Add generated file

This PR adds generated files under pkg/client and vendor folder.

vendor/k8s.io/kubernetes/cluster/images/etcd/migrate/migrate.go

@@ -0,0 +1,188 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+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 main
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/golang/glog"
+	"github.com/spf13/cobra"
+)
+
+const (
+	versionFilename        = "version.txt"
+	defaultPort     uint64 = 18629
+)
+
+var (
+	migrateCmd = &cobra.Command{
+		Short: "Upgrade/downgrade etcd data across multiple versions",
+		Long: `Upgrade or downgrade etcd data across multiple versions to the target version
+
+Given a 'bin-dir' directory of etcd and etcdctl binaries, an etcd 'data-dir' with a 'version.txt' file and
+a target etcd version, this tool will upgrade or downgrade the etcd data from the version specified in
+'version.txt' to the target version.
+`,
+		Run: func(cmd *cobra.Command, args []string) {
+			runMigrate()
+		},
+	}
+	opts = migrateOpts{}
+)
+
+type migrateOpts struct {
+	name                 string
+	port                 uint64
+	peerListenUrls       string
+	peerAdvertiseUrls    string
+	binDir               string
+	dataDir              string
+	bundledVersionString string
+	etcdDataPrefix       string
+	ttlKeysDirectory     string
+	initialCluster       string
+	targetVersion        string
+	targetStorage        string
+	etcdServerArgs       string
+}
+
+func main() {
+	flags := migrateCmd.Flags()
+	flags.StringVar(&opts.name, "name", "", "etcd cluster member name. Defaults to etcd-{hostname}")
+	flags.Uint64Var(&opts.port, "port", defaultPort, "etcd client port to use during migration operations. This should be a different port than typically used by etcd to avoid clients accidentally connecting during upgrade/downgrade operations.")
+	flags.StringVar(&opts.peerListenUrls, "listen-peer-urls", "", "etcd --listen-peer-urls flag, required for HA clusters")
+	flags.StringVar(&opts.peerAdvertiseUrls, "initial-advertise-peer-urls", "", "etcd --initial-advertise-peer-urls flag, required for HA clusters")
+	flags.StringVar(&opts.binDir, "bin-dir", "/usr/local/bin", "directory of etcd and etcdctl binaries, must contain etcd-<version> and etcdctl-<version> for each version listed in bindled-versions")
+	flags.StringVar(&opts.dataDir, "data-dir", "", "etcd data directory of etcd server to migrate")
+	flags.StringVar(&opts.bundledVersionString, "bundled-versions", "", "comma separated list of etcd binary versions present under the bin-dir")
+	flags.StringVar(&opts.etcdDataPrefix, "etcd-data-prefix", "/registry", "etcd key prefix under which all objects are kept")
+	flags.StringVar(&opts.ttlKeysDirectory, "ttl-keys-directory", "", "etcd key prefix under which all keys with TTLs are kept. Defaults to {etcd-data-prefix}/events")
+	flags.StringVar(&opts.initialCluster, "initial-cluster", "", "comma separated list of name=endpoint pairs. Defaults to etcd-{hostname}=http://localhost:2380")
+	flags.StringVar(&opts.targetVersion, "target-version", "", "version of etcd to migrate to. Format must be '<major>.<minor>.<patch>'")
+	flags.StringVar(&opts.targetStorage, "target-storage", "", "storage version of etcd to migrate to, one of: etcd2, etcd3")
+	flags.StringVar(&opts.etcdServerArgs, "etcd-server-extra-args", "", "additional etcd server args for starting etcd servers during migration steps, --peer-* TLS cert flags should be added for etcd clusters with more than 1 member that use mutual TLS for peer communication.")
+	migrateCmd.Execute()
+}
+
+// runMigrate validates the command line flags and starts the migration.
