How To Set the Application Reconciliation Timeout in Argo CD

Argo CD has something called the Application reconciliation timeout. This is how often your applications will sync from Argo CD to the Git repository. It looks for changes and when it sees changes it will then apply the desired state from the repo to the Kubernetes (K8s) cluster. By default the timeout period is set to 3 minutes. This is set in the General Argo CD configuration.

The General Argo CD configuration is set in the argocd-cm ConfigMap. And the argocd-cm ConfigMap is deployed in the argocd namespace.

You can view what is currently set by running the following kubectl command on your K8s cluster that is running your Argo CD instance:

kubectl describe configmaps argocd-cm -n argocd

The output will look like the following:

You can also see that the argocd-cm Data is empty by running kubectl get configmaps -n argocd or if you are using AKS navigate to ConfigMaps in the Azure portal like in the following screenshot.

Most Argo CD instances are running the default settings for its configurations. The argocd-server component reads and writes to the argocd-cm ConfigMap and other Argo configuration ConfigMaps based on admin user interactions with the Argo CD web UI or the Argo CD CLI. It is normal for it to be empty with Data at 0 if you have not changed any defaults or set anything directly in the ConfigMap yet.

To change the Application reconciliation timeout you need to do the following:

  1. Get a copy of the argocd-cm ConfigMap here: https://github.com/argoproj/argo-cd/blob/master/docs/operator-manual/argocd-cm.yaml
  2. The Application reconciliation timeout can be found on line 283 “timeout.reconciliation: 180s”.
  3. Change “180s” to whatever number you want to change it to i.e. change to “60s” to reduce the sync internal to 1 minute.
  4. Remove all of the other settings in the file except for the Application reconciliation timeout. The file should look like this:
apiVersion: v1
kind: ConfigMap
metadata:
  name: argocd-cm
  namespace: argocd
  labels:
    app.kubernetes.io/name: argocd-cm
    app.kubernetes.io/part-of: argocd
data:
  # Application reconciliation timeout is the max amount of time required to discover if a new manifests version got
  # published to the repository. Reconciliation by timeout is disabled if timeout is set to 0. Three minutes by default.
  # > Note: argocd-repo-server deployment must be manually restarted after changing the setting.
  timeout.reconciliation: 60s

5. Save the file.

6. Connect to the Kubernetes cluster that is running Argo CD and apply the argocd-cm ConfigMap file you just updated by running the following:

kubectl apply -f argocd-cm.yaml -n argocd

7. Run the following to verify the update was applied:

kubectl describe configmaps argocd-cm -n argocd

You should also notice at least 1 is listed under Data for the ConfigMap now.

8. It is a good practice to redeploy the argocd-repo-server after updating the argocd-cm ConfgigMap. You can redeploy the argocd-repo-server by running the following:

kubectl -n argocd rollout restart deploy argocd-repo-server

That’s it! Now your app in Argo CD will sync on the new Application Reconciliation Timeout that you set. Check back soon for more Azure, Cloud, Kubernetes, GitOps, Argo CD content and more.

BTW: For more in-depth information on GitOps and Argo CD check out my GitOps and Argo CD courses on Pluralsight here:

GitOps: The Big Picture“:

https://app.pluralsight.com/library/courses/gitops-the-big-picture

Getting Started with Argo CD“:

https://app.pluralsight.com/library/courses/argo-cd-getting-started

And here is the link to my Pluralsight profile to follow mehttps://app.pluralsight.com/profile/author/steve-buchanan

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GitOps Fundamentals Certification

Recently Codefresh launched the 1st certification in its GitOps certification path. This one is called “GitOps Fundamentals“. You can find it here: https://codefresh.learnworlds.com .

It takes you through the basics of GitOps to gain theoretical knowledge, and how to utilize Argo CD as the GitOps operator to gain hands-on knowledge. You will learn about both and will have questions on both in the quizzes and final exam.

They also touch on Argo Rollouts to go over Progressive Delivery with topics such as blue/green deployments and canary deployments. This is the 1st ever GitOps certification and it’s free! They do have plans for GitOps at Edge and GitOps at Scale certifications.

You can find more information about the GitOps certification and Codefresh’s future plans for it on this blog by Hannah Seligson (one of the authors of the course and exam) here: https://codefresh.io/blog/get-gitops-certified-argo.

I jumped all over this opportunity to get certified on GitOps, by signing up for the course, taking the training, and the exam! I passed and now I am GitOps certified.

Here is the certification:

GitOps is gaining adoption more and more every day in the Kubernetes space. Also, Argo CD is growing extremely fast as one of the top if not the top GitOps operator. I recommend you check this Codefresh GitOps certification out and get GitOps certified as this pattern and the technology behind it are growing at a super fast rate.

