01 Nodeos Configuration

The plugin-specific options can be configured using either CLI options or a configuration file, config.ini. Nodeos-specific options can only be configured from the command line. All CLI options and config.ini options can be found by running nodeos --help as shown above.

Each config.ini option has a corresponding CLI option. However, not all CLI options are available in config.ini. For instance, most plugin-specific options that perform actions are not available in config.ini, such as --delete-state-history from state_history_plugin.

For example, the CLI option --plugin eosio::chain_api_plugin can also be set by adding plugin = eosio::chain_api_plugin in config.ini.

config.ini location

The default config.ini can be found in the following folders:

• Mac OS: ~/Library/Application Support/eosio/nodeos/config
• Linux: ~/.local/share/eosio/nodeos/config

A custom config.ini file can be set by passing the nodeos option --config path/to/config.ini.

Nodeos Example

The example below shows a typical usage of nodeos when starting a block producing node:

nodeos \
  -e -p eosio \
  --data-dir /users/mydir/eosio/data     \
  --config-dir /users/mydir/eosio/config \
  --plugin eosio::producer_plugin      \
  --plugin eosio::chain_plugin         \
  --plugin eosio::http_plugin          \
  --plugin eosio::state_history_plugin \
  --contracts-console   \
  --disable-replay-opts \
  --access-control-allow-origin='*' \
  --http-validate-host=false        \
  --verbose-http-errors             \
  --state-history-dir /shpdata \
  --trace-history              \
  --chain-state-history        \
  >> nodeos.log 2>&1 &

The above nodeos command starts a producing node by:

• enabling block production (-e)
• identifying itself as block producer "eosio" (-p)
• setting the blockchain data directory (--data-dir)
• setting the config.ini directory (--config-dir)
• loading plugins producer_plugin, chain_plugin, http_plugin, state_history_plugin (--plugin)
• passing chain_plugin options (--contracts-console, --disable-replay-opts)
• passing http-plugin options (--access-control-allow-origin, --http-validate-host, --verbose-http-errors)
• passing state_history options (--state-history-dir, --trace-history, --chain-state-history)
• redirecting both stdout and stderr to the nodeos.log file
• returning to the shell by running in the background (&)