func init() {
flCa = flag.String([]string{"-tlscacert"}, filepath.Join(dockerConfDir, defaultCaFile), "Trust only remotes providing a certificate signed by the CA given here")
flCert = flag.String([]string{"-tlscert"}, filepath.Join(dockerConfDir, defaultCertFile), "Path to TLS certificate file")
flKey = flag.String([]string{"-tlskey"}, filepath.Join(dockerConfDir, defaultKeyFile), "Path to TLS key file")
flag.Var(&flDns, []string{"#dns", "-dns"}, "Force Docker to use specific DNS servers")
flag.Var(&flDnsSearch, []string{"-dns-search"}, "Force Docker to use specific DNS search domains")
flag.Var(&flHosts, []string{"H", "-host"}, "The socket(s) to bind to in daemon mode\nspecified using one or more tcp://host:port, unix:///path/to/socket, fd://* or fd://socketfd.")
flag.Var(&flGraphOpts, []string{"-storage-opt"}, "Set storage driver options")
}
func main() {
ignoreIfaceNames := make(stringList)
mflag.Var(&ignoreIfaceNames, []string{"-ignore-iface"}, "name of interface to ignore)")
mflag.Parse()
if len(mflag.Args()) < 1 {
fmt.Fprintln(os.Stderr, "usage: netcheck [--ignore-iface <iface-name>] network-cidr")
os.Exit(1)
}
cidrStr := mflag.Args()[0]
addr, ipnet, err := net.ParseCIDR(cidrStr)
if err != nil {
fatal(err)
}
if ipnet.IP.Equal(addr) {
err = weavenet.CheckNetworkFree(ipnet, ignoreIfaceNames)
} else {
err = weavenet.CheckAddressOverlap(addr, ignoreIfaceNames)
}
if err != nil {
fatal(err)
}
os.Exit(0)
}
func init() {
flag.BoolVar(&help, []string{"h", "-help"}, false, "Display help")
flag.BoolVar(&verbose, []string{"v", "-verbose"}, false, "Switch to verbose output")
flag.Var(&keys, []string{"k", "-key-file"}, "Private key with which to sign")
flag.Parse()
if kk := flag.Lookup("-k"); kk != nil {
keys = *kk.Value.(*opts.ListOpts)
}
}
func IPVar(value *net.IP, names []string, defaultValue, usage string) {
flag.Var(NewIpOpt(value, defaultValue), names, usage)
}
func DnsSearchListVar(values *[]string, names []string, usage string) {
flag.Var(newListOptsRef(values, ValidateDnsSearch), names, usage)
}
func IPListVar(values *[]string, names []string, usage string) {
flag.Var(newListOptsRef(values, ValidateIPAddress), names, usage)
}
func HostListVar(values *[]string, names []string, usage string) {
flag.Var(newListOptsRef(values, ValidateHost), names, usage)
}
func ListVar(values *[]string, names []string, usage string) {
flag.Var(newListOptsRef(values, nil), names, usage)
}
// InstallFlags adds command-line options to the top-level flag parser for
// the current process.
func (options *Options) InstallFlags() {
options.Mirrors = opts.NewListOpts(ValidateMirror)
flag.Var(&options.Mirrors, []string{"-registry-mirror"}, "Preferred Docker registry mirror")
options.InsecureRegistries = opts.NewListOpts(ValidateIndexName)
flag.Var(&options.InsecureRegistries, []string{"-insecure-registry"}, "Enable insecure registry communication")
}
func LogOptsVar(values map[string]string, names []string, usage string) {
flag.Var(newMapOpt(values, ValidateLogOpts), names, usage)
}
// InstallFlags adds command-line options to the top-level flag parser for
// the current process.
