fix(scripts): find the IP of the restore VMs and show the wait progress

Both VMs used one fixed MAC address, and libvirt keeps the leases of
deleted VMs, so the script could take the IP of an old VM and wait
without output for about ten minutes. Give each VM a random MAC and
match the NIC by name in the cloud-init network config. Show the
progress of the IP, SSH, and cloud-init waits, and stop the cloud-init
wait after ten minutes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/restore-backup-vm.sh

@@ -40,8 +40,6 @@ IMAGE_DIR=${IMAGE_DIR:-/var/lib/libvirt/images/coolify-restore-test}
 NAT_NETWORK=${NAT_NETWORK:-default}
 OFFLINE_NETWORK=${OFFLINE_NETWORK:-coolify-restore-offline}
 OFFLINE_SUBNET=${OFFLINE_SUBNET:-192.168.241}
-# Both VMs use the same MAC address: the guest network config matches the NIC by MAC.
-VM_MAC=52:54:00:c0:1f:01
 UBUNTU_IMAGE_URL=https://cloud-images.ubuntu.com/noble/current/noble-server-cloudimg-amd64.img
 UBUNTU_IMAGE="$IMAGE_DIR/ubuntu-noble-amd64.qcow2"
 SSH_KEY="$IMAGE_DIR/ssh_key"
@@ -68,32 +66,44 @@ delete_vm() {
     rm -f "$IMAGE_DIR/$1.qcow2" "$IMAGE_DIR/$1-seed.iso"
 }
 
+# vm_ip <name>: the DHCP lease of the VM. Each VM has a new random MAC address,
+# so a lease of a deleted VM cannot match.
 vm_ip() {
     "${VIRSH[@]}" domifaddr "$1" --source lease 2>/dev/null |
         awk '$3 == "ipv4" { sub(/\/.*/, "", $4); print $4; exit }'
 }
 
+# wait_for_ip <name>: prints the IP address on stdout and the progress on stderr.
 wait_for_ip() {
     local ip=""
+    printf 'Waiting for the IP address of %s (up to 3 minutes)' "$1" >&2
     for _ in $(seq 1 90); do
         ip=$(vm_ip "$1")
         [ -n "$ip" ] && break
+        printf '.' >&2
         sleep 2
     done
-    [ -n "$ip" ] || die "VM $1 did not get an IP address from DHCP."
+    echo >&2
+    [ -n "$ip" ] || die "VM $1 did not get an IP address from DHCP. Boot log: virsh --connect qemu:///system console $1"
     echo "$ip"
 }
 
-# wait_for_ssh <ip>: waits for SSH and for cloud-init to finish.
+# wait_for_ssh <ip> <name>: waits for SSH and for cloud-init to finish.
 wait_for_ssh() {
-    for _ in $(seq 1 90); do
+    printf 'Waiting for SSH on %s (up to 5 minutes)' "$1"
+    for _ in $(seq 1 60); do
         if ssh "${SSH_OPTS[@]}" "root@$1" true 2>/dev/null; then
-            ssh "${SSH_OPTS[@]}" "root@$1" 'cloud-init status --wait >/dev/null || true'
+            echo
+            echo "Waiting for cloud-init in the VM (up to 10 minutes)..."
+            ssh "${SSH_OPTS[@]}" "root@$1" 'timeout 600 cloud-init status --wait >/dev/null' ||
+                echo "cloud-init did not finish cleanly; continuing. Log: /var/log/cloud-init-output.log in the VM"
             return 0
         fi
-        sleep 2
+        printf '.'
+        sleep 3
     done
-    die "SSH to root@$1 does not respond."
+    echo
+    die "SSH to root@$1 does not respond. Boot log: virsh --connect qemu:///system console $2"
 }
 
 vm_ssh() { ssh "${SSH_OPTS[@]}" "root@$VM_IP" "$@"; }
@@ -145,12 +155,22 @@ runcmd:
   - systemctl restart ssh
 EOF
     printf 'instance-id: %s-%s\nlocal-hostname: %s\n' "$name" "$(date +%s)" "$name" >"$seed_dir/meta-data"
+    # Match the NIC by name, not by MAC: the restore VM boots from the disk of the builder VM
+    # with a different MAC address. A new instance-id makes cloud-init apply this on each VM.
+    cat >"$seed_dir/network-config" <<EOF
+version: 2
+ethernets:
+  nic:
+    match:
+      name: "en*"
+    dhcp4: true
+EOF
     if command -v xorriso >/dev/null; then
-        xorriso -as mkisofs -quiet -V cidata -J -r -o "$IMAGE_DIR/$name-seed.iso" "$seed_dir/user-data" "$seed_dir/meta-data" 2>/dev/null
+        xorriso -as mkisofs -quiet -V cidata -J -r -o "$IMAGE_DIR/$name-seed.iso" "$seed_dir/user-data" "$seed_dir/meta-data" "$seed_dir/network-config" 2>/dev/null
     elif command -v cloud-localds >/dev/null; then
-        cloud-localds "$IMAGE_DIR/$name-seed.iso" "$seed_dir/user-data" "$seed_dir/meta-data"
+        cloud-localds --network-config="$seed_dir/network-config" "$IMAGE_DIR/$name-seed.iso" "$seed_dir/user-data" "$seed_dir/meta-data"
     else
-        genisoimage -quiet -V cidata -J -r -o "$IMAGE_DIR/$name-seed.iso" "$seed_dir/user-data" "$seed_dir/meta-data"
+        genisoimage -quiet -V cidata -J -r -o "$IMAGE_DIR/$name-seed.iso" "$seed_dir/user-data" "$seed_dir/meta-data" "$seed_dir/network-config"
     fi
     rm -rf "$seed_dir"
 
@@ -158,7 +178,7 @@ EOF
         --import --os-variant ubuntu24.04 \
         --disk "path=$IMAGE_DIR/$name.qcow2,format=qcow2,bus=virtio" \
         --disk "path=$IMAGE_DIR/$name-seed.iso,device=cdrom" \
-        --network "network=$network,model=virtio,mac=$VM_MAC" \
+        --network "network=$network,model=virtio" \
         --graphics none --noautoconsole >/dev/null
 }
 
@@ -174,7 +194,7 @@ build_base_image() {
     delete_vm "$BUILDER_NAME"
     create_vm "$BUILDER_NAME" "$UBUNTU_IMAGE" "$NAT_NETWORK"
     VM_IP=$(wait_for_ip "$BUILDER_NAME")
-    wait_for_ssh "$VM_IP"
+    wait_for_ssh "$VM_IP" "$BUILDER_NAME"
 
     log "Installing Coolify $VERSION in the builder VM (no backup data in this VM)"
     vm_ssh "curl -fsSL https://cdn.coollabs.io/coolify/install.sh | bash -s -- $VERSION"
@@ -256,7 +276,7 @@ ensure_offline_network
 create_vm "$VM_NAME" "$BASE_IMAGE" "$OFFLINE_NETWORK"
 VM_IP=$(wait_for_ip "$VM_NAME")
 log "VM IP address on the offline network: $VM_IP"
-wait_for_ssh "$VM_IP"
+wait_for_ssh "$VM_IP" "$VM_NAME"
 
 log "Confirming that the VM has no internet access"
 if vm_ssh 'timeout 5 bash -c "echo >/dev/tcp/1.1.1.1/443" 2>/dev/null || timeout 5 bash -c "echo >/dev/tcp/8.8.8.8/53" 2>/dev/null'; then