The latest articles on DEV Community by Dhinesh Kumar (@dhinesh_kumar_4be5561ed81). https://dev.to/dhinesh_kumar_4be5561ed81 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F2604130%2F4057d46d-d153-4e21-89b2-98926c82c69b.png https://dev.to/dhinesh_kumar_4be5561ed81 en Dhinesh Kumar Wed, 01 Jan 2025 05:06:27 +0000 https://dev.to/dhinesh_kumar_4be5561ed81/all-about-k9scli-for-k8s-and-openshift-53nc https://dev.to/dhinesh_kumar_4be5561ed81/all-about-k9scli-for-k8s-and-openshift-53nc <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fpgtr09uthfl6j7ldv7xs.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fpgtr09uthfl6j7ldv7xs.png" alt="Image description" width="800" height="461"></a></p> <p>Note: Join our <a href="https://www.whatsapp.com/channel/0029Va4nG1pEVccDyLKwnW2M" rel="noopener noreferrer">Openshift Tips and Tricks WhatsApp Channel</a> and get regular Updates.</p> <p>Disclaimer: Please note k9s cli is a opensource and you may have to connect with product owners for any product related questions.</p> <p>Before proceeding, if you are new to OpenShift, please head to <a href="https://assistedcloud.com/openshift-for-beginners/" rel="noopener noreferrer">OpenShift for Beginners and learn about OpenShift</a>.<br> To know more kindly follow the link : <a href="https://assistedcloud.com/k9scli/" rel="noopener noreferrer">https://assistedcloud.com/k9scli/</a></p> openshift k9scli k8s benefits Dhinesh Kumar Tue, 31 Dec 2024 05:45:30 +0000 https://dev.to/dhinesh_kumar_4be5561ed81/openshift-machine-config-machine-config-pool-3k1b https://dev.to/dhinesh_kumar_4be5561ed81/openshift-machine-config-machine-config-pool-3k1b <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F0ispeoojnyq5t0ixer6o.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F0ispeoojnyq5t0ixer6o.png" alt="Image description" width="615" height="346"></a><br> I have experienced problems with OpenShift machine config pool during the time of upgrade, very slow rate of upgrade.. Without understanding what's happening inside.</p> <p>Understanding the machine config pool activities, status, it is difficult troubleshoot few problems and may create panic situations for your production cluster.</p> <p>I have created an Article about Machine config and Machine Config pool with few commands - especially status command saves lot of time.</p> <p>Reference: OpenShift Machine Config</p> <p>Overview of OpenShift Machine Config and Machine Config Pools<br> Machine Config<br> Example of a Machine Config<br> Machine Config Pool<br> Creating a Machine Config Pool</p> <p>Check it out and let me know if you need any specific inputs on it.</p> <p>Also please join our WhatsApp Channel for more up to date information.</p> <p><a href="https://www.whatsapp.com/channel/0029Va4nG1pEVccDyLKwnW2M" rel="noopener noreferrer">https://www.whatsapp.com/channel/0029Va4nG1pEVccDyLKwnW2M</a></p> openshift kubernetes ocp Dhinesh Kumar Mon, 23 Dec 2024 04:51:35 +0000 https://dev.to/dhinesh_kumar_4be5561ed81/openshift-interview-questions-expected-in-2025-updated-list-1oe4 https://dev.to/dhinesh_kumar_4be5561ed81/openshift-interview-questions-expected-in-2025-updated-list-1oe4 <p><a href="https://assistedcloud.com" rel="noopener noreferrer">OpenShift Interview Questions expected in 2025 (Updated List)</a></p> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F7m7pi7pmvze2ivwlfvq7.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F7m7pi7pmvze2ivwlfvq7.png" alt="Image description" width="600" height="315"></a></p> <ol> <li>What are the core components of OpenShift v4 infrastructure?</li> <li>Explain the architecture of OpenShift v4.</li> <li>What is the role of the etcd cluster in OpenShift v4?</li> <li>How do you secure an etcd cluster in OpenShift?</li> <li>What is the difference between master and worker nodes in OpenShift v4?</li> <li>How do you scale an OpenShift cluster?</li> <li>What are the prerequisites for installing OpenShift v4?</li> <li>How does OpenShift v4 handle networking?</li> <li>What is the purpose of the OpenShift SDN?</li> <li>Explain the use of Operator Framework in OpenShift v4.</li> <li>How do you configure persistent storage in OpenShift v4?</li> <li>What is the difference between internal and external storage in OpenShift?</li> <li>How is HA (High Availability) achieved in OpenShift v4?</li> <li>Explain the role of ingress controllers in OpenShift.</li> <li>How do you monitor an OpenShift v4 cluster?</li> <li>What tools can be used for logging in OpenShift?</li> <li>What is the purpose of the Machine Config Operator (MCO)?</li> <li>How do you patch OpenShift v4 nodes?</li> <li>Explain the role of bootstrap nodes in OpenShift v4 installation.</li> <li>How does OpenShift manage cluster upgrades?</li> <li>What is a cluster operator in OpenShift v4?