I am giving a talk for the Data on Kubernetes Community (DoKC) Community next week. They are a user group like community that focuses on how to build and operate data-centric applications on Kubernetes. Be sure to check them out! The DoK website is: https://dok.community.
My talk is titled: “Running Stateful Apps in Kubernetes Made Simple“
ABSTRACT OF THE TALK
Eventually, the time will come to run a stateful app in Kubernetes. This can be a scary thing adding more moving parts to a Kubernetes cluster and deploying as well as managing your app on Kubernetes when it requires state.
In this talk, Steve Buchanan will take you through a journey of understanding how storage works in Kubernetes, how to Persistent state with pods, what storage options are available with Azure Kubernetes Service, best practices, and a demo of deploying a stateful app to AKS.
In the demo, I will show how to deploy stateful Worpress & Jenkins workloads on Azure Kubernetes Service using the GitOps model with Argo CD.
KEY TAKE-AWAYS FROM THE TALK
Overview of Storage in Kubernetes covering Storage Classes, Persistent Volumes, & Persistent Volume Claims. Overview of Azure Storage, Best Practices to running stateful apps in Kubernetes.
This was a fun podcast with Jez Ward, and Dave Chapman of Cloudreach. They run a podcast called Cloudbusting. On the podcast they focus on transformation, leadership, ways of working and emerging technology they explore the significant impact that cloud is having on people and businesses.
On this podcast episode, we set out to answer very important questions such as what are Jucy Lucy’s?, what are root Canals like today? oh, and yeah we also spend some time talking about what Containers, Kubernetes, & GitOps are and how they fit in the cloud.
With the growth of Kubernetes, the complexity & needs have also grown. IT Professionals need help with the operational & security challenges of managing Kubernetes clusters across multiple clouds, on-premises, & the edge.
My new course will teach you how to use Rancher for multi-Kubernetes cluster management, streamlining Kubernetes cluster deployments, & unified multi-Kubernetes cluster app management. When you’re finished with this course, you’ll have the skills and knowledge of Rancher needed for multi-K8s cluster management.
There is a learning path on Pluralsight focused on Kubernetes management. This is my 3rd course in the Kubernetes Management pathtitled “Kubernetes Tooling and Techniques” on Pluralsight. My other courses in the path are: “GitOps: The Big Picture” and “Getting Started with Argo CD“. You can get to the path using this link: https://app.pluralsight.com/paths/skills/kubernetes-tooling-and-techniques
I hope you find value in this new Getting Started with Rancher course. Be sure to follow my profile on Pluralsight so you will be notified as I release new courses related to Kubernetes and other topics!
Argo CD is a GitOps operator and the goal of it is to be able to deploy apps to Kubernetes. In the majority of cases, we want to use Argo CD to deploy apps to many clusters.
Argo CD itself is deployed as a set of pods on a Kubernetes cluster. By default with an Argo CD deployment, the cluster it is running on is set as “in-cluster” (https://kubernetes.default.svc). When apps are configured for deployment a Kubernetes Cluster under Destination is required. They can be deployed to either the “in-cluster” K8s cluster or an external K8s cluster.
In order to deploy apps to an external Kubernetes cluster, you will need to register an external K8s cluster with Argo CD.
If you want to see the clusters you have registered with your Argo CD one way is through the web UI. Once you log in navigate to Settings and then Clusters to see them.
You can also see the clusters you have in the Argo CD CLI. To use the Argo CD CLI you need to log into the Argo CD API Server as shown in the following screenshot.
To see what clusters are registered from the CLI you can run
argocd cluster list
You will notice that you will only see the In-Cluster K8s cluster until you add an external one. Also, note that you are not able to register a new K8 cluster in the Argo CD web UI. You can only register a new K8s cluster from the Argo CD CLI. Within the Argo CD web UI you can delete the default in-cluster K8s cluster. This is not recommended.
