mirror of
https://github.com/0glabs/0g-chain.git
synced 2024-12-26 16:25:21 +00:00
323 lines
11 KiB
Go
323 lines
11 KiB
Go
package main
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import (
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"fmt"
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"strings"
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"github.com/0glabs/0g-chain/app"
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"github.com/spf13/cobra"
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dbm "github.com/cometbft/cometbft-db"
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"github.com/cosmos/cosmos-sdk/client"
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"github.com/cosmos/cosmos-sdk/client/flags"
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"github.com/cosmos/cosmos-sdk/server"
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pruningtypes "github.com/cosmos/cosmos-sdk/store/pruning/types"
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"github.com/cosmos/cosmos-sdk/store/rootmulti"
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tmconfig "github.com/cometbft/cometbft/config"
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"github.com/cometbft/cometbft/node"
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tmstate "github.com/cometbft/cometbft/state"
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"github.com/cometbft/cometbft/store"
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ethermintserver "github.com/evmos/ethermint/server"
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)
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const (
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flagShardStartBlock = "start"
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flagShardEndBlock = "end"
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flagShardOnlyAppState = "only-app-state"
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flagShardForceAppVersion = "force-app-version"
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flagShardOnlyCometbftState = "only-cometbft-state"
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// TODO: --preserve flag for creating & operating on a copy?
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// allow using -1 to mean "latest" (perform no rollbacks)
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shardEndBlockLatest = -1
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)
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func newShardCmd(opts ethermintserver.StartOptions) *cobra.Command {
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cmd := &cobra.Command{
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Use: "shard --home <path-to-home-dir> --start <start-block> --end <end-block> [--only-app-state] [--only-cometbft-state] [--force-app-version <app-version>]",
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Short: "Strip all blocks from the database outside of a given range",
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Long: `shard opens a local 0g-chainhome directory's databases and removes all blocks outside a range defined by --start and --end. The range is inclusive of the end block.
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It works by first rolling back the latest state to the block before the end block, and then by pruning all state before the start block.
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Setting the end block to -1 signals to keep the latest block (no rollbacks).
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The application.db can be loaded at a particular height via the --force-app-version option. This is useful if the sharding process is prematurely terminated while the application.db is being sharded.
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The --only-app-state flag can be used to skip the pruning of the blockstore and cometbft state. This matches the functionality of the cosmos-sdk's "prune" command. Note that rolled back blocks will still affect all stores.
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Similarly, the --only-cometbft-state flag skips pruning app state. This can be useful if the shard command is prematurely terminated during the shard process.
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The shard command only flags the iavl tree nodes for deletion. Actual removal from the databases will be performed when each database is compacted.
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WARNING: this is a destructive action.`,
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Example: `Create a 1M block data shard (keeps blocks a0gi 1,000,000 to 2,000,000)
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$ 0gchaind shard --home path/to/.0gchain --start 1000000 --end 2000000
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Prune all blocks up to 5,000,000:
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$ 0gchaind shard --home path/to/.0gchain --start 5000000 --end -1
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Prune first 1M blocks _without_ affecting blockstore or cometBFT state:
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$ 0gchaind shard --home path/to/.0gchain --start 1000000 --end -1 --only-app-state`,
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RunE: func(cmd *cobra.Command, args []string) error {
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//////////////////////////
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// parse & validate flags
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//////////////////////////
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startBlock, err := cmd.Flags().GetInt64(flagShardStartBlock)
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if err != nil {
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return err
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}
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endBlock, err := cmd.Flags().GetInt64(flagShardEndBlock)
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if err != nil {
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return err
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}
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if (endBlock == 0 || endBlock < startBlock) && endBlock != shardEndBlockLatest {
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return fmt.Errorf("end block (%d) must be greater than start block (%d)", endBlock, startBlock)
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}
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onlyAppState, err := cmd.Flags().GetBool(flagShardOnlyAppState)
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if err != nil {
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return err
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}
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forceAppVersion, err := cmd.Flags().GetInt64(flagShardForceAppVersion)
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if err != nil {
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return err
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}
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onlyCometbftState, err := cmd.Flags().GetBool(flagShardOnlyCometbftState)
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if err != nil {
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return err
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}
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clientCtx := client.GetClientContextFromCmd(cmd)
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ctx := server.GetServerContextFromCmd(cmd)
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ctx.Config.SetRoot(clientCtx.HomeDir)
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////////////////////////
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// manage db connection
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////////////////////////
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// connect to database
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db, err := opts.DBOpener(ctx.Viper, clientCtx.HomeDir, server.GetAppDBBackend(ctx.Viper))
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if err != nil {
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return err