func (options *Options) InstallFlags() {
options.Mirrors = opts.NewListOpts(ValidateMirror)
flag.Var(&options.Mirrors, []string{"-registry-mirror"}, "Specify a preferred Docker registry mirror")
options.InsecureRegistries = opts.NewListOpts(ValidateIndexName)
flag.Var(&options.InsecureRegistries, []string{"-insecure-registry"}, "Enable insecure communication with specified registries (no certificate verification for HTTPS and enable HTTP fallback) (e.g., localhost:5000 or 10.20.0.0/16)")
}
func MirrorListVar(values *[]string, names []string, usage string) {
flag.Var(newListOptsRef(values, ValidateMirror), names, usage)
}
// LogOptsVar Defines a flag with the specified names and usage for --log-opts,
// and put the value map into MapOpt that will hold the values (key,value).
func LogOptsVar(values map[string]string, names []string, usage string) {
flag.Var(NewMapOpts(values, nil), names, usage)
}
func MapVar(values map[string]string, names []string, usage string) {
flag.Var(newMapOpt(values, nil), names, usage)
}
func main() {
if len(dockerConfDir) == 0 {
dockerConfDir = filepath.Join(os.Getenv("HOME"), ".docker")
}
if selfPath := utils.SelfPath(); strings.Contains(selfPath, ".dockerinit") {
// Running in init mode
sysinit.SysInit()
return
}
var (
flVersion = flag.Bool([]string{"v", "-version"}, false, "Print version information and quit")
flDaemon = flag.Bool([]string{"d", "-daemon"}, false, "Enable daemon mode")
flGraphOpts opts.ListOpts
flDebug = flag.Bool([]string{"D", "-debug"}, false, "Enable debug mode")
flAutoRestart = flag.Bool([]string{"r", "-restart"}, true, "Restart previously running containers")
bridgeName = flag.String([]string{"b", "-bridge"}, "", "Attach containers to a pre-existing network bridge\nuse 'none' to disable container networking")
bridgeIp = flag.String([]string{"#bip", "-bip"}, "", "Use this CIDR notation address for the network bridge's IP, not compatible with -b")
pidfile = flag.String([]string{"p", "-pidfile"}, "/var/run/docker.pid", "Path to use for daemon PID file")
flRoot = flag.String([]string{"g", "-graph"}, "/var/lib/docker", "Path to use as the root of the Docker runtime")
flSocketGroup = flag.String([]string{"G", "-group"}, "docker", "Group to assign the unix socket specified by -H when running in daemon mode\nuse '' (the empty string) to disable setting of a group")
flEnableCors = flag.Bool([]string{"#api-enable-cors", "-api-enable-cors"}, false, "Enable CORS headers in the remote API")
flDns = opts.NewListOpts(opts.ValidateIPAddress)
flDnsSearch = opts.NewListOpts(opts.ValidateDnsSearch)
flEnableIptables = flag.Bool([]string{"#iptables", "-iptables"}, true, "Enable Docker's addition of iptables rules")
flEnableIpForward = flag.Bool([]string{"#ip-forward", "-ip-forward"}, true, "Enable net.ipv4.ip_forward")
flDefaultIp = flag.String([]string{"#ip", "-ip"}, "0.0.0.0", "Default IP address to use when binding container ports")
flInterContainerComm = flag.Bool([]string{"#icc", "-icc"}, true, "Enable inter-container communication")
flGraphDriver = flag.String([]string{"s", "-storage-driver"}, "", "Force the Docker runtime to use a specific storage driver")
flExecDriver = flag.String([]string{"e", "-exec-driver"}, "native", "Force the Docker runtime to use a specific exec driver")
flHosts = opts.NewListOpts(api.ValidateHost)
flMtu = flag.Int([]string{"#mtu", "-mtu"}, 0, "Set the containers network MTU\nif no value is provided: default to the default route MTU or 1500 if no default route is available")
flTls = flag.Bool([]string{"-tls"}, false, "Use TLS; implied by tls-verify flags")
flTlsVerify = flag.Bool([]string{"-tlsverify"}, false, "Use TLS and verify the remote (daemon: verify client, client: verify daemon)")
flCa = flag.String([]string{"-tlscacert"}, filepath.Join(dockerConfDir, defaultCaFile), "Trust only remotes providing a certificate signed by the CA given here")
flCert = flag.String([]string{"-tlscert"}, filepath.Join(dockerConfDir, defaultCertFile), "Path to TLS certificate file")
flKey = flag.String([]string{"-tlskey"}, filepath.Join(dockerConfDir, defaultKeyFile), "Path to TLS key file")
flSelinuxEnabled = flag.Bool([]string{"-selinux-enabled"}, false, "Enable selinux support. SELinux does not presently support the BTRFS storage driver")
)
flag.Var(&flDns, []string{"#dns", "-dns"}, "Force Docker to use specific DNS servers")
flag.Var(&flDnsSearch, []string{"-dns-search"}, "Force Docker to use specific DNS search domains")
flag.Var(&flHosts, []string{"H", "-host"}, "The socket(s) to bind to in daemon mode\nspecified using one or more tcp://host:port, unix:///path/to/socket, fd://* or fd://socketfd.")
