func main() {
procs := runtime.NumCPU()
// packet sniffing can block an OS thread, so we need one thread
// for that plus at least one more.
if procs < 2 {
procs = 2
}
runtime.GOMAXPROCS(procs)
var (
config weave.Config
justVersion bool
protocolMinVersion int
ifaceName string
routerName string
nickName string
password string
wait int
pktdebug bool
logLevel string
prof string
bufSzMB int
noDiscovery bool
httpAddr string
iprangeCIDR string
ipsubnetCIDR string
peerCount int
apiPath string
peers []string
noDNS bool
dnsDomain string
dnsPort int
dnsTTL int
dnsClientTimeout time.Duration
)
mflag.BoolVar(&justVersion, []string{"#version", "-version"}, false, "print version and exit")
mflag.IntVar(&config.Port, []string{"#port", "-port"}, weave.Port, "router port")
mflag.IntVar(&protocolMinVersion, []string{"-min-protocol-version"}, weave.ProtocolMinVersion, "minimum weave protocol version")
mflag.StringVar(&ifaceName, []string{"#iface", "-iface"}, "", "name of interface to capture/inject from (disabled if blank)")
mflag.StringVar(&routerName, []string{"#name", "-name"}, "", "name of router (defaults to MAC of interface)")
mflag.StringVar(&nickName, []string{"#nickname", "-nickname"}, "", "nickname of peer (defaults to hostname)")
mflag.StringVar(&password, []string{"#password", "-password"}, "", "network password")
mflag.IntVar(&wait, []string{"#wait", "-wait"}, -1, "number of seconds to wait for interface to come up (0=don't wait, -1=wait forever)")
mflag.StringVar(&logLevel, []string{"-log-level"}, "info", "logging level (debug, info, warning, error)")
mflag.BoolVar(&pktdebug, []string{"#pktdebug", "#-pktdebug", "-pkt-debug"}, false, "enable per-packet debug logging")
mflag.StringVar(&prof, []string{"#profile", "-profile"}, "", "enable profiling and write profiles to given path")
mflag.IntVar(&config.ConnLimit, []string{"#connlimit", "#-connlimit", "-conn-limit"}, 30, "connection limit (0 for unlimited)")
mflag.BoolVar(&noDiscovery, []string{"#nodiscovery", "#-nodiscovery", "-no-discovery"}, false, "disable peer discovery")
mflag.IntVar(&bufSzMB, []string{"#bufsz", "-bufsz"}, 8, "capture buffer size in MB")
mflag.StringVar(&httpAddr, []string{"#httpaddr", "#-httpaddr", "-http-addr"}, fmt.Sprintf(":%d", weave.HTTPPort), "address to bind HTTP interface to (disabled if blank, absolute path indicates unix domain socket)")
mflag.StringVar(&iprangeCIDR, []string{"#iprange", "#-iprange", "-ipalloc-range"}, "", "IP address range reserved for automatic allocation, in CIDR notation")
mflag.StringVar(&ipsubnetCIDR, []string{"#ipsubnet", "#-ipsubnet", "-ipalloc-default-subnet"}, "", "subnet to allocate within by default, in CIDR notation")
mflag.IntVar(&peerCount, []string{"#initpeercount", "#-initpeercount", "-init-peer-count"}, 0, "number of peers in network (for IP address allocation)")
mflag.StringVar(&apiPath, []string{"#api", "-api"}, "unix:///var/run/docker.sock", "Path to Docker API socket")
mflag.BoolVar(&noDNS, []string{"-no-dns"}, false, "disable DNS server")
mflag.StringVar(&dnsDomain, []string{"-dns-domain"}, nameserver.DefaultDomain, "local domain to server requests for")
mflag.IntVar(&dnsPort, []string{"-dns-port"}, nameserver.DefaultPort, "port to listen on for DNS requests")
mflag.IntVar(&dnsTTL, []string{"-dns-ttl"}, nameserver.DefaultTTL, "TTL for DNS request from our domain")
mflag.DurationVar(&dnsClientTimeout, []string{"-dns-fallback-timeout"}, nameserver.DefaultClientTimeout, "timeout for fallback DNS requests")
mflag.Parse()
peers = mflag.Args()
SetLogLevel(logLevel)
if justVersion {
fmt.Printf("weave router %s\n", version)
os.Exit(0)
}
Log.Println("Command line options:", options())
Log.Println("Command line peers:", peers)
if protocolMinVersion < weave.ProtocolMinVersion || protocolMinVersion > weave.ProtocolMaxVersion {
Log.Fatalf("--min-protocol-version must be in range [%d,%d]", weave.ProtocolMinVersion, weave.ProtocolMaxVersion)
}
config.ProtocolMinVersion = byte(protocolMinVersion)
var err error
if ifaceName != "" {
config.Iface, err = weavenet.EnsureInterface(ifaceName, wait)
if err != nil {
Log.Fatal(err)
}
}
if routerName == "" {
if config.Iface == nil {
Log.Fatal("Either an interface must be specified with --iface or a name with -name")
}
routerName = config.Iface.HardwareAddr.String()
}
name, err := weave.PeerNameFromUserInput(routerName)
if err != nil {
Log.Fatal(err)
}
if nickName == "" {
nickName, err = os.Hostname()
if err != nil {
Log.Fatal(err)
}
}
if password == "" {
password = os.Getenv("WEAVE_PASSWORD")
}
if password == "" {
Log.Println("Communication between peers is unencrypted.")
