// TODO auth
func (this *Start) statusHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json; charset=utf8")
w.Header().Set("Server", "ehaproxy")
log.Info("%s status", r.RemoteAddr)
var (
wg sync.WaitGroup
mu sync.Mutex
aggStats = make(map[string]map[string]int64)
)
for i := 0; i < ctx.NumCPU(); i++ {
wg.Add(1)
go func(i int) {
defer wg.Done()
uri := fmt.Sprintf("http://127.0.0.1:%d/stats?stats;csv", i+dashboardPortHead)
stats := fetchDashboardStats(uri)
mu.Lock()
for name, colVals := range stats {
if _, present := aggStats[name]; !present {
aggStats[name] = make(map[string]int64)
}
for k, v := range colVals {
aggStats[name][k] += v
}
}
mu.Unlock()
}(i)
}
wg.Wait()
b, _ := json.Marshal(aggStats)
w.Write(b)
}
func (this *Start) reload(kwInstances []string) {
var servers = BackendServers{
CpuNum: ctx.NumCPU(),
HaproxyRoot: this.root,
ForwardFor: this.forwardFor,
PubPort: this.pubPort,
SubPort: this.subPort,
ManPort: this.manPort,
}
servers.reset()
for _, kwNode := range kwInstances {
data, _, err := this.zkzone.Conn().Get(kwNode)
if err != nil {
log.Error("%s: %v", kwNode, err)
continue
}
info := make(map[string]string)
if err = json.Unmarshal([]byte(data), &info); err != nil {
log.Error("%s: %v", data, err)
continue
}
// pub
if info["pub"] != "" {
_, port, _ := net.SplitHostPort(info["pub"])
be := Backend{
Name: "p" + info["id"],
Addr: info["pub"],
Cpu: info["cpu"],
Port: port,
}
servers.Pub = append(servers.Pub, be)
}
// sub
if info["sub"] != "" {
_, port, _ := net.SplitHostPort(info["sub"])
be := Backend{
Name: "s" + info["id"],
Addr: info["sub"],
Cpu: info["cpu"],
Port: port,
}
servers.Sub = append(servers.Sub, be)
}
// man
if info["man"] != "" {
_, port, _ := net.SplitHostPort(info["man"])
be := Backend{
Name: "m" + info["id"],
Addr: info["man"],
Cpu: info["cpu"],
Port: port,
}
servers.Man = append(servers.Man, be)
}
}
for i := 0; i < ctx.NumCPU(); i++ {
servers.Dashboard = append(servers.Dashboard, Backend{
Port: fmt.Sprintf("%d", dashboardPortHead+i),
Name: fmt.Sprintf("%d", i+1), // process id starts from 1
})
}
if servers.empty() {
log.Warn("empty backend servers, all shutdown?")
return
}
if reflect.DeepEqual(this.lastServers, servers) {
log.Warn("backend servers stays unchanged")
return
}
this.lastServers = servers
if err := this.createConfigFile(servers); err != nil {
log.Error(err)
return
}
if err := this.reloadHAproxy(); err != nil {
log.Error("reloading haproxy: %v", err)
panic(err)
}
}
// TODO
// 1. broker id assignment
// 2. port assignment
func (this *Deploy) Run(args []string) (exitCode int) {
cmdFlags := flag.NewFlagSet("deploy", flag.ContinueOnError)
cmdFlags.Usage = func() { this.Ui.Output(this.Help()) }
cmdFlags.StringVar(&this.zone, "z", "", "")
cmdFlags.StringVar(&this.cluster, "c", "", "")
cmdFlags.StringVar(&this.kafkaBaseDir, "kafka.base", ctx.KafkaHome(), "")
cmdFlags.StringVar(&this.brokerId, "broker.id", "", "")
cmdFlags.StringVar(&this.tcpPort, "port", "", "")
cmdFlags.StringVar(&this.rootPah, "root", "/var/wd", "")
cmdFlags.StringVar(&this.ip, "ip", "", "")
cmdFlags.StringVar(&this.logDirs, "log.dirs", "", "")
cmdFlags.StringVar(&this.runAs, "user", "sre", "")
cmdFlags.StringVar(&this.uninstall, "uninstall", "", "")
cmdFlags.BoolVar(&this.demoMode, "demo", false, "")
cmdFlags.BoolVar(&this.installKafkaOnly, "kfkonly", false, "")
cmdFlags.BoolVar(&this.dryRun, "dryrun", true, "")
cmdFlags.StringVar(&this.influxDbAddr, "influx", "", "")
cmdFlags.StringVar(&this.kafkaVer, "ver", "2.10-0.8.2.2", "")
if err := cmdFlags.Parse(args); err != nil {
return 1
}
if this.uninstall != "" {
serverProperties := fmt.Sprintf("%s/config/server.properties", this.uninstall)
lines, err := gio.ReadLines(serverProperties)
if err != nil {
this.Ui.Error(err.Error())
return 2
}
var logDirs []string
for _, line := range lines {
if strings.HasPrefix(line, "log.dirs") {
parts := strings.SplitN(line, "=", 2)
logDirs = strings.Split(parts[1], ",")
break
}
}
if len(logDirs) == 0 {
this.Ui.Error("empty log.dirs")
return 2
}
for _, logDir := range logDirs {
this.Ui.Output(fmt.Sprintf("rm -rf %s", logDir))
}
name := filepath.Base(this.uninstall)
this.Ui.Output(fmt.Sprintf("chkconfig --del %s", name))
this.Ui.Output(fmt.Sprintf("rm -f /etc/init.d/%s", name))
this.Ui.Output(fmt.Sprintf("rm -rf %s", this.uninstall))
return 0
}
if !ctx.CurrentUserIsRoot() {
this.Ui.Error("requires root priviledges!")