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}
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// close db connection when done
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defer func() {
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if err := db.Close(); err != nil {
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ctx.Logger.Error("error closing db", "error", err.Error())
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}
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}()
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///////////////////
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// load multistore
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///////////////////
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// create app in order to load the multistore
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// skip loading the latest version so the desired height can be manually loaded
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ctx.Viper.Set("skip-load-latest", true)
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app := opts.AppCreator(ctx.Logger, db, nil, ctx.Viper).(*app.App)
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if forceAppVersion == shardEndBlockLatest {
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if err := app.LoadLatestVersion(); err != nil {
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return err
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}
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} else {
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if err := app.LoadVersion(forceAppVersion); err != nil {
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return err
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}
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}
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// get the multistore
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cms := app.CommitMultiStore()
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multistore, ok := cms.(*rootmulti.Store)
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if !ok {
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return fmt.Errorf("only sharding of rootmulti.Store type is supported")
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}
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////////////////////////
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// shard application.db
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////////////////////////
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if !onlyCometbftState {
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if err := shardApplicationDb(multistore, startBlock, endBlock); err != nil {
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return err
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}
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} else {
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fmt.Printf("[%s] skipping sharding of application.db\n", flagShardOnlyCometbftState)
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}
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//////////////////////////////////
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// shard blockstore.db & state.db
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//////////////////////////////////
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// open block store & cometbft state
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blockStore, stateStore, err := openCometBftDbs(ctx.Config)
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if err != nil {
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return fmt.Errorf("failed to open cometbft dbs: %s", err)
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}
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if !onlyAppState {
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if err := shardCometBftDbs(blockStore, stateStore, startBlock, endBlock); err != nil {
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return err
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}
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} else {
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fmt.Printf("[%s] skipping sharding of blockstore.db and state.db\n", flagShardOnlyAppState)
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fmt.Printf("blockstore contains blocks %d - %d\n", blockStore.Base(), blockStore.Height())
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}
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return nil
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},
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}
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cmd.Flags().String(flags.FlagHome, opts.DefaultNodeHome, "The application home directory")
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cmd.Flags().Int64(flagShardStartBlock, 1, "Start block of data shard (inclusive)")
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cmd.Flags().Int64(flagShardEndBlock, 0, "End block of data shard (inclusive)")
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cmd.Flags().Bool(flagShardOnlyAppState, false, "Skip pruning of blockstore & cometbft state")
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cmd.Flags().Bool(flagShardOnlyCometbftState, false, "Skip pruning of application state")
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cmd.Flags().Int64(flagShardForceAppVersion, shardEndBlockLatest, "Instead of loading latest, force set the version of the multistore that is loaded")
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return cmd
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}
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// shardApplicationDb prunes the multistore up to startBlock and rolls it back to endBlock
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func shardApplicationDb(multistore *rootmulti.Store, startBlock, endBlock int64) error {
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//////////////////////////////
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// Rollback state to endBlock
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//////////////////////////////
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// handle desired endblock being latest
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latest := multistore.LastCommitID().Version
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if latest == 0 {
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return fmt.Errorf("failed to find latest height >0")
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}
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fmt.Printf("latest height: %d\n", latest)
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if endBlock == shardEndBlockLatest {
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endBlock = latest
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}
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shardSize := endBlock - startBlock + 1
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// error if requesting block range the database does not have
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if endBlock > latest {
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return fmt.Errorf("data does not contain end block (%d): latest version is %d", endBlock, latest)
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}
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fmt.Printf("pruning data down to heights %d - %d (%d blocks)\n", startBlock, endBlock, shardSize)
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// set pruning options to prevent no-ops from `PruneStores`
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multistore.SetPruning(pruningtypes.PruningOptions{KeepRecent: uint64(shardSize), Interval: 0})
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// rollback application state
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if err := multistore.RollbackToVersion(endBlock); err != nil {
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return fmt.Errorf("failed to rollback application state: %s", err)
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}
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//////////////////////////////
