e2b-dev · dobrac · Dec 1, 2025 · Dec 1, 2025 · Dec 1, 2025 · Dec 1, 2025
diff --git a/.gitignore b/.gitignore
@@ -15,3 +15,4 @@ test_results/*
 /resources/linux
 /resources/x86_64
 /resources/aarch64
+aws/
diff --git a/docs/logger.md b/docs/logger.md
@@ -50,7 +50,7 @@ process:
 ```
 
 The other Logger fields have, in this case, the default values:
-`Level -> Warning`, `show_level -> false`, `show_log_origin -> false`. For
+`Level -> Debug`, `show_level -> false`, `show_log_origin -> false`. For
 configuring these too, you can also pass the following optional parameters:
 `--level <log_level>`, `--show-level`, `--show-log-origin`:
 

diff --git a/src/firecracker/swagger/firecracker.yaml b/src/firecracker/swagger/firecracker.yaml
@@ -85,12 +85,12 @@ paths:
         Will fail if update is not possible.
       operationId: putBalloon
       parameters:
-      - name: body
-        in: body
-        description: Balloon properties
-        required: true
-        schema:
-          $ref: "#/definitions/Balloon"
+        - name: body
+          in: body
+          description: Balloon properties
+          required: true
+          schema:
+            $ref: "#/definitions/Balloon"
       responses:
         204:
           description: Balloon device created/updated
@@ -109,12 +109,12 @@ paths:
         Will fail if update is not possible.
       operationId: patchBalloon
       parameters:
-      - name: body
-        in: body
-        description: Balloon properties
-        required: true
-        schema:
-          $ref: "#/definitions/BalloonUpdate"
+        - name: body
+          in: body
+          description: Balloon properties
+          required: true
+          schema:
+            $ref: "#/definitions/BalloonUpdate"
       responses:
         204:
           description: Balloon device updated
@@ -151,12 +151,12 @@ paths:
         Will fail if update is not possible.
       operationId: patchBalloonStatsInterval
       parameters:
-      - name: body
-        in: body
-        description: Balloon properties
-        required: true
-        schema:
-          $ref: "#/definitions/BalloonStatsUpdate"
+        - name: body
+          in: body
+          description: Balloon properties
+          required: true
+          schema:
+            $ref: "#/definitions/BalloonStatsUpdate"
       responses:
         204:
           description: Balloon statistics interval updated
@@ -220,7 +220,6 @@ paths:
           schema:
             $ref: "#/definitions/Error"
 
-
   /drives/{drive_id}:
     put:
       summary: Creates or updates a drive. Pre-boot only.
@@ -488,8 +487,7 @@ paths:
   /entropy:
     put:
       summary: Creates an entropy device. Pre-boot only.
-      description:
-        Enables an entropy device that provides high-quality random data to the guest.
+      description: Enables an entropy device that provides high-quality random data to the guest.
       operationId: putEntropyDevice
       parameters:
         - name: body
@@ -506,12 +504,10 @@ paths:
           schema:
             $ref: "#/definitions/Error"
 
-
   /network-interfaces/{iface_id}:
     put:
       summary: Creates a network interface. Pre-boot only.
-      description:
-        Creates new network interface with ID specified by iface_id path parameter.
+      description: Creates new network interface with ID specified by iface_id path parameter.
       operationId: putGuestNetworkInterfaceByID
       parameters:
         - name: iface_id
@@ -538,8 +534,7 @@ paths:
             $ref: "#/definitions/Error"
     patch:
       summary: Updates the rate limiters applied to a network interface. Post-boot only.
-      description:
-        Updates the rate limiters applied to a network interface.
+      description: Updates the rate limiters applied to a network interface.
       operationId: patchGuestNetworkInterfaceByID
       parameters:
         - name: iface_id
@@ -594,8 +589,7 @@ paths:
   /snapshot/load:
     put:
       summary: Loads a snapshot. Pre-boot only.
-      description:
-        Loads the microVM state from a snapshot.
+      description: Loads the microVM state from a snapshot.