If you click on the In-Cluster K8s cluster you can modify some settings of the in-cluster K8s cluster in the Argo CD web UI such as the name of it and its namespace. Not useful when you want to have more control over the settings around the K8s cluster you will be deploying apps to.
In my example, my Azure subscription has two AKS clusters. You can see this in the following screenshot. The arriving-gelding-k8s cluster is my In-Cluster object in Argo CD. The selected-worm-k8s is not my In-Cluster so I want to add this one to my Argo CD.
To add the new external cluster run use the following steps.
Step 1: Add your target K8s cluster to ArgoCD via the context in your kubectl config.
-For AKS you can simply log into your Azure subscription from VS Code on your computer and then run
az aks get-credentials –resource-group RGNAME –name AKSCLUSTERNAME
This will add the context for your AKS cluster to your kubeconfig file.
Step 2: List the K8 cluster contexts in your current kubeconfig file to ensure your target cluster has been added. Do this by locally running:
kubectl config get-contexts -o name
Step 3: Install a Service Account (argocd-manager), into the kube-system namespace of your kubeconfig file context:
argocd cluster add CONTEXTNAME
It will look like this:
After completing the previous steps you can run argocd cluster list again or go into the portal. You will see your new cluster added.
That wraps up this blog post. Now you should be able to deploy to more than just your In-Cluster Kubernetes cluster. Check back soon for more posts on Argo CD, GitOps, Kubernetes, and Azure topics.
In my last post on Argo CD with AKS, I mentioned the next post would explore deploying an app via Argo CD. Well, in this post we are going to do just that. I am going to walk through deploying an app from Argo CD to AKS. Note this same process would work for any Kubernetes cluster. This is not going to be a long post as the process is straightforward.
First of all, you can deploy an app from the Argo CD web UI or CLI. Ready your application in a Git-based repository. It does not matter what source control system you use for your repository as long as it is Git-based. You can use Azure DevOps, Gitlab, Bit Bucket etc. In my case I use GitHub. To deploy an app you need to point to a Git repository of either K8s manifest, Helm, or Kustomize. In this blog post I am going to keep it simple and use the Hello K8s app from Paul Bouwer. Ok, now let’s jump in.
Here are the steps for Deploying an App to Argo CD within the Web UI:
In the Argo CD web UI ensure you are on the Applications page
Click the + NEW APP button
Give the app the namehellok8s, use the project default (I used a dev project in my example), select Automatic for the sync policy, check AUTO-CREATE NAMESPACE
You can view the resources in AKS now. In the following screenshot you can see the deployment, pods, and service of a load balancer type.
You can also speed things up by deploying your app via the Argo CD CLI. This will accomplish the same goal as you would deploying the app via the Argo CD Web UI.
Yesterday my 12th course on Pluralsight was published! This course is “Getting Started with Argo CD“. In this course, you’ll learn the ins and outs of Argo CD a GitOps Operator tool, its core concepts, architecture, and how to use it with Kubernetes clusters so you can get started using it.
I am really excited about this course because it gave me a chance to continue sharing my GitOps and Kubernetes knowledge. You can view this course as a continuation of my “GitOps: The Big Picture” course. My GitOps course educates you on what GitOps is. This Argo CD course shows GitOps and a GitOps Operator in action!
Many organizations today have adopted cloud & Kubernetes. Organizations multiple production Kubernetes clusters online often across multiple clouds the complexity of management increases. GitOps has risen as a pattern used to reduce the complexity of managing Kubernetes clusters and cloud-native applications. Argo CD is a GitOps Operator that can help with the management of Kubernetes and deployment of applications to it. Some of the major topics that I covered in the Argo CD course include:
Argo CD’s core concepts and architecture.
An overview of Containers, Kubernetes, Helm, Kustomize, GitOps, and how these work with Argo CD.
What it takes to deploy and operate Argo CD including areas such as user management, secrets, webhooks, monitoring and more, as well as how to use the Argo CD API server, Web UI, and use its command line interface.
How to deploying and manage Applications with Argo CD.
