//
// Load Balance如何运维呢?
// 1. 在服务提供方，会会启动Load Balance, 它只负责本机器的某个指定服务的lb
// 2. 正常情况下，不能被轻易杀死
// 3. 需要考虑 graceful stop, 在死之前告知所有的proxy，如何告知呢? TODO
//
//
func main() {
args, err := docopt.Parse(usage, nil, true, "Chunyu RPC Load Balance v0.1", true)
if err != nil {
log.Println(err)
os.Exit(1)
}
var maxFileFrag = 2
var maxFragSize int64 = bytesize.GB * 1
if s, ok := args["--log-filesize"].(string); ok && s != "" {
v, err := bytesize.Parse(s)
if err != nil {
log.PanicErrorf(err, "invalid max log file size = %s", s)
}
maxFragSize = v
}
// set output log file
if s, ok := args["-L"].(string); ok && s != "" {
f, err := log.NewRollingFile(s, maxFileFrag, maxFragSize)
if err != nil {
log.PanicErrorf(err, "open rolling log file failed: %s", s)
} else {
defer f.Close()
log.StdLog = log.New(f, "")
}
}
log.SetLevel(log.LEVEL_INFO)
log.SetFlags(log.Flags() | log.Lshortfile)
// set log level
if s, ok := args["--log-level"].(string); ok && s != "" {
setLogLevel(s)
}
var backendAddr, frontendAddr, zkAddr, productName, serviceName string
// set config file
if args["-c"] != nil {
configFile := args["-c"].(string)
conf, err := utils.LoadConf(configFile)
if err != nil {
log.PanicErrorf(err, "load config failed")
}
productName = conf.ProductName
if conf.FrontHost == "" {
fmt.Println("FrontHost: ", conf.FrontHost, ", Prefix: ", conf.IpPrefix)
if conf.IpPrefix != "" {
conf.FrontHost = utils.GetIpWithPrefix(conf.IpPrefix)
}
}
if conf.FrontPort != "" && conf.FrontHost != "" {
frontendAddr = fmt.Sprintf("tcp://%s:%s", conf.FrontHost, conf.FrontPort)
}
backendAddr = conf.BackAddr
serviceName = conf.Service
zkAddr = conf.ZkAddr
config.VERBOSE = conf.Verbose
} else {
productName = ""
zkAddr = ""
}
if s, ok := args["--product"].(string); ok && s != "" {
productName = s
} else if productName == "" {
// 既没有config指定，也没有命令行指定，则报错
log.PanicErrorf(err, "Invalid ProductName: %s", s)
}
if s, ok := args["--zk"].(string); ok && s != "" {
zkAddr = s
} else if zkAddr == "" {
log.PanicErrorf(err, "Invalid zookeeper address: %s", s)
}
if s, ok := args["--service"].(string); ok && s != "" {
serviceName = s
} else if serviceName == "" {
log.PanicErrorf(err, "Invalid ServiceName: %s", s)
}
if s, ok := args["--baddr"].(string); ok && s != "" {
backendAddr = s
} else if backendAddr == "" {
log.PanicErrorf(err, "Invalid backend address: %s", s)
}
if s, ok := args["--faddr"].(string); ok && s != "" {
frontendAddr = s
} else if frontendAddr == "" {
//
log.PanicErrorf(err, "Invalid frontend address: %s", s)
}
// 正式的服务
mainBody(zkAddr, productName, serviceName, frontendAddr, backendAddr)
}
//
// Proxy关闭，则整个机器就OVER, 需要考虑将整个机器下线
// 因此Proxy需要设计的非常完美，不要轻易地被杀死，或自杀
//
func main() {
// 解析输入参数
args, err := docopt.Parse(usage, nil, true, "Chunyu RPC Local Proxy v0.1", true)
if err != nil {
log.Println(err)
os.Exit(1)
}
var maxFileFrag = 2
var maxFragSize int64 = bytesize.GB * 1
if s, ok := args["--log-filesize"].(string); ok && s != "" {
v, err := bytesize.Parse(s)
if err != nil {
log.PanicErrorf(err, "invalid max log file size = %s", s)
}
maxFragSize = v
}
// set output log file
if s, ok := args["-L"].(string); ok && s != "" {
f, err := log.NewRollingFile(s, maxFileFrag, maxFragSize)
if err != nil {
log.PanicErrorf(err, "open rolling log file failed: %s", s)
} else {
defer f.Close()
log.StdLog = log.New(f, "")
}
}
log.SetLevel(log.LEVEL_INFO)
log.SetFlags(log.Flags() | log.Lshortfile)
// set log level
if s, ok := args["--log-level"].(string); ok && s != "" {
setLogLevel(s)
}
var zkAddr, frontAddr, productName string
// 从config文件中读取数据
if args["-c"] != nil {
configFile := args["-c"].(string)
conf, err := utils.LoadConf(configFile)
if err != nil {
log.PanicErrorf(err, "load config failed")
}
productName = conf.ProductName
frontAddr = conf.ProxyAddr
zkAddr = conf.ZkAddr
config.VERBOSE = conf.Verbose
config.PROFILE = conf.Profile
} else {
productName = ""
zkAddr = ""
}
if s, ok := args["--product"].(string); ok && s != "" {
productName = s
} else if productName == "" {
log.PanicErrorf(err, "Invalid ProductName: %s", s)
}
if s, ok := args["--zk"].(string); ok && s != "" {
zkAddr = s
} else if zkAddr == "" {
log.PanicErrorf(err, "Invalid zookeeper address: %s", s)
}
if s, ok := args["--faddr"].(string); ok && s != "" {
frontAddr = s
} else if frontAddr == "" {
log.PanicErrorf(err, "Invalid Proxy address: %s", s)
}
// 正式的服务
mainBody(productName, frontAddr, zkAddr)
}