feat: prototype 1.x - 2.x migration tool
Edd Robinson
parent
4e9fdf862c
commit
bbe40aeb82
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@ -12,6 +12,7 @@ import (
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"github.com/influxdata/influxdb/cmd/influxd/generate"
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"github.com/influxdata/influxdb/cmd/influxd/inspect"
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"github.com/influxdata/influxdb/cmd/influxd/launcher"
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"github.com/influxdata/influxdb/cmd/influxd/migrate"
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"github.com/influxdata/influxdb/cmd/influxd/restore"
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_ "github.com/influxdata/influxdb/query/builtin"
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_ "github.com/influxdata/influxdb/tsdb/tsi1"
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@ -48,6 +49,7 @@ func init() {
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rootCmd.AddCommand(generate.Command)
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rootCmd.AddCommand(inspect.NewCommand())
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rootCmd.AddCommand(restore.Command)
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rootCmd.AddCommand(migrate.Command)
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// TODO: this should be removed in the future: https://github.com/influxdata/influxdb/issues/16220
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if os.Getenv("QUERY_TRACING") == "1" {
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@ -0,0 +1,196 @@
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// Package migrate provides a tool to help migrate data from InfluxDB 1.x to 2.x
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package migrate
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import (
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"errors"
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"fmt"
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"os"
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"os/user"
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"path/filepath"
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"time"
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"github.com/influxdata/influxdb"
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"github.com/influxdata/influxdb/internal/fs"
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"github.com/influxdata/influxdb/kit/cli"
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"github.com/influxdata/influxdb/models"
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"github.com/influxdata/influxdb/tsdb/migrate"
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"github.com/spf13/cobra"
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)
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var Command = &cobra.Command{
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Use: "migrate",
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Short: "Migrate from InfluxDB >= 1.7.x to InfluxDB 2.x",
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Long: `
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TODO(edd)
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`,
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Args: cobra.ExactArgs(0),
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RunE: migrateE,
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}
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var flags struct {
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basePath1x string // base path of 1.x installation
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db string
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rp string
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from string // migrate only data at least as old as this (RFC3339Nano format)
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to string // migrate only data at least as young as this (RFC3339Nano format)
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migrateHot bool // migrate hot shards (can leave data behind)
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basePath2x string // base path of 2.x installation (defaults to ~/.influxdbv2)
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destOrg string // destination 2.x organisation (base-16 format)
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dryRun bool // enable dry-run mode (don't do any migration)
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verbose bool // enable verbose logging
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}
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// influx1Dir retrieves the InfluxDB 1.x directory.
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func influx1Dir() (string, error) {
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var dir string
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// By default, store meta and data files in current users home directory
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u, err := user.Current()
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if err == nil {
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dir = u.HomeDir
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} else if home := os.Getenv("HOME"); home != "" {
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dir = home
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} else {
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wd, err := os.Getwd()
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if err != nil {
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return "", err
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}
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dir = wd
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}
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dir = filepath.Join(dir, ".influxdb")
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return dir, nil
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}
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func init() {
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v1Dir, err := influx1Dir()
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if err != nil {
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panic(fmt.Errorf("failed to determine default InfluxDB 1.x directory: %s", err))
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}
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v2Dir, err := fs.InfluxDir()
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if err != nil {
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panic(fmt.Errorf("failed to determine default InfluxDB 2.x directory: %s", err))
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}
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opts := []cli.Opt{
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{
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DestP: &flags.basePath1x,
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Flag: "influxdb-1x-path",
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Default: v1Dir,
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Desc: "path to 1.x InfluxDB",
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},
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{
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DestP: &flags.basePath2x,
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Flag: "influxdb-2x-path",
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Default: v2Dir,
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Desc: "path to 2.x InfluxDB",
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},
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{
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DestP: &flags.db,
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Flag: "db",
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Default: "",
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Desc: "only import the provided 1.x database",
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},
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{
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DestP: &flags.rp,
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Flag: "rp",
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Default: "",
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Desc: "only import the provided 1.x retention policy. --db must be set",
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},
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{
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DestP: &flags.from,
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Flag: "from",
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Default: "",
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Desc: "earliest point to import",
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},
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{
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DestP: &flags.to,
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Flag: "to",
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Default: "",
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Desc: "latest point to import",
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},
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{
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DestP: &flags.destOrg,
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Flag: "org-id",
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Default: "",
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Desc: "destination 2.x organization id (required)",
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},
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{
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DestP: &flags.dryRun,
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Flag: "dry-run",
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Default: false,
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Desc: "simulate migration without running it",
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},
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{
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DestP: &flags.migrateHot,
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Flag: "migrate-hot-shards",
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Default: false,
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Desc: "migrate all shards including hot ones. Can leave unsnapshotted data behind",
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},
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{
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DestP: &flags.verbose,
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Flag: "verbose",
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Default: false,
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Desc: "enable verbose logging",
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},
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}
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cli.BindOptions(Command, opts)
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}
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func migrateE(cmd *cobra.Command, args []string) error {
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if flags.destOrg == "" {
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return errors.New("destination organization must be set")
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} else if flags.rp != "" && flags.db == "" {
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return errors.New("source database empty. Cannot filter by retention policy")
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}
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destOrg, err := influxdb.IDFromString(flags.destOrg)
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if err != nil {
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return err
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}
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fromNano := models.MinNanoTime
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if flags.from != "" {
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from, err := time.Parse(time.RFC3339Nano, flags.from)
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if err != nil {
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return err
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}
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fromNano = from.UnixNano()
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// TODO: enable this feature...
