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gnxi_target.go
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gnxi_target.go
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/* Copyright 2019 Google Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
https://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package main
import (
"fmt"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"net/http"
"os"
"ovs-gnxi/shared/logging"
"ovs-gnxi/target/gnxi"
"ovs-gnxi/target/watchdog"
)
var log = logging.New("ovs-gnxi")
func main() {
defer os.Exit(0)
defer log.Info("Exiting Open vSwitch gNXI interface\n")
log.Info("Starting Open vSwitch gNXI interface\n")
prometheusInstance, err := NewPrometheusMonitoringInstance("0.0.0.0", "8080")
if err != nil {
log.Errorf("Unable to configure Prometheus Monitoring: %v", err)
os.Exit(1)
}
go RunPrometheus(prometheusInstance)
gNXIServer, err := gnxi.NewServer()
if err != nil {
log.Errorf("Unable to create gNXI Server: %v", err)
os.Exit(1)
}
wd := watchdog.NewWatchdog(gNXIServer)
wd.RunServices()
}
type PrometheusMonitoringInstance struct {
IPAddress string
Port string
ErrorsGaugeMetric prometheus.Gauge
}
func NewPrometheusMonitoringInstance(ipAddress, port string) (*PrometheusMonitoringInstance, error) {
p := PrometheusMonitoringInstance{IPAddress: ipAddress, Port: port}
p.InitializeMetrics()
p.RegisterMetrics()
return &p, nil
}
func (p *PrometheusMonitoringInstance) InitializeMetrics() {
p.ErrorsGaugeMetric = prometheus.NewGauge(prometheus.GaugeOpts{
Name: "ovsgnxi_errors",
Help: "The number of errors ovs-target experienced during runtime.",
})
p.ErrorsGaugeMetric.Set(0)
}
func (p *PrometheusMonitoringInstance) RegisterMetrics() {
prometheus.MustRegister(p.ErrorsGaugeMetric)
}
func (p *PrometheusMonitoringInstance) StartPrometheus() {
log.Infof("Starting prometheus on %v:%v...", p.IPAddress, p.Port)
http.Handle("/metrics", promhttp.Handler())
log.Fatal(http.ListenAndServe(fmt.Sprintf("%v:%v", p.IPAddress, p.Port), nil))
}
func RunPrometheus(instance *PrometheusMonitoringInstance) {
instance.StartPrometheus()
log.Error("Prometheus exit")
}