Adenza Cloud Devops Engineer Interview Questions and Answers

Blue-green deployment in Kubernetes allows seamless updates with minimal downtime by switching traffic between two identical environments.

• Create two identical environments: 'blue' (current) and 'green' (new).

• Deploy the new version of the application to the 'green' environment.

• Use a Kubernetes Service to route traffic to the 'blue' environment initially.

• Switch the Service to point to the 'green' environment once testing...read more

Dynamically creating volumes in Kubernetes involves using Persistent Volume Claims (PVCs) and Storage Classes.

• Use a StorageClass to define the type of storage and its parameters.

• Create a Persistent Volume Claim (PVC) that requests storage from the StorageClass.

• Kubernetes will automatically provision a Persistent Volume (PV) based on the PVC.

• Example of a StorageClass definition: ```yaml apiVersion: storage.k8s.io/v1 kin...read more

Load balancers distribute traffic across servers, while Ingress manages external access to services in Kubernetes.

• Load balancers operate at Layer 4 (Transport) or Layer 7 (Application) of the OSI model.

• Ingress is specific to Kubernetes and provides HTTP routing to services based on rules.

• Load balancers can be hardware-based (like F5) or software-based (like HAProxy).

• Ingress controllers can use various backends, such as...read more

Syncing RDS databases across regions in AWS involves using read replicas or AWS Database Migration Service.

• Use Amazon RDS Read Replicas to create a read replica in another region for low-latency reads.

• Implement AWS Database Migration Service (DMS) for continuous data replication between RDS instances in different regions.

• Consider using Amazon Aurora Global Database for multi-region, low-latency reads and writes.

• Ensure ...read more