serveral changes to improve legibility

README.md

@@ -5,11 +5,33 @@ Use cloud images on baremetal using libvirt/kvm
 - openssh
 - mkpass (whois)
 - arp
+
 ## Links
 - [https://blog.programster.org/create-debian-12-kvm-guest-from-cloud-image](https://blog.programster.org/create-debian-12-kvm-guest-from-cloud-image)
 - [https://earlruby.org/2023/02/quickly-create-guest-vms-using-virsh-cloud-image-files-and-cloud-init/](https://earlruby.org/2023/02/quickly-create-guest-vms-using-virsh-cloud-image-files-and-cloud-init/)
 - [https://sumit-ghosh.com/posts/create-vm-using-libvirt-cloud-images-cloud-init/)](https://sumit-ghosh.com/posts/create-vm-using-libvirt-cloud-images-cloud-init/)
 
+## Preparing host
+
+### Create bridge network
+
+```shell
+sudo virsh --connect qemu:///session net-define /dev/stdin << EOF
+<network>
+  <name>bridged-network</name>
+  <forward mode='bridge'/>
+  <bridge name='brbackend' />
+</network>
+EOF
+```
+
+#### AppArmor exception
+
+```shell
+ln -s /etc/apparmor.d/usr.sbin.libvirtd /etc/apparmor.d/disable/
+apparmor_parser -R /etc/apparmor.d/usr.sbin.libvirtd
+```
+
 ## Creating VMs
 ### Usage
 ```shell

base_scripts/vim_functions.sh

@@ -0,0 +1,112 @@
+#!/bin/env bash
+
+# Variables
+VM_USER="user"
+VM_BASE_DIR=${VM_BASE_DIR:-"${HOME}/vms"}
+VM_IMAGE_PATH="${VM_BASE_DIR}/images/$1.img"
+CI_IMAGE_PATH="${VM_BASE_DIR}/images/$1-cidata.iso"
+
+# Functions
+## List Installed VMS
+vm_list()
+{
+    virsh list
+}
+
+vm_net_get_mac()
+{
+    local VM=$1
+    MAC_VM=$(virsh domiflist "$VM" | awk '{ print $5 }' | tail -2 | head -1)
+    echo $MAC_VM
+}
+## Get VM ip (only on NAT)
+vm_net_get_ip()
+{
+    local VM="$1"
+    # Obtener la dirección MAC de la interfaz de red
+    MAC_VM=$(vm_net_get_mac $VM)
+    if [[ -z "$MAC_VM" ]]; then
+        echo "Error: No se pudo encontrar la dirección MAC para '$VM'"
+        return 1
+    fi
+    # Obtener la dirección IP a partir de la dirección MAC
+    VM_IP_ADDRESS=$(arp -a | grep "$MAC_VM" | awk '{ print $2 }' | sed 's/[()]//g')
+    if [[ -z "$VM_IP_ADDRESS" ]]; then
+        echo "Error: No se pudo encontrar la dirección IP para la dirección MAC '$MAC_VM'"
+        return 1
+    fi
+    echo "$VM_IP_ADDRESS"
+}
+
+vm_net_create_netplan()
+{
+    local VM=$1
+    local MAV_VM=$2
+cat <<EOF > "$VM_BASE_DIR/init/${VM}-netplan"
+# This file is generated from information provided by the datasource.  Changes
+# to it will not persist across an instance reboot.  To disable cloud-init's
+# network configuration capabilities, write a file
+# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
+# network: {config: disabled}
+network:
+    ethernets:
+        enp1s0:
+            addresses:
+              - ${IP}/24
+            nameservers:
+              addresses:
+                - 208.67.222.222
+                - 208.67.220.220
+            match:
+                macaddress: ${MAC_VM}
