Configuration

There are three ways of configuring Nethermind node. They are presented below in the reversed order of priorities (if you set the same property in the config file, in the environment variable and in the command line then the command line value will be used).
Config file
Change the configuration properties in the .cfg file of the network configuration you wish to run. Each .cfg file with the default setup is attached to Nethermind packages and can be found in configs folder.
Environment variables
The last way is to set the values in the environment variables, e.g. set NETHERMIND_INITCONFIG_PROCESSINGENABLED = false
Command line options
Another way is to setup each configuration property by passing flags to either Nethermind.Runner or Nethermind.Launcher. You can see the list of all config option by running ./Nethermind.Runner --help For example:
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./Nethermind.Runner --config ropsten --JsonRpc.Enabled true --Init.ProcessingEnabled false
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When passing a flag, each property needs to be prefixed with its respective Module, followed by the property name and its value e.g --Init.IsMining true
Use / as the path separator so the configs can be shared between all platforms supported (Linux, Windows, MacOS).
--config, --baseDbPath,--datadir, --loggerConfigSource, --log and --configsDirectoryoptions are available from the command line to select config file, base DB directory prefix and log level respectively.
datadir
Usage: --datadir or -dd
You may want to use this option to store all data that the node produces in a custom directory. The --datadir (-dd) changes paths of database, logs, keystoreto the target directory. You can specify either relative or absolute paths, e.g.
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--datadir data
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--datadir /home/user/nethermind/data
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--datadir ./data
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Absolute paths of Init.BaseDbPath, Init.LogDirectory orKeyStore.KeyStoreDirectoryin config file will not be overwritten by --datadir
baseDbPath
Usage: --baseDbPath or -d
Configures the path of the Nethermind's database folder. Is equal to setting --Init.BaseDbPath parameter.
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--baseDbPath /home/user/my_node/db
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config
Usage: --config or -c
Determines the configuration file of the network on which Nethermind will be running.
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--config xdai
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Networks
log
Usage: --log or -l
Changes the logging level.
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--log DEBUG
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Logging Configuration
configsDirectory
Usage: --configsDirectory or -cd
Changes the source directory of your configuration files.
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--configsDirectory /home/user/my_configs
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loggerConfigSource
Usage: --loggerConfigSource or -lcs
Changes the path of the NLog.config file.
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--loggerConfigSource /home/user/NLog.config
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Logging Configuration

Sample configuration

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Contents

Config file

Environment variables