> Samples > Domains > Model in image > Prerequisites

Prerequisites

The JAVA_HOME environment variable must be set and must reference a valid JDK 8 or 11 installation.
Get the operator source and put it in /tmp/weblogic-kubernetes-operator.

For example:
```
$ cd /tmp
```
```
$ git clone --branch v4.1.8
 https://github.com/oracle/weblogic-kubernetes-operator.git
```
NOTE: We will refer to the top directory of the operator source tree as /tmp/weblogic-kubernetes-operator; however, you can use a different location.

For additional information about obtaining the operator source, see the Developer Guide Requirements.
Copy the Model in Image sample to a new directory; for example, use directory /tmp/sample.
```
$ mkdir -p /tmp/sample
```
```
$ cp -r /tmp/weblogic-kubernetes-operator/kubernetes/samples/scripts/create-weblogic-domain/model-in-image/* /tmp/sample
```
NOTE: We will refer to this working copy of the sample as /tmp/sample; however, you can use a different location.

Copy the wdt-artifacts directory of the sample to a new directory; for example, use directory /tmp/sample/wdt-artifacts.

$ mkdir -p /tmp/sample/wdt-artifacts

$ cp -r /tmp/weblogic-kubernetes-operator/kubernetes/samples/scripts/create-weblogic-domain/wdt-artifacts/* /tmp/sample/wdt-artifacts

Download the latest WebLogic Deploy Tooling (WDT) and WebLogic Image Tool (WIT) installer ZIP files to your /tmp/sample/wdt-artifacts directory. Both WDT and WIT are required to create the images.

$ cd /tmp/sample/wdt-artifacts

$ curl -m 120 -fL https://github.com/oracle/weblogic-deploy-tooling/releases/latest/download/weblogic-deploy.zip \
  -o /tmp/sample/wdt-artifacts/weblogic-deploy.zip

$ curl -m 120 -fL https://github.com/oracle/weblogic-image-tool/releases/latest/download/imagetool.zip \
  -o /tmp/sample/wdt-artifacts/imagetool.zip

To set up the WebLogic Image Tool, run the following commands:
```
$ cd /tmp/sample/wdt-artifacts
```
```
$ unzip imagetool.zip
```
```
$ ./imagetool/bin/imagetool.sh cache deleteEntry --key wdt_latest
```
```
$ ./imagetool/bin/imagetool.sh cache addInstaller \
  --type wdt \
  --version latest \
  --path /tmp/sample/wdt-artifacts/weblogic-deploy.zip
```
Note that the WebLogic Image Tool cache deleteEntry command does nothing if the wdt_latest key doesn’t have a corresponding cache entry. It is included because the WIT cache lookup information is stored in the $HOME/cache/.metadata file by default, and if the cache already has a version of WDT in its --type wdt --version latest location, then the cache addInstaller command would fail. For more information about the WIT cache, see the WIT Cache documentation.

These steps will install WIT to the /tmp/sample/wdt-artifacts/imagetool directory, plus put a wdt_latest entry in the tool’s cache which points to the WDT ZIP file installer. You will use WIT and its cached reference to the WDT installer later in the sample for creating model images.
To set up the WebLogic Deploy Tooling that we will use later for the archive helper, run the following command:
```
$ unzip /tmp/sample/wdt-artifacts/weblogic-deploy.zip
```
Make sure an operator is set up to manage the namespace, sample-domain1-ns. Also, make sure a Traefik ingress controller is managing the same namespace and listening on port 30305. To do this, follow the same steps as the Quick Start guide up through the Prepare for a domain step.

Make sure you stop when you complete the “Prepare for a domain” step and then resume following these instructions.
Set up ingresses that will redirect HTTP from the Traefik port 30305 to the clusters in this sample’s WebLogic domains.
- Run kubectl apply -f on each of the ingress YAML files that are already included in the sample source directory:
```
$ kubectl apply -f https://raw.githubusercontent.com/oracle/weblogic-kubernetes-operator/release/4.1/kubernetes/samples/scripts/create-weblogic-domain/ingresses/traefik-ingress-sample-domain1-admin-server.yaml
$ kubectl apply -f https://raw.githubusercontent.com/oracle/weblogic-kubernetes-operator/release/4.1/kubernetes/samples/scripts/create-weblogic-domain/ingresses/traefik-ingress-sample-domain1-cluster-cluster-1.yaml
$ kubectl apply -f https://raw.githubusercontent.com/oracle/weblogic-kubernetes-operator/release/4.1/kubernetes/samples/scripts/create-weblogic-domain/ingresses/traefik-ingress-sample-domain2-cluster-cluster-1.yaml
```
NOTE: We give each cluster ingress a different host name that is decorated using both its operator domain UID and its cluster name. This makes each cluster uniquely addressable even when cluster names are the same across different clusters. When using curl to access the WebLogic domain through the ingress, you will need to supply a host name header that matches the host names in the ingress.

For more information on ingresses and load balancers, see Ingress.
Obtain the WebLogic 12.2.1.4 image that is referenced by the sample’s Domain resource YAML.

a. Use a browser to access the Oracle Container Registry.

c. Select Sign In and accept the license agreement.

d. Use your terminal to log in to the container registry: docker login container-registry.oracle.com.

e. Later in this sample, when you run WebLogic Image Tool commands, the tool will use the image as a base image for creating model images. Specifically, the tool will implicitly call docker pull for one of the previous licensed images as specified in the tool’s command line using the --fromImage parameter.

The example base images are General Availability (GA) images that are suitable for demonstration and development purposes only where the environments are not available from the public Internet; they are not acceptable for production use. In production, you should always use CPU (patched) images from OCR or create your images using the WebLogic Image Tool (WIT) with the --recommendedPatches option. For more guidance, see Apply the Latest Patches and Updates in Securing a Production Environment for Oracle WebLogic Server.