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106 lines
3.5 KiB
106 lines
3.5 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 main |
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import ( |
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"flag" |
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"fmt" |
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"github.com/prometheus/prometheus/appstate" |
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"github.com/prometheus/prometheus/config" |
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"github.com/prometheus/prometheus/retrieval" |
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"github.com/prometheus/prometheus/retrieval/format" |
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"github.com/prometheus/prometheus/rules" |
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"github.com/prometheus/prometheus/rules/ast" |
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"github.com/prometheus/prometheus/storage/metric" |
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"github.com/prometheus/prometheus/web" |
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"log" |
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"os" |
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"os/signal" |
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"time" |
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) |
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// Commandline flags. |
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var ( |
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_ = fmt.Sprintf("") |
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configFile = flag.String("configFile", "prometheus.conf", "Prometheus configuration file name.") |
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metricsStoragePath = flag.String("metricsStoragePath", "/tmp/metrics", "Base path for metrics storage.") |
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scrapeResultsQueueCapacity = flag.Int("scrapeResultsQueueCapacity", 4096, "The size of the scrape results queue.") |
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ruleResultsQueueCapacity = flag.Int("ruleResultsQueueCapacity", 4096, "The size of the rule results queue.") |
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concurrentRetrievalAllowance = flag.Int("concurrentRetrievalAllowance", 15, "The number of concurrent metrics retrieval requests allowed.") |
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diskAppendQueueCapacity = flag.Int("queue.diskAppendCapacity", 1000000, "The size of the queue for items that are pending writing to disk.") |
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memoryAppendQueueCapacity = flag.Int("queue.memoryAppendCapacity", 1000000, "The size of the queue for items that are pending writing to memory.") |
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) |
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func main() { |
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flag.Parse() |
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conf, err := config.LoadFromFile(*configFile) |
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if err != nil { |
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log.Fatalf("Error loading configuration from %s: %v", *configFile, err) |
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} |
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ts, err := metric.NewTieredStorage(uint(*memoryAppendQueueCapacity), uint(*diskAppendQueueCapacity), 100, time.Second*30, time.Second*1, time.Second*20, *metricsStoragePath) |
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if err != nil { |
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log.Fatalf("Error opening storage: %s", err) |
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} |
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go ts.Serve() |
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go func() { |
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notifier := make(chan os.Signal) |
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signal.Notify(notifier, os.Interrupt) |
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<-notifier |
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ts.Close() |
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os.Exit(0) |
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}() |
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// Queue depth will need to be exposed |
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scrapeResults := make(chan format.Result, *scrapeResultsQueueCapacity) |
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targetManager := retrieval.NewTargetManager(scrapeResults, *concurrentRetrievalAllowance) |
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targetManager.AddTargetsFromConfig(conf) |
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ruleResults := make(chan *rules.Result, *ruleResultsQueueCapacity) |
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ast.SetStorage(ts) |
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ruleManager := rules.NewRuleManager(ruleResults, conf.Global.EvaluationInterval) |
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err = ruleManager.AddRulesFromConfig(conf) |
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if err != nil { |
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log.Fatalf("Error loading rule files: %v", err) |
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} |
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appState := &appstate.ApplicationState{ |
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Config: conf, |
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RuleManager: ruleManager, |
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Storage: ts, |
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TargetManager: targetManager, |
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} |
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web.StartServing(appState) |
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for { |
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select { |
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case scrapeResult := <-scrapeResults: |
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if scrapeResult.Err == nil { |
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ts.AppendSample(scrapeResult.Sample) |
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} |
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case ruleResult := <-ruleResults: |
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if ruleResult.Err == nil { |
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for _, sample := range ruleResult.Samples { |
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ts.AppendSample(sample) |
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} |
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} |
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} |
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} |
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}
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