flag.Var(&flGraphOpts, []string{"-storage-opt"}, "Set storage driver options")
flag.Parse()
if *flVersion {
showVersion()
return
}
if flHosts.Len() == 0 {
defaultHost := os.Getenv("DOCKER_HOST")
if defaultHost == "" || *flDaemon {
// If we do not have a host, default to unix socket
defaultHost = fmt.Sprintf("unix://%s", api.DEFAULTUNIXSOCKET)
}
if _, err := api.ValidateHost(defaultHost); err != nil {
log.Fatal(err)
}
flHosts.Set(defaultHost)
}
if *bridgeName != "" && *bridgeIp != "" {
log.Fatal("You specified -b & --bip, mutually exclusive options. Please specify only one.")
}
if !*flEnableIptables && !*flInterContainerComm {
log.Fatal("You specified --iptables=false with --icc=false. ICC uses iptables to function. Please set --icc or --iptables to true.")
}
if net.ParseIP(*flDefaultIp) == nil {
log.Fatalf("Specified --ip=%s is not in correct format \"0.0.0.0\".", *flDefaultIp)
}
if *flDebug {
os.Setenv("DEBUG", "1")
}
if *flDaemon {
if runtime.GOOS != "linux" {
log.Fatalf("The Docker daemon is only supported on linux")
}
if os.Geteuid() != 0 {
log.Fatalf("The Docker daemon needs to be run as root")
}
if flag.NArg() != 0 {
flag.Usage()
return
}
// set up the TempDir to use a canonical path
tmp := os.TempDir()
realTmp, err := utils.ReadSymlinkedDirectory(tmp)
if err != nil {
log.Fatalf("Unable to get the full path to the TempDir (%s): %s", tmp, err)
}
os.Setenv("TMPDIR", realTmp)
// get the canonical path to the Docker root directory
root := *flRoot
var realRoot string
if _, err := os.Stat(root); err != nil && os.IsNotExist(err) {
realRoot = root
} else {
realRoot, err = utils.ReadSymlinkedDirectory(root)
if err != nil {
log.Fatalf("Unable to get the full path to root (%s): %s", root, err)
}
}
if err := checkKernelAndArch(); err != nil {
log.Fatal(err)
}
eng := engine.New()
// Load builtins
if err := builtins.Register(eng); err != nil {
log.Fatal(err)
}
// handle the pidfile early. https://github.com/docker/docker/issues/6973
if len(*pidfile) > 0 {
job := eng.Job("initserverpidfile", *pidfile)
if err := job.Run(); err != nil {
log.Fatal(err)
}
}
// load the daemon in the background so we can immediately start
// the http api so that connections don't fail while the daemon
// is booting
go func() {
// Load plugin: httpapi
job := eng.Job("initserver")
// include the variable here too, for the server config
job.Setenv("Pidfile", *pidfile)
job.Setenv("Root", realRoot)
job.SetenvBool("AutoRestart", *flAutoRestart)
job.SetenvList("Dns", flDns.GetAll())
job.SetenvList("DnsSearch", flDnsSearch.GetAll())
job.SetenvBool("EnableIptables", *flEnableIptables)
job.SetenvBool("EnableIpForward", *flEnableIpForward)
job.Setenv("BridgeIface", *bridgeName)
job.Setenv("BridgeIP", *bridgeIp)
job.Setenv("DefaultIp", *flDefaultIp)
job.SetenvBool("InterContainerCommunication", *flInterContainerComm)
job.Setenv("GraphDriver", *flGraphDriver)
job.SetenvList("GraphOptions", flGraphOpts.GetAll())
job.Setenv("ExecDriver", *flExecDriver)
job.SetenvInt("Mtu", *flMtu)
job.SetenvBool("EnableSelinuxSupport", *flSelinuxEnabled)
job.SetenvList("Sockets", flHosts.GetAll())
if err := job.Run(); err != nil {
log.Fatal(err)
}
// after the daemon is done setting up we can tell the api to start
// accepting connections
if err := eng.Job("acceptconnections").Run(); err != nil {
log.Fatal(err)
}
}()
// TODO actually have a resolved graphdriver to show?
