63 lines
1.2 KiB
Go
63 lines
1.2 KiB
Go
package merger
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import (
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"context"
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"io"
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"net/http"
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"sync"
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"time"
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prom "github.com/prometheus/client_model/go"
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)
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type Merger interface {
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Merge(w io.Writer) error
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AddSource(url string, labels []*prom.LabelPair)
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}
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type merger struct {
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mu sync.Mutex
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scrapeTimeout time.Duration
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client *http.Client
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sources []*source
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}
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type source struct {
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url string
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labels []*prom.LabelPair
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}
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func New(scrapeTimeout time.Duration) Merger {
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client := &http.Client{
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Transport: &http.Transport{
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DisableKeepAlives: false,
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DisableCompression: false,
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MaxIdleConns: 1,
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MaxIdleConnsPerHost: 1,
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MaxConnsPerHost: 10,
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IdleConnTimeout: 5 * time.Minute,
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},
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Timeout: scrapeTimeout,
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}
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return &merger{
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scrapeTimeout: scrapeTimeout,
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client: client,
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}
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}
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// AddSource new source
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func (m *merger) AddSource(url string, labels []*prom.LabelPair) {
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m.mu.Lock()
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defer m.mu.Unlock()
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m.sources = append(m.sources, &source{url: url, labels: labels})
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}
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// Merge sources
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func (m *merger) Merge(w io.Writer) error {
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m.mu.Lock()
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defer m.mu.Unlock()
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ctx, cancel := context.WithTimeout(context.Background(), m.scrapeTimeout)
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defer cancel()
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return m.merge(ctx, w)
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}
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