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_ = fromNano
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return errors.New("--from flag is currently unsupported; only all-time can be migrated")
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}
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toNano := models.MaxNanoTime
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if flags.to != "" {
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to, err := time.Parse(time.RFC3339Nano, flags.to)
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if err != nil {
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return err
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}
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toNano = to.UnixNano()
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// TODO: enable this feature...
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_ = toNano
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return errors.New("--to flag is currently unsupported; only all-time can be migrated")
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}
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// TODO: enable this feature...
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if flags.migrateHot {
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return errors.New("--migrate-hot-shards flag is currently unsupported; fully compact all shards before migrating")
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}
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migrator := migrate.NewMigrator(migrate.Config{
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SourcePath: flags.basePath1x,
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DestPath: flags.basePath2x,
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From: fromNano,
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To: toNano,
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MigrateHotShard: flags.migrateHot,
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Stdout: os.Stdout,
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VerboseLogging: flags.verbose,
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DestOrg: *destOrg,
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DryRun: flags.dryRun,
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})
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return migrator.Process1xShards(flags.db, flags.rp)
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}
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@ -0,0 +1,681 @@
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// Package migrate provides tooling to migrate data from InfluxDB 1.x to 2.x
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package migrate
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import (
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"bytes"
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"context"
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"encoding/binary"
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"path/filepath"
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"sort"
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"strconv"
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"strings"
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"time"
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"github.com/influxdata/influxdb"
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"github.com/influxdata/influxdb/bolt"
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"github.com/influxdata/influxdb/cmd/influx_inspect/buildtsi"
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"github.com/influxdata/influxdb/kv"
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"github.com/influxdata/influxdb/logger"
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"github.com/influxdata/influxdb/models"
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"github.com/influxdata/influxdb/pkg/bufio"
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"github.com/influxdata/influxdb/pkg/fs"
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"github.com/influxdata/influxdb/storage"
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"github.com/influxdata/influxdb/tsdb"
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"github.com/influxdata/influxdb/tsdb/tsi1"
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"github.com/influxdata/influxdb/tsdb/tsm1"
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"go.uber.org/zap"
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)
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const (
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dataDirName1x = "data"
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internalDBName1x = "_internal"
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importTempExtension = ".migrate"
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// // InfluxDB 1.x TSM index entry size.
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tsmIndexEntrySize1x = 0 +
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8 + // Block min time
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8 + // Block max time
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8 + // Offset of block
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4 // Size in bytes of block
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tsmKeyFieldSeparator1x = "#!~#" // tsm1 key field separator.
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)
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type Config struct {
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SourcePath string
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DestPath string
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DestOrg influxdb.ID
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From int64
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To int64
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MigrateHotShard bool
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DryRun bool
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// Optional if you want to emit logs
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Stdout io.Writer
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VerboseLogging bool
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}
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// A Migrator migrates TSM data from a InfluxDB 1.x to InfluxDB 2.x.
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type Migrator struct {
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Config
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store *bolt.KVStore // ref needed to we can cleanup
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metaSvc *kv.Service
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verboseStdout io.Writer
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current2xTSMGen int
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}
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func NewMigrator(c Config) *Migrator {
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if c.Stdout == nil {
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c.Stdout = ioutil.Discard
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}
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verboseStdout := ioutil.Discard
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if c.VerboseLogging {
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verboseStdout = c.Stdout
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}
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log := logger.New(c.Stdout)
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boltClient := bolt.NewClient(log.With(zap.String("service", "bolt")))
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boltClient.Path = filepath.Join(c.DestPath, "influxd.bolt")
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store := bolt.NewKVStore(
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log.With(zap.String("service", "kvstore-bolt")),
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filepath.Join(c.DestPath, "influxd.bolt"),
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)
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store.WithDB(boltClient.DB())
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if err := store.Open(context.Background()); err != nil {
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panic(err)
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}
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metaSvc := kv.NewService(log.With(zap.String("store", "kv")), store)
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// Update the destination path - we only care about the tsm store now.
