minio/cmd/globals.go
Harshavardhana 1164fc60f3 Bring semantic versioning to provide for rolling upgrades (#5495)
This PR brings semver capabilities in our RPC layer to
ensure that we can upgrade the servers in rolling fashion
while keeping I/O in progress. This is only a framework change
the functionality remains the same as such and we do not
have any special API changes for now. But in future when
we bring in API changes we will be able to upgrade servers
without a downtime.

Additional change in this PR is to not abort when serverVersions
mismatch in a distributed cluster, instead wait for the quorum
treat the situation as if the server is down. This allows
for administrator to properly upgrade all the servers in the cluster.

Fixes #5393
2018-02-06 15:07:17 -08:00

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/*
* Minio Cloud Storage, (C) 2015, 2016, 2017 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 (
"crypto/tls"
"crypto/x509"
"os"
"runtime"
"time"
humanize "github.com/dustin/go-humanize"
"github.com/fatih/color"
"github.com/minio/minio/pkg/auth"
miniohttp "github.com/minio/minio/pkg/http"
)
// minio configuration related constants.
const (
globalMinioCertExpireWarnDays = time.Hour * 24 * 30 // 30 days.
globalMinioDefaultRegion = ""
// This is a sha256 output of ``arn:aws:iam::minio:user/admin``,
// this is kept in present form to be compatible with S3 owner ID
// requirements -
//
// ```
// The canonical user ID is the Amazon S3only concept.
// It is 64-character obfuscated version of the account ID.
// ```
// http://docs.aws.amazon.com/AmazonS3/latest/dev/example-walkthroughs-managing-access-example4.html
globalMinioDefaultOwnerID = "02d6176db174dc93cb1b899f7c6078f08654445fe8cf1b6ce98d8855f66bdbf4"
globalMinioDefaultStorageClass = "STANDARD"
globalWindowsOSName = "windows"
globalNetBSDOSName = "netbsd"
globalSolarisOSName = "solaris"
globalMinioModeFS = "mode-server-fs"
globalMinioModeXL = "mode-server-xl"
globalMinioModeDistXL = "mode-server-distributed-xl"
globalMinioModeGatewayPrefix = "mode-gateway-"
// Add new global values here.
)
const (
// Limit fields size (except file) to 1Mib since Policy document
// can reach that size according to https://aws.amazon.com/articles/1434
maxFormFieldSize = int64(1 * humanize.MiByte)
// Limit memory allocation to store multipart data
maxFormMemory = int64(5 * humanize.MiByte)
// The maximum allowed time difference between the incoming request
// date and server date during signature verification.
globalMaxSkewTime = 15 * time.Minute // 15 minutes skew allowed.
// Default Read/Write timeouts for each connection.
globalConnReadTimeout = 15 * time.Minute // Timeout after 15 minutes of no data sent by the client.
globalConnWriteTimeout = 15 * time.Minute // Timeout after 15 minutes if no data received by the client.
)
var (
// Indicates if the running minio server is distributed setup.
globalIsDistXL = false
// Indicates if the running minio server is an erasure-code backend.
globalIsXL = false
// This flag is set to 'true' by default
globalIsBrowserEnabled = true
// This flag is set to 'true' when MINIO_BROWSER env is set.
globalIsEnvBrowser = false
// Set to true if credentials were passed from env, default is false.
globalIsEnvCreds = false
// This flag is set to 'true' when MINIO_REGION env is set.
globalIsEnvRegion = false
// This flag is set to 'true' when MINIO_UPDATE env is set to 'off'. Default is false.
globalInplaceUpdateDisabled = false
// This flag is set to 'us-east-1' by default
globalServerRegion = globalMinioDefaultRegion
// Maximum size of internal objects parts
globalPutPartSize = int64(64 * 1024 * 1024)
// Minio local server address (in `host:port` format)
globalMinioAddr = ""
// Minio default port, can be changed through command line.
globalMinioPort = "9000"
// Holds the host that was passed using --address
globalMinioHost = ""
// Peer communication struct
globalS3Peers = s3Peers{}
// CA root certificates, a nil value means system certs pool will be used
globalRootCAs *x509.CertPool
// IsSSL indicates if the server is configured with SSL.
globalIsSSL bool
globalTLSCertificate *tls.Certificate
globalHTTPServer *miniohttp.Server
globalHTTPServerErrorCh = make(chan error)
globalOSSignalCh = make(chan os.Signal, 1)
// File to log HTTP request/response headers and body.
globalHTTPTraceFile *os.File
// List of admin peers.
globalAdminPeers = adminPeers{}
// Minio server user agent string.
globalServerUserAgent = "Minio/" + ReleaseTag + " (" + runtime.GOOS + "; " + runtime.GOARCH + ")"
globalEndpoints EndpointList
// Global server's network statistics
globalConnStats = newConnStats()
// Global HTTP request statisitics
globalHTTPStats = newHTTPStats()
// Time when object layer was initialized on start up.
globalBootTime time.Time
globalActiveCred auth.Credentials
globalPublicCerts []*x509.Certificate
globalIsEnvDomainName bool
globalDomainName string // Root domain for virtual host style requests
globalListingTimeout = newDynamicTimeout( /*30*/ 600*time.Second /*5*/, 600*time.Second) // timeout for listing related ops
globalObjectTimeout = newDynamicTimeout( /*1*/ 10*time.Minute /*10*/, 600*time.Second) // timeout for Object API related ops
globalOperationTimeout = newDynamicTimeout(10*time.Minute /*30*/, 600*time.Second) // default timeout for general ops
globalHealingTimeout = newDynamicTimeout(30*time.Minute /*1*/, 30*time.Minute) // timeout for healing related ops
// Keep connection active for clients actively using ListenBucketNotification.
globalSNSConnAlive = 5 * time.Second // Send a whitespace every 5 seconds.
// Storage classes
// Set to indicate if storage class is set up
globalIsStorageClass bool
// Set to store reduced redundancy storage class
globalRRStorageClass storageClass
// Set to store standard storage class
globalStandardStorageClass storageClass
// RPC version.
globalRPCAPIVersion = semVersion{1, 0, 0}
// Add new variable global values here.
)
// global colors.
var (
colorBold = color.New(color.Bold).SprintFunc()
colorBlue = color.New(color.FgBlue).SprintfFunc()
colorYellow = color.New(color.FgYellow).SprintfFunc()
colorRed = color.New(color.FgRed).SprintfFunc()
)
// Returns minio global information, as a key value map.
// returned list of global values is not an exhaustive
// list. Feel free to add new relevant fields.
func getGlobalInfo() (globalInfo map[string]interface{}) {
globalInfo = map[string]interface{}{
"isDistXL": globalIsDistXL,
"isXL": globalIsXL,
"isBrowserEnabled": globalIsBrowserEnabled,
"isEnvBrowser": globalIsEnvBrowser,
"isEnvCreds": globalIsEnvCreds,
"isEnvRegion": globalIsEnvRegion,
"isSSL": globalIsSSL,
"serverRegion": globalServerRegion,
"serverUserAgent": globalServerUserAgent,
// Add more relevant global settings here.
}
return globalInfo
}