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+# 🖥️ Bare-Metal HYpervisor Preparation
+
+This document outlines the system configuration, storage layout, and virtualization software stack initialized on the physical server host (`hypervisor.lab.local` - `172.30.1.200`).
+
+---
+
+## 🏗️ Hypervisor Virtualization Stack
+
+The hypervisor runs bare-metal **AlmaLinux 10** with hardware-assisted virtualization enabled. The software architecture is structured as follows:
+
+```mermaid
+graph TD
+    %% My Color Palette
+    classDef uiNode fill:#212c2a,stroke:#9580ff,color:#f8f8f2,stroke-width:2px;
+    classDef libNode fill:#2b3b38,stroke:#70a99f,color:#f8f8f2,stroke-width:1.5px;
+    classDef hwNode fill:#151d1c,stroke:#415854,color:#f8f8f2,stroke-width:2px;
+
+    subgraph Admin ["Management Interfaces"]
+        Cockpit["🌐 Cockpit Web UI (Port 9090)"]:::uiNode
+        Virsh["💻 virsh CLI / SSH"]:::uiNode
+    end
+
+    subgraph LibvirtStack ["Virtualization Plane"]
+        Libvirtd["⚙️ libvirtd Daemon"]:::libNode
+        QemuKVM["🛡️ QEMU / KVM Kernel Modules"]:::libNode
+    end
+
+    subgraph Hardware ["Physical Host Resources"]
+        CPU["🖥️ AMD Ryzen 7 6800H (8C/16T)"]:::hwNode
+        RAM["💾 32GB DDR5 RAM"]:::hwNode
+        Storage["💿 1TB NVMe (Thin-provisioned LVM)"]:::hwNode
+    end
+
+    Cockpit & Virsh ===>|Controls API| Libvirtd
+    Libvirtd ===>|Manages VM CPU/RAM schedulers| QemuKVM
+    QemuKVM ===>|Exposes hardware execution| CPU & RAM & Storage
+
+    %% Subgraph Colors
+    style Admin fill:#161d1c,stroke:#9580ff,stroke-width:1px;
+    style LibvirtStack fill:#161d1c,stroke:#70a99f,stroke-width:1px;
+    style Hardware fill:#161d1c,stroke:#415854,stroke-width:1px;
+```
+
+---
+
+## 📦 Software Stack Specifications
+
+The automation is defined in `ansible/playbooks/02_kvm_setup.yml` and installs:
+
+*   `qemu-kvm`: The backend machine emulator that provides hardware-assisted virtualization.
+*   `libvirt`: The daemon library that provides a stable virtualization management API.
+*   `virt-install`: A command-line utility used to instantiate new virtual guests.
+*   `cockpit` & `cockpit-machine`: A lightweight web interface (listening on port `9090`) to monitor host CPU, RAM, and manage virtual machines.
+
+---
+
+## 🛠️ Execution & Initialization Tasks
+
+The Ansible playbook executes threee key system preparation tasks:
+
+### 1.  Repository Setup & Utilities (`01_host_prep.yml`)
+
+*   Enables the **EPEL(Extra Packages for Enterprise Linux)** repository.
+*   Installs utility tools: `htop`, `tmux`, `git`, and `curl`.
+*   Configures the system timezone to `Asia/Seoul`.
+
+### 2.  User Permission Configuration
+
+*   Adds the administrative user `sho` to the `libvirt` group:
+
+```yaml
+ansible.builtin.user:
+    name: ""{{ admin_user }}
+    groups: libvirt
+    append: true
+```
+
+*This allows running KVM administrative commands (`virsh`) without executing `sudo`.
+
+### 3.  Systemd Services Integration
+
+*   Starts and enables:
+    *   `libvirtd`: The virtualization controller.
+    *   `cockpit.socket`: The web administration server socket.
+
+---
+
+## 🌐 Network Bridge Configuration
+
+For the virtual machines to be fully visible on the local subnet(`172.30.1.0/24`), a network bridge named `br0` must be configured on the host network adapter.
+
+Verify the status of the network bridge on the hypervisor using `nmcli`:
+
+```bash
+# View active bridge and interface mappings
+nmcli device status
+```
+
+*Ensure `br0` is active and binding the physical Ethernet adapter.*