Also note, it looks like Weaveworks is planning to launch a “Certified GitOps Practitioner (CGP)” certification soon. I would guess the Weaveworks GitOps certification will contain content on Flux another GitOps operator. You can learn more about their coming GitOps certification here: https://www.weave.works/certified-gitops-practitioner

Also for more training on GitOps and Argo CD be sure to check out my GitOps and Argo CD courses on Pluralsight here:

GitOps: The Big Picture“:

https://app.pluralsight.com/library/courses/gitops-the-big-picture

Getting Started with Argo CD“:

https://app.pluralsight.com/library/courses/argo-cd-getting-started

And here is the link to my Pluralsight profile to follow me for future GitOps, Kubernetes, Cloud, and DevOps content: https://app.pluralsight.com/profile/author/steve-buchanan

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Guest on the 1st episode of Tech/Life Podcast

A former Microsoft MVP and friend Steve Beaumont started a podcast. I was honored to be a guest on his first episode! The episode was released today. This podcast explores balancing Tech and Life. On the podcast episodes, Steve talks with people within the technology field, discussing both tech and diving into personal lives, stress, learning, and interests.

Steve has a website for the podcast here: www.techvlife.com.

Steve and I had a chance to catch up at MMS 2022 for the episode. We talked about my transition to Microsoft working as a Principal Program Manager in Azure. We also talked about my time practicing Kung Fu, how I stay motivated, make goals, balance tech with hobbies, how tech is one of my hobbies, and balancing that so it does not become another job, Kubernetes, AKS, and more.

Steve already has episodes with many other great folks already. He will be releasing them in the coming weeks. So be sure to subscribe to his podcast. Here are some of the other guests he will have on:


Aria Carley
Justin Chalfant
Ben Whitmore
Mike Danoski
David Segura
Donna Ryan
Mike Marable

You can listen to the 1st episode with me right here:

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Watch Learn Live Episode 7 – Introduction to Azure Arc enabled Kubernetes

Today Pierre Roman (@wiredcanuck) Senior Cloud Advocate of Microsoft & myself (@buchatech) streamed “Introduction to Azure Arc enabled Kubernetes” on Learn Live. Here is what we covered in this session:

In this session, showed you how Azure Arc enabled Kubernetes clusters can help customers like Contoso to optimize and simplify their operations. Here are the Learning objectives we covered:

  • Describe Kubernetes, Azure Arc, and Azure Arc-enabled Kubernetes.
  • Connect Kubernetes clusters to Azure Arc.
  • Manage Azure Arc enabled Kubernetes clusters by using GitOps.
  • Integrate Azure Arc enabled Kubernetes cluster with Azure services like Azure Monitor and Azure Policy.

If you missed it don’t worry. 🙂 You can watch the playback on the Microsoft Developer YouTube channel here:

You can check out more Learn Live episodes on the:

Or

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Speaking at MMS 2022 in Person!

MMSMOA is back in person for 2022. I am excited to be heading back to present a session and be on some panels!

Here is the MMS website: https://mmsmoa.com

My session will be with my friend and co-author of my latest book John Joyner.

Here are the session details:

Azure Arc: Extending Hyperscale Cloud Management to Your Datacenter

Description:

Learn about Microsoft’s Azure Arc service, a new multi-cloud management platform that belongs in every cloud or DevOps estate. The premise of Azure Arc is compelling: why not extend familiar management tools proven in Azure to on-premise and other cloud networks? A practical scenario-based tour will get you up to speed quickly, with instruction and demos that are heavy with hands-on experience. If your organization has resources across the hybrid cloud, multi-cloud, and edge environments, then this session is for you. You will learn how to configure and use Azure Arc to uniformly manage workloads across all of these environments.

What you will learn:

  • Introduces the basics of hybrid, multi-cloud, and edge computing and how Azure Arc fits into that IT strategy
  • Insights into Azure native management tooling for managing on-premises servers and extending to other clouds
  • Detail an end-to-end hybrid server monitoring scenario leveraging Azure Monitor and/or Microsoft Sentinel that is seamlessly delivered by Azure Arc
  • Define a blueprint to achieve regulatory compliance with industry standards using Azure Arc, delivering Azure Policy from Microsoft Defender for Cloud

Session link to register here: mms2022atmoa.sched.com/event/yDOu/azure-arc-extending-hyperscale-cloud-management-to-your-datacenter

I will also be a part of these panels:

Cloud Adoption Roundtable

Are you thinking about starting the cloud journey, or are you an experienced cloud engineer already?  Come join this interactive session where we will talk all things cloud!  We will have a round-table discussion about what resources are available, where to find them, and which ones are better than others.  Talk with experienced cloud architects about the mistakes they’ve seen and how to avoid them.  Come listen to stories, enjoy a few drinks, and have a great time talking about the cloud movement.

