Example Voting (Instavote) App

Architecture

• A Python webapp which lets you vote between two options
• A Redis queue which collects new votes
• A .NET worker which consumes votes and stores them in…
• A Postgres database backed by a Docker volume
• A Node.js webapp which shows the results of the voting in real time

Description

Note

The voting application only accepts one vote per client. It does not register votes if a vote has already been submitted from a client.

Tools

• kubectx/kubens

Instal via hombebrew

brew install kubectx

Contents

• Deliver Kubernetes with Flux
  • Install Flux CLI
  • Bootstrap
  • Verify Controllers
  • Create Source Controller
  • Kustomize Controller
  • Exporting Sync Manifests
  • Adding Health Checks
  • Garbage Collection
  • Defining Sequencing with DependsOn
  • Verifying The Application
• Kustomize
  • Bootstrapping The Staging Cluster
  • Reorganizing Code with Kustomize Overlays
  • Deploying to Dev with Custom Configurations
  • Creating Staging Overlays
  • Kustomizing Service Configurations
  • Restructuring and Deploying Redis with Kustomize
  • Updating Scale by Setting Replica Counts
  • Images and Namespaces
  • Setting Common Labels and Annotations
  • Generating ConfigMaps
  • Automating Rollouts on Configuration Changes
  • Generate Worker Deployment
• Deploy Helm Charts with Flux
  • Defining a Helm Repository as a Source
  • Deploying with HelmRelease
  • Deploying Vote Result with ChartSource
  • HelmRelease with Git Repository
  • Features of a Notification Controller
• Monitoring and Alerting
  • Features of a Notification Controller
  • Slack Notifications
  • Auto Updating Git Commit Status
  • Monitoring with Prometheus & Grafana
• Multi-Tenancy with Flux
  • The Need for Multi Tenancy
  • Exporting Sync Manifests
  • Clean Up Staging Cluster
  • Bootstrapping Flux Fleet
  • Initializing the Instavote Deploy Repository
  • Migrating the Deployment Code
  • Preparing the Project for Onboarding
• Release Strategies with Flagger
  • Installing Flagger
  • Deploying the Nginx Ingress Controller
  • Defining the Ingress Rule for Vote
  • Changing Flux Code to Work with Flagger
  • Enable Flagger Deployment
  • Triggering Blue/Green Deployment