attempt to discover zookeeper hostname

Makefile

@@ -9,7 +9,7 @@ REDOMOD = $(shell if [ -e go.sum ]; then  echo go.sum exists; else GO111MODULE=
 
 all: build
 	./zood --version
-	./zood
+	./zood test
 
 build: goimports
 	GO111MODULE=off go build -v -x \

README

@@ -1 +1,3 @@
 This is the zookeeper daemon.
+
+It is simple. It's just designed to keep packages up to date.

argv.go

@@ -16,11 +16,15 @@ import (
 var argv args
 
 type args struct {
+	Test   *EmptyCmd `arg:"subcommand:test"                      help:"New to forge? This is for you.'"`
 	Daemon bool      `arg:"--daemon"           default:"false"  help:"run in daemon mode"`
 	Port   int       `arg:"--port"             default:"2521"   help:"port to run on"`
 	URL    string    `arg:"--url"                               help:"url to use"`
 }
 
+type EmptyCmd struct {
+}
+
 func (args) Version() string {
 	return "zood " + VERSION + "   Built on: " + BUILDTIME
 }

daemon.go

@@ -16,10 +16,26 @@ func TimeFunction(f func()) time.Duration {
 	return time.Since(startTime) // Calculate the elapsed time
 }
 
-func NewWatchdog() {
+// sends updates to zookeeper
+func zood() {
 	me.dog = time.NewTicker(me.pollDelay)
 	defer me.dog.Stop()
 	done := make(chan bool)
+	for {
+		select {
+		case <-done:
+			fmt.Println("Done!")
+			return
+		case _ = <-me.dog.C:
+			s := me.machine.UpdatePackages()
+			me.failcount += 1
+			sendMachine(s)
+
+			if me.failcount > 20 {
+				os.Exit(0)
+			}
+		}
+	}
 	/*
 		// this example would exit/destroy the ticker in 10 seconds
 		go func() {
@@ -27,23 +43,4 @@ func NewWatchdog() {
 			done <- true
 		}()
 	*/
-	for {
-		select {
-		case <-done:
-			fmt.Println("Done!")
-			return
-		case _ = <-me.dog.C:
-			// log.Info("Watchdog() ticked", me.zookeeper, "Current time: ", t)
-			s := me.machine.UpdatePackages()
-			// pingStatus()
-			me.failcount += 1
-			sendMachine(s)
-
-			if me.failcount > 20 {
-				os.Exit(0)
-			}
-			// h.pollHypervisor()
-			// h.Scan()
-		}
-	}
 }

http.go

@@ -1,119 +0,0 @@
-// Copyright 2017-2025 WIT.COM Inc. All rights reserved.
-// Use of this source code is governed by the GPL 3.0
-
-package main
-
-import (
-	"fmt"
-	"io/ioutil"
-	"net/http"
-	"os"
-	"strings"
-
-	"go.wit.com/log"
-)
-
-// remove '?' part and trailing '/'
-func cleanURL(url string) string {
-	url = "/" + strings.Trim(url, "/")
-	return url
-}
-
-func okHandler(w http.ResponseWriter, r *http.Request) {
-	log.Info("Got URL Path: ", r.URL.Path)
-	route := cleanURL(r.URL.Path)
-
-	domname := r.URL.Query().Get("domain")
-	flag := r.URL.Query().Get("flag")
-
-	msg, err := ioutil.ReadAll(r.Body) // Read the body as []byte
-	if err != nil {
-		fmt.Fprintln(w, "ReadAll() error =", err)
-		return
-	}
-
-	log.Info("Got URL msg:", string(msg))
-	if route == "/" {
-		fmt.Fprintln(w, "OK")
-		return
-	}
-
-	// exit the virtigo daemon & have systemd restart it
-	// this can happen & when it does, access to
-	// to libvirtd will hang (aka: virsh list will hang)
-	// One way to trigger this is to not properly close
-	// domain sockets opened from go-qemu/hypervisor
-	// it's a good idea in any case so leave it here
-	if route == "/kill" {
-		log.Warn("KILLED")
-		fmt.Fprintln(w, "KILLED")
-		os.Exit(-1)
-		return
-	}
-
-	// curl http://localhost:2520/import?domain=foo.bar.com
-	if route == "/import" {
-		fmt.Fprint(w, "import domain:", domname)
-
-		return
-	}
-
-	// toggle logging flags
-	if route == "/flag" {
-		log.HttpMode(w)
-		defer log.HttpMode(nil)
-		log.Info("going to toggle flag:", flag)
-		switch flag {
-		case "PING":
-			if PING.Enabled() {
-				log.Log(NOW, "toogle PING false")
-				PING.SetBool(false)
-			} else {
-				log.Log(NOW, "toogle PING true")
-				PING.SetBool(true)
-			}
-		default:
-			log.Info("unknown looging flag:", flag)
-		}
-		return
-	}
-
-	if route == "/favicon.ico" {
-		writeFile(w, "ipv6.png")
-		return
-	}
-
-	log.Warn("BAD URL =", route)
-}
-
-func writeFile(w http.ResponseWriter, filename string) {
-	// fmt.Fprintln(w, "GOT TEST?")
-	fullname := "resources/" + filename
-	pfile, err := resources.ReadFile(fullname)
-	if err != nil {
-		log.Println("ERROR:", err)
-		// w.Write(pfile)
-		return
-	}
-
-	var repohtml string
-	repohtml = string(pfile)
-	if filename == "goReference.svg" {
-		w.Header().Set("Content-Type", "image/svg+xml")
-	}
-	fmt.Fprintln(w, repohtml)
-	log.Println("writeFile() found internal file:", filename)
-}
-
-// starts and sits waiting for HTTP requests
-func startHTTP() {
-	http.HandleFunc("/", okHandler)
-
-	p := fmt.Sprintf(":%d", argv.Port)
-	log.Println("Running on port", p)
-
-	err := http.ListenAndServe(p, nil)
-	if err != nil {
-		log.Println("Error starting server:", err)
-	}
-}

