Overview/Description
Troubleshooting is a critical yet complicated task in Kubernetes. Monitoring the right metrics and setting alerts is essential to identify an issue's root cause. In this course, you'll learn to dig deep and investigate every component of a Kubernetes cluster, uncovering the root causes of common Kubernetes issues and taking appropriate action to troubleshoot them. Some of the items you'll explore include the Kubernetes components to consider when planning troubleshooting, the commands for troubleshooting cluster components, techniques for troubleshooting etcd database, and the critical problems and recommended troubleshooting approaches associated with managing Pods. Items you'll practice troubleshooting include issues associated with kubeadm installation, Kubernetes cluster components, Kubernetes resource configuration, Kubernetes Services, Pods remaining in a pending and unschedulable state, and Pod failure CrashLoopBackOff scenarios. This course is part of a series that aligns with the Certified Kubernetes Administrator exam's objectives and can be used in preparation for it.
recognize the Kubernetes components that need to be investigated when planning troubleshooting
list the commands that can be used to troubleshoot components of Kubernetes clusters
outline the techniques that can be adopted to troubleshoot issues with etcd database
list the critical problems faced by administrators while managing Pods and describe the recommended approaches to fixing identified issues
use commands to investigate if Kubernetes services are active and enabled
list the common failure scenarios when installing or running kubeadm and illustrate the steps to understand and troubleshoot them
demonstrate the steps to troubleshoot a Pod failure CrashLoopBackOff scenario
recognize the critical errors in the configuration of Kubernetes resources and the common error messages that help troubleshoot configuration issues and eliminate errors
name the critical issues that force a Pod to remain stuck in a pending state and result in an unschedulable Pod and describe the recommendations to avoid such critical issues
troubleshoot Kubernetes Service issues when the Service is using a different namespace or is simply not available
describe the steps that can be adopted to dig deep and investigate every component of a Kubernetes cluster to identify scenarios and root causes of problems along with the recommended actions for mitigating and resolving such issues
demonstrate an end-to-end diagnosis process and the troubleshooting steps to investigate, track, and fix issues with Pods and Services