#0000 - Add Longhorn installation script and Helm values file

Introduce a bash script (`05_install_longhorn.sh`) to automate the installation of Longhorn using Helm, including S3 backup credentials setup. Include a new Helm values file (`longhorn.yaml`) to define default settings like replica count and S3 backup configuration.

helm-values/longhorn.yaml

@@ -0,0 +1,12 @@
+defaultSettings:
+  defaultReplicaCount: 2
+  storageReservedPercentageForDefaultDisk: 1
+  backupTarget: s3://longhorn-talos-backup@eu-west-1/
+  backupTargetCredentialSecret: longhorn-s3-secret
+
+persistence:
+  defaultClassReplicaCount: 2
+
+global:
+  nodeSelector:
+    extensions.talos.dev/iscsi-tools: v0.1.6

scripts/05_install_longhorn.sh

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+#!/bin/bash
+
+set -e
+
+# Check if the Cloudflare API token is provided as an argument
+if [ -z "$1" ]; then
+  echo "Error: Missing S3 access key ID."
+  echo "Usage: $0 <AWS_ACCESS_KEY_ID> <AWS_SECRET_ACCESS_KEY>"
+  echo "You must provide your access key ID as a parameter to run this script."
+  exit 1
+fi
+
+# Check if the Cloudflare API token is provided as an argument
+if [ -z "$2" ]; then
+  echo "Error: Missing S3 secret access key ID."
+  echo "Usage: $0 <AWS_ACCESS_KEY_ID> <AWS_SECRET_ACCESS_KEY>"
+  echo "You must provide your secret access key ID as a parameter to run this script."
+  exit 1
+fi
+
+AWS_ACCESS_KEY_ID=$1
+AWS_SECRET_ACCESS_KEY=$2
+
+# Add the longhorn Helm repository
+helm repo add longhorn https://charts.longhorn.io
+helm repo update
+
+# Create the namespace for longhorn
+kubectl create namespace longhorn-system || true
+kubectl label namespace longhorn-system pod-security.kubernetes.io/enforce=privileged
+kubectl label namespace longhorn-system pod-security.kubernetes.io/audit=privileged
+kubectl label namespace longhorn-system pod-security.kubernetes.io/warn=privileged
+
+kubectl delete secret longhorn-s3-secret -n longhorn-system || true
+kubectl create secret generic longhorn-s3-secret \
+  --namespace longhorn-system \
+  --from-literal=AWS_ACCESS_KEY_ID=$AWS_ACCESS_KEY_ID \
+  --from-literal=AWS_SECRET_ACCESS_KEY=$AWS_SECRET_ACCESS_KEY \
+  --from-literal=AWS_REGION=eu-west-1
+
+# Install the longhorn chart
+helm install longhorn longhorn/longhorn \
+  --namespace longhorn-system \
+  --version 1.7.2 \
+  -f ./helm-values/longhorn.yaml
+