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c.DestPath = filepath.Join(c.DestPath, "engine", "data")
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return &Migrator{Config: c, store: store, metaSvc: metaSvc, verboseStdout: verboseStdout}
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}
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// shardMapping provides a mapping between a 1.x shard and a bucket in 2.x
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type shardMapping struct {
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path string
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bucketID influxdb.ID
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}
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// Process1xShards migrates the contents of any matching 1.x shards.
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//
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// The caller can filter shards only belonging to a retention policy and database.
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// Providing the zero value for the filters will result in all shards being
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// migrated, with the exception of the `_internal` database, which is never
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// migrated unless explicitly filtered on.
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func (m *Migrator) Process1xShards(dbFilter, rpFilter string) error {
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defer m.store.Close()
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// determine current gen
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fs := tsm1.NewFileStore(m.DestPath)
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if err := fs.Open(context.Background()); err != nil {
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return err
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}
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m.current2xTSMGen = fs.NextGeneration()
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fs.Close()
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var (
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toProcessShards []shardMapping
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curDB, curRP string // track current db and rp
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bucketID influxdb.ID // track current bucket ID
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)
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err := walkShardDirs(filepath.Join(m.SourcePath, dataDirName1x), func(db string, rp string, path string) error {
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if dbFilter == "" && db == internalDBName1x {
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return nil // Don't import TSM data from _internal unless explicitly instructed to
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}
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// A database or retention policy filter has been specified and this
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// shard path does not match it.
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if (dbFilter != "" && db != dbFilter) || (rpFilter != "" && rp != rpFilter) {
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return nil
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}
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var err error
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if db != curDB || rp != curRP {
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if bucketID, err = m.createBucket(db, rp); err != nil {
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return err
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}
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curDB, curRP = db, rp
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}
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toProcessShards = append(toProcessShards, shardMapping{path: path, bucketID: bucketID})
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return nil
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})
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if err != nil {
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return err
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}
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// Sort shards so that for each database and retention policy, we deal handle
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// them in the order they were created.
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sortShardDirs(toProcessShards)
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for _, shard := range toProcessShards {
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now := time.Now()
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if err := m.Process1xShard(shard.path, shard.bucketID); err != nil {
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return err
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}
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fmt.Fprintf(m.Stdout, "Migrated shard %s to bucket %s in %v\n", shard.path, shard.bucketID.String(), time.Since(now))
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}
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fmt.Fprintln(m.Stdout, "Building TSI index")
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sfilePath := filepath.Join(filepath.Dir(m.DestPath), storage.DefaultSeriesFileDirectoryName)
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sfile := tsdb.NewSeriesFile(sfilePath)
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sfile.Logger = logger.New(m.verboseStdout)
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if err := sfile.Open(context.Background()); err != nil {
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return err
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}
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defer sfile.Close()
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indexPath := filepath.Join(filepath.Dir(m.DestPath), storage.DefaultIndexDirectoryName)
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// Check if TSI index exists.
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if _, err = os.Stat(indexPath); err == nil {
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if m.DryRun {
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fmt.Fprintf(m.Stdout, "Would remove index located at %q\n", indexPath)
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} else if err := os.RemoveAll(indexPath); err != nil { // Remove the index
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return err
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} else {
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fmt.Fprintf(m.Stdout, "Removed existing TSI index at %q\n", indexPath)
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}
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} else if !os.IsNotExist(err) {
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return err
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}
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if m.DryRun {
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fmt.Fprintf(m.Stdout, "Would rebuild index at %q\n", indexPath)
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return nil
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}
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walPath := filepath.Join(filepath.Dir(m.DestPath), storage.DefaultWALDirectoryName)
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err = buildtsi.IndexShard(sfile, indexPath, m.DestPath, walPath,
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tsi1.DefaultMaxIndexLogFileSize, uint64(tsm1.DefaultCacheMaxMemorySize),
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10000, logger.New(m.verboseStdout), false)
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if err != nil {
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msg := fmt.Sprintf(`
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**ERROR** - TSI index rebuild failed.
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The index has potentially been left in an unrecoverable state. Indexes can be rebuilt
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using the 'influxd inspect build-tsi' command.
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Step 1: remove TSI index with '$ rm -rf %s'
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Step 2: run '$ influxd inspect build-tsi'
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Original error: %v
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`, indexPath, err)
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return errors.New(msg)
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}
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return nil
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}
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// sortShardDirs sorts shard directories in lexicographical order according to
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// database and retention policy. Shards within the same database and
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// retention policy are sorted numerically by shard id.
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func sortShardDirs(shards []shardMapping) error {
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var err2 error
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sort.Slice(shards, func(i, j int) bool {
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iDir := filepath.Dir(shards[i].path)
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jDir := filepath.Dir(shards[j].path)
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if iDir != jDir {
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return iDir < jDir // db or rp differ
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}
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// Same db and rp. Sort on shard id.
