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Your first Kubernetes Pod and ReplicaSet (LABS)

You've created your Kubernetes cluster and now it's time to put it to use. In this second lab you'll create your first Kubernetes Pod and your first Kubernetes ReplicaSet
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Creating a Kubernetes cluster in Google Cloud (LAB)

In this first lab in the series of Kubernetes labs, we'll learn how to create a Kubernetes cluster in Google Cloud
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Container Lifecycle Hooks

The concept of hooks is well-known in the tech world. Events usually trigger hooks, and they allow developers to react to those events and run some custom code. But how can you do the same in the context of Kubernetes and containers?
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Maybe Convert Wasm Extension Config?

Have you ever said "THIS WORKED YESTERDAY!!". Yeah, me too. This could also be titled Living on the edge with Wasm or The tale of a stray character or How I spent way more time I would like to admit, fixing an issue that was completely my fault
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GetIstio - CLI, training, and community

GetIstio CLI was released this week. GetIstio features aCLI that offers an easier way to install and upgrade Istio, a free Istio Fundamentals training, and a community, with the first meeting coming up on February 18th.
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Attach multiple VirtualServices to Istio Gateway

In this post, you'll learn how to expose multiple Kubernetes services running inside your cluster using Istio' Gateway and VirtualService resources.
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Exploring Kubernetes Volumes

Running stateful workloads inside Kubernetes is different from running stateless services. The reason being is that the containers and Pods can get created and destroyed at any time. If any of the cluster nodes go down or a new node appears, Kubernetes needs to reschedule the Pods. When Pods get rescheduled, what happens with data? This article talks about Kubernetes Volumes and how to use them to store the data outside of your containers.
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Send a Slack message when Docker images are updated

I needed a way to send a notification to a Slack channel, whenever I push new versions of Docker images to the registry. This post, I explain how I created a function that uses a container registry webhook to call a serverless function that sends a message to a Slack channel.
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Kubernetes Network Policy

Using the NetworkPolicy resource, you can control the traffic flow for your applications in the cluster, at the IP address level or port level (OSI layer 3 or 4).
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Ambassador Container Pattern

The ambassador container pattern aims to hide the primary container's complexity and provide a unified interface through which the primary container can access services outside of the Pod.
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Start Kubernetes Release

Start Kubernetes will teach you everything you need to know to use Kubernetes effectively.
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Sidecar Container Pattern

The sidecar container aims to add or augment an existing container's functionality without changing the container. In comparison to the init container from the previous article, the sidecar container starts and runs simultaneously as your application container. The sidecar is just a second container you have in your container list, and the startup order is not guaranteed.
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Kubernetes Init Containers

Init containers allow you to separate your application from the initialization logic and provide a way to run the initialization tasks such as setting up permissions, database schemas, or seeding data for the main application, etc. The init containers may also include any tools or binaries that you don't want to have in your primary container image due to security reasons.
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Deploying multiple Istio Ingress Gateways

Istio allows you to enable or disable different components, as well as tweak the configuration for them. However, what do you do if you want to deploy another ingress gateway? In this article, I go through a couple of exercises and try to deploy a second ingress gateway.
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Branch by Abstraction Pattern

The strangler pattern is useful for scenarios where you can intercept the calls at the edge of your monolithic application. But what do you do in a scenario where the functionality you're trying to extract is not called directly from the outside, rather it is being called from multiple other places inside the monolith?
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The Strangler Pattern

The strangler pattern is used in scenarios when you're migrating from monolithic systems by extracting pieces of functionality and moving that functionality into new services. This article explains how the pattern works and how to implement it.
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Kubernetes Development Environment with Skaffold

One part of the Start Kubernetes course I am working on (in addition to the book and videos) is the interactive labs. The purpose of these labs is to help you learn Kubernetes by solving different tasks, such as creating pods, scaling deployments, and so on. What follows is a quick explanation of how the end-user experience looks like and how I've set up my development environment for it.
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Securing Kubernetes Ingress with Ambassador and Let's Encrypt

In addition to routing the incoming requests or exposing service API's through a single endpoint, the ingress gateways does other tasks, such as rate limiting, SSL termination, load balancing, authentication, circuit breaking and more. In this article I will show you how to install the Ambassador Gateway and other components to be able to obtain an SSL certificate for your application.
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All About the Ingress Resource

You deployed your applications to Kubernetes and now you need a way for your users to access them. You can do that with a Kubernetes Ingress resource and an Ingress controller. This article explains all about the Ingress resource and shows you how to expose multiple applications through a domain, subdomain and on a different URL path.
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How to quarantine Kubernetes pods?

To investigate and debug the containers within a pod you need to remove the pod from the load balancing pool, so none of the traffic gets sent to it. This tip shows you how to do that.
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