IDFC FIRST Bank Interview Questions and Answers

To deploy a load balancer to a Kubernetes Cluster, you can use a Kubernetes Service of type LoadBalancer.

• Create a Kubernetes Service manifest with type LoadBalancer.

• Specify the ports and target port for the service.

• Apply the service manifest to the Kubernetes cluster.

• The cloud provider will provision a load balancer and assign an external IP to it.

• Clients can now access the application through the external IP of the load balancer.

Storage allocation and management on on-prem Kubernetes involves using persistent volumes and storage classes.

• Persistent volumes (PVs) are created and managed separately from pods.

• Storage classes define different types of storage and their properties.

• PVs are dynamically provisioned based on storage class definitions.

• Pods can request specific storage requirements using Persistent Volume Claims (PVCs).

Creating a Docker file involves defining the steps to build a Docker image.

• Start with a base image using the 'FROM' keyword

• Add any necessary dependencies or packages using 'RUN' commands

• Set environment variables with 'ENV' command

• Copy files or directories into the image using 'COPY' command

• Expose ports with 'EXPOSE' command

• Define the command to run when the container starts with 'CMD' or 'ENTRYPOINT' command

Key components of the Kubernetes control plane include API server, scheduler, controller manager, and etcd.

• API server: serves the Kubernetes API and is the front-end for the control plane

• Scheduler: responsible for assigning workloads to nodes based on resource availability

• Controller manager: manages different controllers that regulate the state of the cluster

• etcd: distributed key-value store that stores cluster state and configuration

Networking in a Kubernetes cluster is managed through various components like CNI plugins, Service objects, Ingress controllers, and Network Policies.

• Use Container Network Interface (CNI) plugins to enable communication between pods in the cluster.

• Utilize Service objects to expose pods internally or externally within the cluster.

• Implement Ingress controllers to manage external access to services within the cluster.

• Enforce network policies to control traffic flow and communica...read more

Chart.yaml defines metadata about the chart, while values.yaml contains configurable values for the chart.

• Chart.yaml contains metadata such as name, version, and description of the chart.

• values.yaml contains configurable values that can be overridden during chart installation.

• Chart.yaml is used for defining the structure of the chart, while values.yaml is used for customizing the chart.

• Example: Chart.yaml may have 'name: mychart' and 'version: 1.0.0', while values.yaml may ha...read more

Scheduler, API Server, and Ingress Controller are key components in Kubernetes responsible for scheduling, managing API requests, and managing external access to services.

• Scheduler: Component responsible for assigning workloads to nodes based on resource availability and constraints.

• API Server: Component that serves as the front-end for Kubernetes, handling API requests, authentication, and validation.

• Ingress Controller: Manages external access to services within a cluster, t...read more