10+ Green Valley Resort Interview Questions and Answers

Auto scaling can be achieved through horizontal scaling and vertical scaling.

• Horizontal scaling involves adding more instances of the application to handle the increased traffic.

• Vertical scaling involves increasing the resources of the existing instances to handle the increased traffic.

• Auto scaling can be achieved through tools like AWS Auto Scaling, Kubernetes Horizontal Pod Autoscaler, etc.

• Metrics like CPU utilization, network traffic, and request latency can be used to tri...read more

Deployment strategies are different ways to release software changes to production.

• Blue/Green Deployment

• Canary Deployment

• Rolling Deployment

• A/B Testing

• Shadow Deployment

Dangling images in Docker are unused images that are not associated with any container.

• Dangling images can accumulate over time and take up valuable disk space.

• They can be removed using the 'docker image prune' command.

• An example of a dangling image is an image that was created but not used in any container.

• Dangling images can also be created when a container is stopped and a new image is built using the same name.

Auto scaling pods in k8s can be achieved using Horizontal Pod Autoscaler (HPA) and Kubernetes Metrics Server.

• Create a Deployment or ReplicaSet for the pod

• Enable metrics server to collect resource utilization data

• Create an HPA object and set the minimum and maximum number of replicas

• Set the target CPU utilization percentage for the HPA

• HPA will automatically adjust the number of replicas based on resource utilization

• Example: kubectl autoscale deployment my-deployment --cpu-perc...read more

Use disk cleanup, delete old builds, limit log retention, and use thin backup to save space in Jenkins.

• Use disk cleanup to remove unnecessary files and temporary data.

• Delete old builds that are no longer needed.

• Limit log retention to reduce the amount of space used by logs.

• Use thin backup to backup only essential data and save space.

• Consider using external storage solutions for larger Jenkins instances.

K8s cluster can be monitored using various tools and techniques.

• Use Kubernetes Dashboard to view the status of the cluster and its resources

• Use Prometheus and Grafana for monitoring and alerting

• Use Kubernetes events to track changes and issues

• Use logging tools like ELK stack or Fluentd to collect and analyze logs

• Use container monitoring tools like cAdvisor or Sysdig

• Use third-party monitoring tools like Datadog or New Relic

Secure Jenkins by implementing authentication, authorization, and encryption.

• Implement authentication using plugins like LDAP or Active Directory.

• Use role-based access control to ensure only authorized users have access to Jenkins.

• Enable HTTPS encryption to secure communication between Jenkins and users.

• Regularly update Jenkins and its plugins to patch security vulnerabilities.

• Use security-focused plugins like OWASP Markup Formatter and Static Analysis Utilities.

• Limit access ...read more

Ansible and Terraform are both infrastructure as code tools used for automation and configuration management.

• Ansible is a tool for automating software provisioning, configuration management, and application deployment.

• Terraform is a tool for building, changing, and versioning infrastructure safely and efficiently.

• Ansible uses YAML-based playbooks to define tasks and configurations, while Terraform uses a domain-specific language (DSL) called HCL.

• Both tools are popular in the ...read more

K8s architecture is a container orchestration system that manages containerized applications across a cluster of nodes.

• K8s architecture consists of a master node and worker nodes.

• The master node manages the cluster and schedules workloads on worker nodes.

• Worker nodes run the containers and communicate with the master node.

• K8s architecture includes components such as etcd, kube-apiserver, kube-controller-manager, kube-scheduler, kubelet, and kube-proxy.

• K8s architecture allows ...read more