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Sync App - Cluster

Requirements

  1. Make sure you have a Kubernetes cluster running with ArgoCD installed
  2. Make sure you have an app deployed in the cluster and tracked by ArgoCD

Objectives

  1. Verify the app is tracked by ArgoCD and in sync
  2. . Make a change to your application by running a kubectl command. The change can anything:
    1. Changing the tag of the image
    2. Changing the number of replicas
    3. You can go extreme and delete the resource if you would like :)
  3. Check the app state in ArgoCD
  4. Sync the app state

Solution

UI

  1. Click on the app in the UI
    1. Make sure it's in sync and in "healthy" state
  2. Make a check in the cluster
    1. kubectl scale --replicas=0 <DEPLOYMENT_NAME>
    2. kubectl get rs <DEPLOYMENT_NAME>
  3. Go back to the UI and check the state of the app
    1. If it's still in sync, make sure to click on "Refresh"
    2. The app should be in "out-of-sync" state
    3. Click on "Sync" and then on "Synchronize"

CLI

# Check app state and verify it's in sync
argocd app get app-demo

# Run the following k8s commands (or any other commands that will change the state of your app)
kubectl scale --replicas=0 <DEPLOYMENT_NAME>
kubectl get rs <DEPLOYMENT_NAME>

# Check app state again
argocd app get app-demo

# Sync app state
argocd app sync app-demo
argocd app wait app-demo