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iID, err := strconv.Atoi(filepath.Base(shards[i].path))
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if err != nil {
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err2 = err
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return false
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}
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jID, err := strconv.Atoi(filepath.Base(shards[j].path))
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if err != nil {
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err2 = err
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return false
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}
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return iID < jID
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})
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return err2
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}
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func (m *Migrator) createBucket(db, rp string) (influxdb.ID, error) {
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name := filepath.Join(db, rp)
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bucket, err := m.metaSvc.FindBucketByName(context.Background(), m.DestOrg, name)
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if err != nil {
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return 0, err
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} else if bucket != nil {
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return bucket.ID, nil
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}
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if !m.DryRun {
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bucket = &influxdb.Bucket{
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Name: name,
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OrgID: m.DestOrg,
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}
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if err := m.metaSvc.CreateBucket(context.Background(), bucket); err != nil {
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return 0, err
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}
|
||||
fmt.Fprintf(m.verboseStdout, "Created bucket %q with ID %s\n", name, bucket.ID.String())
|
||||
} else {
|
||||
fmt.Fprintf(m.Stdout, "Would create bucket %q\n", name)
|
||||
}
|
||||
|
||||
return bucket.ID, nil
|
||||
}
|
||||
|
||||
// Process1xShard migrates the TSM data in a single 1.x shard to the 2.x data directory.
|
||||
//
|
||||
// First, the shard is checked to determine it's fully compacted. Hot shards are
|
||||
// not migrated by default as the WAL is not processed, which could lead to data
|
||||
// loss. Next, each TSM file contents is checked to ensure it overlaps the
|
||||
// desired time-range, and all matching data is migrated.
|
||||
//
|
||||
func (m *Migrator) Process1xShard(pth string, bucketID influxdb.ID) error {
|
||||
// * Check full compaction
|
||||
// * Stream TSM file into new TSM file
|
||||
// - full blocks can be copied over if the time range overlaps.
|
||||
// - partial blocks need to be decoded and written out up to the timestamp.
|
||||
// - Index needs to include any entries that have at least one block overlapping
|
||||
// the time range.
|
||||
|
||||
//
|
||||
// TODO(edd): strategy for detecting hot shard - need to check for any
|
||||
// existence of WAL files.
|
||||
//
|
||||
|
||||
// Check for `tmp` files and identify TSM file(s) path.
|
||||
var tsmPaths []string // Possible a fully compacted shard has multiple TSM files.
|
||||
filepath.Walk(pth, func(p string, info os.FileInfo, err error) error {
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if strings.HasSuffix(p, fmt.Sprintf(".%s.%s", tsm1.TSMFileExtension, tsm1.CompactionTempExtension)) {
|
||||
return fmt.Errorf("tmp TSM file detected at %q — aborting shard import", p)
|
||||
} else if ext := filepath.Ext(p); ext == "."+tsm1.TSMFileExtension {
|
||||
tsmPaths = append(tsmPaths, p)
|
||||
}
|
||||
|
||||
// All other non-tsm shard contents are skipped.
|
||||
return nil
|
||||
})
|
||||
|
||||
if len(tsmPaths) == 0 {
|
||||
return fmt.Errorf("no tsm data found at %q", pth)
|
||||
}
|
||||
|
||||
var processed bool
|
||||
for _, tsmPath := range tsmPaths {
|
||||
fd, err := os.Open(tsmPath)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
r, err := tsm1.NewTSMReader(fd)
|
||||
if err != nil {
|
||||
fd.Close()
|
||||
return err
|
||||
}
|
||||
|
||||
tsmMin, tsmMax := r.TimeRange()
|
||||
if !r.OverlapsTimeRange(m.From, m.To) {
|
||||
fmt.Fprintf(m.verboseStdout, "Skipping out-of-range (min-time: %v, max-time: %v) TSM file at path %q\n",
|
||||
time.Unix(0, tsmMin), time.Unix(0, tsmMax), tsmPath)
|
||||
if err := r.Close(); err != nil {
|
||||
return err
|
||||
}
|
||||
fd.Close()
|
||||
continue
|
||||
}
|
||||
|
||||
processed = true // the generation needs to be incremented
|
||||
|
||||
now := time.Now()
|
||||
// Entire TSM file is within the imported time range; copy all block data
|
||||
// and rewrite TSM index.
