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architectSAP
Active Contributor
Previously, I described how to Prepare your SAP Data Intelligence installation with Rancher. Based on this I have been wondering whether Gardener could add to the equation. Therefore, I install it on Rancher in 5 steps along the Install Gardener on your Kubernetes Landscape guide:

  1. Load Balancer

  2. Vertical Pod Autoscaler

  3. DNS Provider

  4. Ceph CSI

  5. Gardener


Load Balancer


I leverage MetalLB on premise which is easy enough to install choosing the Helm option.

Helm


curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3
chmod 700 get_helm.sh
./get_helm.sh

MetalLB


helm repo add metallb https://metallb.github.io/metallb
helm install metallb metallb/metallb -f values.yaml

Example values.yaml


configInline:
address-pools:
- name: default
protocol: layer2
addresses:
- 192.168.2.128/32

Vertical Pod Autoscaler


Gardener requires a Vertical Pod Autoscaler that does not come with Rancher but is not difficult to install.
git clone https://github.com/kubernetes/autoscaler.git
cd autoscaler/vertical-pod-autoscaler/
./hack/vpa-up.sh

DNS Provider


Gardener requires External DNS Management for the DNS controller manager artefact. I chose Clouflare DNS service.

DNS controller manager


git clone https://github.com/gardener/external-dns-management.git
cd external-dns-management
helm install charts/external-dns-management --generate-name --namespace=default --set configuration.identifier=garden

Secret


apiVersion: v1
kind: Secret
metadata:
name: cloudflare-credentials
namespace: default
type: Opaque
data:
CLOUDFLARE_API_TOKEN: <Your Cloudflare API token>

DNSProvider


apiVersion: dns.gardener.cloud/v1alpha1
kind: DNSProvider
metadata:
name: cloudflare
namespace: default
spec:
type: cloudflare-dns
secretRef:
name: cloudflare-credentials
domains:
include:
# this must be replaced with a (sub)domain of the hosted zone
- <Your domain>

Ceph CSI


Gardener requires persistent storage so I Provision Volumes on Kubernetes and Nomad using Ceph CSI by Kidong Lee.

Gardener


Given the above, installing Gardener is straight forward.
git clone https://github.com/gardener/sow
cd sow
export PATH=$PATH:$PWD/docker/bin
cd ..
mkdir landscape
cd landscape
cp ~/.kube/config kubeconfig
git clone "https://github.com/gardener/garden-setup" crop
sow order -A
sow deploy -A
sow url

As a result, Gardener is running.


Ready to log into my Gardener Dashboard.


In an upcoming blog I will try to prepare a SAP Data Intelligence installation on Gardener.
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