What you will learn:

  • How to begin your cloud adoption journey
  • What resources are available to start your migration process, and how to find them
  • Common mistakes/pitfalls
  • Q&A with cloud adoption survivors

https://mms2022atmoa.sched.com/event/102rB/cloud-adoption-roundtable

Cloud AMA – Come ask the Cloud MVPs Anything

This session will be an open format Q&A. Come ask your burning questions in front of a live audience and get real-time feedback from cloud MVP’s and SME’s. No question too hard, no topic off-limits. Wanted to know why something was built the way it was? Want to know how to accomplish something you’ve been working on for months? Have a general question about Azure in general? Come, listen, ask.

https://mms2022atmoa.sched.com/event/zp1h/cloud-ama-come-ask-the-cloud-mvps-anything

Hope to see you at MMS 2022!

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Tech Talk with Kazeem – Azure Arc Enabled Kubernetes for Beginners

I was a guest on Tech Talk with Kazeem again! The topic of discussion was Azure Arc Enabled Kubernetes for Beginners.

This image has an empty alt attribute; its file name is TechTalk-w-Kazeem-2022-ArcK8s-2.pngThis image has an empty alt attribute; its file name is TechTalk-w-Kazeem-2022-ArcK8s-1.png
@KazeemCanTeach & @buchatech@buchatech Azure Arc K8s book with O’Reilly

In the discussion with me and Microsoft MVP Kazeem Adegboyega, we talked about Azure Stack, AKS, Azure Arc: K8s, and GitOps! We talked about each technology and when to use them for what purpose and more.

You can check it out here:

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Dok Talks #121 – Running Stateful Apps in Kubernetes Made Simple

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.

Register here:

https://www.meetup.com/Data-on-Kubernetes-community/events/284283907/

——-Update——-

If you missed the session you can stream it here:

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New Rancher Course Published for Multiple Kubernetes Management

My 14th course has been published on Pluralsight! This course is titled “Getting Started with Rancher” and can be found here: https://app.pluralsight.com/library/courses/rancher-getting-started

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 path titled “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

Again you can check out my new Rancher course here: https://app.pluralsight.com/library/courses/mulesoft4-big-picture

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! 

Here is the link to my Pluralsight profile to follow mehttps://app.pluralsight.com/profile/author/steve-buchanan

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Azure Arc Book Published

I am excited to kick off the new year announcing that my 8th book has been published! This book is “Azure Arc-Enabled Kubernetes and Servers“.

I had the honor to co-author this book with a long-time friend and fellow Microsoft MVP John Joyner. This is John’s latest book since his last 8 years ago!

The forward was written by Thomas Maurer a former MVP and now Microsoft Azure Evangelist. This book was reviewed by fellow Microsoft MVP Adnan Hendricks and a chapter contributed by a buddy of mine Fred Limmer.

This book covers an exciting technology from Microsoft exploring Azure Arc-Enabled Kubernetes and Servers. This book is for DevOps professionals, system administrators, security professionals, cloud admins, and IT professionals that are responsible for servers or Kubernetes clusters both on-premises and in the cloud.

Author copies!

This book covers:

  • Introduces the basics of hybrid, multi-cloud, and edge computing and how Azure Arc fits into that IT strategy
  • Teaches the fundamentals of Azure Resource Manager, setting the reader up with the knowledge needed on the technology that underpins Azure Arc
  • Offers insights into Azure native management tooling for managing on-premises servers and extending to other clouds
  • Details an end-to-end hybrid server monitoring scenario leveraging Azure Monitor and/or Azure Sentinel that is seamlessly delivered by Azure Arc
  • Defines a blueprint to achieve regulatory compliance with industry standards using Azure Arc, delivering Azure Policy from Azure Defender for Servers
  • Explores how Git and GitHub integrate with Azure Arc; delves into how GitOps is used with Azure Arc
  • Empowers your DevOps teams to perform tasks that typically fall under IT operations
  • Dives into how to best use Azure CLI with Azure Arc

You can order the book and watch for its official release here:

https://www.amazon.com/gp/product/1484277678

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Registering an Azure Kubernetes Service Cluster with Argo CD

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.

-For the process on your setup refer to the following link as it may differ:  https://kubernetes.io/docs/tasks/access-application-cluster/configure-access-multiple-clusters

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.

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