|
||||
if tsmMin >= m.From && tsmMax <= m.To {
|
||||
if err := m.processTSMFileFast(r, fd, bucketID); err != nil {
|
||||
r.Close()
|
||||
fd.Close() // flushes buffer before close
|
||||
return fmt.Errorf("error processing TSM file %q: %v", tsmPath, err)
|
||||
}
|
||||
if err := r.Close(); err != nil {
|
||||
return err
|
||||
}
|
||||
continue
|
||||
}
|
||||
|
||||
if err := m.processTSMFile(r); err != nil {
|
||||
r.Close()
|
||||
return fmt.Errorf("error processing TSM file %q: %v", tsmPath, err)
|
||||
}
|
||||
fmt.Fprintf(m.verboseStdout, "Processed TSM file: %s in %v\n", tsmPath, time.Since(now))
|
||||
if err := r.Close(); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
// Before returning we need to increase the generation to map the next shard
|
||||
// and ensure the TSM files don't clash with this one.
|
||||
if processed {
|
||||
// Determine how much to move increase the generation by looking at the
|
||||
// number of generations in the shard.
|
||||
minGen, _, err := tsm1.DefaultParseFileName(tsmPaths[0])
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
maxGen, _, err := tsm1.DefaultParseFileName(tsmPaths[len(tsmPaths)-1])
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
m.current2xTSMGen += maxGen - minGen + 1
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (m *Migrator) processTSMFile(r *tsm1.TSMReader) error {
|
||||
// TODO - support processing a partial TSM file.
|
||||
//
|
||||
// 0) Figure out destination TSM filename - see processTSMFileFast for how to do that.
|
||||
// 1) For each block in the file - check the min/max time on the block (using the TSM index) overlap;
|
||||
// 2) If they overlap completely then you can write the entire block (easy);
|
||||
// 3) Otherwise, decompress the block and scan the timestamps - reject the portion(s) of the block that don't overlap;
|
||||
// 4) Compress the new block back up and write it out
|
||||
// 5) Re-sort the TSM index, removing any entries where you rejected the entire block. (sort1xTSMKeys will sort the keys properly for you).
|
||||
|
||||
panic("not yet implemented")
|
||||
}
|
||||
|
||||
// processTSMFileFast processes all blocks in the provided TSM file, because all
|
||||
// TSM data in the file is within the time range being imported.
|
||||
func (m *Migrator) processTSMFileFast(r *tsm1.TSMReader, fi *os.File, bucketID influxdb.ID) (err error) {
|
||||
gen, seq, err := tsm1.DefaultParseFileName(r.Path())
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
name := tsm1.DefaultFormatFileName(m.current2xTSMGen+gen-1, seq)
|
||||
newPath := filepath.Join(m.DestPath, name+"."+tsm1.TSMFileExtension+importTempExtension)
|
||||
|
||||
if m.DryRun {
|
||||
fmt.Fprintf(m.Stdout, "Migrating %s --> %s\n", r.Path(), newPath)
|
||||
return nil
|
||||
}
|
||||
|
||||
fo, err := writeCloser(r.Path(), newPath)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// If there is no error writing the file then remove the .tmp extension.
|
||||
defer func() {
|
||||
fo.Close()
|
||||
if err == nil {
|
||||
// Rename import file.
|
||||
finalPath := strings.TrimSuffix(newPath, importTempExtension)
|
||||
if err2 := fs.RenameFile(newPath, finalPath); err2 != nil {
|
||||
err = err2
|
||||
return
|
||||
}
|
||||
fmt.Fprintf(m.Stdout, "Migrated %s --> %s\n", r.Path(), finalPath)
|
||||
}
|
||||
}()
|
||||
|
||||
// Determine end of block by reading index offset.
|
||||
indexOffset, err := indexOffset(fi)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// Return to beginning of file and copy the header and all block data to
|
||||
// new file.
|
||||
if _, err = fi.Seek(0, io.SeekStart); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
n, err := io.CopyN(fo, fi, int64(indexOffset))
|
||||
if err != nil {
|
||||
return err
|
||||
} else if n != int64(indexOffset) {
|
||||
return fmt.Errorf("short read of block data. Read %d/%d bytes", n, indexOffset)
|
||||
}
|
||||
|
||||
// Gather keys - need to materialise them all because they have to be re-sorted
|
||||
keys := make([][]byte, 0, 1000)
|
||||
itr := r.Iterator(nil)
|
||||
for itr.Next() {
|
||||
keys = append(keys, itr.Key())
|
||||
}
|
||||
if itr.Err() != nil {
|
||||
return itr.Err()
|
||||
}
|
||||
|
||||
// Sort 1.x TSM keys according to their new 2.x values.
|
||||
// Don't allocate the new keys though, otherwise you're doubling the heap
|
||||
// requirements for this file's index, which could be ~2GB * 2.
|
||||
sort1xTSMKeys(keys)
|
||||
|
||||
// Rewrite TSM index into new file.
|
||||
var tagsBuf models.Tags // Buffer to use for each series.
|
||||
var oldM []byte
|
||||
var seriesKeyBuf []byte // Buffer to use for new series key.
