add experimental rrd api to 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,
+}