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510 lines
16 KiB
510 lines
16 KiB
/*
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* MinIO Cloud Storage, (C) 2015-2019 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"context"
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"errors"
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"fmt"
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"net"
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"net/http"
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"os"
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"os/signal"
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"strings"
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"syscall"
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"time"
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"github.com/minio/cli"
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"github.com/minio/minio/cmd/config"
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xhttp "github.com/minio/minio/cmd/http"
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"github.com/minio/minio/cmd/logger"
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"github.com/minio/minio/pkg/auth"
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"github.com/minio/minio/pkg/certs"
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"github.com/minio/minio/pkg/color"
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"github.com/minio/minio/pkg/env"
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)
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// ServerFlags - server command specific flags
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var ServerFlags = []cli.Flag{
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cli.StringFlag{
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Name: "address",
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Value: ":" + globalMinioDefaultPort,
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Usage: "bind to a specific ADDRESS:PORT, ADDRESS can be an IP or hostname",
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},
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}
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var serverCmd = cli.Command{
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Name: "server",
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Usage: "start object storage server",
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Flags: append(ServerFlags, GlobalFlags...),
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Action: serverMain,
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CustomHelpTemplate: `NAME:
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{{.HelpName}} - {{.Usage}}
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USAGE:
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{{.HelpName}} {{if .VisibleFlags}}[FLAGS] {{end}}DIR1 [DIR2..]
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{{.HelpName}} {{if .VisibleFlags}}[FLAGS] {{end}}DIR{1...64}
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{{.HelpName}} {{if .VisibleFlags}}[FLAGS] {{end}}DIR{1...64} DIR{65...128}
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DIR:
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DIR points to a directory on a filesystem. When you want to combine
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multiple drives into a single large system, pass one directory per
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filesystem separated by space. You may also use a '...' convention
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to abbreviate the directory arguments. Remote directories in a
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distributed setup are encoded as HTTP(s) URIs.
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{{if .VisibleFlags}}
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FLAGS:
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{{range .VisibleFlags}}{{.}}
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{{end}}{{end}}
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EXAMPLES:
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1. Start minio server on "/home/shared" directory.
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{{.Prompt}} {{.HelpName}} /home/shared
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2. Start single node server with 64 local drives "/mnt/data1" to "/mnt/data64".
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{{.Prompt}} {{.HelpName}} /mnt/data{1...64}
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3. Start distributed minio server on an 32 node setup with 32 drives each, run following command on all the nodes
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{{.Prompt}} {{.EnvVarSetCommand}} MINIO_ACCESS_KEY{{.AssignmentOperator}}minio
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{{.Prompt}} {{.EnvVarSetCommand}} MINIO_SECRET_KEY{{.AssignmentOperator}}miniostorage
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{{.Prompt}} {{.HelpName}} http://node{1...32}.example.com/mnt/export{1...32}
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4. Start distributed minio server in an expanded setup, run the following command on all the nodes
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{{.Prompt}} {{.EnvVarSetCommand}} MINIO_ACCESS_KEY{{.AssignmentOperator}}minio
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{{.Prompt}} {{.EnvVarSetCommand}} MINIO_SECRET_KEY{{.AssignmentOperator}}miniostorage
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{{.Prompt}} {{.HelpName}} http://node{1...16}.example.com/mnt/export{1...32} \
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http://node{17...64}.example.com/mnt/export{1...64}
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`,
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}
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// Checks if endpoints are either available through environment
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// or command line, returns false if both fails.
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func endpointsPresent(ctx *cli.Context) bool {
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endpoints := env.Get(config.EnvEndpoints, strings.Join(ctx.Args(), config.ValueSeparator))
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return len(endpoints) != 0
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}
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func serverHandleCmdArgs(ctx *cli.Context) {
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// Handle common command args.
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handleCommonCmdArgs(ctx)
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logger.FatalIf(CheckLocalServerAddr(globalCLIContext.Addr), "Unable to validate passed arguments")
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var setupType SetupType
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var err error
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globalMinioAddr = globalCLIContext.Addr
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globalMinioHost, globalMinioPort = mustSplitHostPort(globalMinioAddr)
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endpoints := strings.Fields(env.Get(config.EnvEndpoints, ""))
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if len(endpoints) > 0 {
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globalEndpoints, globalXLSetDriveCount, setupType, err = createServerEndpoints(globalCLIContext.Addr, endpoints...)
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} else {
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globalEndpoints, globalXLSetDriveCount, setupType, err = createServerEndpoints(globalCLIContext.Addr, ctx.Args()...)
