add debug-image script

Author: Omarabdul3ziz

scripts/debug_image.sh

@@ -0,0 +1,141 @@
+#!/bin/bash
+
+socket="/tmp/virtiofs.sock"
+
+rootfs=""
+kernel="$rootfs/boot/vmlinuz"
+initram="$rootfs/boot/initrd.img"
+
+user="user"
+pass="pass"
+name="cloud"
+init="/sbin/init"
+
+fspid=0
+
+fail() {
+    echo "$1" >&2
+    exit 1
+}
+
+usage() {
+    echo ""
+    echo "Usage: $0 [OPTIONS]"
+    echo "  -r, --rootfs  Path to the root filesystem image (required)"
+    echo "  -u, --user     Username for the system (optional)"
+    echo "  -p, --pass     Password for the user (optional)"
+    echo "  -n, --name     Hostname for the system (optional)"
+    echo ""
+    exit 1
+}
+
+handle_options() {
+    while [[ "$#" -gt 0 ]]; do
+        case $1 in
+        --rootfs)
+            rootfs="$2"
+            kernel="$rootfs/boot/vmlinuz"
+            initram="$rootfs/boot/initrd.img"
+
+            if [[ -z "$rootfs" ]]; then
+                echo "Error: -r (rootfs) flag is required."
+                usage
+            fi
+            shift
+            ;;
+        --user)
+            user="$2"
+            shift
+            ;;
+        --pass)
+            pass="$2"
+            shift
+            ;;
+        --name)
+            name="$2"
+            shift
+            ;;
+        --init)
+            init="$2"
+            shift
+            ;;
+        *)
+            usage
+            ;;
+        esac
+        shift
+    done
+
+}
+
+validate() {
+    which virtiofsd &>/dev/null || fail "virtiofsd not found in PATH"
+    which cloud-hypervisor &>/dev/null || fail "cloud-hypervior not found in path"
+
+    if [ ! -f "${kernel}" ]; then
+        fail "kernel file not found"
+    fi
+
+    if [ ! -f "${initram}" ]; then
+        fail "kernel file not found"
+    fi
+}
+
+cidata="/tmp/cidata.img"
+create_cidata() {
+    rm -f "${cidata}"
+    mkdosfs -n CIDATA -C "${cidata}" 8192
+
+    cat >user-data <<EOF
+#cloud-config
+users:
+  - name: $user
+    plain_text_passwd: $pass
+    shell: /bin/bash
+    lock_passwd: false
+    sudo: ALL=(ALL) NOPASSWD:ALL
+EOF
+    mcopy -oi "${cidata}" -s user-data ::
+    rm -f user-data
+
+    cat >meta-data <<EOF
+instance-id: $name
+local-hostname: $name
+EOF
+    mcopy -oi "${cidata}" -s meta-data ::
+    rm -f meta-data
+}
+
+start_fs() {
+    sudo virtiofsd \
+        --socket-path="${socket}" \
+        --shared-dir="${rootfs}" \
+        --cache=never \
+        &
+
+    fspid=$!
+}
+
+cleanup() {
+    kill "$fspid" &>/dev/null || true
+}
+trap cleanup EXIT
+
+run_hypervisor() {
+    sudo cloud-hypervisor \
+        --cpus boot=1,max=1 \
+        --memory size=1024M,shared=on \
+        --kernel "${kernel}" \
+        --initramfs "${initram}" \
+        --fs tag=vroot,socket="${socket}" \
+        --disk path="${cidata}" \
+        --cmdline "rw console=ttyS0 reboot=k panic=1 root=vroot rootfstype=virtiofs rootdelay=30 init=${init}" \
+        --serial tty \
+        --console off
+}
+
+handle_options "$@"
+validate
+create_cidata
+start_fs
+run_hypervisor