#!/usr/bin/env bash
# CKS mock — cluster bootstrap. Run on your Ubuntu VM (needs docker, kind >= v0.32.0, kubectl v1.35, helm).
# CNI is Cilium (kube-proxy replacement, no kindnet, no kube-proxy) — see kind-config.yaml's networking: block.
set -euo pipefail

HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
cd "$HERE"

# ---- pinned versions ----
CILIUM_VERSION="1.20.0"
INGRESS_NGINX_REF="controller-v1.15.1"

mkdir -p exam-files

echo "[*] Creating kind cluster 'cks' (1 cp + 2 workers, k8s v1.35.5)..."
# No --wait here: with disableDefaultCNI, nodes are legitimately NotReady (and CoreDNS Pending)
# until Cilium is installed below — waiting now would just time out.
kind create cluster --config kind-config.yaml
kubectl config use-context kind-cks

echo "[*] Installing Cilium v${CILIUM_VERSION} (CNI + kube-proxy replacement)..."
CP_IP="$(docker inspect -f '{{.NetworkSettings.Networks.kind.IPAddress}}' cks-control-plane)"
helm repo add cilium https://helm.cilium.io/ >/dev/null
helm repo update cilium >/dev/null
helm upgrade --install cilium cilium/cilium \
  --version "$CILIUM_VERSION" --namespace kube-system \
  --set ipam.mode=kubernetes \
  --set kubeProxyReplacement=true \
  --set k8sServiceHost="$CP_IP" --set k8sServicePort=6443 \
  --set operator.replicas=1 \
  --set image.pullPolicy=IfNotPresent \
  --wait --timeout=5m

echo "[*] Waiting for Cilium and nodes to be Ready..."
kubectl -n kube-system rollout status ds/cilium --timeout=300s
kubectl wait --for=condition=Ready nodes --all --timeout=300s
command -v cilium >/dev/null 2>&1 && cilium status --wait || true

echo "[*] Installing an ingress controller (needed for the TLS task)..."
kubectl label node cks-control-plane ingress-ready=true --overwrite
kubectl apply -f "https://raw.githubusercontent.com/kubernetes/ingress-nginx/${INGRESS_NGINX_REF}/deploy/static/provider/kind/deploy.yaml"
kubectl -n ingress-nginx rollout status deploy/ingress-nginx-controller --timeout=300s

cat <<'EOF'

[*] Cluster up. Sanity check:
    kubectl get nodes -o wide
    cilium status
    kubectl -n kube-system get ds kube-proxy   # expected: not found — Cilium replaces it

[*] Host-side tooling you want on the VM (install latest):
    - kube-bench   : https://github.com/aquasecurity/kube-bench/releases  (or run as a Job in-cluster)
    - trivy        : https://github.com/aquasecurity/trivy   (apt: aquasecurity repo)
    - kubesec      : https://github.com/controlplaneio/kubesec/releases
    - falco        : apt install falco   (v0.44.1) — used in the runtime task on the VM
    - helm         : for Kyverno / Falco chart installs / Cilium (already used above)
    - cilium-cli   : optional, https://github.com/cilium/cilium-cli/releases — `cilium status`/`cilium connectivity test`
    - cosign       : optional, image signing task

[*] Now run ./seed.sh to plant the vulnerable/target objects for the kubectl-only tasks.
EOF