> ## Documentation Index
> Fetch the complete documentation index at: https://cloudanix.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Scheduler Pod Specification File Ownership Should Be root:root

### More Info:

Verifies that the kube-scheduler pod manifest file is owned by root:root so only privileged users can modify it.

### Risk Level

Medium

### Address

Security

### Compliance Standards

* CIS Kubernetes

### Triage and Remediation

<Tabs>
  <Tab title="Remediation">
    ### Remediation

    <AccordionGroup>
      <Accordion title="Manual Steps" defaultOpen="true">
        1. On every control plane node, check the current ownership of the kube-scheduler manifest:
           ```sh theme={null}
           stat -c %U:%G /etc/kubernetes/manifests/kube-scheduler.yaml
           ```

        2. Still on the control plane node, set the file owner and group to root:root:
           ```sh theme={null}
           chown root:root /etc/kubernetes/manifests/kube-scheduler.yaml
           ```

        3. (Optional) Tighten permissions if needed so only root can modify the file:
           ```sh theme={null}
           chmod 600 /etc/kubernetes/manifests/kube-scheduler.yaml
           ```

        4. Verify the ownership is now root:root on the control plane node:
           ```sh theme={null}
           stat -c %U:%G /etc/kubernetes/manifests/kube-scheduler.yaml
           ```
      </Accordion>

      <Accordion title="Using kubectl">
        kubectl cannot change file ownership on control plane nodes, so it cannot be used to fix `/etc/kubernetes/manifests/kube-scheduler.yaml`. This must be corrected directly on each control plane node’s filesystem; see the Manual Steps section for how to do that.
      </Accordion>

      <Accordion title="Automation">
        ```bash theme={null}
        #!/usr/bin/env bash
        #
        # Remediation for:
        # CISKubernetes 1.1.6 - Ensure kube-scheduler pod specification file ownership is set to root:root
        #
        # Target: every control plane node
        # Usage:
        #   - Run directly on each control plane node as root, OR
        #   - From an admin machine with SSH access and key-based auth:
        #       ./fix-kube_scheduler_ownership.sh node1 node2 ...
        #     (requires passwordless sudo/root on targets)

        set -euo pipefail

        SCHEDULER_MANIFEST="/etc/kubernetes/manifests/kube-scheduler.yaml"

        fix_local_node() {
          echo "==> Checking local node: $(hostname -f || hostname)"

          if [ ! -e "$SCHEDULER_MANIFEST" ]; then
            echo "    [WARN] $SCHEDULER_MANIFEST does not exist on this node. Skipping."
            return 0
          fi

          current_owner="$(stat -c '%U:%G' "$SCHEDULER_MANIFEST")" || {
            echo "    [ERROR] Failed to stat $SCHEDULER_MANIFEST"
            return 1
          }

          if [ "$current_owner" = "root:root" ]; then
            echo "    [OK] Ownership already root:root ($current_owner)"
          else
            echo "    [INFO] Current ownership: $current_owner. Changing to root:root..."
            chown root:root "$SCHEDULER_MANIFEST"
          fi

          # Verification
          verify_owner="$(stat -c '%U:%G' "$SCHEDULER_MANIFEST")"
          if [ "$verify_owner" != "root:root" ]; then
            echo "    [ERROR] Verification failed. Ownership is $verify_owner, expected root:root"
            return 1
          fi

          echo "    [OK] Verified $SCHEDULER_MANIFEST ownership is root:root"
        }

        fix_remote_node() {
          local node="$1"

          echo "==> Connecting to control plane node: $node"

          ssh "$node" /bin/bash -s << 'EOF'
        set -euo pipefail
        SCHEDULER_MANIFEST="/etc/kubernetes/manifests/kube-scheduler.yaml"

        echo "    Node: $(hostname -f || hostname)"

        if [ ! -e "$SCHEDULER_MANIFEST" ]; then
          echo "    [WARN] $SCHEDULER_MANIFEST does not exist on this node. Skipping."
          exit 0
        fi

        current_owner="$(stat -c '%U:%G' "$SCHEDULER_MANIFEST")" || {
          echo "    [ERROR] Failed to stat $SCHEDULER_MANIFEST"
          exit 1
        }

        if [ "$current_owner" = "root:root" ]; then
          echo "    [OK] Ownership already root:root ($current_owner)"
        else
          echo "    [INFO] Current ownership: $current_owner. Changing to root:root..."
          chown root:root "$SCHEDULER_MANIFEST"
        fi

        verify_owner="$(stat -c '%U:%G' "$SCHEDULER_MANIFEST")"
        if [ "$verify_owner" != "root:root" ]; then
          echo "    [ERROR] Verification failed. Ownership is $verify_owner, expected root:root"
          exit 1
        fi

        echo "    [OK] Verified $SCHEDULER_MANIFEST ownership is root:root"
        EOF
        }

        main() {
          if [ "$#" -eq 0 ]; then
            # Run locally on this control plane node
            fix_local_node
          else
            # Run via SSH on each specified control plane node
            for node in "$@"; do
              fix_remote_node "$node"
            done
          fi
        }

        main "$@"
        ```
      </Accordion>
    </AccordionGroup>
  </Tab>
</Tabs>