         Only accepted on a fresh Firecracker process (before configuring
         any resource other than the Logger and Metrics).
       operationId: loadSnapshot
@@ -635,8 +629,7 @@ paths:
   /vm:
     patch:
       summary: Updates the microVM state.
-      description:
-        Sets the desired state (Paused or Resumed) for the microVM.
+      description: Sets the desired state (Paused or Resumed) for the microVM.
       operationId: patchVm
       parameters:
         - name: body
@@ -707,8 +700,7 @@ definitions:
     required:
       - amount_mib
       - deflate_on_oom
-    description:
-      Balloon device descriptor.
+    description: Balloon device descriptor.
     properties:
       amount_mib:
         type: integer
@@ -724,17 +716,15 @@ definitions:
     type: object
     required:
       - amount_mib
-    description:
-      Balloon device descriptor.
+    description: Balloon device descriptor.
     properties:
       amount_mib:
         type: integer
         description: Target balloon size in MiB.
 
   BalloonStats:
     type: object
-    description:
-      Describes the balloon device statistics.
+    description: Describes the balloon device statistics.
     required:
       - target_pages
       - actual_pages
@@ -798,8 +788,7 @@ definitions:
     type: object
     required:
       - stats_polling_interval_s
-    description:
-      Update the statistics polling interval, with the first statistics update scheduled immediately. Statistics cannot be turned on/off after boot.
+    description: Update the statistics polling interval, with the first statistics update scheduled immediately. Statistics cannot be turned on/off after boot.
     properties:
       stats_polling_interval_s:
         type: integer
@@ -809,8 +798,7 @@ definitions:
     type: object
     required:
       - kernel_image_path
-    description:
-      Boot source descriptor.
+    description: Boot source descriptor.
     properties:
       boot_args:
         type: string
@@ -879,21 +867,18 @@ definitions:
         type: boolean
       cache_type:
         type: string
-        description:
-          Represents the caching strategy for the block device.
+        description: Represents the caching strategy for the block device.
         enum: ["Unsafe", "Writeback"]
         default: "Unsafe"
 
       # VirtioBlock specific parameters
       is_read_only:
         type: boolean
-        description:
-          Is block read only.
+        description: Is block read only.
           This field is required for virtio-block config and should be omitted for vhost-user-block configuration.
       path_on_host:
         type: string
-        description:
-          Host level path for the guest drive.
+        description: Host level path for the guest drive.
           This field is required for virtio-block config and should be omitted for vhost-user-block configuration.
       rate_limiter:
         $ref: "#/definitions/RateLimiter"
@@ -909,8 +894,7 @@ definitions:
       # VhostUserBlock specific parameters
       socket:
         type: string
-        description:
-          Path to the socket of vhost-user-block backend.
+        description: Path to the socket of vhost-user-block backend.
           This field is required for vhost-user-block config should be omitted for virtio-block configuration.
 
   Error:
@@ -955,8 +939,7 @@ definitions:
 
   InstanceActionInfo:
     type: object
-    description:
-      Variant wrapper containing the real action.
+    description: Variant wrapper containing the real action.
     required:
       - action_type
     properties:
@@ -970,8 +953,7 @@ definitions:
 
   InstanceInfo:
     type: object
-    description:
-      Describes MicroVM instance information.
+    description: Describes MicroVM instance information.
     required:
       - app_name
       - id
@@ -999,14 +981,13 @@ definitions:
 
   Logger:
     type: object
-    description:
-      Describes the configuration option for the logging capability.
+    description: Describes the configuration option for the logging capability.
     properties:
       level:
         type: string
         description: Set the level. The possible values are case-insensitive.
         enum: [Error, Warning, Info, Debug, Trace, Off]
-        default: Info
+        default: Debug
       log_path:
         type: string
         description: Path to the named pipe or file for the human readable log output.
@@ -1085,8 +1066,7 @@ definitions:
 
   Metrics:
     type: object
-    description:
-      Describes the configuration option for the metrics capability.
+    description: Describes the configuration option for the metrics capability.
     required:
       - metrics_path
     properties:
@@ -1096,8 +1076,7 @@ definitions:
 
   MmdsConfig:
     type: object
-    description:
-      Defines the MMDS configuration.
