mirror of
https://github.com/prometheus/prometheus.git
synced 2024-11-10 15:44:05 -08:00
8f4c7ece92
The use of naked return values is frowned upon. This is the first of two bulk updates to remove them.
111 lines
3.3 KiB
Go
111 lines
3.3 KiB
Go
// Copyright 2013 Prometheus Team
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package retrieval
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import (
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"github.com/prometheus/prometheus/config"
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"github.com/prometheus/prometheus/model"
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"github.com/prometheus/prometheus/retrieval/format"
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"log"
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"time"
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)
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type TargetManager interface {
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acquire()
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release()
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AddTarget(job config.JobConfig, t Target, defaultScrapeInterval time.Duration)
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ReplaceTargets(job config.JobConfig, newTargets []Target, defaultScrapeInterval time.Duration)
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Remove(t Target)
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AddTargetsFromConfig(config config.Config)
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Pools() map[string]*TargetPool
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}
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type targetManager struct {
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requestAllowance chan bool
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poolsByJob map[string]*TargetPool
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results chan format.Result
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}
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func NewTargetManager(results chan format.Result, requestAllowance int) TargetManager {
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return &targetManager{
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requestAllowance: make(chan bool, requestAllowance),
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results: results,
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poolsByJob: make(map[string]*TargetPool),
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}
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}
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func (m *targetManager) acquire() {
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m.requestAllowance <- true
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}
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func (m *targetManager) release() {
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<-m.requestAllowance
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}
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func (m *targetManager) TargetPoolForJob(job config.JobConfig, defaultScrapeInterval time.Duration) *TargetPool {
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targetPool, ok := m.poolsByJob[job.GetName()]
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if !ok {
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targetPool = NewTargetPool(m)
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log.Printf("Pool for job %s does not exist; creating and starting...", job.GetName())
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interval := job.ScrapeInterval()
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m.poolsByJob[job.GetName()] = targetPool
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// BUG(all): Investigate whether this auto-goroutine creation is desired.
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go targetPool.Run(m.results, interval)
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}
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return targetPool
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}
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func (m *targetManager) AddTarget(job config.JobConfig, t Target, defaultScrapeInterval time.Duration) {
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targetPool := m.TargetPoolForJob(job, defaultScrapeInterval)
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targetPool.AddTarget(t)
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m.poolsByJob[job.GetName()] = targetPool
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}
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func (m *targetManager) ReplaceTargets(job config.JobConfig, newTargets []Target, defaultScrapeInterval time.Duration) {
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targetPool := m.TargetPoolForJob(job, defaultScrapeInterval)
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targetPool.replaceTargets(newTargets)
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}
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func (m targetManager) Remove(t Target) {
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panic("not implemented")
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}
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func (m *targetManager) AddTargetsFromConfig(config config.Config) {
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for _, job := range config.Jobs() {
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for _, targetGroup := range job.TargetGroup {
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baseLabels := model.LabelSet{
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model.JobLabel: model.LabelValue(job.GetName()),
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}
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if targetGroup.Labels != nil {
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for _, label := range targetGroup.Labels.Label {
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baseLabels[model.LabelName(label.GetName())] = model.LabelValue(label.GetValue())
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}
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}
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for _, endpoint := range targetGroup.Target {
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target := NewTarget(endpoint, time.Second*5, baseLabels)
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m.AddTarget(job, target, config.ScrapeInterval())
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}
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}
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}
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}
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// XXX: Not really thread-safe. Only used in /status page for now.
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func (m *targetManager) Pools() map[string]*TargetPool {
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return m.poolsByJob
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}
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