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Updated on November 18, 2020

Teku Command Line

This reference describes the syntax of the Teku Command Line Interface (CLI) options and subcommands.

Important

The command line interface options are currently under development and may change.

Specifying Options

Teku options can be specified:

If an option is specified in multiple places, the order of priority is command line, environment variable, configuration file.

Teku Environment Variables

For each command line option, the equivalent environment variable is:

  • Upper-case
  • - is replaced by _
  • Has a TEKU_ prefix

For example, set --p2p-port using the TEKU_P2P_PORT environment variable.

Options

To start a Teku beacon chain client and validator run:

teku [OPTIONS] [COMMAND]

config-file

--config-file=<FILE>
--config-file=/home/me/me_node/config.yaml
TEKU_CONFIG_FILE=/home/me/me_node/config.yaml

The path to the YAML configuration file. The default is none.

data-base-path, data-path

--data-base-path=<PATH>
--data-base-path=/home/me/me_node
TEKU_DATA_BASE_PATH=/home/me/me_node
data-base-path: "/home/me/me_node"

The path to the Teku data directory. The default directory is OS dependent:

  • macOS: ~/Library/teku
  • Unix/Linux: $XDG_DATA_HOME/teku if $XDG_DATA_HOME is set; otherwise ~/.local/share/teku
  • Windows: %localappdata%\teku.

The default Docker image location is /root/.local/share/teku.

data-beacon-path

--data-beacon-path=<PATH>
--data-beacon-path=/home/me/me_beacon
TEKU_DATA_BEACON_PATH=/home/me/me_beacon
data-beacon-path: "/home/me/me_beaon"

Path to the beacon chain client data. Defaults to <data-base-path>/beacon where <data-base-path> is specified using --data-base-path.

data-storage-archive-frequency

--data-storage-archive-frequency=<NUMBER>
--data-storage-archive-frequency=1028
TEKU_DATA_STORAGE_ARCHIVE_FREQUENCY=1028
data-storage-archive-frequency: 1028

Set the frequency (in slots) at which to store finalized states to disk. Defaults to 2048.

This option is ignored if --data-storage-mode is set to prune.

Note

Specifying a larger number of slots as the archive frequency has a potentially higher overhead for retrieving finalized states since more states may need to be regenerated to get to the requested state. Specifying a lower number of slots as the frequency increases the disk space usage.

For example, --data-storage-archive-frequency=1 uses maximum disk space but has the lowest response time for retrieving a finalized state since each slot state is saved, whereas --data-storage-archive-frequency=2048 uses less disk space, but may need to regenerate the state because every 2048th slot state is saved.

data-storage-mode

--data-storage-mode=<STORAGE_MODE>
--data-storage-mode=archive
TEKU_DATA_STORAGE_MODE=archive
data-storage-mode: "archive"

Set the strategy for handling historical chain data. Valid options are prune and archive. Defaults to prune.

data-validator-path

--data-validator-path=<PATH>
--data-validator-path=/home/me/me_validator
TEKU_DATA_VALIDATOR_PATH=/home/me/me_validator
data-validator-path: "/home/me/me_validator"

Path to the validator client data. Defaults to <data-base-path>/validator where <data-base-path> is specified using --data-base-path.

eth1-deposit-contract-address

--eth1-deposit-contract-address=<ADDRESS>
--eth1-deposit-contract-address=0x77f7bED277449F51505a4C54550B074030d989bC
TEKU_ETH1_DEPOSIT_CONTRACT_ADDRESS=0x77f7bED277449F51505a4C54550B074030d989bC
eth1-deposit-contract-address: "0x77f7bED277449F51505a4C54550B074030d989bC"

Ethereum 1.0 address of the deposit contract. A deposit contract address must be defined if --eth1-endpoint is specified.

The deposit contract address can also be defined in:

eth1-endpoint

--eth1-endpoint=<URL>
--eth1-endpoint=http://localhost:8545
TEKU_ETH1_ENDPOINT=http://localhost:8545
eth1-endpoint: "http://localhost:8545"

The JSON-RPC URL of Ethereum 1.0 node.

If not specified, then provide an initial state using the --initial-state option, or start Teku from an existing database using --data-path, which provides the initial state to work from.

If using a cloud-based service such as Infura, then set the endpoint to the supplied URL. For example, https://goerli.infura.io/v3/<Project_ID>

help

-h, --help

Show the help message and exit.

initial-state

--initial-state=<FILE>
--initial-state=/home/me/genesis.ssz
TEKU_INITIAL_STATE=/home/me/genesis.ssz
initial-state: "/home/me/genesis.ssz"

Path or URL to the network genesis file.

This option does not need to be specified if the initial state is provided by the network specified using the --network option.

logging

-l, --logging=<LEVEL>
--logging=DEBUG
TEKU_LOGGING=DEBUG
logging: "DEBUG"

Sets the logging verbosity. Log levels are OFF, FATAL, ERROR, WARN, INFO, DEBUG, TRACE, ALL. Default is INFO.

log-color-enabled

--log-color-enabled[=<BOOLEAN>]
--log-color-enabled=false
TEKU_LOG_COLOR_ENABLED=false
log-color-enabled: false

Specify whether status and event log messages include a console color display code. Defaults to true.

log-destination

--log-destination=<LOG_DESTINATION>
--log-destination=CONSOLE
TEKU_LOG_DESTINATION=CONSOLE
log-destination: "CONSOLE"

Specify where to output log information. Valid options are:

  • BOTH
  • CONSOLE
  • DEFAULT_BOTH
  • FILE

Defaults to DEFAULT_BOTH. When using BOTH or DEFAULT_BOTH, system updates such as blockchain events are displayed on the console, and errors and other information are logged to a file. Specify the log file with the --log-file command-line option.

For production systems we recommend using the CONSOLE or FILE options to ensure all log information is available in one place.

Note

Use DEFAULT_BOTH when using a custom Log4J2 configuration file. Any other option applies the custom logging changes on top of its default settings.

log-file

--log-file=<FILENAME>
--log-file=teku_2020-01-01.log
TEKU_LOG_FILE=teku_2020-01-01.log
log-file: "teku_2020-01-01.log"

Relative or absolute location, and filename of the log file.

The default directory is OS dependent:

  • macOS: ~/Library/teku/logs
  • Unix/Linux: $XDG_DATA_HOME/teku/logs if $XDG_DATA_HOME is set; otherwise ~/.local/share/teku/logs
  • Windows: %localappdata%\teku\logs

The default Docker image location is /root/.local/share/teku/logs.

log-file-name-pattern

--log-file-name-pattern=<REGEX>
--log-file-name-pattern=tekuL_%d{yyyy-MM-dd}.log
TEKU_LOG_FILE_NAME_PATTERN=tekuL_%d{yyyy-MM-dd}.log
log-file-name-pattern: "tekuL_%d{yyyy-MM-dd}.log"

Filename pattern to apply when creating log files.

log-include-events-enabled

--log-include-events-enabled[=<BOOLEAN>]
--log-include-events-enabled=false
TEKU_LOG_INCLUDE_EVENTS_ENABLED=false
log-include-events-enabled: false

Specify whether to log frequent update events. For example every slot event with validators and attestations. Defaults to true.

log-include-validator-duties-enabled

--log-include-validator-duties-enabled[=<BOOLEAN>]
--log-include-validator-duties-enabled=true
TEKU_LOG_INCLUDE_VALIDATOR_DUTIES_ENABLED=true
log-include-validator-duties-enabled: true

Specify whether to log details of validator event duties. Defaults to false.

Note

Logs could become noisy when running many validators.

metrics-enabled

--metrics-enabled[=<BOOLEAN>]
--metrics-enabled=true
TEKU_METRICS_ENABLED=true
metrics-enabled: true

Set to true to enable the metrics exporter. The default is false.

metrics-host-allowlist

--metrics-host-allowlist=<hostname>[,<hostname>...]... or "*"
--metrics-host-allowlist=medomain.com,meotherdomain.com
TEKU_METRICS_HOST_ALLOWLIST=medomain.com,meotherdomain.com
metrics-host-allowlist: ["medomain.com", "meotherdomain.com"]

A comma-separated list of hostnames to allow access to the Teku metrics. By default, Teku accepts access from localhost and 127.0.0.1.

