HorizontalAutoScaler in OpenShift/k8s

 1. HorizontalAutoScaler in OpenShift/k8s, 

Declerative:

apiVersion: autoscaling/v1

  kind: HorizontalPodAutoscaler

  metadata:

   name: php-apache

   namespace: hpa-test

  spec:

   scaleTargetRef:

     apiVersion: apps/v1

     kind: Deployment

     name: php-apache

   minReplicas: 1

   maxReplicas: 10

   targetCPUUtilizationPercentage: 50

kubectl command: kubectl -n hpa-test autoscale deployment php-apache --cpu-percent=50 --min=1 --max=5

2. Ingress Controller

- An ingress controller acts as a reverse proxy and load balancer. It implements a Kubernetes Ingress. The ingress controller adds a layer of abstraction to traffic routing, accepting traffic from outside the Kubernetes platform and load balancing it to Pods running inside the platform.

- Ingress exposes HTTP and HTTPS routes from outside the cluster to services within the cluster

3. Private endpoint. 

- A private endpoint is a network interface that uses a private IP address from your virtual network. This network interface connects you privately and securely to a service that's powered by Azure Private Link. By enabling a private endpoint, you're bringing the service into your virtual network

CDIR:

Classless or Classless Inter-Domain Routing (CIDR) addresses use variable length subnet masking (VLSM) to alter the ratio between the network and host address bits in an IP address. A subnet mask is a set of identifiers that returns the network address’s value from the IP address by turning the host address into zeroes.