</li> <li>How does OpenShift ensure the health of the cluster?</li> <li>What is the role of Prometheus in OpenShift v4?</li> <li>How is Grafana used in OpenShift for monitoring?</li> <li>How does OpenShift handle multi-tenancy?</li> <li>What is the difference between a namespace and a project in OpenShift?</li> <li>How do you enforce network policies in OpenShift?</li> <li>What is OpenShift’s approach to load balancing?</li> <li>Explain how DNS works in OpenShift v4.</li> <li>What are the default storage classes in OpenShift?</li> <li>How do you configure storage classes in OpenShift?</li> <li>What is OpenShift’s Machine API?</li> <li>How do you configure auto-scaling in OpenShift?</li> <li>How does OpenShift manage secrets and ConfigMaps?</li> <li>What is the purpose of the Cluster Version Operator (CVO)?</li> <li>How do you back up an OpenShift cluster?</li> <li>How do you restore an OpenShift cluster?</li> <li>What is the role of the Kubelet in OpenShift v4?</li> <li>How does OpenShift v4 integrate with external identity providers?</li> <li>What are the common authentication methods supported by OpenShift</li> <li>How do you implement RBAC in OpenShift?</li> <li>Explain the role of Service Accounts in OpenShift.</li> <li>How do you configure node selectors in OpenShift?</li> <li>What are tolerations and taints in OpenShift?</li> <li>How does OpenShift handle pod scheduling?</li> <li>What is the use of affinity and anti-affinity rules in OpenShift?</li> <li>Explain the role of the OpenShift API Server.</li> <li>What are the default security policies in OpenShift v4?</li> <li>How do you secure the OpenShift API?</li> <li>How does OpenShift manage cluster certificates?</li> <li>What is the role of the Image Registry in OpenShift?</li> <li>How do you manage images in OpenShift?</li> <li>What is the difference between a build and a deployment in OpenShift?</li> <li>How does OpenShift manage updates to applications?</li> <li>What is a StatefulSet in OpenShift, and when do you use it?</li> <li>Explain the concept of DeploymentConfig in OpenShift.</li> <li>How do you perform disaster recovery in OpenShift v4?</li> <li>What are the key logs to check during troubleshooting in OpenShift?</li> <li>How do you configure logging in OpenShift?</li> <li>What is OpenShift’s approach to CI/CD pipelines?</li> <li>How does OpenShift integrate with Jenkins?</li> <li>Explain the role of the OpenShift Router.</li> <li>How do you configure custom domains in OpenShift?</li> <li>What are the default logging options in OpenShift?</li> <li>How do you troubleshoot networking issues in OpenShift?</li> <li>Explain the use of OpenShift Service Mesh.</li> <li>How do you manage node upgrades in OpenShift v4?</li> <li>What is the purpose of a pod disruption budget in OpenShift?</li> <li>How does OpenShift handle rolling updates?</li> <li>How do you scale applications in OpenShift?</li> <li>What is the use of a Horizontal Pod Autoscaler in OpenShift?</li> <li>How does OpenShift handle cluster monitoring alerts?</li> <li>How do you integrate external monitoring tools with OpenShift?</li> <li>What is the importance of quotas in OpenShift?</li> <li>How do you manage resource limits in OpenShift?</li> <li>How does OpenShift handle application logs?</li> <li>Explain the concept of an Operator in OpenShift.</li> <li>What is OpenShift’s approach to container runtime security?</li> <li>How do you manage node roles in OpenShift?</li> <li>What is the purpose of node affinity in OpenShift?</li> <li>How do you troubleshoot pod performance issues in OpenShift?</li> <li>What are the default network plugins available in OpenShift?</li> <li>How do you configure OpenShift for multi-cloud deployments?</li> <li>What is the role of the cluster network operator?</li> <li>How does OpenShift manage API requests?</li> <li>How do you handle failed cluster upgrades in OpenShift?</li> <li>What are the best practices for OpenShift cluster security?</li> <li>How does OpenShift integrate with Helm charts?</li> <li>How do you manage third-party applications in OpenShift?</li> <li>What is OpenShift Pipelines, and how is it used?</li> <li>How do you configure node pools in OpenShift?</li> <li>What is the role of the OpenShift Web Console?</li> <li>How do you configure alerting in OpenShift?</li> <li>What are the default admission controllers in OpenShift?</li> <li>How do you handle node failures in OpenShift?</li> <li>What are the steps for cluster capacity planning in OpenShift?</li> <li>How do you configure OpenShift for hybrid cloud environments?</li> <li>How does OpenShift manage lifecycle hooks?</li> <li>What are the common issues during OpenShift installation?</li> <li>How do you troubleshoot cluster performance issues in OpenShift v4?</li> </ol> tutorial beginners database cloud