Data Virtualization Operator

Description

Data Virtualization (DV) system allows applications to access data from multiple, heterogeneous data stores. Through its abstraction and federation layers, data is accessed and integrated in real-time across distributed data sources without copying or otherwise moving data from its system of record.

For example, you can access your all data in Oracle, Postgres, MongoDB and/or Rest API (many more) with a single request. Data Virtualization gives you all the tools required to build logical/abstraction layer that can exposed as Virtual Database by essentially making all sources underneath as a black box to the consuming user. Since this integration of data happens in real time there is no ETL process to run and data is always fresh. For the end user the Virtual Database exactly looks like a relational database like Postgres, that can be accessed using JDBC, ODBC, OData V4 and Postgres protocols, i.e. can be accessed from any language that you have your application written in.

DV, out of box also exposes the OData v4 REST API without any further coding, with this you can expose you single or multiple databases as rest services without any coding. Alternatively if you want expose a Open API directly over your data that is also possible with DV.

### Before you begin
You must configure authentication to Red Hat container registry before you can import and use the Red Hat Fuse OpenShift Image Streams. Follow instruction given below to configure the registration to container registry.

1. Log in to the OpenShift Server as an administrator, as follow:
    ```
    oc login -u system:admin
    ```
2. Log in to the OpenShift project where you will be installing the operator.
    ```
    oc project dv-project
    ```
3. Create a docker-registry secret using either Red Hat Customer Portal account or Red Hat Developer Program account credentials.
    ```
    oc create secret docker-registry dv-pull-secret \
      --docker-server=registry.redhat.io \
      --docker-username=CUSTOMER_PORTAL_USERNAME \
      --docker-password=CUSTOMER_PORTAL_PASSWORD \
      --docker-email=EMAIL_ADDRESS

    oc secrets link builder dv-pull-secret
    oc secrets link builder dv-pull-secret --for=pull
    ```
    NOTE: You need to create a docker-registry secret in every new namespace where the image streams reside and which use registry.redhat.io.

    If you do not wish to use your Red Hat account username and password to create the secret, it is recommended to create an authentication token using a [registry service account](https://access.redhat.com/terms-based-registry/).

### How to install
- When the operator is installed (you have created a subscription and the operator is running in the selected namespace) and before you create a new CR of Kind VirtualDatabase, you have to link the secret created in the previous section to the operator service account.
```
oc secrets link dv-operator dv-pull-secret --for=pull
```

- Create a new CR of Kind VirtualDatabase (click the Create New button). The CR spec contains all defaults (see below).