} else {
config.Password = []byte(password)
Log.Println("Communication between peers is encrypted.")
}
if prof != "" {
p := *profile.CPUProfile
p.ProfilePath = prof
p.NoShutdownHook = true
defer profile.Start(&p).Stop()
}
config.BufSz = bufSzMB * 1024 * 1024
config.LogFrame = logFrameFunc(pktdebug)
config.PeerDiscovery = !noDiscovery
router := weave.NewRouter(config, name, nickName)
Log.Println("Our name is", router.Ourself)
dockerCli, err := docker.NewClient(apiPath)
if err != nil {
Log.Fatal("Unable to start docker client: ", err)
}
var allocator *ipam.Allocator
var defaultSubnet address.CIDR
if iprangeCIDR != "" {
allocator, defaultSubnet = createAllocator(router, iprangeCIDR, ipsubnetCIDR, determineQuorum(peerCount, peers))
if err = dockerCli.AddObserver(allocator); err != nil {
Log.Fatal("Unable to start watcher", err)
}
} else if peerCount > 0 {
Log.Fatal("--init-peer-count flag specified without --ipalloc-range")
}
var (
ns *nameserver.Nameserver
dnsserver *nameserver.DNSServer
)
if !noDNS {
ns = nameserver.New(router.Ourself.Peer.Name, router.Peers, dockerCli, dnsDomain)
ns.SetGossip(router.NewGossip("nameserver", ns))
if err = dockerCli.AddObserver(ns); err != nil {
Log.Fatal("Unable to start watcher", err)
}
ns.Start()
defer ns.Stop()
dnsserver, err = nameserver.NewDNSServer(ns, dnsDomain, dnsPort, uint32(dnsTTL), dnsClientTimeout)
if err != nil {
Log.Fatal("Unable to start dns server: ", err)
}
dnsserver.ActivateAndServe()
defer dnsserver.Stop()
}
router.Start()
if errors := router.ConnectionMaker.InitiateConnections(peers, false); len(errors) > 0 {
Log.Fatal(errorMessages(errors))
}
// The weave script always waits for a status call to succeed,
// so there is no point in doing "weave launch --http-addr ''".
// This is here to support stand-alone use of weaver.
if httpAddr != "" {
go handleHTTP(router, httpAddr, allocator, defaultSubnet, dockerCli, ns, dnsserver)
}
SignalHandlerLoop(router)
}
func main() {
procs := runtime.NumCPU()
// packet sniffing can block an OS thread, so we need one thread
// for that plus at least one more.