This is my 1st course in the Kubernetes Tooling and Techniques path on Pluralsight. I am working on another course for this path. This path focuses on the additional tools and techniques that you can integrate with your Kubernetes operations to improve efficiency, scalability, and a whole host of other factors. There are some other great courses in the Kubernetes Tooling and Techniques path.
I hope you find value in this new Getting Started with Argo CD course. Be sure to follow my profile on Pluralsight so you will be notified as I release new courses including more GitOps related courses and a Rancher course in the Kubernetes Tooling and Techniques path!
On September 30th I will be speaking at the Jamaica Azure User Group giving an intro to GitOps and AKS!
Here is a breakdown of what I will be covering in this session:
CI/CD with Kubernetes on top of management of Kubernetes configuration management can be complex and intimidating. Application definitions, configurations, management, and continuous delivery for Kubernetes can be simplified, automated, and declarative. This can be achieved via GitOps.
Microsoft simplifies running Kubernetes with Azure Kubernetes Service (AKS) but it can still be complex when it comes to the management you are responsible for and application deployment.
In this session we will take a look at:
-An intro into AKS -An intro into GitOps -How you can utilize GitOps and git-based techniques with AKS to drive easier application deployment -How to use GitOps for configuration management of Kubernetes from your source control system
I have been attended DevOpsDays Minneapolis for 4 years. Its always a great event with rockstar speakers and great content. I also always meet some great folks in the DevOps space.
This year I will be speaking at DevOpsDays Minneapolis! This is a huge honor for me as I have a lot of respect for the event organizers and its always world-class event! I will be speaking about Kubernetes and GitOps. My session can be found here: https://devopsdays.org/events/2021-minneapolis/speakers/steve-buchanan
The event is July 20th-21st. It will be a hybrid event (in-person & virtual). I will be speaking in person on the 20th.
Here is my session info:
GitOps and Kubernetes: a Winning Combo
GitOps is an emerging pattern for cloud-native applications. This operating model simplifies Kubernetes ops while simultaneously improving the developer experience. GitOps enables continuous delivery of configuration updates and application deployments to Kubernetes.
Through the lens of GitHub, Argo CD, and Azure Kubernetes Service, we’ll explore use cases and benefits, principles and practices, architecture and tooling, and what GitOps changes in our day-to-day.
Today I delivered my session on GitOps and Kubernetes: a Winning Combo. This was my first in-person event since the pandemic in the US started. I went on stage right after Ian Coldwater gave the keynote. Ian had an amazing keynote talking about community, how the pandemic and the murder of George Floyd impacted Minneapolis last year along with how the community came together. I presented to a crowd of a few hundred as well as another couple hundred online.
The online reach of this event was amazing. I even received a message that my session was watched by some folks in Japan!
In my session, we went on a journey through how companies should focus on being software businesses moving to digital, how the pandemic accelerated companies and consumers going digital as well as companies using Kubernetes and GitOps as a way to help power digital transformation.
The conference organizers did a great job pulling off another excellent event while ensuring everyone followed safety guidelines.
I was recently a guest on New Relic‘s Developer Relations team podcast “Observy McObservface” with Jonan Scheffler.
Jonan Scheffler and I talk about Microsoft’s Azure Kubernetes Service (AKS), Linux on Azure, how Microsoft’s been successful at working in enterprise and open source, where I believe GitOps & Kubernetes is eventually going to go, and my excitement in regards to AI and blockchain as well as how they’re going to impact the world. You can listen to the podcast and read the article links below.
Today I went on “Tech Talk Wednesday” a podcast and radio show with Kazeem Adegboyega The topic was “30 Minutes of Azure Kubernetes Services (AKS)“. It streamed online via Microsoft Teams and aired in Lagos, Nigeria on Lagos State University (LASU) radio (95.7).
I had a great time talking with Kazeem! Even Sam Erskine made a guest appearance. If you missed the live show you can watch it on YouTube:
