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139 lines
3.4 KiB
139 lines
3.4 KiB
package node
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import (
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"bytes"
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"math"
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"os"
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"os/exec"
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"strconv"
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"syscall"
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"github.com/harmony-one/bls/ffi/go/bls"
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"github.com/harmony-one/harmony/internal/utils"
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"github.com/harmony-one/harmony/shard"
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)
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/*
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func (node *Node) transitionIntoNextEpoch(shardState types.State) {
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logger = logger.New(
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"blsPubKey", hex.EncodeToString(node.Consensus.PubKey.Serialize()),
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"curShard", node.Blockchain().ShardID(),
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"curLeader", node.Consensus.IsLeader())
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for _, c := range shardState {
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utils.Logger().Debug().
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Uint32("shardID", c.ShardID).
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Str("nodeList", c.Slots).
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Msg("new shard information")
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}
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myShardID, isNextLeader := findRoleInShardState(
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node.Consensus.PubKey, shardState)
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logger = logger.New(
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"nextShard", myShardID,
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"nextLeader", isNextLeader)
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if myShardID == math.MaxUint32 {
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getLogger().Info("Somehow I got kicked out. Exiting")
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os.Exit(8) // 8 represents it's a loop and the program restart itself
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}
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myShardState := shardState[myShardID]
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// Update public keys
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var publicKeys []*bls.PublicKey
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for idx, nodeID := range myShardState.Slots {
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key := &bls.PublicKey{}
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err := key.Deserialize(nodeID.BlsPublicKey[:])
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if err != nil {
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getLogger().Error("Failed to deserialize BLS public key in shard state",
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"idx", idx,
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"error", err)
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}
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publicKeys = append(publicKeys, key)
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}
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node.Consensus.UpdatePublicKeys(publicKeys)
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// node.DRand.UpdatePublicKeys(publicKeys)
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if node.Blockchain().ShardID() == myShardID {
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getLogger().Info("staying in the same shard")
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} else {
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getLogger().Info("moving to another shard")
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if err := node.shardChains.Close(); err != nil {
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getLogger().Error("cannot close shard chains", "error", err)
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}
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restartProcess(getRestartArguments(myShardID))
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}
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}
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*/
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func findRoleInShardState(
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key *bls.PublicKey, state shard.State,
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) (shardID uint32, isLeader bool) {
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keyBytes := key.Serialize()
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for idx, shard := range state.Shards {
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for nodeIdx, nodeID := range shard.Slots {
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if bytes.Compare(nodeID.BlsPublicKey[:], keyBytes) == 0 {
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return uint32(idx), nodeIdx == 0
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}
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}
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}
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return math.MaxUint32, false
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}
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func restartProcess(args []string) {
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execFile, err := getBinaryPath()
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if err != nil {
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utils.Logger().Error().
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Err(err).
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Str("file", execFile).
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Msg("Failed to get program path when restarting program")
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}
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utils.Logger().Info().
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Strs("args", args).
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Strs("env", os.Environ()).
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Msg("Restarting program")
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err = syscall.Exec(execFile, args, os.Environ())
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if err != nil {
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utils.Logger().Error().
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Err(err).
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Msg("Failed to restart program after resharding")
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}
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panic("syscall.Exec() is not supposed to return")
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}
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func getRestartArguments(myShardID uint32) []string {
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args := os.Args
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hasShardID := false
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shardIDFlag := "-shard_id"
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// newNodeFlag := "-is_newnode"
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for i, arg := range args {
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if arg == shardIDFlag {
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if i+1 < len(args) {
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args[i+1] = strconv.Itoa(int(myShardID))
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} else {
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args = append(args, strconv.Itoa(int(myShardID)))
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}
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hasShardID = true
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}
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// TODO: enable this
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//if arg == newNodeFlag {
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// args[i] = "" // remove new node flag
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//}
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}
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if !hasShardID {
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args = append(args, shardIDFlag)
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args = append(args, strconv.Itoa(int(myShardID)))
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}
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return args
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}
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// Gets the path of this currently running binary program.
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func getBinaryPath() (argv0 string, err error) {
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argv0, err = exec.LookPath(os.Args[0])
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if nil != err {
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return
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}
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if _, err = os.Stat(argv0); nil != err {
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return
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}
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return
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}
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