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/
main.go
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/
main.go
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// Copyright 2016 The prometheus-operator Authors
//
// 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 (
"context"
"flag"
"fmt"
"net"
"net/http"
"os"
"os/signal"
"syscall"
"golang.org/x/sync/errgroup"
"github.com/galexrt/elasticsearch-operator/pkg/analytics"
"github.com/galexrt/elasticsearch-operator/pkg/api"
"github.com/galexrt/elasticsearch-operator/pkg/config"
"github.com/galexrt/elasticsearch-operator/pkg/curator"
"github.com/galexrt/elasticsearch-operator/pkg/elasticsearch"
"github.com/go-kit/kit/log"
"github.com/prometheus/common/version"
)
var (
cfg config.Config
analyticsEnabled bool
versionInfo bool
)
func init() {
flagset := flag.NewFlagSet(os.Args[0], flag.ExitOnError)
flagset.StringVar(&cfg.Host, "apiserver", "", "API Server addr, e.g. ' - NOT RECOMMENDED FOR PRODUCTION - http://127.0.0.1:8080'. Omit parameter to run in on-cluster mode and utilize the service account token.")
flagset.StringVar(&cfg.TLSConfig.CertFile, "cert-file", "", " - NOT RECOMMENDED FOR PRODUCTION - Path to public TLS certificate file.")
flagset.StringVar(&cfg.TLSConfig.KeyFile, "key-file", "", "- NOT RECOMMENDED FOR PRODUCTION - Path to private TLS certificate file.")
flagset.StringVar(&cfg.TLSConfig.CAFile, "ca-file", "", "- NOT RECOMMENDED FOR PRODUCTION - Path to TLS CA file.")
flagset.BoolVar(&cfg.TLSInsecure, "tls-insecure", false, "- NOT RECOMMENDED FOR PRODUCTION - Don't verify API server's CA certificate.")
flagset.BoolVar(&analyticsEnabled, "analytics", true, "Send analytical event (Cluster Created/Deleted etc.) to Google Analytics")
flagset.BoolVar(&versionInfo, "version", false, "Show version of elasticsearch-operator")
flagset.Parse(os.Args[1:])
}
// Main runs the operator objects and servers the api
func Main() int {
if versionInfo {
version.Print(os.Args[0])
os.Exit(0)
}
logger := log.NewLogfmtLogger(os.Stdout)
logger = log.With(logger, "ts", log.DefaultTimestampUTC, "caller", log.DefaultCaller)
if analyticsEnabled {
analytics.Enable()
}
es, err := elasticsearch.New(cfg, log.With(logger, "component", "elasticsearchoperator"))
if err != nil {
fmt.Fprint(os.Stderr, err)
return 1
}
cr, err := curator.New(cfg, log.With(logger, "component", "curatoroperator"))
if err != nil {
fmt.Fprint(os.Stderr, err)
return 1
}
web, err := api.New(cfg, log.With(logger, "component", "api"))
if err != nil {
fmt.Fprint(os.Stderr, err)
return 1
}
web.Register(http.DefaultServeMux)
l, err := net.Listen("tcp", ":8080")
if err != nil {
fmt.Fprint(os.Stderr, err)
return 1
}
ctx, cancel := context.WithCancel(context.Background())
wg, ctx := errgroup.WithContext(ctx)
wg.Go(func() error { return es.Run(ctx.Done()) })
wg.Go(func() error { return cr.Run(ctx.Done()) })
go http.Serve(l, nil)
term := make(chan os.Signal)
signal.Notify(term, os.Interrupt, syscall.SIGTERM)
select {
case <-term:
logger.Log("msg", "Received SIGTERM, exiting gracefully...")
case <-ctx.Done():
}
cancel()
if err := wg.Wait(); err != nil {
logger.Log("msg", "Unhandled error received. Exiting...", "err", err)
return 1
}
return 0
}
func main() {
os.Exit(Main())
}