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/*
* Minio Cloud Storage, (C) 2017, 2018 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cmd
import (
"fmt"
"net/url"
"os"
"os/signal"
"runtime"
"strings"
"syscall"
"github.com/gorilla/mux"
"github.com/minio/cli"
"github.com/minio/minio/pkg/errors"
miniohttp "github.com/minio/minio/pkg/http"
)
var (
gatewayCmd = cli.Command{
Name: "gateway",
Usage: "Start object storage gateway.",
Flags: append(serverFlags, globalFlags...),
HideHelpCommand: true,
}
)
// RegisterGatewayCommand registers a new command for gateway.
func RegisterGatewayCommand(cmd cli.Command) error {
cmd.Flags = append(append(cmd.Flags, append(cmd.Flags, serverFlags...)...), globalFlags...)
gatewayCmd.Subcommands = append(gatewayCmd.Subcommands, cmd)
return nil
}
// ParseGatewayEndpoint - Return endpoint.
func ParseGatewayEndpoint(arg string) (endPoint string, secure bool, err error) {
schemeSpecified := len(strings.Split(arg, "://")) > 1
if !schemeSpecified {
// Default connection will be "secure".
arg = "https://" + arg
}
u, err := url.Parse(arg)
if err != nil {
return "", false, err
}
switch u.Scheme {
case "http":
return u.Host, false, nil
case "https":
return u.Host, true, nil
default:
return "", false, fmt.Errorf("Unrecognized scheme %s", u.Scheme)
}
}
// ValidateGatewayArguments - Validate gateway arguments.
func ValidateGatewayArguments(serverAddr, endpointAddr string) error {
if err := CheckLocalServerAddr(serverAddr); err != nil {
return err
}
if runtime.GOOS == "darwin" {
_, port := mustSplitHostPort(serverAddr)
// On macOS, if a process already listens on LOCALIPADDR:PORT, net.Listen() falls back
// to IPv6 address i.e minio will start listening on IPv6 address whereas another
// (non-)minio process is listening on IPv4 of given port.
// To avoid this error situation we check for port availability only for macOS.
if err := checkPortAvailability(port); err != nil {
return err
}
}
if endpointAddr != "" {
// Reject the endpoint if it points to the gateway handler itself.
sameTarget, err := sameLocalAddrs(endpointAddr, serverAddr)
if err != nil {
return err
}
if sameTarget {
return fmt.Errorf("endpoint points to the local gateway")
}
}
return nil
}
// StartGateway - handler for 'minio gateway <name>'.
func StartGateway(ctx *cli.Context, gw Gateway) {
if gw == nil {
fatalIf(errUnexpected, "Gateway implementation not initialized, exiting.")
}
// Validate if we have access, secret set through environment.
gatewayName := gw.Name()
if ctx.Args().First() == "help" {
cli.ShowCommandHelpAndExit(ctx, gatewayName, 1)
}
// Get "json" flag from command line argument and
// enable json and quite modes if jason flag is turned on.
jsonFlag := ctx.IsSet("json") || ctx.GlobalIsSet("json")
if jsonFlag {
log.EnableJSON()
}
// Get quiet flag from command line argument.
quietFlag := ctx.IsSet("quiet") || ctx.GlobalIsSet("quiet")
if quietFlag {
log.EnableQuiet()
}
// Fetch address option
gatewayAddr := ctx.GlobalString("address")
if gatewayAddr == ":"+globalMinioPort {
gatewayAddr = ctx.String("address")
}
// Handle common command args.
handleCommonCmdArgs(ctx)
// Handle common env vars.
handleCommonEnvVars()
// Validate if we have access, secret set through environment.
if !globalIsEnvCreds {
errorIf(fmt.Errorf("Access and secret keys not set"), "Access and Secret keys should be set through ENVs for backend [%s]", gatewayName)
cli.ShowCommandHelpAndExit(ctx, gatewayName, 1)
}
// Create certs path.
fatalIf(createConfigDir(), "Unable to create configuration directories.")
// Initialize gateway config.
initConfig()
// Init the error tracing module.
errors.Init(GOPATH, "github.com/minio/minio")
// Check and load SSL certificates.
var err error
globalPublicCerts, globalRootCAs, globalTLSCertificate, globalIsSSL, err = getSSLConfig()
fatalIf(err, "Invalid SSL certificate file")
// Set system resources to maximum.
errorIf(setMaxResources(), "Unable to change resource limit")
initNSLock(false) // Enable local namespace lock.
// Initialize notification system.
globalNotificationSys, err = NewNotificationSys(globalServerConfig, EndpointList{})
fatalIf(err, "Unable to initialize notification system.")
newObject, err := gw.NewGatewayLayer(globalServerConfig.GetCredential())
fatalIf(err, "Unable to initialize gateway layer")
router := mux.NewRouter().SkipClean(true)
// Register web router when its enabled.
if globalIsBrowserEnabled {
fatalIf(registerWebRouter(router), "Unable to configure web browser")
}
registerAPIRouter(router)
var handlerFns = []HandlerFunc{
// Validate all the incoming paths.
setPathValidityHandler,
// Limits all requests size to a maximum fixed limit
setRequestSizeLimitHandler,
// Adds 'crossdomain.xml' policy handler to serve legacy flash clients.
setCrossDomainPolicy,
// Validates all incoming requests to have a valid date header.
// Redirect some pre-defined browser request paths to a static location prefix.
setBrowserRedirectHandler,
// Validates if incoming request is for restricted buckets.
setReservedBucketHandler,
// Adds cache control for all browser requests.
setBrowserCacheControlHandler,
// Validates all incoming requests to have a valid date header.
setTimeValidityHandler,
// CORS setting for all browser API requests.
setCorsHandler,
// Validates all incoming URL resources, for invalid/unsupported
// resources client receives a HTTP error.
setIgnoreResourcesHandler,
// Auth handler verifies incoming authorization headers and
// routes them accordingly. Client receives a HTTP error for
// invalid/unsupported signatures.
setAuthHandler,
// Add new handlers here.
}
globalHTTPServer = miniohttp.NewServer([]string{gatewayAddr}, registerHandlers(router, handlerFns...), globalTLSCertificate)
// Start server, automatically configures TLS if certs are available.
go func() {
globalHTTPServerErrorCh <- globalHTTPServer.Start()
}()
signal.Notify(globalOSSignalCh, os.Interrupt, syscall.SIGTERM)
// Once endpoints are finalized, initialize the new object api.
globalObjLayerMutex.Lock()
globalObjectAPI = newObject
globalObjLayerMutex.Unlock()
// Prints the formatted startup message once object layer is initialized.
if !quietFlag {
mode := globalMinioModeGatewayPrefix + gatewayName
// Check update mode.
checkUpdate(mode)
// Print a warning message if gateway is not ready for production before the startup banner.
if !gw.Production() {
log.Println(colorYellow("\n *** Warning: Not Ready for Production ***"))
}
// Print gateway startup message.
printGatewayStartupMessage(getAPIEndpoints(gatewayAddr), gatewayName)
}
handleSignals()
}