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// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
syntax = "proto3";
package gvisor;
// MetricMetadata contains all of the metadata describing a single metric.
message MetricMetadata {
// name is the unique name of the metric, usually in a "directory" format
// (e.g., /foo/count).
string name = 1;
// description is a human-readable description of the metric.
string description = 2;
// cumulative indicates that this metric is never decremented.
bool cumulative = 3;
// sync indicates that values from the final metric event should be
// synchronized to the backing monitoring system at exit.
//
// If sync is false, values are only sent to the monitoring system
// periodically. There is no guarantee that values will ever be received by
// the monitoring system.
bool sync = 4;
enum Type { TYPE_UINT64 = 0; }
// type is the type of the metric value.
Type type = 5;
enum Units {
UNITS_NONE = 0;
UNITS_NANOSECONDS = 1;
}
// units is the units of the metric value.
Units units = 6;
message Field {
string field_name = 1;
repeated string allowed_values = 2;
}
// fields contains the metric fields. Currently a metric can have at most
// one field.
repeated Field fields = 7;
}
// MetricRegistration contains the metadata for all metrics that will be in
// future MetricUpdates.
message MetricRegistration {
repeated MetricMetadata metrics = 1;
}
// MetricValue the value of a metric at a single point in time.
message MetricValue {
// name is the unique name of the metric, as in MetricMetadata.
string name = 1;
// value is the value of the metric at a single point in time. The field set
// depends on the type of the metric.
oneof value {
uint64 uint64_value = 2;
}
repeated string field_values = 4;
}
// MetricUpdate contains new values for multiple distinct metrics.
//
// Metrics whose values have not changed are not included.
message MetricUpdate {
repeated MetricValue metrics = 1;
}
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