// Start fsm and create new pirates
func Start() {
listener = make(chan gotocol.Message) // listener for fsm
if archaius.Conf.Population < 2 {
log.Fatal("fsm: can't create less than 2 pirates")
}
// create map of channels and a name index to select randoml nodes from
noodles = make(map[string]chan gotocol.Message, archaius.Conf.Population)
pnames = make([]string, archaius.Conf.Population) // indexable name list
log.Println("fsm: population", archaius.Conf.Population, "pirates")
for i := 1; i <= archaius.Conf.Population; i++ {
name := names.Make(archaius.Conf.Arch, "atlantic", "bermuda", "blackbeard", "pirate", i)
noodles[name] = make(chan gotocol.Message)
go pirate.Start(noodles[name])
}
i := 0
msgcount := 1
start := time.Now()
for name, noodle := range noodles {
pnames[i] = name
i++
// tell the pirate it's name and how to talk back to it's fsm
// this must be the first message the pirate sees
noodle <- gotocol.Message{gotocol.Hello, listener, time.Now(), gotocol.NilContext(), name}
if edda.Logchan != nil {
// tell the pirate to report itself and new edges to the logger
noodle <- gotocol.Message{gotocol.Inform, edda.Logchan, time.Now(), gotocol.NilContext(), ""}
msgcount = 2
}
}
log.Println("fsm: Talk amongst yourselves for", archaius.Conf.RunDuration)
rand.Seed(int64(len(noodles)))
for _, name := range pnames {
// for each pirate tell them about two other random pirates
noodle := noodles[name] // lookup the channel
// pick a first random pirate to tell this one about
talkto := pnames[rand.Intn(len(pnames))]
noodle <- gotocol.Message{gotocol.NameDrop, noodles[talkto], time.Now(), gotocol.NewRequest(), talkto}
// pick a second random pirate to tell this one about
talkto = pnames[rand.Intn(len(pnames))]
noodle <- gotocol.Message{gotocol.NameDrop, noodles[talkto], time.Now(), gotocol.NewRequest(), talkto}
// anonymously send this pirate a random amount of GoldCoin up to 100
gold := fmt.Sprintf("%d", rand.Intn(100))
noodle <- gotocol.Message{gotocol.GoldCoin, nil, time.Now(), gotocol.NewRequest(), gold}
// tell this pirate to start chatting with friends every 0.1 to 10 secs
delay := fmt.Sprintf("%dms", 100+rand.Intn(9900))
noodle <- gotocol.Message{gotocol.Chat, nil, time.Now(), gotocol.NewRequest(), delay}
}
msgcount += 4
d := time.Since(start)
log.Println("fsm: Delivered", msgcount*len(pnames), "messages in", d)
shutdown()
}
// Delete a single node from the given service
func Delete(noodles *map[string]chan gotocol.Message, service string) {
if service != "" {
for node, ch := range *noodles {
if names.Service(node) == service {
gotocol.Message{gotocol.Goodbye, nil, time.Now(), gotocol.NewRequest(), "chaosmonkey"}.GoSend(ch)
log.Println("chaosmonkey delete: " + node)
return
}
}
}
}
// Reload the network from a file
func Reload(arch string) {
listener = make(chan gotocol.Message) // listener for fsm
log.Println("fsm reloading from " + arch + ".json")
g := graphjson.ReadArch(arch)
pop := 0
// count how many nodes there are
for _, element := range g.Graph {
if element.Node != "" {
pop++
}
}
archaius.Conf.Population = pop
// create the map of channels
noodles = make(map[string]chan gotocol.Message, archaius.Conf.Population)
// Start all the services
for _, element := range g.Graph {
if element.Node != "" && element.Service != "" {
name := element.Node
noodles[name] = make(chan gotocol.Message)
// start the service and tell it it's name
switch element.Service {
case "pirate":
go pirate.Start(noodles[name])
noodles[name] <- gotocol.Message{gotocol.Hello, listener, time.Now(), gotocol.NilContext(), name}
if edda.Logchan != nil {
// tell the pirate to report itself and new edges to the logger
