/
main.go
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/
main.go
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// Copyright 2020 Cambricon, 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
//
// http://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"
"log"
"net/http"
"os"
"github.com/Cambricon/mlu-exporter/pkg/collector"
flags "github.com/jessevdk/go-flags"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
)
type Options struct {
MetricsConfig string `long:"metrics-config" description:"configuration file of MLU exporter metrics" default:"/etc/mlu-exporter/metrics.yaml"`
MetricsPath string `long:"metrics-path" description:"metrics path of the exporter service" default:"/metrics"`
Hostname string `long:"hostname" description:"machine hostname" env:"ENV_NODE_NAME"`
Port uint `long:"port" description:"exporter service port" default:"30108" env:"ENV_SERVE_PORT"`
Collector []string `long:"collector" description:"enabled collectors" choice:"cndev" choice:"podresources" choice:"host" choice:"cnpapi" default:"cndev"`
MetricsPrefix string `long:"metrics-prefix" description:"prefix of all metric names" env:"ENV_METRICS_PREFIX"`
}
func ParseFlags() Options {
options := Options{}
parser := flags.NewParser(&options, flags.Default)
if _, err := parser.Parse(); err != nil {
code := 1
if fe, ok := err.(*flags.Error); ok {
if fe.Type == flags.ErrHelp {
code = 0
}
}
os.Exit(code)
}
log.Printf("Options: %v\n", options)
return options
}
func main() {
options := ParseFlags()
c := collector.NewCollectors(
options.Hostname,
options.MetricsConfig,
options.Collector,
options.MetricsPrefix,
)
r := prometheus.NewRegistry()
r.MustRegister(c)
http.Handle(options.MetricsPath, promhttp.HandlerFor(r, promhttp.HandlerOpts{}))
server := &http.Server{
Addr: fmt.Sprintf("0.0.0.0:%d", options.Port),
}
log.Printf("start serving at %s", server.Addr)
log.Fatal(server.ListenAndServe())
}