+            set-name: enp1s0
+    version: 2
+EOF
+}
+
+vm_net_bridge_set_ip()
+{
+    local VM="$1"
+    local IP="$2"
+    MAC_VM=$(vm_net_get_mac "$VM")
+    CURRENT_IP=$(vm_net_get_ip "$VM")
+    define_netplan
+    # Obtener la dirección IP de la máquina virtual
+    scp -i ${VM_BASE_DIR}/ssh/${VM} \
+        -r $VM_BASE_DIR/init/${VM}-netplan \
+        ${VM_USER}@${CURRENT_IP}:50-cloud-init.yaml
+    ssh -i ${VM_BASE_DIR}/ssh/${VM} -l${VM_USER} ${CURRENT_IP} "bash -s" -- < ../vm_example_scripts/apply_netplan.sh
+}
+## Connect to an existent VM using ssh
+vm_connect()
+{
+    local VM=$1
+    local VM_IP=$(get_vm_ip_address "$VM")
+    ssh -i ${VM_BASE_DIR}/ssh/${VM} -l${VM_USER} ${VM_IP}
+}
+
+## Delete VM
+vm_delete ()
+{
+    local VM=$1
+    if [[ -f "$VM_IMAGE_PATH" ]]; then
+    # Safely remove the VM with confirmation
+    read -p "Are you sure you want to remove the VM '$VM' (y/N)? " confirm
+    if [[ "$confirm" =~ ^[Yy]$ ]]; then
+        # Attempt to stop the VM before deleting
+        virsh destroy "$VM" 2>/dev/null || true
+        # Delete VM definition and associated images
+        virsh undefine "$VM" 2>/dev/null || true
+        rm -fv "$VM_IMAGE_PATH" "$CI_IMAGE_PATH"
+        rm ${VM_BASE_DIR}/xml/$1.xml
+        rm ${VM_BASE_DIR}/ssh/$1*
+        rm ${VM_BASE_DIR}/init/$1-user-data
+        rm ${VM_BASE_DIR}/init/$1-meta-data
+    else
+        echo "VM removal cancelled."
+    fi
+    else
+    # Handle case where VM image is not found
+    echo "Cannot find VM image file '$VM_IMAGE_PATH'. No action taken."
+    fi
+}

base_scripts/vm_list.sh

@@ -1,2 +0,0 @@
-#!/bin/bash
-virsh list

env_scripts/newer_os.sh

@@ -0,0 +1,2 @@
+#!/bin/env bash
+GUEST_OS_TYPE_DEBIAN="debian12"

env_scripts/older_os.sh

@@ -0,0 +1,2 @@
+#!/bin/env bash
+GUEST_OS_TYPE_DEBIAN="debian11"

vm_connect.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/env bash
 #Variables
 VM="$1"
 VM_BASE_DIR=${VM_BASE_DIR:-"${HOME}/vms"}

vm_create.sh

@@ -1,6 +1,4 @@
-#!/bin/bash
+#!/bin/env bash
-
-# Variables
 VM_HOSTNAME=
 VM_BASE_DIR=${VM_BASE_DIR:-"${HOME}/vms"}
 VM_DISK_SIZE=20
@@ -11,7 +9,8 @@ VM_BASE_IMAGE=
 VM_OS_VARIANT=
 VM_USERNAME="user"
 VM_BRIDGE_INT=
-LIBVIRT_NET_OPTION="network=default,model=e1000"
+VM_NET_USED="default"
+LIBVIRT_NET_OPTION="network=$VM_NET_USED,model=e1000"
 # Functions
 usage()
 {
@@ -31,17 +30,43 @@ OPTIONS:
 EOF
 }
 
+HOST_OS=$(cat /etc/os-release | grep -v VERSION_ID |grep "ID=" | awk -F'=' '{print $2}')
+if [ $HOST_OS == "debian" ]; then
+  source < env_scripts/older_os.sh
+else 
+  source > env_scripts/newer_os.sh
+fi
+
+case $answer in
+          [1]* )  VM_OS_VARIANT=${GUEST_OS_TYPE_DEBIAN}
+                  VM_BASE_IMAGE='https://cloud.debian.org/images/cloud/bookworm/latest/debian-12-generic-amd64.qcow2'
+                  break;;
+          [2]* )  VM_OS_VARIANT='ubuntu20.04'
