add experimental rrd api to get cpu stats

src/api2/node.rs

@@ -9,11 +9,13 @@ mod syslog;
 mod journal;
 mod services;
 mod status;
+mod rrd;
 
 pub const SUBDIRS: SubdirMap = &[
     ("dns", &dns::ROUTER),
     ("journal", &journal::ROUTER),
     ("network", &network::ROUTER),
+    ("rrd", &rrd::ROUTER),
     ("services", &services::ROUTER),
     ("status", &status::ROUTER),
     ("syslog", &syslog::ROUTER),

src/api2/node/rrd.rs

@@ -0,0 +1,34 @@
+use anyhow::Error;
+use serde_json::Value;
+
+use proxmox::api::{api, Router};
+
+use crate::api2::types::*;
+
+#[api(
+    input: {
+        properties: {
+            node: {
+                schema: NODE_SCHEMA,
+            },
+            timeframe: {
+                type: RRDTimeFrameResolution,
+            },
+            cf: {
+                type: RRDMode,
+            },
+        },
+    },
+)]
+/// Read CPU stats
+fn get_cpu_stats(
+    timeframe: RRDTimeFrameResolution,
+    cf: RRDMode,
+    _param: Value,
+) -> Result<Value, Error> {
+
+    crate::rrd::extract_data("host/cpu", timeframe, cf)
+}
+
+pub const ROUTER: Router = Router::new()
+    .get(&API_METHOD_GET_CPU_STATS);

src/api2/types.rs

@@ -878,3 +878,31 @@ fn test_proxmox_user_id_schema() -> Result<(), anyhow::Error> {
 
     Ok(())
 }
+
+#[api()]
+#[derive(Copy, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "UPPERCASE")]
+pub enum RRDMode {
+    /// Maximum
+    Max,
+    /// Average
+    Average,
+}
+
+
+#[api()]
+#[repr(u64)]
+#[derive(Copy, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "lowercase")]
+pub enum RRDTimeFrameResolution {
+    ///  1 min => last 70 minutes
+    Hour = 60,
+    /// 30 min => last 35 hours
+    Day = 60*30,
+    /// 3 hours => about 8 days
+    Week = 60*180,
+    /// 12 hours => last 35 days
+    Month = 60*720,
+    /// 1 week => last 490 days
+    Year = 60*10080,
+}