This segment showcases a live demonstration of a CI/CD pipeline triggered by a code change. The developer modifies the application's source code, which automatically triggers the pipeline's three stages: build, push, and update. The viewer observes the pipeline's progress in real-time, highlighting the seamless integration between code changes and automated deployment. This Azure DevOps tutorial (Episode 15, Part 2) demonstrates continuous delivery (CD) using a GitOps approach with Argo CD. A multi-microservice voting app is deployed to an AKS cluster. Changes trigger Azure pipelines, updating Kubernetes manifests, and Argo CD automatically deploys the updated images. The video covers configuration, troubleshooting (including image pull secrets), and explains the advantages of GitOps. This clip demonstrates the successful deployment of the updated image to the Kubernetes cluster using Argo CD. The viewer witnesses the Argo CD process updating the application, and the changes are immediately reflected in the live application, confirming the successful deployment.This segment provides a detailed explanation of the CI/CD components involved, including Azure Pipelines, Azure Container Registry (ACR), and Argo CD. The presenter walks through each stage, explaining how the updated image is pushed to ACR, the Kubernetes manifest is updated, and Argo CD deploys the new version to the Kubernetes cluster. The presenter then verifies the deployment by checking the Kubernetes pods. This segment begins with the presenter deleting the previous demo setup and then creating a new Kubernetes cluster using Azure Kubernetes Service (AKS). While the cluster is being created (a process that takes time), the presenter provides an overview of the continuous delivery process and the role of GitOps.This segment focuses on the detailed configuration of the AKS cluster, including resource group selection, region, node pools, and autoscaling. The presenter explains the importance of choosing appropriate resource settings and the implications of autoscaling on cost and security. The discussion highlights practical considerations for setting up a Kubernetes cluster for CI/CD.This segment delves into the specifics of AKS agent pools, explaining their role in running workloads and the benefits of autoscaling. The presenter discusses the importance of setting reasonable limits on autoscaling to mitigate potential security risks and cost overruns. The segment concludes with the AKS cluster creation process still underway, setting the stage for the next phase of the explanation. This segment highlights the core benefit of GitOps: continuous reconciliation. It explains how GitOps automatically detects and corrects any unauthorized changes made directly to the Kubernetes cluster, ensuring configuration consistency and preventing application disruptions caused by unintended modifications. The example of an incorrect image tag change illustrates the importance of this feature. This segment focuses on configuring Argo CD to connect with a Git repository. It explains the process of obtaining the Argo CD admin password, accessing the Argo CD UI, and preparing for the connection to the Azure Git repository. The steps are clearly explained and the importance of secure access is emphasized. This segment details the process of exposing the Argo CD user interface through a node port and configuring network access using Azure's Network Security Group. It provides a practical guide to making the Argo CD UI accessible from outside the Kubernetes cluster. This segment provides a concise tutorial on installing Argo CD using official documentation. It covers the installation commands and verifies the successful deployment of Argo CD pods, ensuring the environment is ready for further configuration. This segment outlines the initial steps for setting up Argo CD, a popular GitOps tool. It details the process of logging into the Kubernetes cluster, installing Argo CD, and preparing for the subsequent configuration steps. The clear, sequential instructions make it easy to follow along. This segment shows the integration of the shell script into an Azure DevOps pipeline. A new stage ("update") is added to the pipeline, responsible for executing the script and updating the deployment files with the new container image and tag. This illustrates a practical CI/CD implementation. The speaker clarifies the three command-line arguments used in the shell script: microservice identifier, repository name, and image tag. The discussion also touches upon security best practices for handling access tokens, suggesting the use of environment variables instead of directly storing them in the repository. This segment details a shell script designed for updating Kubernetes manifests. The speaker explains how the script is parameterized to handle multiple microservices, using command-line arguments for flexibility and reusability across different deployments. This demonstrates a practical approach to managing configuration files in a CI/CD pipeline. This segment demonstrates how to deploy applications using Argo CD. It shows how to create a new application, configure sync policies, and specify the repository path. The explanation of automatic synchronization and its implications for continuous delivery is particularly valuable. This segment explains how to connect Argo CD to a private Azure DevOps repository using a personal access token. It emphasizes the importance of appropriate permissions for the access token and provides a step-by-step guide to establishing a successful connection. This segment showcases a common issue in CI/CD pipelines: an incorrect image name. The speaker meticulously debugs the problem, highlighting the importance of verifying all pipeline components, from scripts to image registries. The detailed walkthrough of identifying the error in the image name within the deployment YAML file and correcting it in the shell script provides valuable insights into practical troubleshooting. This segment demonstrates the successful end-to-end CI/CD process, from code commit to deployment. The speaker showcases the integration of Argo CD, highlighting its role in automating deployments. The process of verifying the updated image in the cluster and resolving network port access issues provides a comprehensive understanding of real-world CI/CD challenges and their solutions. This segment focuses on the integration with Argo CD, a Kubernetes-based continuous delivery tool. The speaker explains how Argo CD monitors the repository for changes and automatically deploys updates. The demonstration shows the successful update of the container image to the latest version. This segment addresses a common challenge in Kubernetes deployments: pulling images from private registries. The speaker introduces the concept of "image pull secrets" and explains how to create and use them to grant Kubernetes access to private container registries, ensuring secure image deployments. The speaker demonstrates the execution of the Azure pipeline, highlighting the build, push, and update stages. An initial observation reveals a potential issue with the script's parameter passing, leading to an investigation of the script's logic and pipeline configuration.The speaker meticulously debugs the pipeline, identifying and correcting an error in how command-line arguments were passed to the shell script. The process showcases a systematic approach to troubleshooting CI/CD issues, emphasizing the importance of careful parameter handling.
