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120 lines
3.3 KiB
120 lines
3.3 KiB
// 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) |
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ReplaceTargets(job config.JobConfig, newTargets []Target) |
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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) *TargetPool { |
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targetPool, ok := m.poolsByJob[job.GetName()] |
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if !ok { |
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var provider TargetProvider = nil |
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if job.SdName != nil { |
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provider = NewSdTargetProvider(job) |
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} |
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targetPool = NewTargetPool(m, provider) |
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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) { |
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targetPool := m.TargetPoolForJob(job) |
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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) { |
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targetPool := m.TargetPoolForJob(job) |
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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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if job.SdName != nil { |
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m.TargetPoolForJob(job) |
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continue |
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} |
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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) |
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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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