schedules and Restore-Only Mode
+
+If you periodically back up your cluster’s resources, you are able to return to a previous state in case of some unexpected mishap, such as a service outage.
+
+Cluster migration
+~~~~~~~~~~~~~~~~~
+
+Using Backups and Restores
+
+Velero can help you port your resources from one cluster to another, as long as you point each Velero Config to the same cloud object storage.
+
+References:
+https://github.com/vmware-tanzu/velero
diff --git a/docs/guides/onap-operator/platformoperations.rst b/docs/guides/onap-operator/platformoperations.rst
index 520586e84..3d4f8a614 100644
--- a/docs/guides/onap-operator/platformoperations.rst
+++ b/docs/guides/onap-operator/platformoperations.rst
@@ -76,9 +76,16 @@ functions
 ONAP Backup and Restore
 -----------------------
 
-To Backup ONAP a solution is described in Wiki (Migration to RTD->TBD):
+To backup and restore ONAP component specific databases you can follow the below link:
 
-`Backup and Restore Solution <https://wiki.onap.org/display/DW/Backup+and+Restore+Solution%3A+ONAP-OOM>`_
+.. toctree::
+  :maxdepth: 1
+
+  onap_backup_restore.rst
+
+.. note::
+  Refer to the wiki page for further details:
+  `Legacy Backup and Restore Solution <https://wiki.onap.org/display/DW/Backup+and+Restore+Solution%3A+ONAP-OOM>`_
 
 ONAP Multisite Deployment
 -------------------------