Tip

To allow all hostnames, use "*". We don’t recommend allowing all hostnames for production environments.

metrics-categories

--metrics-categories=<CATEGORY>[,<CATEGORY>...]...
--metrics-categories=BEACON,JVM,PROCESS
TEKU_METRICS_CATEGORIES=BEACON,JVM,PROCESS
metrics-categories: ["BEACON", "JVM", "PROCESS"]

Categories for which to track metrics. Options are JVM, PROCESS, BEACON, EVENTBUS, LIBP2P, NETWORK. All categories are enabled by default.

metrics-interface

--metrics-interface=<HOST>
--metrics-interface=192.168.10.101
TEKU_METRICS_INTERFACE=192.168.10.101
metrics-interface: "192.168.10.101"

Host on which Prometheus accesses Teku metrics. The default is 127.0.0.1.

metrics-port

--metrics-port=<PORT>
--metrics-port=6174
TEKU_METRICS_PORT=6174
metrics-port: 6174

Specifies the port (TCP) on which Prometheus accesses Teku metrics. The default is 8008.

network

--network=<NETWORK>
--network=mainnet
TEKU_NETWORK=mainnet
network: "mainnet"

Predefined network configuration. Accepts a predefined network name, or file path or URL to a YAML configuration file. The default is mainnet.

Possible values are:

Network Chain Type Description
mainnet Eth 2.0 Production Main network.
altona Eth 2.0 Test Multi-client testnet maintained by the Goerli testnet initiative.
medalla Eth 2.0 Test Multi-client testnet maintained by the Goerli testnet initiative.
minimal Eth 2.0 Test Used for local testing and development networks.
pyrmont Eth 2.0 Test Multi-client testnet maintained by the Goerli testnet initiative.

Predefined networks can provide defaults such the initial state of the network, bootnodes, and the address of the Ethereum 1.0 deposit contract.

p2p-advertised-ip

--p2p-advertised-ip=<IP_ADDRESS>
--p2p-advertised-ip=192.168.1.132
TEKU_P2P_ADVERTISED_IP=192.168.1.132
p2p-advertised-ip: "192.168.1.132"

Advertised peer-to-peer IP address. Default is 127.0.0.1.

p2p-enabled

--p2p-enabled[=<BOOLEAN>]
--p2p-enabled=false
TEKU_P2P_ENABLED=false
p2p-enabled: false

Enables or disables all P2P communication. The default is true.

p2p-interface

--p2p-interface=<HOST>
--p2p-interface=192.168.1.132
TEKU_P2P_INTERFACE=192.168.1.132
p2p-interface: "192.168.1.132"

Specifies the network interface on which the node listens for P2P communication. The default is 0.0.0.0 (all interfaces).

p2p-peer-lower-bound

--p2p-peer-lower-bound=<INTEGER>
--p2p-peer-lower-bound=25
TEKU_P2P_PEER_LOWER_BOUND=25
p2p-peer-lower-bound: 25

Lower bound on the target number of peers. The default is 20.

p2p-peer-upper-bound

--p2p-peer-upper-bound=<INTEGER>
--p2p-peer-upper-bound=40
TEKU_P2P_PEER_UPPER_BOUND=40
p2p-peer-upper-bound: 40

Upper bound on the target number of peers. The default is 30.

p2p-port

--p2p-port=<PORT>
# to listen on port 1789
--p2p-port=1789
# to listen on port 1789
TEKU_P2P_PORT=1789
p2p-port: 1789

Specifies the P2P listening ports (UDP and TCP). The default is 9000.

p2p-discovery-enabled

--p2p-discovery-enabled[=<BOOLEAN>]
--p2p-discovery-enabled=false
TEKU_P2P_DISCOVERY_ENABLED=false
p2p-discovery-enabled: false

Enables or disables P2P peer discovery. If disabled, p2p-static-peers defines the peer connections. The default is true.

