Controller Manager Pod Specification File Ownership Should Be root:root

#!/usr/bin/env bash
#
# Fix ownership of kube-controller-manager pod manifest to root:root
# Scope: run on every control plane node
# Idempotent: safe to run multiple times

set -euo pipefail

MANIFEST_PATH="/etc/kubernetes/manifests/kube-controller-manager.yaml"

echo "==> Checking for kube-controller-manager manifest at ${MANIFEST_PATH}"

if [ ! -e "${MANIFEST_PATH}" ]; then
  echo "Manifest file not found at ${MANIFEST_PATH}. Nothing to do on this node."
  exit 0
fi

current_owner_group="$(stat -c '%U:%G' "${MANIFEST_PATH}")"

echo "Current ownership: ${current_owner_group}"

if [ "${current_owner_group}" = "root:root" ]; then
  echo "Ownership already set to root:root. No change needed."
else
  echo "Setting ownership to root:root ..."
  chown root:root "${MANIFEST_PATH}"
fi

# Verification
echo "==> Verifying ownership after changes"
verified_owner_group="$(stat -c '%U:%G' "${MANIFEST_PATH}")"
echo "Verified ownership: ${verified_owner_group}"

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

echo "Ownership successfully set to root:root on ${MANIFEST_PATH}"