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BlogMobile App DevelopmentArgoCD: Driving GitOps to the Next Level

ArgoCD: Driving GitOps to the Next Level

Why use ArgoCD ?

  • When an application is modified, a developer pushes an updated version of the Kubernetes resource definitions to a Git repository.
  • A fresh container image is saved to a registry as a result of the continuous integration being initiated. 
  • By submitting a pull request, a developer modifies Kubernetes manifests, which can be generated automatically or manually.
  • After reviewing the pull request, the modifications are incorporated into the main branch. This sets off a webhook that notifies Argo CD of the modification.
  • After cloning the repository, Argo CD contrasts the application state with the Kubernetes cluster’s current state. It modifies the cluster configuration as needed.
  • Until the desired configuration is reached, Kubernetes uses its controllers to balance the necessary adjustments to cluster resources.
  • Argo CD keeps track of developments and notifies users when the application is synchronized with the Kubernetes cluster.
  • ArgoCD also operates in the opposite direction, keeping an eye on modifications to the Kubernetes cluster and removing them if they don’t align with the Git configuration as it is.
  • GitOps agent—Argo CD is in charge of releasing updated code straight to Kubernetes resources after retrieving it from Git repositories. In a single system, it controls both application updates and infrastructure configuration.
  • Custom Resource Definitions (CRD)—Argo CD runs inside a Kubernetes cluster in its own namespace. It offers its own CRDs that add functionality to the Kubernetes API and enable declarative definition of the intended application state. Argo CD uses its CRDs to apply the modifications inside its designated namespace in accordance with the guidelines found in a Helm or Git repository.
  • CLI—With just a few easy commands, one can build YAML resource definitions using Argo CD’s robust CLI. For example, the Argo CD app create command eliminates the requirement for manual YAML writing by allowing you to define a proper Application object that specifies your application and set a few options.
  • User Interface—  The distinctive feature of Argo CD is its easy-to-use web-based user interface, which enables you to describe an application and request that Argo CD generate the necessary YAML configurations.

Getting Started with ArgoCD installation :

  • Prometheus Metrics.
  • Deploying  applications to specified target environments without human intervention.
  • Ability of managing and deploying to multiple clusters.
  • Analyzing health status of application resources.
  •  Provides CLI for automation and CI integration.
  • Provides access tokens for automation.
  • API calls and application events have audit trails.

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