|
||||
var entriesBuf []tsm1.IndexEntry
|
||||
newM := tsdb.EncodeName(m.DestOrg, bucketID)
|
||||
|
||||
for _, tsmKey := range keys {
|
||||
sKey1x, fKey := tsm1.SeriesAndFieldFromCompositeKey(tsmKey)
|
||||
oldM, tagsBuf = models.ParseKeyBytesWithTags(sKey1x, tagsBuf)
|
||||
|
||||
// Rewrite the measurement and tags.
|
||||
sKey2x := rewriteSeriesKey(oldM, newM[:], fKey, tagsBuf, seriesKeyBuf[:0])
|
||||
|
||||
// The key is not in a TSM format. Convert it to TSM format.
|
||||
sKey2x = append(sKey2x, tsmKeyFieldSeparator1xBytes...)
|
||||
sKey2x = append(sKey2x, fKey...)
|
||||
|
||||
// Write the entries for the key back into new file.
|
||||
if entriesBuf, err = r.ReadEntries(tsmKey, entriesBuf[:0]); err != nil {
|
||||
return fmt.Errorf("unable to get entries for key %q. Error: %v", tsmKey, err)
|
||||
}
|
||||
|
||||
typ, err := r.Type(tsmKey) // TODO(edd): could capture type during previous iterator out of this loop
|
||||
if err != nil {
|
||||
return fmt.Errorf("unable to get type for key %q. Error: %v", tsmKey, err)
|
||||
}
|
||||
|
||||
if err := writeIndexEntries(fo, sKey2x, typ, entriesBuf); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
// Write Footer.
|
||||
var buf [8]byte
|
||||
binary.BigEndian.PutUint64(buf[:], indexOffset)
|
||||
_, err = fo.Write(buf[:])
|
||||
return err
|
||||
}
|
||||
|
||||
var (
|
||||
sortTSMKeysBufFirst []byte
|
||||
sortTSMKeysBufSecond []byte
|
||||
)
|
||||
|
||||
// sort1xTSMKeys sorts 1.x TSM keys lexicographically as if they were 2.x TSM keys.
|
||||
//
|
||||
// It is not safe to call sort1xTSMKeys concurrently because it uses shared
|
||||
// buffers to reduce allocations.
|
||||
func sort1xTSMKeys(keys [][]byte) {
|
||||
sort.SliceStable(keys, func(i, j int) bool {
|
||||
firstCutIdx := bytes.Index(keys[i], tsmKeyFieldSeparator1xBytes)
|
||||
secondCutIdx := bytes.Index(keys[j], tsmKeyFieldSeparator1xBytes)
|
||||
|
||||
if cap(sortTSMKeysBufFirst) < firstCutIdx+1 {
|
||||
sortTSMKeysBufFirst = append(sortTSMKeysBufFirst, make([]byte, firstCutIdx-len(sortTSMKeysBufFirst)+1)...)
|
||||
}
|
||||
sortTSMKeysBufFirst = sortTSMKeysBufFirst[:firstCutIdx+1]
|
||||
copy(sortTSMKeysBufFirst, keys[i][:firstCutIdx])
|
||||
sortTSMKeysBufFirst[len(sortTSMKeysBufFirst)-1] = ','
|
||||
|
||||
if cap(sortTSMKeysBufSecond) < secondCutIdx+1 {
|
||||
sortTSMKeysBufSecond = append(sortTSMKeysBufSecond, make([]byte, secondCutIdx-len(sortTSMKeysBufSecond)+1)...)
|
||||
}
|
||||
sortTSMKeysBufSecond = sortTSMKeysBufSecond[:secondCutIdx+1]
|
||||
copy(sortTSMKeysBufSecond, keys[j][:secondCutIdx])
|
||||
sortTSMKeysBufSecond[len(sortTSMKeysBufSecond)-1] = ','
|
||||
|
||||
return bytes.Compare(
|
||||
append(append(sortTSMKeysBufFirst, models.FieldKeyTagKeyBytes...), keys[i][firstCutIdx+len(tsmKeyFieldSeparator1x):]...),
|
||||
append(append(sortTSMKeysBufSecond, models.FieldKeyTagKeyBytes...), keys[j][secondCutIdx+len(tsmKeyFieldSeparator1x):]...),
|
||||
) < 0
|
||||
})
|
||||
}
|
||||
|
||||
var tsmKeyFieldSeparator1xBytes = []byte(tsmKeyFieldSeparator1x)
|
||||
|
||||
func writeIndexEntries(w io.Writer, key []byte, typ byte, entries []tsm1.IndexEntry) error {
|
||||
var buf [5 + tsmIndexEntrySize1x]byte
|
||||
binary.BigEndian.PutUint16(buf[0:2], uint16(len(key)))
|
||||
buf[2] = typ
|
||||
binary.BigEndian.PutUint16(buf[3:5], uint16(len(entries)))
|
||||
|
||||
// Write the key length.
