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64 lines (59 loc) · 1.77 KB
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Copy pathconfd.go
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64 lines (59 loc) · 1.77 KB
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// Copyright (c) 2013 Kelsey Hightower. All rights reserved.
// Use of this source code is governed by the Apache License, Version 2.0
// that can be found in the LICENSE file.
package main
import (
"flag"
"os"
"time"
"github.com/kelseyhightower/confd/log"
)
var (
configFile = ""
defaultConfigFile = "/etc/confd/confd.toml"
onetime bool
quiet bool
)
func init() {
flag.StringVar(&configFile, "C", "", "confd config file")
flag.BoolVar(&onetime, "onetime", false, "run once and exit")
flag.BoolVar(&quiet, "q", false, "silence non-error messages")
}
func main() {
// Most flags are defined in the confd/config package which allow us to
// override configuration settings from the cli. Parse the flags now to
// make them active.
flag.Parse()
// non-error messages are not printed by default, enable them now.
// If the "-q" flag was passed on the commandline non-error messages will
// not be printed.
log.SetQuiet(quiet)
log.Info("Starting confd")
if configFile == "" {
if IsFileExist(defaultConfigFile) {
configFile = defaultConfigFile
}
}
if err := loadConfig(configFile); err != nil {
log.Fatal(err.Error())
}
// Create the etcd client upfront and use it for the life of the process.
// The etcdClient is an http.Client and designed to be reused.
etcdClient, err := newEtcdClient(EtcdNodes(), ClientCert(), ClientKey())
if err != nil {
log.Fatal(err.Error())
}
for {
runErrors := ProcessTemplateResources(etcdClient)
// If the -onetime flag is passed on the command line we immediately exit
// after processing the template config files.
if onetime {
if len(runErrors) > 0 {
os.Exit(1)
}
os.Exit(0)
}
// By default we poll etcd every 30 seconds
time.Sleep(time.Duration(Interval()) * time.Second)
}
}