Lbm Solutions Devops Engineer Interview Questions and Answers for Experienced

CICD stands for Continuous Integration/Continuous Deployment. Jenkinsfile functions include stages, steps, post, and more.

• CICD stands for Continuous Integration/Continuous Deployment

• Jenkinsfile functions include stages, steps, post, agent, environment, and more

• Stages define a series of tasks to be executed in a pipeline

• Steps define individual actions within a stage

• Post defines actions to be taken after the pipeline has...read more

Kubernetes is an open-source container orchestration platform for automating deployment, scaling, and management of containerized applications.

• Kubernetes helps in automating the deployment, scaling, and management of containerized applications.

• It allows for easy scaling of applications by adding or removing containers based on demand.

• Kubernetes provides features like service discovery, load balancing, and self-healing ...read more

Workspaces in Docker are isolated environments where developers can work on different projects without affecting each other.

• Workspaces allow developers to have separate environments for each project, preventing conflicts between dependencies.

• Each workspace has its own set of containers, volumes, and networks, ensuring isolation.

• Developers can easily switch between workspaces to work on different projects.

• Workspaces are...read more

Cost optimization in DevOps is achieved through efficient resource utilization, automation, and continuous monitoring.

• Implementing auto-scaling to dynamically adjust resources based on demand

• Using containerization to maximize resource utilization and reduce costs

• Leveraging cloud services for pay-as-you-go pricing model

• Implementing cost monitoring tools to identify and eliminate wasteful spending

• Optimizing code and infr...read more

Monitoring is done using Prometheus and Grafana. Prometheus collects metrics and Grafana visualizes them.

• Prometheus is an open-source monitoring and alerting toolkit

• It collects metrics from monitored targets by scraping HTTP endpoints

• Grafana is a visualization tool that creates dashboards for the collected metrics

• It allows users to create graphs, charts, and alerts based on the data from Prometheus

Kubernetes is an open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications.

• Kubernetes follows a master-slave architecture with a master node that controls multiple worker nodes.

• Master node includes components like API server, scheduler, controller manager, and etcd.

• Worker nodes run containers and include components like kubelet, kube-proxy, and con...read more

Kubernetes is an open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications.

• Kubernetes follows a master-slave architecture where the master node controls the cluster and the worker nodes run the containers.

• The master node consists of components like API server, scheduler, controller manager, and etcd.

• Worker nodes have components like kubelet, kube-p...read more

Ingress is a Kubernetes resource that manages external access to services within a cluster.

• Ingress allows external traffic to reach services within a Kubernetes cluster

• It acts as a layer 7 HTTP reverse proxy

• Ingress rules define how incoming requests should be routed to different services based on hostnames or paths

Docker is a containerization platform that allows developers to package applications with all dependencies into a standardized unit for easy deployment.

• Docker allows for consistent development, testing, and deployment environments across different systems.

• It improves scalability and resource utilization by isolating applications in lightweight containers.

• Docker simplifies the process of managing dependencies and config...read more

Jenkins pipeline is a suite of plugins that supports implementing and integrating continuous delivery pipelines.

• Jenkins pipeline allows defining the entire build process as code, making it easier to manage and version control.

• It enables automating the steps of building, testing, and deploying software applications.

• Pipeline scripts can be written in Groovy language and can be stored in a Jenkinsfile within the project's...read more

RBAC stands for Role-Based Access Control in Kubernetes, allowing administrators to control access to resources based on roles assigned to users.

• RBAC is a method of regulating access to computer or network resources based on the roles of individual users within an enterprise.

• In Kubernetes, RBAC allows cluster administrators to dynamically configure access policies through the API.

• Roles define a set of permissions, whil...read more

You can connect between 2 EC2 instances by using their private IP addresses or public DNS names.

• Use private IP addresses for communication within the same VPC

• Use public DNS names for communication across different VPCs or over the internet

Connections between public and private subnets are established using a NAT gateway or a NAT instance.

• Use a NAT gateway to allow instances in a private subnet to initiate outbound traffic to the internet while preventing inbound traffic from reaching those instances.

• Alternatively, use a NAT instance with a security group that only allows inbound traffic from instances in the public subnet.

• Ensure that the route tables fo...read more