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// Copyright (C) 2019-2024 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
// cc_agent starts agent process on algod host
package main
import (
"flag"
"fmt"
"net/url"
"os"
"os/signal"
"strings"
"time"
"github.com/algorand/websocket"
"github.com/algorand/go-algorand/logging"
"github.com/algorand/go-algorand/test/commandandcontrol/cc_agent/component"
"github.com/algorand/go-algorand/test/commandandcontrol/lib"
)
type arrayFlags []string
func (i *arrayFlags) String() string {
return "my string representation"
}
func (i *arrayFlags) Set(value string) error {
*i = append(*i, value)
return nil
}
var log = logging.NewLogger()
var addr = flag.String("service-addr", "localhost:8080", "http service address")
var hostName = flag.String("hostname", "Host1", "host name")
var binDir = flag.String("bindir", "", "host name")
var tempDir = flag.String("tempdir", "", "host name")
var dataDirs arrayFlags
func init() {
flag.Var(&dataDirs, "nodedir", "node data directory")
flag.Var(&dataDirs, "d", "node data directory (shorthand)")
}
var serverChannel = make(chan []byte, 100)
func checkFlags() (ok bool) {
ok = true
if len(dataDirs) == 0 {
log.Errorf("Use the -nodedir or -d flag to specify one or more node data directories")
ok = false
}
if len(*binDir) == 0 {
log.Errorf("Use the -bindir flag to specify the location of the algod bin directory")
ok = false
}
if len(*tempDir) == 0 {
log.Errorf("Use the -tempdir flag to specify the location of the tmp directory directory")
ok = false
}
return ok
}
func main() {
flag.Parse()
log.SetLevel(logging.Debug)
if !checkFlags() {
os.Exit(1)
}
component.GetHostAgent().BinDir = *binDir
component.GetHostAgent().TempDir = *tempDir
// build the algo node map based on the data dirs
algoNodeMap := make(map[string]component.AlgodNode)
for _, dataDir := range dataDirs {
dataDirParts := strings.Split(dataDir, "/")
nodeName := dataDirParts[len(dataDirParts)-1]
if nodeName == "" {
nodeName = dataDirParts[len(dataDirParts)-2]
}
algodNode := component.AlgodNode{
Name: nodeName,
Status: "OK",
DataDir: dataDir,
}
algoNodeMap[nodeName] = algodNode
}
interrupt := make(chan os.Signal, 1)
signal.Notify(interrupt, os.Interrupt)
component.GetHostAgent().Host = component.Host{
Name: *hostName,
NodeMap: algoNodeMap,
}
hostConfigMessage := fmt.Sprintf("New Agent Host Config: %+v", component.GetHostAgent().Host)
log.Infof("%s", hostConfigMessage)
serverChannel <- []byte(hostConfigMessage)
u := url.URL{Scheme: "ws", Host: *addr, Path: "/agent"}
log.Infof("connecting to %s", u.String())
serverWs, _, err := websocket.DefaultDialer.Dial(u.String(), nil)
if err != nil {
log.Error("dial:", err)
}
serverWs.Unsafe = true
defer func() {
log.Infof("closing service websocket: %s", serverWs.LocalAddr())
err := serverWs.Close()
if err != nil {
log.Errorf("error closing service websocket %v", err)
}
}()
go forwardMessagesToServer(serverWs)
component.GetHostAgent().ServiceConnection = serverWs
done := make(chan struct{})
// accept and process commands sent from CC Service
go func() {
defer close(done)
for {
var managementServiceRequest lib.CCServiceRequest
err := serverWs.ReadJSON(&managementServiceRequest)
if err != nil {
log.Errorf("ReadJSON %v:", err)
return
}
log.Infof("recv: %+v", managementServiceRequest)
err = component.GetHostAgent().ProcessRequest(managementServiceRequest)
if err != nil {
log.Errorf("error processRequest: %v\n", err)
return
}
serverChannel <- []byte(fmt.Sprintf("agent %s is processing request %+v", component.GetHostAgent().Host.Name, managementServiceRequest))
}
}()
// Send heartbeat to CC Service
ticker := time.NewTicker(time.Second * 60)
defer ticker.Stop()
for {
select {
case <-done:
return
case t := <-ticker.C:
err := serverWs.WriteMessage(websocket.TextMessage, []byte(fmt.Sprintf("heartbeat from agent %s with time %s", component.GetHostAgent().Host.Name, t.String())))
if err != nil {
log.Error("write:", err)
return
}
case <-interrupt:
log.Infof("interrupt")
// Cleanly close the connection by sending a close message and then
// waiting (with timeout) for the server to close the connection.
err := serverWs.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""))
if err != nil {
log.Error("write close:", err)
return
}
select {
case <-done:
case <-time.After(time.Second):
}
return
}
}
}
func forwardMessagesToServer(serverWs *websocket.Conn) {
log.Infof("forwardMessagesToServer()\n")
for {
// Wait for the next message from the server channel
msg := <-serverChannel
err := serverWs.WriteMessage(websocket.TextMessage, msg)
if err != nil {
log.Errorf("error: %v", err)
err = serverWs.Close()
if err != nil {
log.Errorf("error closing server websocket %v", err)
}
}
}
}
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