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// Prune blocks to startBlock
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//////////////////////////////
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// enumerate all heights to prune
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pruneHeights := make([]int64, 0, latest-shardSize)
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for i := int64(1); i < startBlock; i++ {
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pruneHeights = append(pruneHeights, i)
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}
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if len(pruneHeights) > 0 {
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// prune application state
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fmt.Printf("pruning application state to height %d\n", startBlock)
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for _, pruneHeight := range pruneHeights {
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if err := multistore.PruneStores(pruneHeight); err != nil {
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return fmt.Errorf("failed to prune application state: %s", err)
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}
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}
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}
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return nil
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}
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// shardCometBftDbs shrinks blockstore.db & state.db down to the desired block range
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func shardCometBftDbs(blockStore *store.BlockStore, stateStore tmstate.Store, startBlock, endBlock int64) error {
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var err error
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latest := blockStore.Height()
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if endBlock == shardEndBlockLatest {
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endBlock = latest
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}
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//////////////////////////////
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// Rollback state to endBlock
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//////////////////////////////
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// prep for outputting progress repeatedly to same line
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needsRollback := endBlock < latest
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progress := "rolling back blockstore & cometbft state to height %d"
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numChars := len(fmt.Sprintf(progress, latest))
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clearLine := fmt.Sprintf("\r%s\r", strings.Repeat(" ", numChars))
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printRollbackProgress := func(h int64) {
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fmt.Print(clearLine)
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fmt.Printf(progress, h)
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}
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// rollback tendermint db
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height := latest
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for height > endBlock {
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beforeRollbackHeight := height
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printRollbackProgress(height - 1)
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height, _, err = tmstate.Rollback(blockStore, stateStore, true)
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if err != nil {
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return fmt.Errorf("failed to rollback cometbft state: %w", err)
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}
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if beforeRollbackHeight == height {
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return fmt.Errorf("attempting to rollback cometbft state height %d failed (no rollback performed)", height)
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}
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}
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if needsRollback {
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fmt.Println()
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} else {
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fmt.Printf("latest store height is already %d\n", latest)
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}
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//////////////////////////////
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// Prune blocks to startBlock
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//////////////////////////////
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// get starting block of block store
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baseBlock := blockStore.Base()
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// only prune if data exists, otherwise blockStore.PruneBlocks will panic
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if baseBlock < startBlock {
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// prune block store
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fmt.Printf("pruning block store from %d - %d\n", baseBlock, startBlock)
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if _, err := blockStore.PruneBlocks(startBlock); err != nil {
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return fmt.Errorf("failed to prune block store (retainHeight=%d): %s", startBlock, err)
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}
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// prune cometbft state
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fmt.Printf("pruning cometbft state from %d - %d\n", baseBlock, startBlock)
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if err := stateStore.PruneStates(baseBlock, startBlock); err != nil {
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return fmt.Errorf("failed to prune cometbft state store (%d - %d): %s", baseBlock, startBlock, err)
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}
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} else {
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fmt.Printf("blockstore and cometbft state begins at block %d\n", baseBlock)
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}
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return nil
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}
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// inspired by https://github.com/Kava-Labs/cometbft/blob/277b0853db3f67865a55aa1c54f59790b5f591be/node/node.go#L234
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func openCometBftDbs(config *tmconfig.Config) (blockStore *store.BlockStore, stateStore tmstate.Store, err error) {
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dbProvider := node.DefaultDBProvider
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var blockStoreDB dbm.DB
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blockStoreDB, err = dbProvider(&node.DBContext{ID: "blockstore", Config: config})
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if err != nil {
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return
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}
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blockStore = store.NewBlockStore(blockStoreDB)
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stateDB, err := dbProvider(&node.DBContext{ID: "state", Config: config})
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if err != nil {
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return
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}
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stateStore = tmstate.NewStore(stateDB, tmstate.StoreOptions{
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DiscardABCIResponses: config.Storage.DiscardABCIResponses,
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})
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return
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}
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