fix: migrate to go.etcd.io import path (#9987)

with the merge of https://github.com/etcd-io/etcd/pull/11823
etcd v3.5.0 will now have a properly imported versioned path

this fixes our pending migration to newer repo

cmd/config-encrypted.go

@@ -24,11 +24,11 @@ import (
 	"time"
 	"unicode/utf8"
 
-	etcd "github.com/coreos/etcd/clientv3"
 	"github.com/minio/minio/cmd/config"
 	"github.com/minio/minio/cmd/logger"
 	"github.com/minio/minio/pkg/auth"
 	"github.com/minio/minio/pkg/madmin"
+	etcd "go.etcd.io/etcd/v3/clientv3"
 )
 
 func handleEncryptedConfigBackend(objAPI ObjectLayer) error {

cmd/config/etcd/dns/etcd_dns.go

@@ -1,5 +1,5 @@
 /*
- * MinIO Cloud Storage, (C) 2018 MinIO, Inc.
+ * MinIO Cloud Storage, (C) 2018,2020 MinIO, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -29,7 +29,7 @@ import (
 	"github.com/minio/minio-go/v6/pkg/set"
 
 	"github.com/coredns/coredns/plugin/etcd/msg"
-	"github.com/coreos/etcd/clientv3"
+	"go.etcd.io/etcd/v3/clientv3"
 )
 
 // ErrNoEntriesFound - Indicates no entries were found for the given key (directory)

cmd/config/etcd/etcd.go

@@ -22,11 +22,11 @@ import (
 	"strings"
 	"time"
 
-	"github.com/coreos/etcd/clientv3"
-	"github.com/coreos/etcd/clientv3/namespace"
 	"github.com/minio/minio/cmd/config"
 	"github.com/minio/minio/pkg/env"
 	xnet "github.com/minio/minio/pkg/net"
+	"go.etcd.io/etcd/v3/clientv3"
+	"go.etcd.io/etcd/v3/clientv3/namespace"
 )
 
 const (

cmd/etcd.go

@@ -21,7 +21,7 @@ import (
 	"errors"
 	"fmt"
 
-	etcd "github.com/coreos/etcd/clientv3"
+	etcd "go.etcd.io/etcd/v3/clientv3"
 )
 
 var errEtcdUnreachable = errors.New("etcd is unreachable, please check your endpoints")

cmd/globals.go

@@ -23,7 +23,6 @@ import (
 
 	"github.com/minio/minio-go/v6/pkg/set"
 
-	etcd "github.com/coreos/etcd/clientv3"
 	humanize "github.com/dustin/go-humanize"
 	"github.com/minio/minio/cmd/config/cache"
 	"github.com/minio/minio/cmd/config/compress"
@@ -35,6 +34,7 @@ import (
 	"github.com/minio/minio/cmd/crypto"
 	xhttp "github.com/minio/minio/cmd/http"
 	"github.com/minio/minio/pkg/auth"
+	etcd "go.etcd.io/etcd/v3/clientv3"
 
 	"github.com/minio/minio/pkg/certs"
 	"github.com/minio/minio/pkg/event"

cmd/iam-etcd-store.go

@@ -26,14 +26,14 @@ import (
 	"sync"
 	"time"
 
-	etcd "github.com/coreos/etcd/clientv3"
-	"github.com/coreos/etcd/mvcc/mvccpb"
 	jwtgo "github.com/dgrijalva/jwt-go"
 	"github.com/minio/minio-go/v6/pkg/set"
 	"github.com/minio/minio/cmd/logger"
 	"github.com/minio/minio/pkg/auth"
 	iampolicy "github.com/minio/minio/pkg/iam/policy"
 	"github.com/minio/minio/pkg/madmin"
+	etcd "go.etcd.io/etcd/v3/clientv3"
+	"go.etcd.io/etcd/v3/mvcc/mvccpb"
 )
 
 var defaultContextTimeout = 30 * time.Second

cmd/update.go

@@ -32,6 +32,7 @@ import (
 	"time"
 
 	"github.com/inconshreveable/go-update"
+	"github.com/mattn/go-ieproxy"
 	xhttp "github.com/minio/minio/cmd/http"
 	"github.com/minio/minio/cmd/logger"
 	"github.com/minio/minio/pkg/env"
@@ -408,7 +409,7 @@ const updateTimeout = 10 * time.Second
 
 func getUpdateTransport(timeout time.Duration) http.RoundTripper {
 	var updateTransport http.RoundTripper = &http.Transport{
-		Proxy:                 http.ProxyFromEnvironment,
+		Proxy:                 ieproxy.GetProxyFunc(),
 		DialContext:           xhttp.NewCustomDialContext(timeout),
 		IdleConnTimeout:       timeout,
 		TLSHandshakeTimeout:   timeout,

cmd/utils.go

@@ -39,6 +39,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/mattn/go-ieproxy"
 	xhttp "github.com/minio/minio/cmd/http"
 	"github.com/minio/minio/cmd/logger"
 	"github.com/minio/minio/pkg/handlers"
@@ -453,7 +454,7 @@ func newCustomHTTPTransport(tlsConfig *tls.Config, dialTimeout time.Duration) fu
 	// For more details about various values used here refer
 	// https://golang.org/pkg/net/http/#Transport documentation
 	tr := &http.Transport{
-		Proxy:                 http.ProxyFromEnvironment,
+		Proxy:                 ieproxy.GetProxyFunc(),
 		DialContext:           xhttp.NewCustomDialContext(dialTimeout),
 		MaxIdleConnsPerHost:   16,
 		MaxIdleConns:          16,