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}
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logger.FatalIf(err, "Invalid command line arguments")
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// On macOS, if a process already listens on LOCALIPADDR:PORT, net.Listen() falls back
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// to IPv6 address ie minio will start listening on IPv6 address whereas another
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// (non-)minio process is listening on IPv4 of given port.
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// To avoid this error situation we check for port availability.
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logger.FatalIf(checkPortAvailability(globalMinioHost, globalMinioPort), "Unable to start the server")
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globalIsXL = (setupType == XLSetupType)
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globalIsDistXL = (setupType == DistXLSetupType)
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if globalIsDistXL {
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globalIsXL = true
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}
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}
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func serverHandleEnvVars() {
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// Handle common environment variables.
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handleCommonEnvVars()
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}
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func newAllSubsystems() {
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// Create new notification system and initialize notification targets
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globalNotificationSys = NewNotificationSys(globalEndpoints)
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// Create a new config system.
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globalConfigSys = NewConfigSys()
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// Create new IAM system.
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globalIAMSys = NewIAMSys()
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// Create new policy system.
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globalPolicySys = NewPolicySys()
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// Create new lifecycle system.
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globalLifecycleSys = NewLifecycleSys()
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// Create new bucket encryption subsystem
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globalBucketSSEConfigSys = NewBucketSSEConfigSys()
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// Create new bucket quota subsystem
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globalBucketQuotaSys = NewBucketQuotaSys()
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}
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func initSafeMode(buckets []BucketInfo) (err error) {
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newObject := newObjectLayerWithoutSafeModeFn()
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// Construct path to config/transaction.lock for locking
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transactionConfigPrefix := minioConfigPrefix + "/transaction.lock"
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// Make sure to hold lock for entire migration to avoid
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// such that only one server should migrate the entire config
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// at a given time, this big transaction lock ensures this
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// appropriately. This is also true for rotation of encrypted
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// content.
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objLock := newObject.NewNSLock(GlobalContext, minioMetaBucket, transactionConfigPrefix)
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if err = objLock.GetLock(globalOperationTimeout); err != nil {
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return err
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}
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defer func(objLock RWLocker) {
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objLock.Unlock()
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if err != nil {
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var cerr config.Err
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if errors.As(err, &cerr) {
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return
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}
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// Prints the formatted startup message in safe mode operation.
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printStartupSafeModeMessage(getAPIEndpoints(), err)
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// Initialization returned error reaching safe mode and
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// not proceeding waiting for admin action.
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handleSignals()
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}
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}(objLock)
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// Migrate all backend configs to encrypted backend configs, optionally
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// handles rotating keys for encryption.
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if err = handleEncryptedConfigBackend(newObject, true); err != nil {
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return fmt.Errorf("Unable to handle encrypted backend for config, iam and policies: %w", err)
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}
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// **** WARNING ****
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// Migrating to encrypted backend should happen before initialization of any
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// sub-systems, make sure that we do not move the above codeblock elsewhere.
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// Validate and initialize all subsystems.
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doneCh := make(chan struct{})
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defer close(doneCh)
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// Initializing sub-systems needs a retry mechanism for
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// the following reasons:
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// - Read quorum is lost just after the initialization
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// of the object layer.
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// - Write quorum not met when upgrading configuration
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// version is needed, migration is needed etc.
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retryTimerCh := newRetryTimerSimple(doneCh)
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for {
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rquorum := InsufficientReadQuorum{}
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wquorum := InsufficientWriteQuorum{}
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bucketNotFound := BucketNotFound{}
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var err error
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select {
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case n := <-retryTimerCh:
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if err = initAllSubsystems(buckets, newObject); err != nil {
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if errors.Is(err, errDiskNotFound) ||
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errors.As(err, &rquorum) ||
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errors.As(err, &wquorum) ||
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errors.As(err, &bucketNotFound) {
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if n < 5 {
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logger.Info("Waiting for all sub-systems to be initialized..")
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} else {
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logger.Info("Waiting for all sub-systems to be initialized.. %v", err)
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}
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continue
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}
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return err
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}
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return nil
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case <-globalOSSignalCh:
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if err == nil {
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return errors.New("Initializing sub-systems stopped gracefully")
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}
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return fmt.Errorf("Unable to initialize sub-systems: %w", err)
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}
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}
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}
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func initAllSubsystems(buckets []BucketInfo, newObject ObjectLayer) (err error) {
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// Initialize config system.
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if err = globalConfigSys.Init(newObject); err != nil {
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return fmt.Errorf("Unable to initialize config system: %w", err)
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}
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if globalEtcdClient != nil {
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// **** WARNING ****
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// Migrating to encrypted backend on etcd should happen before initialization of
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// IAM sub-systems, make sure that we do not move the above codeblock elsewhere.