main.go

@@ -5,11 +5,12 @@ package main
 
 import (
 	"embed"
+	"fmt"
 	"os"
 	"time"
 
 	"go.wit.com/dev/alexflint/arg"
-	"go.wit.com/lib/protobuf/forgepb"
+	"go.wit.com/lib/hostname"
 	"go.wit.com/lib/protobuf/zoopb"
 	"go.wit.com/log"
 )
@@ -21,35 +22,94 @@ var BUILDTIME string
 var resources embed.FS
 
 func main() {
-	var pp *arg.Parser
+	me = new(zoodStruct)
-	pp = arg.MustParse(&argv)
+	me.pp = arg.MustParse(&argv)
 
-	if pp == nil {
+	if me.pp == nil {
-		pp.WriteHelp(os.Stdout)
+		me.pp.WriteHelp(os.Stdout)
 		os.Exit(0)
 	}
 
 	if argv.Daemon {
 		// turn off timestamps for STDOUT (systemd adds them)
 		log.DaemonMode(true)
+		me.machine, me.fullpath = zoopb.InitDaemon()
+	} else {
+		me.machine, me.fullpath = zoopb.InitMachine()
+
 	}
 
-	me = new(stuff)
+	if err := testZoo(); err != nil {
-	me.urlbase = "http://zookeeper.grid.wit.com:8080"
+		log.Info("FAILED TO CONNECT TO ZOOKEEPER: ", err)
-	if argv.URL != "" {
+		log.Info("sleeping for 3 minutes")
-		log.Info("USING ARGV URL:", argv.URL)
+		time.Sleep(3 * time.Minute)
-		me.urlbase = argv.URL
+		os.Exit(0)
 	}
-
 	me.pollDelay = 3 * time.Second
 	me.failcountmax = 20 // die every minute if zookeeper can't be found
 
-	// me.machine.ConfigLoad()
+	if argv.Test != nil {
+		testURL(me.urlbase, me.machine)
+		os.Exit(0)
+	}
 
-	me.forge = forgepb.InitPB()
+	zood() // talks to zookeeper
-	me.machine = zoopb.InitMachine()
+}
-
+
-	go NewWatchdog()
+func testZoo() error {
-
+	var err error
-	startHTTP()
+	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()
+	newpb.Dump()
+	log.Info("got error:", err)
+	return err
 }

structs.go

@@ -6,20 +6,21 @@ package main
 import (
 	"time"
 
-	"go.wit.com/lib/protobuf/forgepb"
+	"go.wit.com/dev/alexflint/arg"
 	"go.wit.com/lib/protobuf/zoopb"
 )
 
-var me *stuff
+var me *zoodStruct
 
 // this app's variables
-type stuff struct {
+type zoodStruct struct {
 	urlbase      string         // the dns name for the zookeeper
 	hostname     string         // my hostname
 	pollDelay    time.Duration  // how often to report our status
 	dog          *time.Ticker   // the watchdog timer
 	machine      *zoopb.Machine // populated from protobuf based zoopb
-	forge        *forgepb.Forge // handle to forge
 	failcount    int            // how many times we've failed to contact the zookeeper
 	failcountmax int            // after this, exit and let systemd restart the daemon
+	fullpath     string         // where to save the machine PB file
+	pp           *arg.Parser    // from go-args
 }