noodles[name] <- gotocol.Message{gotocol.Inform, edda.Logchan, time.Now(), gotocol.NilContext(), ""}
}
default:
log.Println("fsm: unknown service: " + element.Service)
}
}
}
// Make all the connections
for _, element := range g.Graph {
if element.Edge != "" && element.Source != "" && element.Target != "" {
noodles[element.Source] <- gotocol.Message{gotocol.NameDrop, noodles[element.Target], time.Now(), gotocol.NewRequest(), element.Target}
log.Println("Link " + element.Source + " > " + element.Target)
}
}
// send money and start the pirates chatting
for _, noodle := range noodles {
// same as below for now, but will save and read back from file later
// anonymously send this pirate a random amount of GoldCoin up to 100
gold := fmt.Sprintf("%d", rand.Intn(100))
noodle <- gotocol.Message{gotocol.GoldCoin, nil, time.Now(), gotocol.NewRequest(), gold}
// tell this pirate to start chatting with friends every 0.1 to 10 secs
delay := fmt.Sprintf("%dms", 100+rand.Intn(9900))
noodle <- gotocol.Message{gotocol.Chat, nil, time.Now(), gotocol.NilContext(), delay}
}
shutdown()
}
// Start the pirate, all configuration and state is sent via messages
func Start(listener chan gotocol.Message) {
dunbar := 10 // starting point for how many buddies to remember
// remember the channel to talk to named buddies
buddies := make(map[string]chan gotocol.Message, dunbar)
// remember who sent GoldCoin and how much, to buy favors
benefactors := make(map[string]int, dunbar)
var booty int // current GoldCoin balance
var fsm chan gotocol.Message // remember how to talk back to creator
var name string // remember my name
var logger chan gotocol.Message // if set, send updates
var chatrate time.Duration
hist := collect.NewHist("")
chatTicker := time.NewTicker(time.Hour)
chatTicker.Stop()
for {
select {
case msg := <-listener:
collect.Measure(hist, time.Since(msg.Sent))
if archaius.Conf.Msglog {
log.Printf("%v: %v\n", name, msg)
}
switch msg.Imposition {
case gotocol.Hello:
if name == "" {
// if I don't have a name yet remember what I've been named
fsm = msg.ResponseChan // remember how to talk to my namer
name = msg.Intention // message body is my name
hist = collect.NewHist(name)
}
case gotocol.Inform:
// remember where to send updates
logger = gotocol.InformHandler(msg, name, listener)
case gotocol.NameDrop:
// don't remember too many buddies and don't talk to myself
buddy := msg.Intention // message body is buddy name
if len(buddies) < dunbar && buddy != name {
// remember how to talk to this buddy
buddies[buddy] = msg.ResponseChan // message channel is buddy's listener
if logger != nil {
// if it's setup, tell the logger I have a new buddy to talk to
logger <- gotocol.Message{gotocol.Inform, listener, time.Now(), gotocol.NilContext(), name + " " + buddy}
}
}
case gotocol.Chat:
// setup the ticker to run at the specified rate
d, e := time.ParseDuration(msg.Intention)
if e == nil && d >= time.Millisecond && d <= time.Hour {
chatrate = d
chatTicker = time.NewTicker(chatrate)
// assume we got paid before we started chatting
rand.Seed(int64(booty))
}
case gotocol.GoldCoin:
var coin int
_, e := fmt.Sscanf(msg.Intention, "%d", &coin)
if e == nil && coin > 0 {
booty += coin
for name, ch := range buddies {
if ch == msg.ResponseChan {
benefactors[name] += coin
}
}
}
case gotocol.Goodbye:
if archaius.Conf.Msglog {
log.Printf("%v: Going away with %v gold coins, chatting every %v\n", name, booty, chatrate)
}
gotocol.Message{gotocol.Goodbye, nil, time.Now(), gotocol.NilContext(), name}.GoSend(fsm)
return
}
case <-chatTicker.C:
if rand.Intn(100) < 50 { // 50% of the time
// use Namedrop to tell the last buddy about the first
var firstBuddyName string
var firstBuddyChan, lastBuddyChan chan gotocol.Message
