1dc5f2d0af
The approach is that now safe mode is only invoked when we cannot read the config or under some catastrophic situations, but not under situations when config entries are invalid or unreachable. This allows for maximum availability for MinIO and not fail on our users unlike most of our historical releases.
461 lines
15 KiB
Go
461 lines
15 KiB
Go
/*
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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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"encoding/gob"
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"errors"
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"fmt"
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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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"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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func init() {
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logger.Init(GOPATH, GOROOT)
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logger.RegisterError(config.FmtError)
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logger.AddTarget(globalConsoleSys.Console())
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gob.Register(VerifyFileError(""))
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gob.Register(DeleteFileError(""))
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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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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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ENVIRONMENT VARIABLES:
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ACCESS:
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MINIO_ACCESS_KEY: Custom username or access key of minimum 3 characters in length.
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MINIO_SECRET_KEY: Custom password or secret key of minimum 8 characters in length.
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BROWSER:
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MINIO_BROWSER: To disable web browser access, set this value to "off".
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DOMAIN:
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MINIO_DOMAIN: To enable virtual-host-style requests, set this value to MinIO host domain name.
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WORM:
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MINIO_WORM: To turn on Write-Once-Read-Many in server, set this value to "on".
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BUCKET-DNS:
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MINIO_DOMAIN: To enable bucket DNS requests, set this value to MinIO host domain name.
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MINIO_PUBLIC_IPS: To enable bucket DNS requests, set this value to list of MinIO host public IP(s) delimited by ",".
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MINIO_ETCD_ENDPOINTS: To enable bucket DNS requests, set this value to list of etcd endpoints delimited by ",".
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KMS:
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MINIO_KMS_VAULT_ENDPOINT: To enable Vault as KMS,set this value to Vault endpoint.
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MINIO_KMS_VAULT_APPROLE_ID: To enable Vault as KMS,set this value to Vault AppRole ID.
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MINIO_KMS_VAULT_APPROLE_SECRET: To enable Vault as KMS,set this value to Vault AppRole Secret ID.
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MINIO_KMS_VAULT_KEY_NAME: To enable Vault as KMS,set this value to Vault encryption key-ring name.
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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 minio server bound to a specific ADDRESS:PORT.
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{{.Prompt}} {{.HelpName}} --address 192.168.1.101:9000 /home/shared
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3. Start minio server and enable virtual-host-style requests.
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{{.Prompt}} {{.EnvVarSetCommand}} MINIO_DOMAIN{{.AssignmentOperator}}mydomain.com
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{{.Prompt}} {{.HelpName}} --address mydomain.com:9000 /mnt/export
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4. Start erasure coded minio server on a node with 64 drives.
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{{.Prompt}} {{.HelpName}} /mnt/export{1...64}
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5. Start distributed minio server on an 32 node setup with 32 drives each. Run following command on all the 32 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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6. Start minio server with KMS enabled.
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{{.Prompt}} {{.EnvVarSetCommand}} MINIO_KMS_VAULT_APPROLE_ID{{.AssignmentOperator}}9b56cc08-8258-45d5-24a3-679876769126
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{{.Prompt}} {{.EnvVarSetCommand}} MINIO_KMS_VAULT_APPROLE_SECRET{{.AssignmentOperator}}4e30c52f-13e4-a6f5-0763-d50e8cb4321f
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{{.Prompt}} {{.EnvVarSetCommand}} MINIO_KMS_VAULT_ENDPOINT{{.AssignmentOperator}}https://vault-endpoint-ip:8200
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{{.Prompt}} {{.EnvVarSetCommand}} MINIO_KMS_VAULT_KEY_NAME{{.AssignmentOperator}}my-minio-key
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{{.Prompt}} {{.HelpName}} /home/shared
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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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if err = checkEndpointsSubOptimal(ctx, setupType, globalEndpoints); err != nil {
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logger.Info("Optimal endpoint check failed %s", err)
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}
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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 sutiation 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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}
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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(context.Background(), 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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// Calls New() and initializes all sub-systems.
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newAllSubsystems()
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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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if err = initAllSubsystems(buckets, newObject); err != nil {
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return err
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}
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return nil
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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 err = globalNotificationSys.AddNotificationTargetsFromConfig(globalServerConfig); err != nil {
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return fmt.Errorf("Unable to initialize notification target(s) from config: %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(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(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 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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return nil
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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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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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// 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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// 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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// Initialize globalConsoleSys system
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globalConsoleSys = NewConsoleLogger(context.Background(), globalEndpoints)
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// Configure server.
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var handler http.Handler
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handler, err = configureServerHandler(globalEndpoints)
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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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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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// Additionally in distributed setup validate
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if err := verifyServerSystemConfig(globalEndpoints); err != nil {
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logger.Fatal(err, "Unable to initialize distributed setup")
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}
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}
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newObject, err := newObjectLayer(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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buckets, err := newObject.ListBuckets(context.Background())
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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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// 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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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(context.Background(), 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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initDataUsageStats()
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initDailyLifecycle()
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if globalIsXL {
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initBackgroundHealing()
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initLocalDisksAutoHeal()
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initGlobalHeal()
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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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// Set uptime time after object layer has initialized.
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globalBootTime = UTCNow()
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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(endpointZones EndpointZones) (newObject ObjectLayer, err error) {
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// For FS only, directly use the disk.
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if endpointZones.Nodes() == 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(endpointZones)
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}
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