Update README.md and CLUSTER-BUILD.md to enhance documentation for Vault Kubernetes auth and ClusterSecretStore integration. Add one-shot configuration instructions for Kubernetes auth in README.md, and update CLUSTER-BUILD.md to reflect the current state of the Talos cluster, including new components like Headlamp and Renovate, along with their deployment details and next steps.

clusters/noble/apps/vault/configure-kubernetes-auth.sh

@@ -0,0 +1,77 @@
+#!/usr/bin/env bash
+# Configure Vault Kubernetes auth + KV v2 + policy/role for External Secrets Operator.
+# Requires: kubectl (cluster access), jq optional (openid issuer); Vault reachable via sts/vault.
+#
+# Usage (from repo root):
+#   export KUBECONFIG=talos/kubeconfig   # or your path
+#   export VAULT_TOKEN='…'               # root or admin token — never commit
+#   ./clusters/noble/apps/vault/configure-kubernetes-auth.sh
+#
+# Then: kubectl apply -f clusters/noble/apps/external-secrets/examples/vault-cluster-secret-store.yaml
+# Verify: kubectl describe clustersecretstore vault
+
+set -euo pipefail
+
+: "${VAULT_TOKEN:?Set VAULT_TOKEN to your Vault root or admin token}"
+
+ISSUER=$(kubectl get --raw /.well-known/openid-configuration | jq -r .issuer)
+REVIEWER=$(kubectl -n vault create token vault --duration=8760h)
+CA_B64=$(kubectl config view --raw --minify -o jsonpath='{.clusters[0].cluster.certificate-authority-data}')
+
+kubectl -n vault exec -i sts/vault -- env \
+  VAULT_ADDR=http://127.0.0.1:8200 \
+  VAULT_TOKEN="$VAULT_TOKEN" \
+  sh -ec '
+    set -e
+    vault auth list >/tmp/vauth.txt
+    grep -q "^kubernetes/" /tmp/vauth.txt || vault auth enable kubernetes
+  '
+
+kubectl -n vault exec -i sts/vault -- env \
+  VAULT_ADDR=http://127.0.0.1:8200 \
+  VAULT_TOKEN="$VAULT_TOKEN" \
+  CA_B64="$CA_B64" \
+  REVIEWER="$REVIEWER" \
+  ISSUER="$ISSUER" \
+  sh -ec '
+    echo "$CA_B64" | base64 -d > /tmp/k8s-ca.crt
+    vault write auth/kubernetes/config \
+      kubernetes_host="https://kubernetes.default.svc:443" \
+      kubernetes_ca_cert=@/tmp/k8s-ca.crt \
+      token_reviewer_jwt="$REVIEWER" \
+      issuer="$ISSUER"
+  '
+
+kubectl -n vault exec -i sts/vault -- env \
+  VAULT_ADDR=http://127.0.0.1:8200 \
+  VAULT_TOKEN="$VAULT_TOKEN" \
+  sh -ec '
+    set -e
+    vault secrets list >/tmp/vsec.txt
+    grep -q "^secret/" /tmp/vsec.txt || vault secrets enable -path=secret kv-v2
+  '
+
+kubectl -n vault exec -i sts/vault -- env \
+  VAULT_ADDR=http://127.0.0.1:8200 \
+  VAULT_TOKEN="$VAULT_TOKEN" \
+  sh -ec '
+    vault policy write external-secrets - <<EOF
+path "secret/data/*" {
+  capabilities = ["read", "list"]
+}
+path "secret/metadata/*" {
+  capabilities = ["read", "list"]
+}
+EOF
+    vault write auth/kubernetes/role/external-secrets \
+      bound_service_account_names=external-secrets \
+      bound_service_account_namespaces=external-secrets \
+      policies=external-secrets \
+      ttl=24h
+  '
+
+echo "Done. Issuer used: $ISSUER"
+echo ""
+echo "Next (each command on its own line — do not paste # comments after kubectl):"
+echo "  kubectl apply -f clusters/noble/apps/external-secrets/examples/vault-cluster-secret-store.yaml"
+echo "  kubectl get clustersecretstore vault"