+func runMigrate() {
+	if opts.name == "" {
+		hostname, err := os.Hostname()
+		if err != nil {
+			glog.Errorf("Error while getting hostname to supply default --name: %v", err)
+			os.Exit(1)
+		}
+		opts.name = fmt.Sprintf("etcd-%s", hostname)
+	}
+
+	if opts.ttlKeysDirectory == "" {
+		opts.ttlKeysDirectory = fmt.Sprintf("%s/events", opts.etcdDataPrefix)
+	}
+	if opts.initialCluster == "" {
+		opts.initialCluster = fmt.Sprintf("%s=http://localhost:2380", opts.name)
+	}
+	if opts.targetStorage == "" {
+		glog.Errorf("--target-storage is required")
+		os.Exit(1)
+	}
+	if opts.targetVersion == "" {
+		glog.Errorf("--target-version is required")
+		os.Exit(1)
+	}
+	if opts.dataDir == "" {
+		glog.Errorf("--data-dir is required")
+		os.Exit(1)
+	}
+	if opts.bundledVersionString == "" {
+		glog.Errorf("--bundled-versions is required")
+		os.Exit(1)
+	}
+
+	bundledVersions, err := ParseSupportedVersions(opts.bundledVersionString)
+	if err != nil {
+		glog.Errorf("Failed to parse --supported-versions: %v", err)
+	}
+	err = validateBundledVersions(bundledVersions, opts.binDir)
+	if err != nil {
+		glog.Errorf("Failed to validate that 'etcd-<version>' and 'etcdctl-<version>' binaries exist in --bin-dir '%s' for all --bundled-verions '%s': %v",
+			opts.binDir, opts.bundledVersionString, err)
+		os.Exit(1)
+	}
+
+	target := &EtcdVersionPair{
+		version:        MustParseEtcdVersion(opts.targetVersion),
+		storageVersion: MustParseEtcdStorageVersion(opts.targetStorage),
+	}
+
+	migrate(opts.name, opts.port, opts.peerListenUrls, opts.peerAdvertiseUrls, opts.binDir, opts.dataDir, opts.etcdDataPrefix, opts.ttlKeysDirectory, opts.initialCluster, target, bundledVersions, opts.etcdServerArgs)
+}
+
+// migrate opens or initializes the etcd data directory, configures the migrator, and starts the migration.
+func migrate(name string, port uint64, peerListenUrls string, peerAdvertiseUrls string, binPath string, dataDirPath string, etcdDataPrefix string, ttlKeysDirectory string,
+	initialCluster string, target *EtcdVersionPair, bundledVersions SupportedVersions, etcdServerArgs string) {
+
+	dataDir, err := OpenOrCreateDataDirectory(dataDirPath)
+	if err != nil {
+		glog.Errorf("Error opening or creating data directory %s: %v", dataDirPath, err)
+		os.Exit(1)
+	}
+
+	cfg := &EtcdMigrateCfg{
+		binPath:           binPath,
+		name:              name,
+		port:              port,
+		peerListenUrls:    peerListenUrls,
+		peerAdvertiseUrls: peerAdvertiseUrls,
+		etcdDataPrefix:    etcdDataPrefix,
+		ttlKeysDirectory:  ttlKeysDirectory,
+		initialCluster:    initialCluster,
+		supportedVersions: bundledVersions,
+		dataDirectory:     dataDirPath,
+		etcdServerArgs:    etcdServerArgs,
+	}
+	client, err := NewEtcdMigrateClient(cfg)
+	if err != nil {
+		glog.Errorf("Migration failed: %v", err)
+		os.Exit(1)
+	}
+	defer client.Close()
+
+	migrator := &Migrator{cfg, dataDir, client}
+
+	err = migrator.MigrateIfNeeded(target)
+	if err != nil {
+		glog.Errorf("Migration failed: %v", err)
+		os.Exit(1)
+	}
+}
+
+// validateBundledVersions checks that 'etcd-<version>' and 'etcdctl-<version>' binaries exist in the binDir
+// for each version in the bundledVersions list.
+func validateBundledVersions(bundledVersions SupportedVersions, binDir string) error {
+	for _, v := range bundledVersions {
+		for _, binaryName := range []string{"etcd", "etcdctl"} {
+			fn := filepath.Join(binDir, fmt.Sprintf("%s-%s", binaryName, v))
+			if _, err := os.Stat(fn); err != nil {
+				return fmt.Errorf("failed to validate '%s' binary exists for bundled-version '%s': %v", fn, v, err)
+			}
+
+		}
+	}
+	return nil
+}