forked from uber/arachne
/
metrics_statsd.go
130 lines (109 loc) · 4.11 KB
/
metrics_statsd.go
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// Copyright (c) 2016 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package metrics
import (
"fmt"
"time"
"github.com/DataDog/datadog-go/statsd"
"github.com/uber-go/zap"
"gopkg.in/validator.v2"
"gopkg.in/yaml.v2"
)
// StatsdConfiger implements metrics.Opt.
type StatsdConfiger struct{}
// StatsdConfig implements metrics.Config.
type StatsdConfig struct {
Metrics struct {
Statsd *statsdFileConfig `yaml:"statsd"`
} `yaml:"metrics"`
}
type statsdFileConfig struct {
// The host and port of the statsd server
HostPort string `yaml:"hostPort" validate:"nonzero"`
// The prefix to use in reporting to statsd
Prefix string `yaml:"prefix" validate:"nonzero"`
// FlushInterval is the maximum interval for sending packets.
// If it is not specified, it defaults to 1 second.
FlushInterval time.Duration `yaml:"flushInterval"`
// FlushBytes specifies the maximum udp packet size you wish to send.
// If FlushBytes is unspecified, it defaults to 1432 bytes, which is
// considered safe for local traffic.
FlushBytes int `yaml:"flushBytes"`
}
// statsdReporter is a backend to report metrics to.
type statsdReporter struct {
client *statsd.Client
}
// Assert that we continue to implement the required interfaces.
var (
_ Opt = (*StatsdConfiger)(nil)
_ Config = (*StatsdConfig)(nil)
)
// UnmarshalConfig fetches the configuration file from local path.
func (c StatsdConfiger) UnmarshalConfig(data []byte, fname string, logger zap.Logger) (Config, error) {
cfg := new(StatsdConfig)
if err := yaml.Unmarshal(data, cfg); err != nil {
return nil, fmt.Errorf("error unmarshaling the statsd section in the configuration file %s: %v",
fname, err)
}
// Validate on the merged config at the end
if err := validator.Validate(cfg); err != nil {
return nil, fmt.Errorf("invalid info in the statsd section in the configuration file %s: %v",
fname, err)
}
return Config(cfg), nil
}
// NewReporter creates a new metrics backend talking to Statsd.
func (c StatsdConfig) NewReporter(logger zap.Logger) (Reporter, error) {
s, err := statsd.New(c.Metrics.Statsd.HostPort)
if err != nil {
return nil, err
}
// add service as prefix
s.Namespace = fmt.Sprintf("%s.", "arachne")
logger.Info("Statsd Metrics configuration", zap.Object("object", fmt.Sprintf("%+v", s)))
return &statsdReporter{client: s}, nil
}
func (b *statsdReporter) ReportCounter(name string, tags Tags, value int64) {
t := make([]string, 0, len(tags))
for k, v := range tags {
t = append(t, fmt.Sprintf("%s:%s", k, v))
}
b.client.Count(name, value, t, 1.0)
}
func (b *statsdReporter) ReportGauge(name string, tags Tags, value int64) {
t := make([]string, 0, len(tags))
for k, v := range tags {
t = append(t, fmt.Sprintf("%s:%s", k, v))
}
b.client.Gauge(name, float64(value), t, 1.0)
}
func (b *statsdReporter) RecordTimer(name string, tags Tags, d time.Duration) {
t := make([]string, 0, len(tags))
for k, v := range tags {
t = append(t, fmt.Sprintf("%s:%s", k, v))
}
b.client.TimeInMilliseconds(name, d.Seconds()*1000, t, 1.0)
}
func (b *statsdReporter) Flush() {
}
func (b *statsdReporter) Close() error {
return nil
}