feat(runtime-rs): calculate initial size

In this commit, we refactored the logic of static resource management.

We defined the sandbox size calculated from PodSandbox's annotation and
SingleContainer's spec as initial size, which will always be the sandbox
size when booting the VM.

The configuration static_sandbox_resource_mgmt controls whether we will
modify the sandbox size in  the following container operation.

Signed-off-by: Yushuo <y-shuo@linux.alibaba.com>
Signed-off-by: Ji-Xinyou <jerryji0414@outlook.com>

src/runtime-rs/crates/resource/Cargo.toml

@@ -41,4 +41,5 @@ logging = { path = "../../../libs/logging" }
 oci = { path = "../../../libs/oci" }
 actix-rt = "2.7.0"
 persist = { path = "../persist"}
+
 [features]

src/runtime-rs/crates/resource/src/cpu_mem/initial_size.rs

@@ -13,17 +13,16 @@ use kata_types::{
     cpu::LinuxContainerCpuResources, k8s::container_type,
 };
 
-// static resource that StaticResourceManager needs, this is the spec for the
+// initial resource that InitialSizeManager needs, this is the spec for the
 // sandbox/container's workload
 #[derive(Clone, Copy, Debug)]
-struct StaticResource {
+struct InitialSize {
     vcpu: u32,
     mem_mb: u32,
 }
 
-// generate static resource(vcpu and memory in MiB) from spec's information
-// used for static resource management
-impl TryFrom<&oci::Spec> for StaticResource {
+// generate initial resource(vcpu and memory in MiB) from spec's information
+impl TryFrom<&oci::Spec> for InitialSize {
     type Error = anyhow::Error;
     fn try_from(spec: &oci::Spec) -> Result<Self> {
         let mut vcpu: u32 = 0;
@@ -65,31 +64,32 @@ impl TryFrom<&oci::Spec> for StaticResource {
         }
         info!(
             sl!(),
-            "static resource mgmt result: vcpu={}, mem_mb={}", vcpu, mem_mb
+            "(from PodSandbox's annotation / SingleContainer's spec) initial size: vcpu={}, mem_mb={}", vcpu, mem_mb
         );
         Ok(Self { vcpu, mem_mb })
     }
 }
 
-// StaticResourceManager is responsible for static resource management
+// InitialSizeManager is responsible for initial vcpu/mem management
 //
-// static resource management sizing information is optionally provided, either by
+// inital vcpu/mem management sizing information is optionally provided, either by
 // upper layer runtime (containerd / crio) or by the container spec itself (when it
 // is a standalone single container such as the one started with *docker run*)
 //
 // the sizing information uses three values, cpu quota, cpu period and memory limit,
-// and with above values it calculates the # vcpus and memory for the workload and
-// add them to default value of the config
+// and with above values it calculates the # vcpus and memory for the workload
+//
+// if the workload # of vcpus and memory is invalid for vmms, we still use default
+// value in toml_config
 #[derive(Clone, Copy, Debug)]
-pub struct StaticResourceManager {
-    resource: StaticResource,
+pub struct InitialSizeManager {
+    resource: InitialSize,
 }
 
-impl StaticResourceManager {
+impl InitialSizeManager {
     pub fn new(spec: &oci::Spec) -> Result<Self> {
         Ok(Self {
-            resource: StaticResource::try_from(spec)
-                .context("failed to construct static resource")?,
+            resource: InitialSize::try_from(spec).context("failed to construct static resource")?,
         })
     }
 
@@ -100,8 +100,13 @@ impl StaticResourceManager {
             .hypervisor
             .get_mut(hypervisor_name)
             .context("failed to get hypervisor config")?;
-        hv.cpu_info.default_vcpus += self.resource.vcpu as i32;
-        hv.memory_info.default_memory += self.resource.mem_mb;
+
+        if self.resource.vcpu > 0 {
+            hv.cpu_info.default_vcpus = self.resource.vcpu as i32
+        }
+        if self.resource.mem_mb > 0 {
+            hv.memory_info.default_memory = self.resource.mem_mb;
+        }
         Ok(())
     }
 }
@@ -151,7 +156,7 @@ mod tests {
     struct TestData<'a> {
         desc: &'a str,
         input: InputData,
-        result: StaticResource,
+        result: InitialSize,
     }
 
     fn get_test_data() -> Vec<TestData<'static>> {
@@ -163,7 +168,7 @@ mod tests {
                     quota: None,
                     memory: None,
                 },
-                result: StaticResource { vcpu: 0, mem_mb: 0 },
+                result: InitialSize { vcpu: 0, mem_mb: 0 },
             },
             TestData {
                 desc: "normal resource limit",
@@ -173,7 +178,7 @@ mod tests {
                     quota: Some(220_000),
                     memory: Some(1024 * 1024 * 512),
                 },
-                result: StaticResource {
+                result: InitialSize {
                     vcpu: 3,
                     mem_mb: 512,
                 },
@@ -183,7 +188,7 @@ mod tests {
     }
 