if len(buddies) >= 2 {
for name, ch := range buddies {
if firstBuddyName == "" {
firstBuddyName = name
firstBuddyChan = ch
} else {
lastBuddyChan = ch
}
gotocol.Message{gotocol.NameDrop, firstBuddyChan, time.Now(), gotocol.NewRequest(), firstBuddyName}.GoSend(lastBuddyChan)
}
}
} else {
// send a buddy some money
if booty > 0 {
donation := rand.Intn(booty)
luckyNumber := rand.Intn(len(buddies))
if donation > 0 {
for _, ch := range buddies {
if luckyNumber == 0 {
gotocol.Message{gotocol.GoldCoin, listener, time.Now(), gotocol.NewRequest(), fmt.Sprintf("%d", donation)}.GoSend(ch)
booty -= donation
break
} else {
luckyNumber--
}
}
}
}
}
}
}
}
// Start the elb, all configuration and state is sent via messages
func Start(listener chan gotocol.Message) {
dunbar := archaius.Conf.Population
// remember the channel to talk to microservices
microservices := make(map[string]chan gotocol.Message, dunbar)
microindex := make([]chan gotocol.Message, dunbar)
dependencies := make(map[string]time.Time, dunbar) // dependent services and time last updated
var netflixoss, requestor chan gotocol.Message // remember how to talk back to creator
var name string // remember my name
eureka := make(map[string]chan gotocol.Message, 3) // service registry per zone
var chatrate time.Duration
ep, _ := time.ParseDuration(archaius.Conf.EurekaPoll)
eurekaTicker := time.NewTicker(ep)
hist := collect.NewHist("")
chatTicker := time.NewTicker(time.Hour)
chatTicker.Stop()
for {
select {
case msg := <-listener:
collect.Measure(hist, time.Since(msg.Sent))
if archaius.Conf.Msglog {
log.Printf("%v: %v\n", name, msg)
}
switch msg.Imposition {
case gotocol.Hello:
if name == "" {
// if I don't have a name yet remember what I've been named
netflixoss = msg.ResponseChan // remember how to talk to my namer
name = msg.Intention // message body is my name
hist = collect.NewHist(name)
}
case gotocol.Inform:
eureka[msg.Intention] = gotocol.InformHandler(msg, name, listener)
case gotocol.NameDrop: // cross zone = true
gotocol.NameDropHandler(&dependencies, µservices, msg, name, listener, eureka, true)
case gotocol.Forget:
// forget a buddy
gotocol.ForgetHandler(&dependencies, µservices, msg)
case gotocol.Chat:
// setup the ticker to run at the specified rate
d, e := time.ParseDuration(msg.Intention)
if e == nil && d >= time.Millisecond && d <= time.Hour {
chatrate = d
chatTicker = time.NewTicker(chatrate)
}
case gotocol.GetRequest:
// route the request on to microservices
requestor = msg.ResponseChan
// Intention body indicates which service to route to or which key to get
// need to lookup service by type rather than randomly call one day
if len(microservices) > 0 {
if len(microindex) != len(microservices) {
// rebuild index
i := 0
for _, ch := range microservices {
microindex[i] = ch
i++
}
}
m := rand.Intn(len(microservices))
// pass on request to a random service
gotocol.Message{gotocol.GetRequest, listener, time.Now(), msg.Ctx.NewSpan(), msg.Intention}.GoSend(microindex[m])
}
case gotocol.GetResponse:
// return path from a request, send payload back up
if requestor != nil {
gotocol.Message{gotocol.GetResponse, listener, time.Now(), msg.Ctx.NewSpan(), msg.Intention}.GoSend(requestor)
}
case gotocol.Put:
// route the request on to a random dependency
if len(microservices) > 0 {
if len(microindex) != len(microservices) {
// rebuild index
i := 0
for _, ch := range microservices {
microindex[i] = ch
i++
}
}
m := rand.Intn(len(microservices))
// pass on request to a random service
gotocol.Message{gotocol.Put, listener, time.Now(), msg.Ctx.NewSpan(), msg.Intention}.GoSend(microindex[m])
}
case gotocol.Goodbye:
if archaius.Conf.Msglog {