if procs < 2 {
procs = 2
}
runtime.GOMAXPROCS(procs)
var (
config weave.Config
justVersion bool
ifaceName string
routerName string
nickName string
password string
wait int
pktdebug bool
logLevel string
prof string
bufSzMB int
noDiscovery bool
httpAddr string
iprangeCIDR string
ipsubnetCIDR string
peerCount int
apiPath string
peers []string
)
flag.BoolVar(&justVersion, "version", false, "print version and exit")
flag.IntVar(&config.Port, "port", weave.Port, "router port")
flag.StringVar(&ifaceName, "iface", "", "name of interface to capture/inject from (disabled if blank)")
flag.StringVar(&routerName, "name", "", "name of router (defaults to MAC of interface)")
flag.StringVar(&nickName, "nickname", "", "nickname of peer (defaults to hostname)")
flag.StringVar(&password, "password", "", "network password")
flag.IntVar(&wait, "wait", -1, "number of seconds to wait for interface to come up (0=don't wait, -1=wait forever)")
flag.StringVar(&logLevel, "log-level", "info", "logging level (debug, info, warning, error)")
flag.BoolVar(&pktdebug, "pktdebug", false, "enable per-packet debug logging")
flag.StringVar(&prof, "profile", "", "enable profiling and write profiles to given path")
flag.IntVar(&config.ConnLimit, "connlimit", 30, "connection limit (0 for unlimited)")
flag.BoolVar(&noDiscovery, "nodiscovery", false, "disable peer discovery")
flag.IntVar(&bufSzMB, "bufsz", 8, "capture buffer size in MB")
flag.StringVar(&httpAddr, "httpaddr", fmt.Sprintf(":%d", weave.HTTPPort), "address to bind HTTP interface to (disabled if blank, absolute path indicates unix domain socket)")
flag.StringVar(&iprangeCIDR, "iprange", "", "IP address range reserved for automatic allocation, in CIDR notation")
flag.StringVar(&ipsubnetCIDR, "ipsubnet", "", "subnet to allocate within by default, in CIDR notation")
flag.IntVar(&peerCount, "initpeercount", 0, "number of peers in network (for IP address allocation)")
flag.StringVar(&apiPath, "api", "unix:///var/run/docker.sock", "Path to Docker API socket")
flag.Parse()
peers = flag.Args()
SetLogLevel(logLevel)
if justVersion {
fmt.Printf("weave router %s\n", version)
os.Exit(0)
}
Log.Println("Command line options:", options())
Log.Println("Command line peers:", peers)
var err error
if ifaceName != "" {
config.Iface, err = weavenet.EnsureInterface(ifaceName, wait)
if err != nil {
Log.Fatal(err)
}
}
if routerName == "" {
if config.Iface == nil {
Log.Fatal("Either an interface must be specified with -iface or a name with -name")
}
routerName = config.Iface.HardwareAddr.String()
}
name, err := weave.PeerNameFromUserInput(routerName)
if err != nil {
Log.Fatal(err)
}
if nickName == "" {
nickName, err = os.Hostname()
if err != nil {
Log.Fatal(err)
}
}
if password == "" {
password = os.Getenv("WEAVE_PASSWORD")
}
if password == "" {
Log.Println("Communication between peers is unencrypted.")
} else {
config.Password = []byte(password)
Log.Println("Communication between peers is encrypted.")
}
if prof != "" {
p := *profile.CPUProfile
p.ProfilePath = prof
p.NoShutdownHook = true
defer profile.Start(&p).Stop()
}
config.BufSz = bufSzMB * 1024 * 1024
config.LogFrame = logFrameFunc(pktdebug)
config.PeerDiscovery = !noDiscovery
router := weave.NewRouter(config, name, nickName)
Log.Println("Our name is", router.Ourself)
var allocator *ipam.Allocator
var defaultSubnet address.CIDR
var dockerCli *docker.Client
if iprangeCIDR != "" {
allocator, defaultSubnet = createAllocator(router, iprangeCIDR, ipsubnetCIDR, determineQuorum(peerCount, peers))
dockerCli, err = docker.NewClient(apiPath)
if err != nil {
Log.Fatal("Unable to start docker client: ", err)
}
if err = dockerCli.AddObserver(allocator); err != nil {
Log.Fatal("Unable to start watcher", err)
}
} else if peerCount > 0 {
Log.Fatal("-initpeercount flag specified without -iprange")
}
router.Start()
if errors := router.ConnectionMaker.InitiateConnections(peers, false); len(errors) > 0 {
Log.Fatal(errorMessages(errors))
}
// The weave script always waits for a status call to succeed,
// so there is no point in doing "weave launch -httpaddr ''".
// This is here to support stand-alone use of weaver.
if httpAddr != "" {
go handleHTTP(router, httpAddr, allocator, defaultSubnet, dockerCli)
}
SignalHandlerLoop(router)
}