     #[test]
-    fn test_static_resource_mgmt_sandbox() {
+    fn test_initial_size_sandbox() {
         let tests = get_test_data();
 
         // run tests
@@ -210,22 +215,22 @@ mod tests {
                 ..Default::default()
             };
 
-            let static_resource = StaticResource::try_from(&spec);
+            let initial_size = InitialSize::try_from(&spec);
             assert!(
-                static_resource.is_ok(),
+                initial_size.is_ok(),
                 "test[{}]: {:?} should be ok",
                 i,
                 d.desc
             );
 
-            let static_resource = static_resource.unwrap();
+            let initial_size = initial_size.unwrap();
             assert_eq!(
-                static_resource.vcpu, d.result.vcpu,
+                initial_size.vcpu, d.result.vcpu,
                 "test[{}]: {:?} vcpu should be {}",
                 i, d.desc, d.result.vcpu,
             );
             assert_eq!(
-                static_resource.mem_mb, d.result.mem_mb,
+                initial_size.mem_mb, d.result.mem_mb,
                 "test[{}]: {:?} memory should be {}",
                 i, d.desc, d.result.mem_mb,
             );
@@ -233,7 +238,7 @@ mod tests {
     }
 
     #[test]
-    fn test_static_resource_mgmt_container() {
+    fn test_initial_size_container() {
         let tests = get_test_data();
 
         // run tests
@@ -261,22 +266,22 @@ mod tests {
                 ..Default::default()
             };
 
-            let static_resource = StaticResource::try_from(&spec);
+            let initial_size = InitialSize::try_from(&spec);
             assert!(
-                static_resource.is_ok(),
+                initial_size.is_ok(),
                 "test[{}]: {:?} should be ok",
                 i,
                 d.desc
             );
 
-            let static_resource = static_resource.unwrap();
+            let initial_size = initial_size.unwrap();
             assert_eq!(
-                static_resource.vcpu, d.result.vcpu,
+                initial_size.vcpu, d.result.vcpu,
                 "test[{}]: {:?} vcpu should be {}",
                 i, d.desc, d.result.vcpu,
             );
             assert_eq!(
-                static_resource.mem_mb, d.result.mem_mb,
+                initial_size.mem_mb, d.result.mem_mb,
                 "test[{}]: {:?} memory should be {}",
                 i, d.desc, d.result.mem_mb,
             );

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

@@ -5,3 +5,4 @@
 //
 
 pub mod cpu;
+pub mod initial_size;

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

@@ -317,7 +317,7 @@ impl ResourceManagerInner {
             sb_bindmnt.cleanup_sandbox_bind_mounts()
         }
     }
-    
+
     pub async fn cleanup(&self) -> Result<()> {
         // clean up cgroup
         self.cgroups_resource

src/runtime-rs/crates/runtimes/src/lib.rs

@@ -13,4 +13,3 @@ pub mod manager;
 pub use manager::RuntimeHandlerManager;
 pub use shim_interface;
 mod shim_mgmt;
-mod static_resource;

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

@@ -21,7 +21,7 @@ use kata_types::{
 use linux_container::LinuxContainer;
 use netns_rs::NetNs;
 use persist::sandbox_persist::Persist;
-use resource::network::generate_netns_name;
+use resource::{cpu_mem::initial_size::InitialSizeManager, network::generate_netns_name};
 use shim_interface::shim_mgmt::ERR_NO_SHIM_SERVER;
 use tokio::fs;
 use tokio::sync::{mpsc::Sender, RwLock};
@@ -35,7 +35,6 @@ use virt_container::{
 use wasm_container::WasmContainer;
 
 use crate::shim_mgmt::server::MgmtServer;
-use crate::static_resource::StaticResourceManager;
 
 struct RuntimeHandlerManagerInner {
     id: String,
@@ -423,14 +422,11 @@ fn load_config(spec: &oci::Spec, option: &Option<Vec<u8>>) -> Result<TomlConfig>
     //   2. If this is not a sandbox infrastructure container, but instead a standalone single container (analogous to "docker run..."),
     //	then the container spec itself will contain appropriate sizing information for the entire sandbox (since it is
     //	a single container.
-    if toml_config.runtime.static_sandbox_resource_mgmt {
-        info!(sl!(), "static resource management enabled");
-        let static_resource_manager = StaticResourceManager::new(spec)
-            .context("failed to construct static resource manager")?;
-        static_resource_manager
-            .setup_config(&mut toml_config)
-            .context("failed to setup static resource mgmt config")?;
-    }
+    let initial_size_manager =
+        InitialSizeManager::new(spec).context("failed to construct static resource manager")?;
+    initial_size_manager
+        .setup_config(&mut toml_config)
+        .context("failed to setup static resource mgmt config")?;
 
     info!(sl!(), "get config content {:?}", &toml_config);
     Ok(toml_config)