+                  VM_BASE_IMAGE='https://cloud-images.ubuntu.com/focal/current/focal-server-cloudimg-amd64.img'
+                  break;;
+          [3]* )  VM_OS_VARIANT='ubuntu22.04'
+                  VM_BASE_IMAGE='https://cloud-images.ubuntu.com/jammy/current/jammy-server-cloudimg-amd64.img'
+                  break;;
+          [4]* )  VM_OS_VARIANT='ubuntu24.04'
+                  VM_BASE_IMAGE='https://cloud-images.ubuntu.com/noble/current/noble-server-cloudimg-amd64.img'
+                  break;;
+          [5]* )  VM_OS_VARIANT='freebsd14.0'
+                  VM_BASE_IMAGE='https://download.freebsd.org/releases/VM-IMAGES/14.0-RELEASE/amd64/Latest/FreeBSD-14.0-RELEASE-amd64.qcow2.xz'
+                  break;;
+          * ) echo "Please answer 1,2,3,4,5.";;
+      esac
+  done
 download_base_image()
 {
-if ! test -f "$HOME/vms/base/$VM_OS_VARIANT.qcow2"; then
+if ! test -f "${VM_BASE_DIR}/base/$VM_OS_VARIANT.qcow2"; then
   if [[ "$VM_OS_VARIANT" == "freebsd14.0" ]]; then
     VM_DISK_FORMAT=".qcow2.xz"
-    wget -v -O "$HOME/vms/base/$VM_OS_VARIANT.${VM_DISK_FORMAT}" ${VM_BASE_IMAGE}
+    wget -v -O "${VM_BASE_DIR}/base/$VM_OS_VARIANT.${VM_DISK_FORMAT}" ${VM_BASE_IMAGE}
-    cd $HOME/vms/base/
+    cd ${VM_BASE_DIR}/base/
     xz -d $VM_OS_VARIANT.${VM_DISK_FORMAT} 
     cd -
   else 
-    wget -v -O "$HOME/vms/base/$VM_OS_VARIANT.${VM_DISK_FORMAT}" ${VM_BASE_IMAGE}
+    wget -v -O "${VM_BASE_DIR}/base/$VM_OS_VARIANT.${VM_DISK_FORMAT}" ${VM_BASE_IMAGE}
   fi
 fi
 }
@@ -163,9 +188,9 @@ else
 fi
 
 
-echo "Creating a qcow2 image file ${VM_BASE_DIR}/images/${VM_HOSTNAME}.img that uses the cloud image file $HOME/vms/base/$VM_OS_VARIANT.${VM_DISK_FORMAT} as its base"
+echo "Creating a qcow2 image file ${VM_BASE_DIR}/images/${VM_HOSTNAME}.img that uses the cloud image file ${VM_BASE_DIR}/base/$VM_OS_VARIANT.${VM_DISK_FORMAT} as its base"
 if ! test -f "${VM_BASE_DIR}/images/${VM_HOSTNAME}.img"; then
-    qemu-img create -b "$HOME/vms/base/${VM_OS_VARIANT}.qcow2" -f qcow2 -F qcow2 "${VM_BASE_DIR}/images/${VM_HOSTNAME}.img" "${VM_DISK_SIZE}G"
+    qemu-img create -b "${VM_BASE_DIR}/base/${VM_OS_VARIANT}.qcow2" -f qcow2 -F qcow2 "${VM_BASE_DIR}/images/${VM_HOSTNAME}.img" "${VM_DISK_SIZE}G"
 else
   echo "El fichero ${VM_BASE_DIR}/images/${VM_HOSTNAME}.img ya existe"
   exit 1

vm_delete.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/env bash
 
 # Function for usage message
 usage() {

vm_get_ip.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/env bash
 usage() {
   cat << EOF
 USO: $0 VM

vm_install.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/env bash
 VM_BASE_DIR=${VM_BASE_DIR:-"${HOME}/vms"}
 VM_USER="user"
 VM=$1

vm_list.sh

@@ -0,0 +1,2 @@
+#!/bin/env bash
+virsh list

vm_set_ip.sh

@@ -1,4 +1,5 @@
-#!/bin/bash
+#!/bin/env bash
+
 VM_BASE_DIR=${VM_BASE_DIR:-"${HOME}/vms"}
 VM_USER="user"
 MAC_VM=