return 1
}
if !strings.HasSuffix(this.kafkaBaseDir, this.kafkaVer) {
this.Ui.Error(fmt.Sprintf("kafka.base[%s] does not match ver[%s]",
this.kafkaBaseDir, this.kafkaVer))
return 1
}
if this.installKafkaOnly {
this.installKafka()
return
}
if validateArgs(this, this.Ui).
require("-z", "-c").
invalid(args) {
return 2
}
this.zkzone = zk.NewZkZone(zk.DefaultConfig(this.zone, ctx.ZoneZkAddrs(this.zone)))
clusers := this.zkzone.Clusters()
zkchroot, present := clusers[this.cluster]
if !present {
this.Ui.Error(fmt.Sprintf("run 'gk clusters -z %s -add %s -p $zkchroot' first!",
this.zone, this.cluster))
return 1
}
var err error
this.userInfo, err = user.Lookup(this.runAs)
swallow(err)
if this.demoMode {
this.demo()
return
}
if validateArgs(this, this.Ui).
require("-broker.id", "-port", "-ip", "-log.dirs").
invalid(args) {
return 2
}
if this.dryRun {
this.Ui.Output(fmt.Sprintf("mkdir %s/logs and chown to %s",
this.instanceDir(), this.runAs))
}
err = os.MkdirAll(fmt.Sprintf("%s/logs", this.instanceDir()), 0755)
swallow(err)
chown(fmt.Sprintf("%s/logs", this.instanceDir()), this.userInfo)
invalidDir := this.validateLogDirs(this.logDirs)
if invalidDir != "" {
this.Ui.Error(fmt.Sprintf("%s in log.dirs not exists!", invalidDir))
return 2
}
// prepare the root directory
this.rootPah = strings.TrimSuffix(this.rootPah, "/")
if this.dryRun {
this.Ui.Output(fmt.Sprintf("mkdir %s/bin and chown to %s",
this.instanceDir(), this.runAs))
}
err = os.MkdirAll(fmt.Sprintf("%s/bin", this.instanceDir()), 0755)
swallow(err)
chown(fmt.Sprintf("%s/bin", this.instanceDir()), this.userInfo)
if this.dryRun {
this.Ui.Output(fmt.Sprintf("mkdir %s/config and chown to %s",
this.instanceDir(), this.runAs))
}
err = os.MkdirAll(fmt.Sprintf("%s/config", this.instanceDir()), 0755)
swallow(err)
chown(fmt.Sprintf("%s/config", this.instanceDir()), this.userInfo)
type templateVar struct {
KafkaBase string
BrokerId string
TcpPort string
Ip string
User string
ZkChroot string
ZkAddrs string
InstanceDir string
LogDirs string
IoThreads string
NetworkThreads string
InfluxReporterEnabled string
InfluxDbHost string
InfluxDbPort string
}
if this.influxDbAddr != "" {
this.influxDbHost, this.influxdbPort, err = net.SplitHostPort(this.influxDbAddr)
if err != nil {
this.Ui.Error(err.Error())
return 2
}
if this.influxDbHost == "" || this.influxdbPort == "" {
this.Ui.Error("empty influxdb host or port")
return 2
}
}
influxReporterEnabled := "false"
if this.influxDbHost != "" {
influxReporterEnabled = "true"
}
data := templateVar{
ZkAddrs: this.zkzone.ZkAddrs(),
ZkChroot: zkchroot,
KafkaBase: this.kafkaBaseDir,
BrokerId: this.brokerId,
Ip: this.ip,
InstanceDir: this.instanceDir(),
User: this.runAs,
TcpPort: this.tcpPort,
LogDirs: this.logDirs,
InfluxReporterEnabled: influxReporterEnabled,
InfluxDbHost: this.influxDbHost,
InfluxDbPort: this.influxdbPort,
}
data.IoThreads = strconv.Itoa(3 * len(strings.Split(data.LogDirs, ",")))
networkThreads := ctx.NumCPU() / 2
if networkThreads < 2 {
networkThreads = 2
}
data.NetworkThreads = strconv.Itoa(networkThreads) // TODO not used yet
// create the log.dirs directory and chown to sre
logDirs := strings.Split(this.logDirs, ",")
for _, logDir := range logDirs {
if this.dryRun {
this.Ui.Output(fmt.Sprintf("mkdir %s and chown to %s",
logDir, this.runAs))
}
swallow(os.MkdirAll(logDir, 0755))
chown(logDir, this.userInfo)
}
// package the kafka runtime together