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if err = migrateIAMConfigsEtcdToEncrypted(GlobalContext, globalEtcdClient); err != nil {
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return fmt.Errorf("Unable to handle encrypted backend for iam and policies: %w", err)
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}
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}
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if err = globalIAMSys.Init(GlobalContext, newObject); err != nil {
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return fmt.Errorf("Unable to initialize IAM system: %w", err)
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}
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// Initialize notification system.
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if err = globalNotificationSys.Init(buckets, newObject); err != nil {
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return fmt.Errorf("Unable to initialize notification system: %w", err)
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}
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// Initialize policy system.
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if err = globalPolicySys.Init(buckets, newObject); err != nil {
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return fmt.Errorf("Unable to initialize policy system: %w", err)
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}
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// Initialize bucket object lock.
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if err = initBucketObjectLockConfig(buckets, newObject); err != nil {
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return fmt.Errorf("Unable to initialize object lock system: %w", err)
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}
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// Initialize lifecycle system.
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if err = globalLifecycleSys.Init(buckets, newObject); err != nil {
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return fmt.Errorf("Unable to initialize lifecycle system: %w", err)
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}
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// Initialize bucket encryption subsystem.
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if err = globalBucketSSEConfigSys.Init(buckets, newObject); err != nil {
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return fmt.Errorf("Unable to initialize bucket encryption subsystem: %w", err)
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}
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// Initialize bucket quota system.
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if err = globalBucketQuotaSys.Init(buckets, newObject); err != nil {
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return fmt.Errorf("Unable to initialize bucket quota system: %w", err)
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}
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return nil
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}
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func startBackgroundOps(ctx context.Context, objAPI ObjectLayer) {
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// Make sure only 1 crawler is running on the cluster.
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locker := objAPI.NewNSLock(ctx, minioMetaBucket, "leader")
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for {
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err := locker.GetLock(leaderLockTimeout)
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if err != nil {
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time.Sleep(leaderTick)
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continue
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}
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break
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// No unlock for "leader" lock.
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}
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if globalIsXL {
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initGlobalHeal(ctx, objAPI)
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}
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initDataUsageStats(ctx, objAPI)
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initDailyLifecycle(ctx, objAPI)
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initQuotaEnforcement(ctx, objAPI)
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}
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// serverMain handler called for 'minio server' command.
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func serverMain(ctx *cli.Context) {
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if ctx.Args().First() == "help" || !endpointsPresent(ctx) {
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cli.ShowCommandHelpAndExit(ctx, "server", 1)
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}
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setDefaultProfilerRates()
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// Initialize globalConsoleSys system
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globalConsoleSys = NewConsoleLogger(GlobalContext)
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signal.Notify(globalOSSignalCh, os.Interrupt, syscall.SIGTERM)
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// Handle all server command args.
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serverHandleCmdArgs(ctx)
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// Handle all server environment vars.
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serverHandleEnvVars()
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// Set node name, only set for distributed setup.
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globalConsoleSys.SetNodeName(globalEndpoints)
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// Initialize all help
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initHelp()
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// Check and load TLS certificates.
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var err error
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globalPublicCerts, globalTLSCerts, globalIsSSL, err = getTLSConfig()
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logger.FatalIf(err, "Unable to load the TLS configuration")
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// Check and load Root CAs.
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globalRootCAs, err = config.GetRootCAs(globalCertsCADir.Get())
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logger.FatalIf(err, "Failed to read root CAs (%v)", err)
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globalMinioEndpoint = func() string {
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host := globalMinioHost
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if host == "" {
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host = sortIPs(localIP4.ToSlice())[0]
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}
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return fmt.Sprintf("%s://%s", getURLScheme(globalIsSSL), net.JoinHostPort(host, globalMinioPort))
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}()
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// Is distributed setup, error out if no certificates are found for HTTPS endpoints.
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if globalIsDistXL {
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if globalEndpoints.HTTPS() && !globalIsSSL {
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logger.Fatal(config.ErrNoCertsAndHTTPSEndpoints(nil), "Unable to start the server")
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}
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if !globalEndpoints.HTTPS() && globalIsSSL {
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logger.Fatal(config.ErrCertsAndHTTPEndpoints(nil), "Unable to start the server")
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}
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}
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if !globalCLIContext.Quiet {
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// Check for new updates from dl.min.io.
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checkUpdate(getMinioMode())
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}
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if !globalActiveCred.IsValid() && globalIsDistXL {
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logger.Fatal(config.ErrEnvCredentialsMissingDistributed(nil),
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"Unable to initialize the server in distributed mode")
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}
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// Set system resources to maximum.
