Deploy Podinfo - Helm

Podinfo is a microservice to demonstrate best practices of running a microservice in a Kubernetes cluster. In this chapter Podinfo is used a deployment unit and deployed with FluxV2 kustomization controller.

Prerequisites

  • FluxV2 installed in a Kubernetes cluster
  • A septate configuration git repository, the repository from the installation section is sufficient

Adding Git repository as flux source

First, the flux configuration repository must be cloned to the local computer.

git clone git@github.com:zonedbit/flux-conf-playground.git

git checkout flux-conf

cd flux-conf-playground

In the next step a CRD is created, this is a representing the helm repository which should be deployed to Kubernetes cluster.

flux create source helm podinfo \
--namespace=default \
--url=https://stefanprodan.github.io/podinfo \
--interval=10m \
--export > ./clusters/green/podinfo-source-helm.yaml

After running this command a CRD is created, and can be pushed to the git repository.

git add -A && git commit -m "Add podinfo HelmRepository"
git push

A moment later the helm repository should appear as a new CRD and pointing to the HELM repository of Podinfo

flux get sources helm -A

NAMESPACE NAME    READY MESSAGE                                                     REVISION                                  SUSPENDED
default   podinfo True  Fetched revision: 8411f23d07d3701f0e96e7d9e503b7936d7e1d56  8411f23d07d3701f0e96e7d9e503b7936d7e1d56  False

Deploy Podinfo via Helm

In the first step a simple value yaml is create to configure the helm chart.

cat > ./clusters/green/podinfo-values.yaml <<EOL
replicaCount: 4
resources:
  limits:
    memory: 256Mi
  requests:
    cpu: 100m
    memory: 64Mi
EOL

Now the Podinfo microservie will be deployed to the Kubernetes cluster. Therefor the flux cli is used to create a helmrelease CRD. Pushing the Podinfo helmrelease CRD to the git repository, leads to the deployment of the Podinfo microservice.

flux create helmrelease podinfo \
--namespace=default \
--source=HelmRepository/podinfo \
--release-name=podinfo \
--chart=podinfo \
--chart-version=">5.0.0" \
--values=./clusters/green/podinfo-values.yaml \
--export > ./clusters/green/podinfo-helmrelease.yaml

git add -A && git commit -m "Add podinfo helmrelease"
git push

By creating a port-forward it is possible to access Podinfo in a Browser via http://127.0.0.1:8080

kubectl port-forward service/podinfo 8080:9898

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