log.Printf("%v: Going away, chatting every %v\n", name, chatrate)
}
gotocol.Message{gotocol.Goodbye, nil, time.Now(), gotocol.NilContext(), name}.GoSend(netflixoss)
return
}
case <-eurekaTicker.C: // check to see if any new dependencies have appeared
for dep, _ := range dependencies {
for _, ch := range eureka {
ch <- gotocol.Message{gotocol.GetRequest, listener, time.Now(), gotocol.NilContext(), dep}
}
}
case <-chatTicker.C:
if len(microservices) > 0 {
// build index if needed
if len(microindex) != len(microservices) {
i := 0
for _, ch := range microservices {
microindex[i] = ch
i++
}
}
m := rand.Intn(len(microservices))
// start a request to a random member of this elb
gotocol.Message{gotocol.GetRequest, listener, time.Now(), gotocol.NewRequest(), name}.GoSend(microindex[m])
}
}
}
}
// Start the denominator, all configuration and state is sent via messages
func Start(listener chan gotocol.Message) {
dunbar := 6 // starting point for how many nodes to remember
// remember the channel to talk to microservices
microservices := make(map[string]chan gotocol.Message, dunbar)
microindex := make([]chan gotocol.Message, dunbar)
dependencies := make(map[string]time.Time, dunbar) // dependent services and time last updated
var netflixoss chan gotocol.Message // remember how to talk back to creator
var name string // remember my name
hist := collect.NewHist("") // don't know name yet
eureka := make(map[string]chan gotocol.Message, 3*archaius.Conf.Regions) // service registry per zone and region
var chatrate time.Duration
ep, _ := time.ParseDuration(archaius.Conf.EurekaPoll)
eurekaTicker := time.NewTicker(ep)
chatTicker := time.NewTicker(time.Hour)
chatTicker.Stop()
for {
select {
case msg := <-listener:
collect.Measure(hist, time.Since(msg.Sent))
if archaius.Conf.Msglog {
log.Printf("%v: %v\n", name, msg)
}
switch msg.Imposition {
case gotocol.Hello:
if name == "" {
// if I don't have a name yet remember what I've been named
netflixoss = msg.ResponseChan // remember how to talk to my namer
name = msg.Intention // message body is my name
hist = collect.NewHist(name)
}
case gotocol.Inform:
eureka[msg.Intention] = gotocol.InformHandler(msg, name, listener)
case gotocol.NameDrop:
gotocol.NameDropHandler(&dependencies, µservices, msg, name, listener, eureka)
case gotocol.Forget:
// forget a buddy
gotocol.ForgetHandler(&dependencies, µservices, msg)
case gotocol.Chat:
// setup the ticker to run at the specified rate
d, e := time.ParseDuration(msg.Intention)
if e == nil && d >= time.Millisecond && d <= time.Hour {
chatrate = d
chatTicker = time.NewTicker(chatrate)
}
case gotocol.GetResponse:
// return path from a request
// nothing to do at this level
case gotocol.Goodbye:
if archaius.Conf.Msglog {
log.Printf("%v: Going away, was chatting every %v\n", name, chatrate)
}
gotocol.Message{gotocol.Goodbye, nil, time.Now(), gotocol.NilContext(), name}.GoSend(netflixoss)
return
}
case <-eurekaTicker.C: // check to see if any new dependencies have appeared
for dep, _ := range dependencies {
for _, ch := range eureka {
ch <- gotocol.Message{gotocol.GetRequest, listener, time.Now(), gotocol.NilContext(), dep}
}
}
case <-chatTicker.C:
if len(microservices) > 0 {
// build index if needed
if len(microindex) != len(microservices) {
i := 0
for _, ch := range microservices {
microindex[i] = ch
i++
}
}
m := rand.Intn(len(microservices))
// start a request to a random member of this denominator
if rand.Intn(2) == 0 {
gotocol.Message{gotocol.GetRequest, listener, time.Now(), gotocol.NewRequest(), "why?"}.GoSend(microindex[m])
} else {
gotocol.Message{gotocol.Put, listener, time.Now(), gotocol.NewRequest(), "remember me"}.GoSend(microindex[m])
}
}
}
}
}