runtime-rs: Log system enhancement

By modifying RuntimeLevelFilter drain to improve logging control,
enabling isolation of change effect of the loggers between components,
tuning clh logs to be logged according to their log levels
given by cloud-hypervisor.

Fixes: #8310

Signed-off-by: Ruoqing He <linuxwatcher@outlook.com>

src/runtime-rs/crates/resource/src/manager.rs

@@ -48,6 +48,9 @@ impl ResourceManager {
         hypervisor: Arc<dyn Hypervisor>,
         toml_config: Arc<TomlConfig>,
     ) -> Result<Self> {
+        // Regist resource logger for later use.
+        logging::register_subsystem_logger("runtimes", "resource");
+
         Ok(Self {
             inner: Arc::new(RwLock::new(
                 ResourceManagerInner::new(sid, agent, hypervisor, toml_config).await?,

src/runtime-rs/crates/resource/src/rootfs/mod.rs

@@ -12,6 +12,7 @@ use async_trait::async_trait;
 use kata_types::mount::Mount;
 mod block_rootfs;
 use hypervisor::{device::device_manager::DeviceManager, Hypervisor};
+
 use std::{sync::Arc, vec::Vec};
 use tokio::sync::RwLock;