Move VM vCPU timeseries to TOML (#6035)

Author: bnaecker

openapi/nexus.json

@@ -19800,7 +19800,8 @@
         "enum": [
           "count",
           "bytes",
-          "seconds"
+          "seconds",
+          "nanoseconds"
         ]
       },
       "User": {

oximeter/impl/src/schema/codegen.rs

@@ -518,6 +518,9 @@ impl quote::ToTokens for Units {
             Units::Count => quote! { ::oximeter::schema::Units::Count },
             Units::Bytes => quote! { ::oximeter::schema::Units::Bytes },
             Units::Seconds => quote! { ::oximeter::schema::Units::Seconds },
+            Units::Nanoseconds => {
+                quote! { ::oximeter::schema::Units::Nanoseconds }
+            }
         };
         toks.to_tokens(tokens);
     }

oximeter/impl/src/schema/mod.rs

@@ -190,6 +190,7 @@ pub enum Units {
     Count,
     Bytes,
     Seconds,
+    Nanoseconds,
 }
 
 /// The schema for a timeseries.

oximeter/oximeter/schema/virtual-machine.toml

@@ -0,0 +1,65 @@
+format_version = 1
+
+[target]
+name = "virtual_machine"
+description = "A guest virtual machine instance"
+authz_scope = "project"
+versions = [
+    { version = 1, fields = [ "instance_id", "project_id", "silo_id" ] },
+]
+
+[[metrics]]
+name = "vcpu_usage"
+description = "Cumulative time each vCPU has spent in a state"
+units = "nanoseconds"
+datum_type = "cumulative_u64"
+versions = [
+    { added_in = 1, fields = [ "state", "vcpu_id" ] }
+]
+
+[[metrics]]
+name = "reset"
+description = "Cumulative number of times the virtual machine has been reset"
+units = "count"
+datum_type = "cumulative_u64"
+versions = [
+    { added_in = 1, fields = [ ] }
+]
+
+[[metrics]]
+name = "pv_panic_guest_handled"
+description = "Cumulative number of times a PVPANIC event was handled by the guest"
+units = "count"
+datum_type = "cumulative_u64"
+versions = [
+    { added_in = 1, fields = [ ] }
+]
+
+[[metrics]]
+name = "pv_panic_host_handled"
+description = "Cumulative number of times a PVPANIC event was handled by the host"
+units = "count"
+datum_type = "cumulative_u64"
+versions = [
+    { added_in = 1, fields = [ ] }
+]
+
+[fields.instance_id]
+type = "uuid"
+description = "ID of the virtual machine instance"
+
+[fields.project_id]
+type = "uuid"
+description = "ID of the virtual machine instance's project"
+
+[fields.silo_id]
+type = "uuid"
+description = "ID of the virtual machine instance's silo"
+
+[fields.state]
+type = "string"
+description = "The state of the vCPU"
+
+[fields.vcpu_id]
+type = "u32"
+description = "The ID of the vCPU"