p2p-discovery-bootnodes

--p2p-discovery-bootnodes=<ENR_ADDRESS>[,<ENR_ADDRESS>...]...
--p2p-discovery-bootnodes=enr:-Iu4QG...wgiMo,enr:-Iu4QL...wgiMo
TEKU_P2P_DISCOVERY_BOOTNODES=enr:-Iu4QG...wgiMo,enr:-Iu4QL...wgiMo
p2p-discovery-bootnodes: ["enr:-Iu4QG...wgiMo",
                          "enr:-Iu4QL...wgiMo"]

List of comma-separated Ethereum Node Records (ENRs) for P2P discovery bootstrap.

p2p-advertised-port

--p2p-advertised-port=<PORT>
--p2p-advertised-port=1789
TEKU_P2P_ADVERTISED_PORT=1789
p2p-advertised-port: 1789

The advertised P2P port. The default is the port specified in --p2p-port

p2p-private-key-file

--p2p-private-key-file=<PATH_TO_FILE>
--p2p-private-key-file=/home/me/me_node/key
TEKU_P2P_PRIVATE_KEY_FILE=/home/me/me_node/key
p2p-private-key-file: "/home/me/me_node/key"

File containing the node’s private key.

p2p-static-peers

--p2p-static-peers=<ADDRESS>[,<ADDRESS>...]...
--p2p-static-peers=/ip4/151.150.191.80/tcp/9000/p2p/16Ui...aXRz,/ip4/151.150.191.80/tcp/9000/p2p/16Ui...q6f1
TEKU_P2P_STATIC-PEERS=/ip4/151.150.191.80/tcp/9000/p2p/16Ui...aXRz,/ip4/151.150.191.80/tcp/9000/p2p/16Ui...q6f1
p2p-static-peers: ["/ip4/151.150.191.80/tcp/9000/p2p/16Ui...aXRz",
                   "/ip4/151.150.191.80/tcp/9000/p2p/16Ui...q6f1"]

List of comma-separated multiaddresses of static peers.

rest-api-docs-enabled

--rest-api-docs-enabled[=<BOOLEAN>]
--rest-api-docs-enabled=true
TEKU_REST_API_DOCS_ENABLED=true
rest-api-docs-enabled: true

Set to true to enable the REST API documentation. The default is false.

The documentation can be accessed at http://<interface>:<port>/swagger-ui where:

rest-api-enabled

--rest-api-enabled[=<BOOLEAN>]
--rest-api-enabled=true
TEKU_REST_API_ENABLED=true
rest-api-enabled: true

Set to true to enable the REST API service. The default is false.

If set to true, then use --rest-api-host-allowlist to limit access to trusted parties.

rest-api-host-allowlist

--rest-api-host-allowlist=<hostname>[,<hostname>...]... or "*"
--rest-api-host-allowlist=medomain.com,meotherdomain.com
TEKU_REST_API_HOST_ALLOWLIST=medomain.com,meotherdomain.com
rest-api-host-allowlist: ["medomain.com", "meotherdomain.com"]

A comma-separated list of hostnames to allow access to the REST API. By default, Teku accepts access from localhost and 127.0.0.1.

Warning

Only trusted parties should access the REST API. Do not directly expose these APIs publicly on production nodes.

We don’t recommend allowing all hostnames ("*") for production environments.

rest-api-interface

--rest-api-interface=<HOST>
# to listen on all interfaces
--rest-api-interface=0.0.0.0
TEKU_REST_API_INTERFACE=0.0.0.0
rest-api-interface: "0.0.0.0"

Specifies the interface on which the REST API listens. The default is 127.0.0.1.

rest-api-port

--rest-api-port=<PORT>
# to listen on port 3435
--rest-api-port=3435
TEKU_REST_API_PORT=3435
rest-api-port: 3435

Specifies REST API listening port (HTTP). The default is 5051.

version

-V, --version

Displays the version and exits.

validator-keys

--validator-keys=<KEY_DIR>:<PASS_DIR> | <KEY_FILE>:<PASS_FILE>[,<KEY_DIR>:<PASS_DIR> | <KEY_FILE>:<PASS_FILE>...]...
--validator-keys=/home/validator/keys:home/validator/passwords
--validator-keys=/home/validator/keys/validator_217179e.json:/home/validator/passwords/validator_217179e.txt
TEKU_VALIDATOR_KEYS=/home/validator/keys:home/validator/passwords
validator-keys: "/home/validator/keys:home/validator/passwords"

Directory or file to load the encrypted keystore file(s) and associated password file(s) from. Keystore files must use the .json file extension, and password files must use the .txt file extension.