|
||||
if _, err := w.Write(buf[0:2]); err != nil {
|
||||
return fmt.Errorf("write: writer key length error: %v", err)
|
||||
}
|
||||
|
||||
// Write the key.
|
||||
if _, err := w.Write(key); err != nil {
|
||||
return fmt.Errorf("write: writer key error: %v", err)
|
||||
}
|
||||
|
||||
// Write the block type and count
|
||||
if _, err := w.Write(buf[2:5]); err != nil {
|
||||
return fmt.Errorf("write: writer block type and count error: %v", err)
|
||||
}
|
||||
|
||||
// Write each index entry for all blocks for this key
|
||||
for _, entry := range entries {
|
||||
entry.AppendTo(buf[5:])
|
||||
n, err := w.Write(buf[5:])
|
||||
if err != nil {
|
||||
return err
|
||||
} else if n != tsmIndexEntrySize1x {
|
||||
return fmt.Errorf("incorrect number of bytes written for entry: %d", n)
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// rewriteSeriesKey takes a 1.x tsm series key and rewrites it to
|
||||
// a 2.x format by including the `_m`, `_f` tag pairs and a new measurement
|
||||
// comprising the org/bucket id.
|
||||
func rewriteSeriesKey(oldM, newM []byte, fkey []byte, tags models.Tags, buf []byte) []byte {
|
||||
// Add the `_f` and `_m` tags.
|
||||
tags = append(tags, models.Tag{}, models.Tag{}) // Make room for two new tags.
|
||||
copy(tags[1:], tags) // Copy existing tags down.
|
||||
tags[0] = models.NewTag(models.MeasurementTagKeyBytes, oldM)
|
||||
tags[len(tags)-1] = models.NewTag(models.FieldKeyTagKeyBytes, fkey)
|
||||
// Create a new series key using the new measurement name and tags.
|
||||
return models.AppendMakeKey(buf, newM, tags)
|
||||
}
|
||||
|
||||
func walkShardDirs(root string, fn func(db, rp, path string) error) error {
|
||||
type location struct {
|
||||
db, rp, path string
|
||||
id int
|
||||
}
|
||||
|
||||
dirs := map[string]location{}
|
||||
if err := filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if info.IsDir() {
|
||||
return nil
|
||||
}
|
||||
if filepath.Ext(info.Name()) == "."+tsm1.TSMFileExtension {
|
||||
shardDir := filepath.Dir(path)
|
||||
|
||||
id, err := strconv.Atoi(filepath.Base(shardDir))
|
||||
if err != nil || id < 1 {
|
||||
return fmt.Errorf("not a valid shard dir: %v", shardDir)
|
||||
}
|
||||
|
||||
absPath, err := filepath.Abs(path)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
parts := strings.Split(absPath, string(filepath.Separator))
|
||||
db, rp := parts[len(parts)-4], parts[len(parts)-3]
|
||||
dirs[shardDir] = location{db: db, rp: rp, id: id, path: shardDir}
|
||||
return nil
|
||||
}
|
||||
return nil
|
||||
}); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
dirsSlice := make([]location, 0, len(dirs))
|
||||
for _, v := range dirs {
|
||||
dirsSlice = append(dirsSlice, v)
|
||||
}
|
||||
|
||||
sort.Slice(dirsSlice, func(i, j int) bool {
|
||||
return dirsSlice[i].id < dirsSlice[j].id
|
||||
})
|
||||
|
||||
for _, shard := range dirs {
|
||||
if err := fn(shard.db, shard.rp, shard.path); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// writeCloser initialises an io.WriteCloser for writing a new TSM file.
|
||||
func writeCloser(src, dst string) (io.WriteCloser, error) {
|
||||
fd, err := os.Create(dst)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
w := bufio.NewWriterSize(fd, 1<<20)
|
||||
return w, nil
|
||||
}
|
||||
|
||||
// indexOffset returns the offset to the TSM index of the provided file, which
|
||||
// must be a valid TSM file.
