minio/cmd/gateway-main.go
Harshavardhana 0e02328c98 Migrate config.json from config-dir to backend (#6195)
This PR is the first set of changes to move the config
to the backend, the changes use the existing `config.json`
allows it to be migrated such that we can save it in on
backend disks.

In future releases, we will slowly migrate out of the
current architecture.

Fixes #6182
2018-08-15 10:11:47 +05:30

255 lines
7.0 KiB
Go

/*
* 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 (
"context"
"fmt"
"net/url"
"os"
"os/signal"
"runtime"
"strings"
"syscall"
"github.com/gorilla/mux"
"github.com/minio/cli"
xhttp "github.com/minio/minio/cmd/http"
"github.com/minio/minio/cmd/logger"
"github.com/minio/minio/pkg/certs"
)
func init() {
logger.Init(GOPATH, GOROOT)
logger.RegisterUIError(fmtError)
}
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 {
logger.FatalIf(errUnexpected, "Gateway implementation not initialized")
}
// Disable logging until gateway initialization is complete, any
// error during initialization will be shown as a fatal message
logger.Disable = true
// 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 {
logger.EnableJSON()
}
// Get quiet flag from command line argument.
quietFlag := ctx.IsSet("quiet") || ctx.GlobalIsSet("quiet")
if quietFlag {
logger.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 {
logger.Fatal(uiErrEnvCredentialsMissingGateway(nil), "Unable to start gateway")
}
// Create certs path.
logger.FatalIf(createConfigDir(), "Unable to create configuration directories")
// Initialize server config.
srvCfg := newServerConfig()
// Override any values from ENVs.
srvCfg.loadFromEnvs()
// Load values to cached global values.
srvCfg.loadToCachedConfigs()
// hold the mutex lock before a new config is assigned.
globalServerConfigMu.Lock()
globalServerConfig = srvCfg
globalServerConfigMu.Unlock()
// Check and load SSL certificates.
var err error
globalPublicCerts, globalRootCAs, globalTLSCerts, globalIsSSL, err = getSSLConfig()
logger.FatalIf(err, "Invalid SSL certificate file")
// Set system resources to maximum.
logger.LogIf(context.Background(), setMaxResources())
initNSLock(false) // Enable local namespace lock.
// Create new notification system.
globalNotificationSys = NewNotificationSys(globalServerConfig, EndpointList{})
// Create new policy system.
globalPolicySys = NewPolicySys()
router := mux.NewRouter().SkipClean(true)
// Add healthcheck router
registerHealthCheckRouter(router)
// Add server metrics router
registerMetricsRouter(router)
// Register web router when its enabled.
if globalIsBrowserEnabled {
logger.FatalIf(registerWebRouter(router), "Unable to configure web browser")
}
// Add API router.
registerAPIRouter(router)
var getCert certs.GetCertificateFunc
if globalTLSCerts != nil {
getCert = globalTLSCerts.GetCertificate
}
globalHTTPServer = xhttp.NewServer([]string{gatewayAddr}, criticalErrorHandler{registerHandlers(router, globalHandlers...)}, getCert)
globalHTTPServer.UpdateBytesReadFunc = globalConnStats.incInputBytes
globalHTTPServer.UpdateBytesWrittenFunc = globalConnStats.incOutputBytes
go func() {
globalHTTPServerErrorCh <- globalHTTPServer.Start()
}()
signal.Notify(globalOSSignalCh, os.Interrupt, syscall.SIGTERM)
newObject, err := gw.NewGatewayLayer(globalServerConfig.GetCredential())
if err != nil {
// Stop watching for any certificate changes.
globalTLSCerts.Stop()
globalHTTPServer.Shutdown()
logger.FatalIf(err, "Unable to initialize gateway backend")
}
go globalPolicySys.Init(newObject)
// 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() {
logger.StartupMessage(colorYellow(" *** Warning: Not Ready for Production ***"))
}
// Print gateway startup message.
printGatewayStartupMessage(getAPIEndpoints(gatewayAddr), gatewayName)
}
// Reenable logging
logger.Disable = false
handleSignals()
}