if !gio.DirExists(this.kafkaLibDir()) {
this.installKafka()
}
// bin
writeFileFromTemplate("template/bin/kafka-topics.sh",
fmt.Sprintf("%s/bin/kafka-topics.sh", this.instanceDir()), 0755, nil, this.userInfo)
writeFileFromTemplate("template/bin/kafka-reassign-partitions.sh",
fmt.Sprintf("%s/bin/kafka-reassign-partitions.sh", this.instanceDir()), 0755, nil, this.userInfo)
writeFileFromTemplate("template/bin/kafka-preferred-replica-election.sh",
fmt.Sprintf("%s/bin/kafka-preferred-replica-election.sh", this.instanceDir()), 0755, nil, this.userInfo)
writeFileFromTemplate("template/bin/kafka-run-class.sh",
fmt.Sprintf("%s/bin/kafka-run-class.sh", this.instanceDir()), 0755, data, this.userInfo)
writeFileFromTemplate("template/bin/kafka-server-start.sh",
fmt.Sprintf("%s/bin/kafka-server-start.sh", this.instanceDir()), 0755, data, this.userInfo)
writeFileFromTemplate("template/bin/setenv.sh",
fmt.Sprintf("%s/bin/setenv.sh", this.instanceDir()), 0755, data, this.userInfo)
// /etc/init.d/
writeFileFromTemplate("template/init.d/kafka",
fmt.Sprintf("/etc/init.d/%s", this.clusterName()), 0755, data, nil)
// config
writeFileFromTemplate("template/config/server.properties",
fmt.Sprintf("%s/config/server.properties", this.instanceDir()), 0644, data, this.userInfo)
writeFileFromTemplate("template/config/log4j.properties",
fmt.Sprintf("%s/config/log4j.properties", this.instanceDir()), 0644, data, this.userInfo)
this.Ui.Warn(fmt.Sprintf("NOW, please run the following command:"))
this.Ui.Output(color.Red("confirm log.retention.hours"))
this.Ui.Output(color.Red("chkconfig --add %s", this.clusterName()))
this.Ui.Output(color.Red("/etc/init.d/%s start", this.clusterName()))
return
}
func (this *Start) main() {
ctx.LoadFromHome()
// TODO zk session timeout
err := etclib.Dial(strings.Split(ctx.ZoneZkAddrs(this.zone), ","))
swalllow(err)
root := zkr.Root(this.zone)
ch := make(chan []string, 10)
go etclib.WatchChildren(root, ch)
var servers = BackendServers{
CpuNum: ctx.NumCPU(),
HaproxyRoot: this.root,
ForwardFor: this.forwardFor,
PubPort: this.pubPort,
SubPort: this.subPort,
ManPort: this.manPort,
}
var lastInstances []string
for {
select {
case <-this.quitCh:
time.Sleep(time.Second) // FIXME just wait log flush
return
case <-ch:
kwInstances, err := etclib.Children(root)
if err != nil {
log.Error("%s: %v", root, err)
continue
}
log.Info("kateway ids: %+v -> %+v", lastInstances, kwInstances)
lastInstances = kwInstances
servers.reset()
for _, kwId := range kwInstances {
kwNode := fmt.Sprintf("%s/%s", root, kwId)
data, err := etclib.Get(kwNode)
if err != nil {
log.Error("%s: %v", kwNode, err)
continue
}
info := make(map[string]string)
if err = json.Unmarshal([]byte(data), &info); err != nil {
log.Error("%s: %v", data, err)
continue
}
// pub
if info["pub"] != "" {
be := Backend{
Name: "p" + info["id"],
Addr: info["pub"],
Cpu: info["cpu"],
}
servers.Pub = append(servers.Pub, be)
}
// sub
if info["sub"] != "" {
be := Backend{
Name: "s" + info["id"],
Addr: info["sub"],
Cpu: info["cpu"],
}
servers.Sub = append(servers.Sub, be)
}
// man
if info["man"] != "" {
be := Backend{
Name: "m" + info["id"],
Addr: info["man"],
Cpu: info["cpu"],
}
servers.Man = append(servers.Man, be)
}
}
if err = this.createConfigFile(servers); err != nil {
log.Error(err)
continue
}
if err = this.reloadHAproxy(); err != nil {
log.Error("reloading haproxy: %v", err)
panic(err)
}
}
}
}