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if err = setMaxResources(); err != nil {
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logger.Info("Unable to set system resources to maximum %s", err)
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}
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if globalIsXL {
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// Init global heal state
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globalAllHealState = initHealState()
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globalBackgroundHealState = initHealState()
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}
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// Configure server.
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var handler http.Handler
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enableBucketQuotaOps := env.Get(envDataUsageCrawlConf, config.EnableOn) == config.EnableOn
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handler, err = configureServerHandler(globalEndpoints, enableBucketQuotaOps)
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if err != nil {
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logger.Fatal(config.ErrUnexpectedError(err), "Unable to configure one of server's RPC services")
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}
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var getCert certs.GetCertificateFunc
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if globalTLSCerts != nil {
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getCert = globalTLSCerts.GetCertificate
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}
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httpServer := xhttp.NewServer([]string{globalMinioAddr}, criticalErrorHandler{handler}, getCert)
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httpServer.BaseContext = func(listener net.Listener) context.Context {
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return GlobalContext
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}
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go func() {
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globalHTTPServerErrorCh <- httpServer.Start()
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}()
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globalObjLayerMutex.Lock()
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globalHTTPServer = httpServer
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globalObjLayerMutex.Unlock()
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if globalIsDistXL && globalEndpoints.FirstLocal() {
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for {
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// Additionally in distributed setup, validate the setup and configuration.
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err := verifyServerSystemConfig(globalEndpoints)
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if err == nil {
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break
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}
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logger.LogIf(GlobalContext, err, "Unable to initialize distributed setup")
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select {
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case <-GlobalContext.Done():
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return
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case <-time.After(5 * time.Second):
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}
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}
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}
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newObject, err := newObjectLayer(GlobalContext, globalEndpoints)
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logger.SetDeploymentID(globalDeploymentID)
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if err != nil {
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// Stop watching for any certificate changes.
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globalTLSCerts.Stop()
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globalHTTPServer.Shutdown()
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logger.Fatal(err, "Unable to initialize backend")
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}
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// Once endpoints are finalized, initialize the new object api in safe mode.
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globalObjLayerMutex.Lock()
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globalSafeMode = true
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globalObjectAPI = newObject
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globalObjLayerMutex.Unlock()
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newAllSubsystems()
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// Enable healing to heal drives if possible
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if globalIsXL {
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initBackgroundHealing(GlobalContext, newObject)
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initLocalDisksAutoHeal(GlobalContext, newObject)
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}
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go startBackgroundOps(GlobalContext, newObject)
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// Calls New() and initializes all sub-systems.
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buckets, err := newObject.ListBuckets(GlobalContext)
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if err != nil {
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logger.Fatal(err, "Unable to list buckets")
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}
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logger.FatalIf(initSafeMode(buckets), "Unable to initialize server switching into safe-mode")
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if globalCacheConfig.Enabled {
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// initialize the new disk cache objects.
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var cacheAPI CacheObjectLayer
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cacheAPI, err = newServerCacheObjects(GlobalContext, globalCacheConfig)
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logger.FatalIf(err, "Unable to initialize disk caching")
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globalObjLayerMutex.Lock()
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globalCacheObjectAPI = cacheAPI
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globalObjLayerMutex.Unlock()
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}
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// Populate existing buckets to the etcd backend
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if globalDNSConfig != nil {
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initFederatorBackend(buckets, newObject)
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}
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// Disable safe mode operation, after all initialization is over.
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globalObjLayerMutex.Lock()
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globalSafeMode = false
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globalObjLayerMutex.Unlock()
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// Prints the formatted startup message once object layer is initialized.
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printStartupMessage(getAPIEndpoints())
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if globalActiveCred.Equal(auth.DefaultCredentials) {
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msg := fmt.Sprintf("Detected default credentials '%s', please change the credentials immediately using 'MINIO_ACCESS_KEY' and 'MINIO_SECRET_KEY'", globalActiveCred)
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logger.StartupMessage(color.RedBold(msg))
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}
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handleSignals()
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}
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// Initialize object layer with the supplied disks, objectLayer is nil upon any error.
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func newObjectLayer(ctx context.Context, endpointZones EndpointZones) (newObject ObjectLayer, err error) {
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// For FS only, directly use the disk.
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if endpointZones.NEndpoints() == 1 {
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// Initialize new FS object layer.
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return NewFSObjectLayer(endpointZones[0].Endpoints[0].Path)
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}
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return newXLZones(ctx, endpointZones)
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}
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