feature(krata): dynamic resource allocation (closes #298) (#333)

crates/ctl/src/cli/zone/update_resources.rs

@@ -0,0 +1,76 @@
+use anyhow::Result;
+use clap::Parser;
+use krata::v1::{
+    common::ZoneResourceSpec,
+    control::{control_service_client::ControlServiceClient, UpdateZoneResourcesRequest},
+};
+
+use crate::cli::resolve_zone;
+use krata::v1::control::GetZoneRequest;
+use tonic::{transport::Channel, Request};
+
+#[derive(Parser)]
+#[command(about = "Update the available resources to a zone")]
+pub struct ZoneUpdateResourcesCommand {
+    #[arg(help = "Zone to update resources of, either the name or the uuid")]
+    zone: String,
+    #[arg(short, long, default_value_t = 0, help = "vCPUs available to the zone")]
+    cpus: u32,
+    #[arg(
+        short = 'M',
+        long = "max-memory",
+        default_value_t = 0,
+        help = "Maximum memory available to the zone, in megabytes"
+    )]
+    max_memory: u64,
+    #[arg(
+        short = 'm',
+        long = "target-memory",
+        default_value_t = 0,
+        help = "Memory target for the zone, in megabytes"
+    )]
+    target_memory: u64,
+}
+
+impl ZoneUpdateResourcesCommand {
+    pub async fn run(self, mut client: ControlServiceClient<Channel>) -> Result<()> {
+        let zone_id = resolve_zone(&mut client, &self.zone).await?;
+        let zone = client
+            .get_zone(GetZoneRequest { zone_id })
+            .await?
+            .into_inner()
+            .zone
+            .unwrap_or_default();
+        let active_resources = zone
+            .status
+            .clone()
+            .unwrap_or_default()
+            .resource_status
+            .unwrap_or_default()
+            .active_resources
+            .unwrap_or_default();
+        client
+            .update_zone_resources(Request::new(UpdateZoneResourcesRequest {
+                zone_id: zone.id.clone(),
+                resources: Some(ZoneResourceSpec {
+                    max_memory: if self.max_memory == 0 {
+                        active_resources.max_memory
+                    } else {
+                        self.max_memory
+                    },
+                    target_memory: if self.target_memory == 0 {
+                        active_resources.target_memory
+                    } else {
+                        self.target_memory
+                    },
+                    cpus: if self.cpus == 0 {
+                        active_resources.cpus
+                    } else {
+                        self.cpus
+                    },
+                }),
+            }))
+            .await?;
+        Ok(())
+    }
+}