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117 lines
3.2 KiB
117 lines
3.2 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/golang/glog" |
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"github.com/prometheus/client_golang/extraction" |
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clientmodel "github.com/prometheus/client_golang/model" |
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"github.com/prometheus/prometheus/config" |
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) |
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type TargetManager interface { |
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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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Stop() |
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Pools() map[string]*TargetPool |
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} |
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type targetManager struct { |
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poolsByJob map[string]*TargetPool |
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ingester extraction.Ingester |
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} |
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func NewTargetManager(ingester extraction.Ingester) TargetManager { |
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return &targetManager{ |
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ingester: ingester, |
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poolsByJob: make(map[string]*TargetPool), |
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} |
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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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interval := job.ScrapeInterval() |
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targetPool = NewTargetPool(m, provider, m.ingester, interval) |
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glog.Infof("Pool for job %s does not exist; creating and starting...", job.GetName()) |
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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() |
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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 := clientmodel.LabelSet{ |
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clientmodel.JobLabel: clientmodel.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[clientmodel.LabelName(label.GetName())] = clientmodel.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, job.ScrapeTimeout(), 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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func (m *targetManager) Stop() { |
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glog.Info("Target manager exiting...") |
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for _, p := range m.poolsByJob { |
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p.Stop() |
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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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