2338120f5b
This registers the Collectors iff the metrics plugin has been loaded. Safes a bunch of code in each and every plugin's setup code.
47 lines
1.3 KiB
Go
47 lines
1.3 KiB
Go
package template
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import (
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"sync"
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"github.com/coredns/coredns/plugin"
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"github.com/coredns/coredns/plugin/metrics"
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"github.com/mholt/caddy"
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"github.com/prometheus/client_golang/prometheus"
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)
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// Metrics for template.
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var (
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TemplateMatchesCount = prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: plugin.Namespace,
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Subsystem: "template",
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Name: "matches_total",
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Help: "Counter of template regex matches.",
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}, []string{"zone", "class", "type"})
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TemplateFailureCount = prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: plugin.Namespace,
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Subsystem: "template",
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Name: "template_failures_total",
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Help: "Counter of go template failures.",
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}, []string{"zone", "class", "type", "section", "template"})
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TemplateRRFailureCount = prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: plugin.Namespace,
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Subsystem: "template",
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Name: "rr_failures_total",
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Help: "Counter of mis-templated RRs.",
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}, []string{"zone", "class", "type", "section", "template"})
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)
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// OnStartupMetrics sets up the metrics on startup.
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func setupMetrics(c *caddy.Controller) error {
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c.OnStartup(func() error {
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metricsOnce.Do(func() {
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metrics.MustRegister(c, TemplateMatchesCount, TemplateFailureCount, TemplateRRFailureCount)
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})
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return nil
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})
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return nil
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}
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var metricsOnce sync.Once
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