From ba9eed114a57e9361fb101507c19ebc2c2f4eeac Mon Sep 17 00:00:00 2001
From: primardj <b00168148@mytudublin.ie>
Date: Sat, 13 Jan 2024 16:50:37 +0000
Subject: [PATCH] a simple vm launcher

---
 vm-start.sh | 165 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 165 insertions(+)
 create mode 100755 vm-start.sh

diff --git a/vm-start.sh b/vm-start.sh
new file mode 100755
index 0000000..3dc4c1d
--- /dev/null
+++ b/vm-start.sh
@@ -0,0 +1,165 @@
+#!/bin/bash
+#
+
+#RESULT_POSSIBLE=("init","start","start-backup","create","backup","restore")
+
+VERSION=0.5
+MAIN_LOCATION="$HOME/virtual-machine/"
+
+
+INIT() {
+    echo "INIT for vm $1"
+    NAME=$1
+    echo "How many proccessor will you use ? "
+    read NPROC
+    echo "How much memory will you need ? "
+    read MEMORY
+
+    echo "Do you want to forward ssh port (y/n) "
+    read entry
+
+    if [[ $entry =~ ^[yY]$ ]]
+    then
+        FORWARD=",hostfwd=tcp::10022-:22" # forward VM 22 port to Host 10022 
+    else
+        FORWARD=""
+    fi
+
+    mkdir -p conf
+    echo "
+NAME=\"$NAME\"
+VMHOSTNAME=\"\$NAME-vm\"
+NPROC=$NPROC
+MEMORY=\"$MEMORY\"
+FORWARD=\"$FORWARD\"
+LOCATION=\"\$NAME-sandbox/\"
+" > conf/$NAME-vm_var.sh
+    chmod +x conf/$NAME-vm_var.sh
+
+}
+
+START() {
+    qemu-system-x86_64 \
+        -enable-kvm \
+        -cpu host \
+        -smp $NPROC \
+        -net nic \
+        -net user$FORWARD,hostname=$VMHOSTNAME \
+        -m $MEMORY \
+        -drive file=${MAIN_LOCATION}${LOCATION}${VMHOSTNAME}.cow \
+        -daemonize
+
+    sleep 5
+
+    ssh -o "StrictHostKeyChecking no" -o "UserKnownHostsFile=/dev/null" primardj@localhost -p 10022
+}
+
+START-BACKUP() {
+    qemu-system-x86_64 \
+        -enable-kvm \
+        -cpu host \
+        -smp $NPROC \
+        -net nic \
+        -net user$FORWARD,hostname=$VMHOSTNAME \
+        -m $MEMORY \
+        -drive file=${MAIN_LOCATION}${LOCATION}${VMHOSTNAME}.cow.backup \
+        -daemonize
+
+    sleep 5
+
+    #ssh -o "StrictHostKeyChecking no" -o "UserKnownHostsFile=/dev/null" primardj@localhost -p 10022
+}
+
+CREATE() {
+
+    if [[ ! -f ${MAIN_LOCATION}${LOCATION}${VMHOSTNAME}.cow ]]
+    then
+        echo "ceate directory ${MAIN_LOCATION}${LOCATION}"
+        mkdir -p ${MAIN_LOCATION}${LOCATION}
+        qemu-img create -f qcow2 ${MAIN_LOCATION}${LOCATION}${VMHOSTNAME}.cow 40G
+    fi
+
+
+    qemu-system-x86_64 \
+        -enable-kvm \
+        -cpu host \
+        -smp $NPROC \
+        -net nic \
+        -net user$FORWARD,hostname=$VMHOSTNAME \
+        -m $MEMORY \
+        -drive file=${MAIN_LOCATION}${LOCATION}${VMHOSTNAME}.cow \
+        -boot d \
+        -drive file="$1",media=cdrom
+}
+
+RESTORE() {
+    echo "Are you sure you want to restore the rescue? (y/N)"
+    read entry
+    if [[ $entry =~ ^[yY]$ ]]
+    then
+        cp ${MAIN_LOCATION}${LOCATION}${VMHOSTNAME}.cow.backup ${MAIN_LOCATION}${LOCATION}${VMHOSTNAME}.cow
+        echo "Done"
+    fi
+}
+
+
+BACKUP() {
+    echo "Are you sure you want to backup the volume? If you continue the previous backup will be lost (y/N)"
+    read entry
+    if [[ $entry =~ ^[yY]$ ]]
+    then
+        cp ${MAIN_LOCATION}${LOCATION}${VMHOSTNAME}.cow ${MAIN_LOCATION}${LOCATION}${VMHOSTNAME}.cow.backup
+        echo "Done"
+    fi
+}
+
+
+if [ $# -lt 2 ]
+then
+    echo "Error, not enough args"
+    exit 1
+fi
+
+cd "$( dirname "$( readlink -f "$0" )" )"
+
+if [[ ! -f conf/$1-vm_var.sh ]]
+then
+    INIT $1
+fi
+
+source conf/$1-vm_var.sh
+
+
+if [ "$2" == "start" ]
+then
+    echo "starting VM $1"
+    START
+elif [ "$2" == "start-backup" ]
+then
+    echo "starting VM rescue"
+    START-BACKUP
+elif [ "$2" == "backup" ]
+then
+    echo "backup VM"
+    BACKUP
+elif [ "$2" == "restore" ]
+then
+    echo "restore VM"
+    RESTORE
+elif [ "$2" == "create" ]
+then
+    echo "creating VM"
+    if [[ $# == 3 ]]
+    then
+        echo "using image disk $3"
+        CREATE $3
+    else
+        echo "Error, no image defined."
+    fi
+elif [[ "$2" == "version" ]]
+then
+    echo "script lancement vm version v.$VERSION"
+else
+    echo "commande $2 inconnue"
+fi
+