| /* |
| Copyright 2017 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 nodelifecycle |
| |
| import ( |
| "sync" |
| |
| "github.com/prometheus/client_golang/prometheus" |
| ) |
| |
| const ( |
| nodeControllerSubsystem = "node_collector" |
| zoneHealthStatisticKey = "zone_health" |
| zoneSizeKey = "zone_size" |
| zoneNoUnhealthyNodesKey = "unhealthy_nodes_in_zone" |
| evictionsNumberKey = "evictions_number" |
| ) |
| |
| var ( |
| zoneHealth = prometheus.NewGaugeVec( |
| prometheus.GaugeOpts{ |
| Subsystem: nodeControllerSubsystem, |
| Name: zoneHealthStatisticKey, |
| Help: "Gauge measuring percentage of healthy nodes per zone.", |
| }, |
| []string{"zone"}, |
| ) |
| zoneSize = prometheus.NewGaugeVec( |
| prometheus.GaugeOpts{ |
| Subsystem: nodeControllerSubsystem, |
| Name: zoneSizeKey, |
| Help: "Gauge measuring number of registered Nodes per zones.", |
| }, |
| []string{"zone"}, |
| ) |
| unhealthyNodes = prometheus.NewGaugeVec( |
| prometheus.GaugeOpts{ |
| Subsystem: nodeControllerSubsystem, |
| Name: zoneNoUnhealthyNodesKey, |
| Help: "Gauge measuring number of not Ready Nodes per zones.", |
| }, |
| []string{"zone"}, |
| ) |
| evictionsNumber = prometheus.NewCounterVec( |
| prometheus.CounterOpts{ |
| Subsystem: nodeControllerSubsystem, |
| Name: evictionsNumberKey, |
| Help: "Number of Node evictions that happened since current instance of NodeController started.", |
| }, |
| []string{"zone"}, |
| ) |
| ) |
| |
| var registerMetrics sync.Once |
| |
| // Register the metrics that are to be monitored. |
| func Register() { |
| registerMetrics.Do(func() { |
| prometheus.MustRegister(zoneHealth) |
| prometheus.MustRegister(zoneSize) |
| prometheus.MustRegister(unhealthyNodes) |
| prometheus.MustRegister(evictionsNumber) |
| }) |
| } |