5b844b5017
* plugin/forward: add it This moves coredns/forward into CoreDNS. Fixes as a few bugs, adds a policy option and more tests to the plugin. Update the documentation, test IPv6 address and add persistent tests. * Always use random policy when spraying * include scrub fix here as well * use correct var name * Code review * go vet * Move logging to metrcs * Small readme updates * Fix readme
52 lines
1.6 KiB
Go
52 lines
1.6 KiB
Go
package forward
|
|
|
|
import (
|
|
"sync"
|
|
|
|
"github.com/coredns/coredns/plugin"
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
)
|
|
|
|
// Variables declared for monitoring.
|
|
var (
|
|
RequestCount = prometheus.NewCounterVec(prometheus.CounterOpts{
|
|
Namespace: plugin.Namespace,
|
|
Subsystem: "forward",
|
|
Name: "request_count_total",
|
|
Help: "Counter of requests made per upstream.",
|
|
}, []string{"to"})
|
|
RcodeCount = prometheus.NewCounterVec(prometheus.CounterOpts{
|
|
Namespace: plugin.Namespace,
|
|
Subsystem: "forward",
|
|
Name: "response_rcode_count_total",
|
|
Help: "Counter of requests made per upstream.",
|
|
}, []string{"rcode", "to"})
|
|
RequestDuration = prometheus.NewHistogramVec(prometheus.HistogramOpts{
|
|
Namespace: plugin.Namespace,
|
|
Subsystem: "forward",
|
|
Name: "request_duration_seconds",
|
|
Buckets: plugin.TimeBuckets,
|
|
Help: "Histogram of the time each request took.",
|
|
}, []string{"to"})
|
|
HealthcheckFailureCount = prometheus.NewCounterVec(prometheus.CounterOpts{
|
|
Namespace: plugin.Namespace,
|
|
Subsystem: "forward",
|
|
Name: "healthcheck_failure_count_total",
|
|
Help: "Counter of the number of failed healtchecks.",
|
|
}, []string{"to"})
|
|
HealthcheckBrokenCount = prometheus.NewCounter(prometheus.CounterOpts{
|
|
Namespace: plugin.Namespace,
|
|
Subsystem: "forward",
|
|
Name: "healthcheck_broken_count_total",
|
|
Help: "Counter of the number of complete failures of the healtchecks.",
|
|
})
|
|
SocketGauge = prometheus.NewGaugeVec(prometheus.GaugeOpts{
|
|
Namespace: plugin.Namespace,
|
|
Subsystem: "forward",
|
|
Name: "socket_count_total",
|
|
Help: "Guage of open sockets per upstream.",
|
|
}, []string{"to"})
|
|
)
|
|
|
|
var once sync.Once
|