Example GitOps deployments using Flux.

Deployed Kubernetes cluster contains:

1. GitOps

   • Flux CD continuous and progressive delivery solution for Kubernetes

2. Infrastructure

   • Linkerd service mesh

   • MetalLB bare-metal load balancer

   • NGinx Ingress Controller

   • Bitnami Sealed Secrets

   • Kyverno policy management and enforcement

3. Observability

   • Monitoring stack using Grafana and Prometheus

   • Kubernetes Metrics Server

   • Linkerd Viz service mesh and Grafana dashboards

   • Log monitoring and alerting using Loki

4. Tools

   • LitmusChaos open source Chaos Engineering platform

   • Trivy-Operator Automated vulnerability scanning for Kubernetes workloads. image scanning and resource misconfiguration discovery

5. Applications

   • Podinfo sample microservice application

Shell scripts are provided to create a Kubernetes cluster using Kind and populate it with infrastructure, tools and a sample application from a GitHub repo.

Run the installation script enter the following command:

./install.sh

The installation script will create and test a multi-node cluster running in Docker containers.

To force Flux to run reconcile the manifests held in the Git repository to the cluster run:

flux reconcile kustomization flux-system --with-source

To view Flux resources use:

flux get all

View the Flux Kustomization dependency tree with:

flux tree kustomization flux-system --compact

Flux manifests are used to deploy and maintain cluster resources.

Manifests within the ./k8s/cluster/ folder are used to bootstrap the cluster.

The ./k8s/infrastructure/source/finalizers folder contains a finalizers Kustomization that is used to ensure all infrastructure resources are deployed before synchronizing application or tool manifests.