| /* |
| Copyright 2015 The Kubernetes 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. |
| */ |
| |
| package metrics |
| |
| import ( |
| "sync" |
| "time" |
| |
| "github.com/prometheus/client_golang/prometheus" |
| ) |
| |
| const ( |
| // DockerOperationsKey is the key for docker operation metrics. |
| DockerOperationsKey = "docker_operations" |
| // DockerOperationsLatencyKey is the key for the operation latency metrics. |
| DockerOperationsLatencyKey = "docker_operations_latency_microseconds" |
| // DockerOperationsErrorsKey is the key for the operation error metrics. |
| DockerOperationsErrorsKey = "docker_operations_errors" |
| // DockerOperationsTimeoutKey is the key for the operation timeout metrics. |
| DockerOperationsTimeoutKey = "docker_operations_timeout" |
| |
| // Keep the "kubelet" subsystem for backward compatibility. |
| kubeletSubsystem = "kubelet" |
| ) |
| |
| var ( |
| // DockerOperationsLatency collects operation latency numbers by operation |
| // type. |
| DockerOperationsLatency = prometheus.NewSummaryVec( |
| prometheus.SummaryOpts{ |
| Subsystem: kubeletSubsystem, |
| Name: DockerOperationsLatencyKey, |
| Help: "Latency in microseconds of Docker operations. Broken down by operation type.", |
| }, |
| []string{"operation_type"}, |
| ) |
| // DockerOperations collects operation counts by operation type. |
| DockerOperations = prometheus.NewCounterVec( |
| prometheus.CounterOpts{ |
| Subsystem: kubeletSubsystem, |
| Name: DockerOperationsKey, |
| Help: "Cumulative number of Docker operations by operation type.", |
| }, |
| []string{"operation_type"}, |
| ) |
| // DockerOperationsErrors collects operation errors by operation |
| // type. |
| DockerOperationsErrors = prometheus.NewCounterVec( |
| prometheus.CounterOpts{ |
| Subsystem: kubeletSubsystem, |
| Name: DockerOperationsErrorsKey, |
| Help: "Cumulative number of Docker operation errors by operation type.", |
| }, |
| []string{"operation_type"}, |
| ) |
| // DockerOperationsTimeout collects operation timeouts by operation type. |
| DockerOperationsTimeout = prometheus.NewCounterVec( |
| prometheus.CounterOpts{ |
| Subsystem: kubeletSubsystem, |
| Name: DockerOperationsTimeoutKey, |
| Help: "Cumulative number of Docker operation timeout by operation type.", |
| }, |
| []string{"operation_type"}, |
| ) |
| ) |
| |
| var registerMetrics sync.Once |
| |
| // Register all metrics. |
| func Register() { |
| registerMetrics.Do(func() { |
| prometheus.MustRegister(DockerOperationsLatency) |
| prometheus.MustRegister(DockerOperations) |
| prometheus.MustRegister(DockerOperationsErrors) |
| prometheus.MustRegister(DockerOperationsTimeout) |
| }) |
| } |
| |
| // SinceInMicroseconds gets the time since the specified start in microseconds. |
| func SinceInMicroseconds(start time.Time) float64 { |
| return float64(time.Since(start).Nanoseconds() / time.Microsecond.Nanoseconds()) |
| } |