log.Printf("docker daemon: %s %s; execdriver: %s; graphdriver: %s",
dockerversion.VERSION,
dockerversion.GITCOMMIT,
*flExecDriver,
*flGraphDriver)
// Serve api
job := eng.Job("serveapi", flHosts.GetAll()...)
job.SetenvBool("Logging", true)
job.SetenvBool("EnableCors", *flEnableCors)
job.Setenv("Version", dockerversion.VERSION)
job.Setenv("SocketGroup", *flSocketGroup)
job.SetenvBool("Tls", *flTls)
job.SetenvBool("TlsVerify", *flTlsVerify)
job.Setenv("TlsCa", *flCa)
job.Setenv("TlsCert", *flCert)
job.Setenv("TlsKey", *flKey)
job.SetenvBool("BufferRequests", true)
if err := job.Run(); err != nil {
log.Fatal(err)
}
} else {
if flHosts.Len() > 1 {
log.Fatal("Please specify only one -H")
}
protoAddrParts := strings.SplitN(flHosts.GetAll()[0], "://", 2)
var (
cli *client.DockerCli
tlsConfig tls.Config
)
tlsConfig.InsecureSkipVerify = true
// If we should verify the server, we need to load a trusted ca
if *flTlsVerify {
*flTls = true
certPool := x509.NewCertPool()
file, err := ioutil.ReadFile(*flCa)
if err != nil {
log.Fatalf("Couldn't read ca cert %s: %s", *flCa, err)
}
certPool.AppendCertsFromPEM(file)
tlsConfig.RootCAs = certPool
tlsConfig.InsecureSkipVerify = false
}
// If tls is enabled, try to load and send client certificates
if *flTls || *flTlsVerify {
_, errCert := os.Stat(*flCert)
_, errKey := os.Stat(*flKey)
if errCert == nil && errKey == nil {
*flTls = true
cert, err := tls.LoadX509KeyPair(*flCert, *flKey)
if err != nil {
log.Fatalf("Couldn't load X509 key pair: %s. Key encrypted?", err)
}
tlsConfig.Certificates = []tls.Certificate{cert}
}
}
if *flTls || *flTlsVerify {
cli = client.NewDockerCli(os.Stdin, os.Stdout, os.Stderr, protoAddrParts[0], protoAddrParts[1], &tlsConfig)
} else {
cli = client.NewDockerCli(os.Stdin, os.Stdout, os.Stderr, protoAddrParts[0], protoAddrParts[1], nil)
}
if err := cli.ParseCommands(flag.Args()...); err != nil {
if sterr, ok := err.(*utils.StatusError); ok {
if sterr.Status != "" {
log.Println(sterr.Status)
}
os.Exit(sterr.StatusCode)
}
log.Fatal(err)
}
}
}
func LabelListVar(values *[]string, names []string, usage string) {
flag.Var(newListOptsRef(values, ValidateLabel), names, usage)
}
func UlimitMapVar(values map[string]*ulimit.Ulimit, names []string, usage string) {
flag.Var(NewUlimitOpt(values), names, usage)
}
func ListVar(p *[]string, names []string, value []string, usage string) {
*p = value
mflag.Var(&listOpts{p, false}, names, usage)
}