Ensure Controller Manager Configuration File Ownership Is Root

#!/usr/bin/env bash
#
# Fix ownership of /etc/kubernetes/controller-manager.conf to root:root
# Scope: run on every control plane node (with sudo/root privileges)
# Safe to re-run (idempotent).

set -euo pipefail

TARGET_FILE="/etc/kubernetes/controller-manager.conf"
DESIRED_OWNER="root"
DESIRED_GROUP="root"

echo "=== CIS 1.1.18: Ensure ${TARGET_FILE} ownership is ${DESIRED_OWNER}:${DESIRED_GROUP} ==="

if [ ! -e "${TARGET_FILE}" ]; then
  echo "INFO: ${TARGET_FILE} does not exist on this node. Nothing to change."
  exit 0
fi

current_owner="$(stat -c '%U' "${TARGET_FILE}")"
current_group="$(stat -c '%G' "${TARGET_FILE}")"

echo "Current ownership: ${current_owner}:${current_group}"

if [ "${current_owner}" = "${DESIRED_OWNER}" ] && [ "${current_group}" = "${DESIRED_GROUP}" ]; then
  echo "INFO: Ownership already set to ${DESIRED_OWNER}:${DESIRED_GROUP}. No change needed."
else
  echo "Updating ownership to ${DESIRED_OWNER}:${DESIRED_GROUP} ..."
  chown "${DESIRED_OWNER}:${DESIRED_GROUP}" "${TARGET_FILE}"
fi

echo "Verifying ownership..."
verified_owner_group="$(stat -c '%U:%G' "${TARGET_FILE}")"
echo "stat -c %U:%G ${TARGET_FILE} => ${verified_owner_group}"

if [ "${verified_owner_group}" != "${DESIRED_OWNER}:${DESIRED_GROUP}" ]; then
  echo "ERROR: Failed to set ownership on ${TARGET_FILE} to ${DESIRED_OWNER}:${DESIRED_GROUP}" >&2
  exit 1
fi

echo "SUCCESS: ${TARGET_FILE} ownership is correctly set to ${DESIRED_OWNER}:${DESIRED_GROUP}."

sudo bash ./fix-controller-manager-conf-ownership.sh