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// Copyright 2017-2025 WIT.COM Inc. All rights reserved.
// Use of this source code is governed by the GPL 3.0
package main
import (
"embed"
"fmt"
"os"
"time"
"go.wit.com/lib/debian"
"go.wit.com/lib/hostname"
"go.wit.com/lib/protobuf/argvpb"
"go.wit.com/lib/protobuf/zoopb"
"go.wit.com/log"
)
// sent via -ldflags
var VERSION string
var BUILDTIME string
// used for shell auto completion
var ARGNAME string = "zood"
//go:embed resources/*
var resources embed.FS
func main() {
me = new(zoodStruct)
me.sh = argvpb.Autocomplete(&argv) // adds shell auto complete to go-args
if argv.Daemon {
// turn off timestamps for STDOUT (systemd adds them)
log.DaemonMode(true)
me.machine = debian.InitDaemon()
} else {
me.machine = debian.InitMachine()
}
if argv.Status != nil {
log.Info("todo: show status here")
me.sh.GoodExit("says hi")
}
if err := testZoo(); err != nil {
log.Info("failed to connect. sleeping for 3 minutes")
time.Sleep(3 * time.Minute)
me.sh.BadExit("failed to connect to zookeeper", err)
}
me.pollDelay = 3 * time.Second
me.failcountmax = 20 // die every minute if zookeeper can't be found
if argv.Test != nil {
testURL(me.urlbase, me.machine)
os.Exit(0)
}
zood() // talks to zookeeper
}
func testZoo() error {
var err error
if argv.URL != "" {
log.Info("USING ARGV URL:", argv.URL)
if err = testURL(argv.URL, me.machine); err == nil {
me.urlbase = argv.URL
return nil
}
}
zooname := findZookeeper()
url := fmt.Sprintf("http://%s:8080/", zooname)
if err = testURL(url, me.machine); err == nil {
me.urlbase = url
return nil
}
url = fmt.Sprintf("https://%s/", zooname)
if err = testURL(url, me.machine); err == nil {
me.urlbase = url
return nil
}
url = "http://zookeeper.wit.com:8080/"
if err = testURL(url, me.machine); err == nil {
me.urlbase = url
return nil
}
url = "https://zookeeper.wit.com/"
if err = testURL(url, me.machine); err == nil {
me.urlbase = url
return nil
}
return err
}
func findZookeeper() string {
hname, dname, err := hostname.GetDomainname()
if err != nil {
log.Info("error with os.Hostname()", hname, dname, err)
}
if dname == "" {
return "zookeeper.wit.com"
}
return hostname.Join("zookeeper", dname)
}
func testURL(urlbase string, pb *zoopb.Machine) error {
newpb, wsPB, err := pb.HttpPost(urlbase, "test")
if err != nil {
log.Info("got error:", err)
return err
}
wsPB.DumpClient()
log.Infof("mem=%d cpus=%d\n", newpb.Memory, newpb.Cpus)
log.Info("got error:", err)
return err
}
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