virtigo/dump.go

package main

import (
	"fmt"
	"net/http"
	"strings"
	"time"

	"go.wit.com/lib/gui/shell"
	pb "go.wit.com/lib/protobuf/virtbuf"
)

/*
	debugging code to see the state of the
	cluster via http
*/

func dumpCluster(w http.ResponseWriter) {
	umap, macs, err := ValidateDroplets(me.cluster)
	for u, hostname := range umap {
		fmt.Fprintln(w, "uuid:", u, "hostname:", hostname)
	}

	for mac, uuid := range macs {
		fmt.Fprintln(w, "mac:", mac, "uuid", uuid, "hostname:", umap[uuid])
	}
	if err != nil {
		fmt.Fprintln(w, "ValidateDroplets() failed:", err)
	}
}

// list running droplets and droplets that should be running
func dumpDroplets(w http.ResponseWriter, full bool) {
	for i, d := range me.cluster.Droplets {
		var macs []string
		for _, n := range d.Networks {
			macs = append(macs, n.Mac)
		}

		// this line in golang could replace 80 lines of COBOL
		header := fmt.Sprintf("%3d %20s %3s %8s", i, strings.Join(macs, " "), d.CurrentState, d.CurrentHypervisor)

		var filenames string
		for _, disk := range d.Disks {
			filenames += disk.Filename
		}

		if d.CurrentState == pb.DropletState_ON {
			fmt.Fprintln(w, header, d.Hostname)
			continue
		}
		if d.StartState == pb.DropletState_ON {
			fmt.Fprintln(w, header, d.Hostname, "(should be on)")
			continue
		}
		if full {
			fmt.Fprintln(w, header, d.Hostname, filenames)
		}
	}
}

// status of the hypervisors
func dumpHypervisors(w http.ResponseWriter) {
	var totalDroplets int
	var totalUnknownDroplets int
	for _, h := range me.hypers {
		// lastpoll  time.Time      // the last time the hypervisor polled
		dur := time.Since(h.lastpoll)
		tmp := shell.FormatDuration(dur)
		fmt.Fprintln(w, h.pb.Hostname, "killcount =", h.killcount, "lastpoll:", tmp)
		for name, t := range h.lastDroplets {
			dur := time.Since(t)
			tmp := shell.FormatDuration(dur)
			totalDroplets += 1
			d := findDroplet(name)
			if d == nil {
				totalUnknownDroplets += 1
				fmt.Fprintln(w, "\t", h.pb.Hostname, "name =", name, "lastpoll:", tmp)
			} else {
				fmt.Fprintln(w, "\t", h.pb.Hostname, "name =", name, "lastpoll:", tmp, d.CurrentState)
			}
		}
	}
	if totalUnknownDroplets == 0 {
		fmt.Fprintln(w, "\tTotal Droplets", totalDroplets)
	} else {
		fmt.Fprintln(w, "\tTotal Droplets", totalDroplets, "total libvirt only droplets =", totalUnknownDroplets)
	}
}