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|
#!/bin/bash
set -e
vms_path=$(realpath ~/vms)
# Default vm configuration
# Declare an associative array
declare -A config
config=(
[graphic]="yes"
[audio]="no"
[boot]="menu=on"
[ram]="12G"
[cpu]="host"
[display]="sdl,grab-mod=rctrl"
[ports]="10022:22 8080:80"
[audiodevices]="intel-hda hda-duplex"
[vgadevices]="VGA,vgamem_mb=64"
[devices]=""
[bios_path]="/usr/share/qemu/bios.bin"
[net]="nic"
)
# Load config from a file
load_config() {
local file="$1" value
while read -r value; do
# Check if the line contains an equals sign
if [[ $value = *?=* ]]; then
# skip if it's a comment
if [[ "$value" == \#* ]]; then
continue
fi
local key=${value%%=*}
config[$key]=${value#*=}
fi
done <"$file"
}
# Save config to a file
save_config() {
local file="$1" key
printf "### Default vm configuration\n" >"$file"
for key in "${!config[@]}"; do
printf "# %s=%s\n" "$key" "${config[$key]}" >>"$file"
done
}
# Print the current config
print_config() {
local key
for key in "${!config[@]}"; do
printf "# %s=%s\n" "$key" "${config[$key]}"
done
}
# Print error message to stderr
printerr() { printf "%s\n" "$*" >&2; }
# Check if a file exists
file_exists() {
if [ ! -f "$1" ]; then
printerr "error: file $1 not exist"
exit 1
fi
}
# Check if the number of parameters is correct
check_params() {
if [ "$1" -lt "$2" ]; then
printerr "error: wrong parameters"
exit 1
fi
}
# Print help information
usage() {
printf "vms:
vms path: %s
commands:
$ vms run IMAGE_NAME
$ vms run arch
$ vms boot IMAGE_NAME ISO_PATH
$ vms boot arch /path/to/arch.iso
$ vms create IMAGE_NAME SIZE_OF_IMAGE
$ vms create arch 50G
$ vms list\n" "$vms_path"
exit 1
}
# Run QEMU
run_qemu() {
load_config "$1"
# Define the QEMU arguments
local qemu_args=(
--enable-kvm
-bios "${config[bios_path]}"
-boot "${config[boot]}"
-m "${config[ram]}"
-cpu "${config[cpu]}"
)
if [ -n "${config[net]}" ]; then
qemu_args+=(-net "${config[net]}")
local qemu_net_arg="user" ports
for ports in ${config[ports]}; do
IFS=':' read -ra p <<<"$ports"
if [ ${#p[@]} != 2 ]; then
printerr "error: wrong port: ${p[*]}"
exit 1
fi
qemu_net_arg+=",hostfwd=tcp::${p[0]}-:${p[1]}"
done
qemu_args+=(-net "$qemu_net_arg")
fi
local device
if [[ "${config[graphic]}" == "yes" ]]; then
qemu_args+=(-display "${config[display]}")
for device in ${config[vgadevices]}; do
qemu_args+=(-device "${device}")
done
if [[ "${config[audio]}" == "yes" ]]; then
for device in ${config[audiodevices]}; do
qemu_args+=(-device "${device}")
done
fi
else
qemu_args+=(-nographic)
fi
for device in ${config[devices]}; do
qemu_args+=(-device "${device}")
done
qemu-system-x86_64 "${qemu_args[@]}" "${@:2}"
}
# Create a new vm
create_new_vm() {
qemu-img create "$vms_path/$1.img" "$2"
}
# Create the vms directory if it doesn't exists
if [ ! -d "$vms_path" ]; then
printf "Creating vms directory in %s\n" "$vms_path"
mkdir -p "$vms_path"
fi
# Print usage information if no arguments are provided
if [ -z "$1" ]; then
usage
fi
# Ensure required commands are available
for cmd in qemu-img qemu-system-x86_64; do
if ! command -v "$cmd" &>/dev/null; then
printerr "error: $cmd is not installed"
exit 1
fi
done
case "$1" in
"run")
check_params $# 2
img_path="$vms_path/$2.img"
conf_path="$vms_path/$2.conf"
file_exists "$img_path"
file_exists "$conf_path"
img_args=(
-drive "file=$img_path,format=raw"
)
run_qemu "$conf_path" "${img_args[@]}"
;;
"boot")
check_params $# 3
img_path="$vms_path/$2.img"
conf_path="$vms_path/$2.conf"
iso_path=$(realpath "$3")
file_exists "$img_path"
file_exists "$iso_path"
file_exists "$conf_path"
img_args=(
-drive "file=$img_path,format=raw"
-cdrom "$iso_path"
)
run_qemu "$conf_path" "${img_args[@]}"
;;
"create")
check_params $# 3
iso_path="$vms_path/$2.iso"
create_new_vm "$2" "$3"
save_config "$vms_path/$2.conf"
printf "Created %s Successfully!\n" "$2"
printf "Please modify the config file: %s \n" "$vms_path/$2.conf"
;;
"list")
for img in "$vms_path"/*.img; do
printf " - %s\n" "$(basename "$img" .img)"
done
;;
"help")
usage
;;
*)
printerr "error: command $1 not found"
usage
;;
esac
|