When specifying directories, Teku expects to find identically named keystore and password files. For example validator_217179e.json and validator_217179e.txt.

When specifying file names, Teku expects that the files exist.

Note

The path separator is operating system dependent, and should be ; in Windows rather than :.

validators-external-signer-public-keys

--validators-external-signer-public-keys=<KEY>[,<KEY>...]
--validators-external-signer-public-keys=0xa99a...e44c,0xb89b...4a0b
TEKU_VALIDATORS_EXTERNAL_SIGNER_PUBLIC_KEYS=0xa99a...e44c,0xb89b...4a0b
validators-external-signer-public-keys: ["0xa99a...e44c","0xb89b...4a0b"]

List of validator public keys used by an external signer (for example, Web3Signer).

validators-external-signer-slashing-protection-enabled

--validators-external-signer-slashing-protection-enabled[=<BOOLEAN>]
--validators-external-signer-slashing-protection-enabled=false
TEKU_VALIDATORS_EXTERNAL_SIGNER_SLASHING_PROTECTION_ENABLED=false
validators-external-signer-slashing-protection-enabled: false

Specify whether to use Teku’s built-in slashing protection when using an external signer such as Web3Signer. Defaults to true.

Set this option to false if using the slashing protection implemented by an external signer.

Warning

Ensure the external signer has slashing protection enabled before disabling Teku slashing protection, otherwise a validator may get slashed.

Built-in slashing protection can only be disabled for validators using external signers. Validators using Teku to sign blocks and attestations always uses its built-in slashing protection.

validators-external-signer-timeout

--validators-external-signer-timeout=<INTEGER>
--validators-external-signer-timeout=2000
TEKU_VALIDATORS_EXTERNAL_SIGNER_TIMEOUT=2000
validators-external-signer-timeout: 2000

Timeout in milliseconds for requests to the external signer. Default is 1000.

validators-external-signer-url

--validators-external-signer-url=<URL>
--validators-external-signer-url=http://localhost:9000
TEKU_VALIDATORS_EXTERNAL_SIGNER_URL=http://localhost:9000
validators-external-signer-url: "http://localhost:9000"

URL on which the external signer (for example, Web3Signer) is running.

validators-graffiti

--validators-graffiti=<STRING>
--validators-graffiti="Teku validator"
TEKU_VALIDATORS_GRAFFITI="Teku validator"
validators-graffiti: "Teku validator"

Graffiti to add when creating a block. Gets converted to bytes and padded to Bytes32.

The same graffiti is used for all validators started with this beacon node.

validators-keystore-locking-enabled

--validators-keystore-locking-enabled=<BOOLEAN>
--validators-keystore-locking-enabled=true
TEKU_VALIDATORS_KEYSTORE_LOCKING_ENABLED=true
validators-keystore-locking-enabled: true

Locks the keystore files listed in --validator-keys. Defaults to true.

Attempts to lock all keystores in a directory if a directory is specified in --validator-keys.

ws-checkpoint

--ws-checkpoint=<BLOCK_ROOT>:<EPOCH_NUMBER>
--ws-checkpoint=0x5a642bb8f367e98c0d11426d98d28c465f8988fc960500886cb49faf0372883a:3600
TEKU_WS_CHECKPOINT=0x5a642bb8f367e98c0d11426d98d28c465f8988fc960500886cb49faf0372883a:3600
ws-checkpoint: "0x5a642bb8f367e98c0d11426d98d28c465f8988fc960500886cb49faf0372883a:3600"

A recent checkpoint within the weak subjectivity period.

The weak subjectivity checkpoint is a recent finalized checkpoint on the correct chain. By supplying a weak subjectivity checkpoint, you ensure that nodes that have been offline for a long period follow the correct chain. It protects the node from long-range attacks by malicious actors.

Use the admin weak-subjectivity subcommand to display or clear your weak subjectivity settings.

Questions or feedback? You can discuss issues and obtain free support on Teku Discord channel.
For paid professional support by Consensys, contact us at quorum@consensys.net