tendermint/docs/tendermint-core/configuration.md

Configuration

Tendermint Core can be configured via a TOML file in $TMHOME/config/config.toml. Some of these parameters can be overridden by command-line flags. For most users, the options in the ##### main base configuration options ##### are intended to be modified while config options further below are intended for advance power users.

Options

The default configuration file create by tendermint init has all the parameters set with their default values. It will look something like the file below, however, double check by inspecting the config.toml created with your version of tendermint installed:

# This is a TOML config file.
# For more information, see https://github.com/toml-lang/toml

##### main base config options #####

# TCP or UNIX socket address of the ABCI application,
# or the name of an ABCI application compiled in with the Tendermint binary
proxy_app = "tcp://127.0.0.1:26658"

# A custom human readable name for this node
moniker = "anonymous"

# If this node is many blocks behind the tip of the chain, FastSync
# allows them to catchup quickly by downloading blocks in parallel
# and verifying their commits
fast_sync = true

# Database backend: leveldb | memdb | cleveldb
db_backend = "leveldb"

# Database directory
db_dir = "data"

# Output level for logging
log_level = "state:info,*:error"

# Output format: 'plain' (colored text) or 'json'
log_format = "plain"

##### additional base config options #####

# The ID of the chain to join (should be signed with every transaction and vote)
chain_id = ""

# Path to the JSON file containing the initial validator set and other meta data
genesis_file = "genesis.json"

# Path to the JSON file containing the private key to use as a validator in the consensus protocol
priv_validator_file = "priv_validator.json"

# Mechanism to connect to the ABCI application: socket | grpc
abci = "socket"

# TCP or UNIX socket address for the profiling server to listen on
prof_laddr = ""

# If true, query the ABCI app on connecting to a new peer
# so the app can decide if we should keep the connection or not
filter_peers = false

##### advanced configuration options #####

##### rpc server configuration options #####
[rpc]

# TCP or UNIX socket address for the RPC server to listen on
laddr = "tcp://0.0.0.0:26657"

# A list of origins a cross-domain request can be executed from
# Default value '[]' disables cors support
# Use '["*"]' to allow any origin
cors_allowed_origins = "[]"

# A list of methods the client is allowed to use with cross-domain requests
cors_allowed_methods = "[HEAD GET POST]"

# A list of non simple headers the client is allowed to use with cross-domain requests
cors_allowed_headers = "[Origin Accept Content-Type X-Requested-With X-Server-Time]"

# TCP or UNIX socket address for the gRPC server to listen on
# NOTE: This server only supports /broadcast_tx_commit
grpc_laddr = ""

# Maximum number of simultaneous connections.
# Does not include RPC (HTTP&WebSocket) connections. See max_open_connections
# If you want to accept more significant number than the default, make sure
# you increase your OS limits.
# 0 - unlimited.
# Should be < {ulimit -Sn} - {MaxNumInboundPeers} - {MaxNumOutboundPeers} - {N of wal, db and other open files}
# 1024 - 40 - 10 - 50 = 924 = ~900
grpc_max_open_connections = 900

# Activate unsafe RPC commands like /dial_seeds and /unsafe_flush_mempool
unsafe = false

# Maximum number of simultaneous connections (including WebSocket).
# Does not include gRPC connections. See grpc_max_open_connections
# If you want to accept more significant number than the default, make sure
# you increase your OS limits.
# 0 - unlimited.
# Should be < {ulimit -Sn} - {MaxNumInboundPeers} - {MaxNumOutboundPeers} - {N of wal, db and other open files}
# 1024 - 40 - 10 - 50 = 924 = ~900
max_open_connections = 900

##### peer to peer configuration options #####
[p2p]

# Address to listen for incoming connections
laddr = "tcp://0.0.0.0:26656"

# Comma separated list of seed nodes to connect to
seeds = ""

# Comma separated list of nodes to keep persistent connections to
persistent_peers = ""

# UPNP port forwarding
upnp = false

# Path to address book
addr_book_file = "addrbook.json"

# Set true for strict address routability rules
# Set false for private or local networks
addr_book_strict = true

# Maximum number of inbound peers
max_num_inbound_peers = 40

# Maximum number of outbound peers to connect to, excluding persistent peers
max_num_outbound_peers = 10

# Time to wait before flushing messages out on the connection
flush_throttle_timeout = "100ms"

# Maximum size of a message packet payload, in bytes
max_packet_msg_payload_size = 1024

# Rate at which packets can be sent, in bytes/second
send_rate = 5120000

# Rate at which packets can be received, in bytes/second
recv_rate = 5120000

# Set true to enable the peer-exchange reactor
pex = true

# Seed mode, in which node constantly crawls the network and looks for
# peers. If another node asks it for addresses, it responds and disconnects.
#
# Does not work if the peer-exchange reactor is disabled.
seed_mode = false

# Comma separated list of peer IDs to keep private (will not be gossiped to other peers)
private_peer_ids = ""

# Toggle to disable guard against peers connecting from the same ip.
allow_duplicate_ip = true

# Peer connection configuration.
handshake_timeout = "20s"
dial_timeout = "3s"

##### mempool configuration options #####
[mempool]

recheck = true
broadcast = true
wal_dir = "data/mempool.wal"

# size of the mempool
size = 100000

# size of the cache (used to filter transactions we saw earlier)
cache_size = 100000

##### consensus configuration options #####
[consensus]

wal_file = "data/cs.wal/wal"

timeout_propose = "3000ms"
timeout_propose_delta = "500ms"
timeout_prevote = "1000ms"
timeout_prevote_delta = "500ms"
timeout_precommit = "1000ms"
timeout_precommit_delta = "500ms"
timeout_commit = "1000ms"

# Make progress as soon as we have all the precommits (as if TimeoutCommit = 0)
skip_timeout_commit = false

# EmptyBlocks mode and possible interval between empty blocks
create_empty_blocks = true
create_empty_blocks_interval = "0s"

# Reactor sleep duration parameters
peer_gossip_sleep_duration = "100ms"
peer_query_maj23_sleep_duration = "2000ms"

# Block time parameters. Corresponds to the minimum time increment between consecutive blocks.
blocktime_iota = "1000ms"

##### transactions indexer configuration options #####
[tx_index]

# What indexer to use for transactions
#
# Options:
#   1) "null"
#   2) "kv" (default) - the simplest possible indexer, backed by key-value storage (defaults to levelDB; see DBBackend).
indexer = "kv"

# Comma-separated list of tags to index (by default the only tag is "tx.hash")
#
# You can also index transactions by height by adding "tx.height" tag here.
#
# It's recommended to index only a subset of tags due to possible memory
# bloat. This is, of course, depends on the indexer's DB and the volume of
# transactions.
index_tags = ""

# When set to true, tells indexer to index all tags (predefined tags:
# "tx.hash", "tx.height" and all tags from DeliverTx responses).
#
# Note this may be not desirable (see the comment above). IndexTags has a
# precedence over IndexAllTags (i.e. when given both, IndexTags will be
# indexed).
index_all_tags = false

##### instrumentation configuration options #####
[instrumentation]

# When true, Prometheus metrics are served under /metrics on
# PrometheusListenAddr.
# Check out the documentation for the list of available metrics.
prometheus = false

# Address to listen for Prometheus collector(s) connections
prometheus_listen_addr = ":26660"

# Maximum number of simultaneous connections.
# If you want to accept a more significant number than the default, make sure
# you increase your OS limits.
# 0 - unlimited.
max_open_connections = 3

# Instrumentation namespace
namespace = "tendermint"