agent: Introduce ImageService

Introduce structure ImageService, which will be used to pull images
inside the guest.

Fixes: #8103

Signed-off-by: ChengyuZhu6 <chengyu.zhu@intel.com>
co-authored-by: wllenyj <wllenyj@linux.alibaba.com>
co-authored-by: stevenhorsman <steven@uk.ibm.com>

src/agent/src/image.rs

@@ -0,0 +1,24 @@
+// Copyright (c) 2021 Alibaba Cloud
+// Copyright (c) 2021, 2023 IBM Corporation
+// Copyright (c) 2022 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+use std::sync::Arc;
+use tokio::sync::Mutex;
+use crate::sandbox::Sandbox;
+
+// Convenience function to obtain the scope logger.
+fn sl() -> slog::Logger {
+    slog_scope::logger().new(o!("subsystem" => "image"))
+}
+
+pub struct ImageService {
+    sandbox: Arc<Mutex<Sandbox>>,
+}
+impl ImageService {
+    pub fn new(sandbox: Arc<Mutex<Sandbox>>) -> Self {
+        Self { sandbox }
+    }
+}

src/agent/src/main.rs

@@ -73,6 +73,7 @@ use tokio::{
     task::JoinHandle,
 };
 
+mod image;
 mod rpc;
 mod tracer;
 

src/agent/src/rpc.rs

@@ -54,6 +54,7 @@ use rustjail::process::ProcessOperations;
 
 use crate::device::{add_devices, get_virtio_blk_pci_device_name, update_env_pci};
 use crate::features::get_build_features;
+use crate::image;
 use crate::linux_abi::*;
 use crate::metrics::get_metrics;
 use crate::mount::baremount;