+    description: Defines the MMDS configuration.
     required:
       - network_interfaces
     properties:
@@ -1134,13 +1113,11 @@ definitions:
 
   MmdsContentsObject:
     type: object
-    description:
-      Describes the contents of MMDS in JSON format.
+    description: Describes the contents of MMDS in JSON format.
 
   NetworkInterface:
     type: object
-    description:
-      Defines a network interface.
+    description: Defines a network interface.
     required:
       - host_dev_name
       - iface_id
@@ -1166,8 +1143,7 @@ definitions:
         type: string
       path_on_host:
         type: string
-        description:
-          Host level path for the guest drive.
+        description: Host level path for the guest drive.
           This field is optional for virtio-block config and should be omitted for vhost-user-block configuration.
       rate_limiter:
         $ref: "#/definitions/RateLimiter"
@@ -1233,12 +1209,10 @@ definitions:
     properties:
       iface_id:
         type: string
-        description:
-          The name of the interface to modify
+        description: The name of the interface to modify
       host_dev_name:
         type: string
-        description:
-          The new host device of the interface
+        description: The new host device of the interface
 
   SnapshotLoadParams:
     type: object
@@ -1250,12 +1224,10 @@ definitions:
     properties:
       enable_diff_snapshots:
         type: boolean
-        description:
-          (Deprecated) Enable dirty page tracking to improve space efficiency of diff snapshots
+        description: (Deprecated) Enable dirty page tracking to improve space efficiency of diff snapshots
       track_dirty_pages:
         type: boolean
-        description:
-          Enable dirty page tracking to improve space efficiency of diff snapshots
+        description: Enable dirty page tracking to improve space efficiency of diff snapshots
       mem_file_path:
         type: string
         description:
@@ -1273,15 +1245,13 @@ definitions:
         description: Path to the file that contains the microVM state to be loaded.
       resume_vm:
         type: boolean
-        description:
-          When set to true, the vm is also resumed if the snapshot load is successful.
+        description: When set to true, the vm is also resumed if the snapshot load is successful.
       network_overrides:
         type: array
         description: Network host device names to override
         items:
           $ref: "#/definitions/NetworkOverride"
 
-
   TokenBucket:
     type: object
     description:
@@ -1315,8 +1285,7 @@ definitions:
 
   Vm:
     type: object
-    description:
-      Defines the microVM running state. It is especially useful in the snapshotting context.
+    description: Defines the microVM running state. It is especially useful in the snapshotting context.
     required:
       - state
     properties:
@@ -1328,16 +1297,14 @@ definitions:
 
   EntropyDevice:
     type: object
-    description:
-      Defines an entropy device.
+    description: Defines an entropy device.
     properties:
       rate_limiter:
         $ref: "#/definitions/RateLimiter"
 
   FirecrackerVersion:
     type: object
-    description:
-      Describes the Firecracker version.
+    description: Describes the Firecracker version.
     required:
       - firecracker_version
     properties:

diff --git a/src/vmm/src/device_manager/pci_mngr.rs b/src/vmm/src/device_manager/pci_mngr.rs
@@ -311,7 +311,9 @@ impl<'a> Persist<'a> for PciDevices {
                              snapshotting yet"
                         );
                     } else {
-                        block_dev.prepare_save();
+                        if let Err(err) = block_dev.prepare_save() {
+                            warn!("Failed to prepare block device for save: {:?}", err);
+                        }
                         let device_state = block_dev.save();
                         state.block_devices.push(VirtioDeviceState {
                             device_id: block_dev.id().to_string(),

diff --git a/src/vmm/src/device_manager/persist.rs b/src/vmm/src/device_manager/persist.rs
@@ -265,7 +265,9 @@ impl<'a> Persist<'a> for MMIODeviceManager {
                              snapshotting yet"
                         );
                     } else {
-                        block.prepare_save();
+                        if let Err(err) = block.prepare_save() {
+                            warn!("Failed to prepare block device for save: {:?}", err);
+                        }
                         let device_state = block.save();
                         states.block_devices.push(VirtioDeviceState {
                             device_id,