This course gives a clear insight into how to handle issues in containerized environments for both Docker and Kubernetes.

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Troubleshoot

Containers help applications easily be packaged and shipped to any environment. Two of the most popular container tools are Docker and Kubernetes. Depending on their utilization, containers can experience image build, pods and node failures, and communication issues. This course will help you learn how to handle those issues.

This course teaches you what containers are and why they were adopted. You’ll explore Docker images, review log files in Docker, inspect containers, and clean resources while learning to fix issues with Docker image builds and resolving Docker container network errors. Then, you’ll get an overview of Kubernetes, how to manage a cluster and resolve reliability issues, and how to fix pod, network, container, configuration, and ingress issues. Finally, you’ll create a robust container infrastructure.

By the end of this course, you’ll also have a strong grasp on approaching and handling container issues and troubleshooting various issues in Docker and Kubernetes.

Troubleshooting Docker and Kubernetes Containers

What’s not a feature of Kubernetes?

**(Fill in the blank.)** ________ is responsible for handling communication between the controller and the worker nodes.

(Fill in the blank.) ________ is responsible for handling communication between the controller and the worker nodes.

What’s *not* a command for inspecting a pod?

What’s not a command for inspecting a pod?

Which feature in Kubernetes ensures that a pod is fully initialized and ready to handle requests before it starts receiving traffic?

Which feature in Kubernetes ensures that a pod is fully initialized and ready to handle requests before it starts receiving traffic?

We deployed an application, and the pod is displaying the `ErrImageNeverPull` error. 

Which `imagePullPolicy` policy can we use to resolve the issue?

We deployed an application, and the pod is displaying the <code>ErrImageNeverPull</code> error.
Which <code>imagePullPolicy</code> policy can we use to resolve the issue?

Our manifest file will fail to deploy our pod and will display an `invalid value` error.

Our manifest file to be deployed has a container that’s designed to request `"400m"` and our resource limit is `"370m"`. 
What will happen to our pod or manifest file?

Our manifest file to be deployed has a container that’s designed to request <code>&quot;400m&quot;</code> and our resource limit is <code>&quot;370m&quot;</code>.
What will happen to our pod or manifest file?

Test yourself on what you’ve learned so far in this chapter.

Getting Started

Introducing Troubleshooting Containers

Troubleshooting Docker

Fixing Common Issues with Docker

Resolving Docker Container Networking Errors

Troubleshooting Kubernetes

Troubleshooting Further in Kubernetes

Troubleshooting Docker Image Build Issues

Conclusion

Quiz: Troubleshooting Kubernetes