Title: Achieving Fixed Pod Assignment for Incoming Traffic using Kubernetes

Introduction:
In this article, we will discuss how to ensure that every incoming traffic is directed to a specific pod in a Kubernetes cluster. This can be achieved by leveraging the power of Kubernetes and adopting certain techniques while deploying and managing pods. We will explain the overall process and illustrate each step with relevant code snippets to guide newbies in implementing this feature.

Process Overview:
The following table summarizes the steps involved in achieving fixed pod assignment for incoming traffic in Kubernetes:

| Step | Description |
|----------|------------------------------------------------------------------------------------------------------------------------------------------|
| Step 1 | Create a Deployment or ReplicationController object to manage the pod lifecycle. |
| Step 2 | Define a Service to expose the pod(s) and provide load balancing capabilities. |
| Step 3 | Configure a stable, network-unique DNS name for the Service to ensure traffic is directed to the desired pod(s). |
| Step 4 | Implement a selector in the Deployment or ReplicationController to associate the pod(s) with the Service. |
| Step 5 | Test the setup by sending traffic to the stable DNS name associated with the Service and verify that it consistently hits the same pod. |

Step-by-Step Implementation:

Step 1: Create a Deployment or ReplicationController object
```yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-deployment
spec:
replicas: 3
selector:
matchLabels:
app: my-app
template:
metadata:
labels:
app: my-app
spec:
containers:
- name: my-pod
image: my-image:latest
```
Explanation:
In this step, we define a Deployment object named "my-deployment" with a replica count of 3. The selector field ensures that pods with the label "app: my-app" are associated with this Deployment. The template section defines the pod template and its container(s).

Step 2: Define a Service
```yaml
apiVersion: v1
kind: Service
metadata:
name: my-service
spec:
selector:
app: my-app
ports:
- protocol: TCP
port: 80
targetPort: 8080
type: ClusterIP
```
Explanation:
Here, we create a Service object named "my-service" that selects pods labeled with "app: my-app". The ports field exposes and maps port 80 of the Service to port 8080 of the pods. The type ClusterIP means the Service is only accessible within the cluster.

Step 3: Configure stable DNS name for the Service
```yaml
apiVersion: v1
kind: Service
metadata:
name: my-service
spec:
selector:
app: my-app
ports:
- protocol: TCP
port: 80
targetPort: 8080
type: ClusterIP
externalName: my-pod-service.example.com
```
Explanation:
To ensure a stable DNS name for the Service, we modify the Service configuration by adding the externalName field. In this example, the DNS name "my-pod-service.example.com" will be associated with the Service.

Step 4: Implement a selector in Deployment or ReplicationController
```yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-deployment
spec:
replicas: 3
selector:
matchLabels:
app: my-app
template:
metadata:
labels:
app: my-app
my-selector: my-pod-1
spec:
containers:
- name: my-pod
image: my-image:latest
```
Explanation:
By introducing a new label called "my-selector" with a specific value in the pod template's labels section, we associate a unique pod to the Deployment using this selector. In this case, "my-pod-1" is associated with the Deployment.

Step 5: Test the setup
Send traffic to the stable DNS name associated with the Service ("my-pod-service.example.com") and verify that it consistently hits the same pod.

Conclusion:
By following the above steps, one can achieve fixed pod assignment for incoming traffic in a Kubernetes cluster. The combination of Deployments/ReplicationControllers, Services, and selectors allows for controlled and consistent traffic distribution to pods based on specific requirements. Implementing this feature enhances scalability, availability, and reliability in Kubernetes-based applications. Happy coding!