|
||||
func indexOffset(fd *os.File) (uint64, error) {
|
||||
_, err := fd.Seek(-8, io.SeekEnd)
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
|
||||
buf := make([]byte, 8)
|
||||
n, err := fd.Read(buf)
|
||||
if err != nil {
|
||||
return 0, err
|
||||
} else if n != 8 {
|
||||
return 0, fmt.Errorf("short read of index offset on file %q", fd.Name())
|
||||
}
|
||||
|
||||
return binary.BigEndian.Uint64(buf), nil
|
||||
}
|
||||
|
|
@ -0,0 +1,110 @@
|
|||
package migrate
|
||||
|
||||
import (
|
||||
"reflect"
|
||||
"testing"
|
||||
|
||||
"github.com/influxdata/influxdb/pkg/slices"
|
||||
)
|
||||
|
||||
func Test_sortShardDirs(t *testing.T) {
|
||||
input := []shardMapping{
|
||||
{path: "/influxdb/data/db0/autogen/0"},
|
||||
{path: "/influxdb/data/db0/rp0/10"},
|
||||
{path: "/influxdb/data/db0/autogen/10"},
|
||||
{path: "/influxdb/data/db0/autogen/2"},
|
||||
{path: "/influxdb/data/db0/autogen/43"},
|
||||
{path: "/influxdb/data/apple/rp1/99"},
|
||||
{path: "/influxdb/data/apple/rp2/0"},
|
||||
{path: "/influxdb/data/db0/autogen/33"},
|
||||
}
|
||||
|
||||
expected := []shardMapping{
|
||||
{path: "/influxdb/data/apple/rp1/99"},
|
||||
{path: "/influxdb/data/apple/rp2/0"},
|
||||
{path: "/influxdb/data/db0/autogen/0"},
|
||||
{path: "/influxdb/data/db0/autogen/2"},
|
||||
{path: "/influxdb/data/db0/autogen/10"},
|
||||
{path: "/influxdb/data/db0/autogen/33"},
|
||||
{path: "/influxdb/data/db0/autogen/43"},
|
||||
{path: "/influxdb/data/db0/rp0/10"},
|
||||
}
|
||||
|
||||
if err := sortShardDirs(input); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
if got, exp := input, expected; !reflect.DeepEqual(got, exp) {
|
||||
t.Fatalf("got %v, expected %v", got, expected)
|
||||
}
|
||||
|
||||
input = append(input, shardMapping{path: "/influxdb/data/db0/rp0/badformat"})
|
||||
if err := sortShardDirs(input); err == nil {
|
||||
t.Fatal("expected error, got <nil>")
|
||||
}
|
||||
}
|
||||
|
||||
var sep = tsmKeyFieldSeparator1x
|
||||
|
||||
func Test_sort1xTSMKeys(t *testing.T) {
|
||||
cases := []struct {
|
||||
input [][]byte
|
||||
expected [][]byte
|
||||
}{
|
||||
{
|
||||
input: slices.StringsToBytes(
|
||||
"cpu"+sep+"a",
|
||||
"cpu"+sep+"b",
|
||||
"cpu"+sep+"c",
|
||||
"disk"+sep+"a",
|
||||
),
|
||||
expected: slices.StringsToBytes(
|
||||
"cpu"+sep+"a",
|
||||
"cpu"+sep+"b",
|
||||
"cpu"+sep+"c",
|
||||
"disk"+sep+"a",
|
||||
),
|
||||
},
|
||||
{
|
||||
input: slices.StringsToBytes(
|
||||
"cpu"+sep+"c",
|
||||
"cpu,region=east"+sep+"b",
|
||||
"cpu,region=east,server=a"+sep+"a",
|
||||
),
|
||||
expected: slices.StringsToBytes(
|
||||
"cpu,region=east,server=a"+sep+"a",
|
||||
"cpu,region=east"+sep+"b",
|
||||
"cpu"+sep+"c",
|
||||
),
|
||||
},
|
||||
{
|
||||
input: slices.StringsToBytes(
|
||||
"cpu"+sep+"c",
|
||||
"cpu,region=east"+sep+"b",
|
||||
"cpu,region=east,server=a"+sep+"a",
|
||||
),
|
||||
expected: slices.StringsToBytes(
|
||||
"cpu,region=east,server=a"+sep+"a",
|
||||
"cpu,region=east"+sep+"b",
|
||||
"cpu"+sep+"c",
|
||||
),
|
||||
},
|
||||
{
|
||||
input: slices.StringsToBytes(
|
||||
"\xc1\xbd\xd5)x!\a#H\xd4\xf3ç\xde\v\x14,\x00=m0,tag0=value1#!~#v0",
|
||||
"\xc1\xbd\xd5)x!\a#H\xd4\xf3ç\xde\v\x14,\x00=m0,tag0=value19,tag1=value999,tag2=value9,tag3=value0#!~#v0",
|
||||
),
|
||||
expected: slices.StringsToBytes(
|
||||
"\xc1\xbd\xd5)x!\a#H\xd4\xf3ç\xde\v\x14,\x00=m0,tag0=value1"+sep+"v0",
|
||||
"\xc1\xbd\xd5)x!\a#H\xd4\xf3ç\xde\v\x14,\x00=m0,tag0=value19,tag1=value999,tag2=value9,tag3=value0"+sep+"v0",
|
||||
),
|
||||
},
|
||||
}
|
||||
|
||||
for _, tc := range cases {
|
||||
sort1xTSMKeys(tc.input)
|
||||
if got, exp := tc.input, tc.expected; !reflect.DeepEqual(got, exp) {
|
||||
t.Errorf("got %s, expected %s", got, exp)
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue