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86 lines
3.1 KiB
Markdown
86 lines
3.1 KiB
Markdown
# Simple Local Testnet
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These scripts allow for running a small local testnet with a default of 4 beacon nodes, 4 validator clients and 4 Geth execution clients using Kurtosis.
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This setup can be useful for testing and development.
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## Installation
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1. Install [Docker](https://docs.docker.com/get-docker/). Verify that Docker has been successfully installed by running `sudo docker run hello-world`.
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1. Install [Kurtosis](https://docs.kurtosis.com/install/). Verify that Kurtosis has been successfully installed by running `kurtosis version` which should display the version.
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1. Install [`yq`](https://github.com/mikefarah/yq). If you are on Ubuntu, you can install `yq` by running `snap install yq`.
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## Starting the testnet
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To start a testnet, from the Lighthouse root repository:
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```bash
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cd ./scripts/local_testnet
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./start_local_testnet.sh
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```
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It will build a Lighthouse docker image from the root of the directory and will take an approximately 12 minutes to complete. Once built, the testing will be started automatically. You will see a list of services running and "Started!" at the end.
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You can also select your own Lighthouse docker image to use by specifying it in `network_params.yml` under the `cl_image` key.
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Full configuration reference for Kurtosis is specified [here](https://github.com/ethpandaops/ethereum-package?tab=readme-ov-file#configuration).
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To view all running services:
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```bash
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kurtosis enclave inspect local-testnet
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```
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To view the logs:
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```bash
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kurtosis service logs local-testnet $SERVICE_NAME
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```
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where `$SERVICE_NAME` is obtained by inspecting the running services above. For example, to view the logs of the first beacon node, validator client and Geth:
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```bash
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kurtosis service logs local-testnet -f cl-1-lighthouse-geth
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kurtosis service logs local-testnet -f vc-1-geth-lighthouse
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kurtosis service logs local-testnet -f el-1-geth-lighthouse
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```
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If you would like to save the logs, use the command:
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```bash
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kurtosis dump $OUTPUT_DIRECTORY
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```
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This will create a folder named `$OUTPUT_DIRECTORY` in the present working directory that contains all logs and other information. If you want the logs for a particular service and saved to a file named `logs.txt`:
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```bash
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kurtosis service logs local-testnet $SERVICE_NAME -a > logs.txt
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```
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where `$SERVICE_NAME` can be viewed by running `kurtosis enclave inspect local-testnet`.
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Kurtosis comes with a Dora explorer which can be opened with:
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```bash
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open $(kurtosis port print local-testnet dora http)
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```
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Some testnet parameters can be varied by modifying the `network_params.yaml` file. Kurtosis also comes with a web UI which can be open with `kurtosis web`.
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## Stopping the testnet
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To stop the testnet, from the Lighthouse root repository:
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```bash
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cd ./scripts/local_testnet
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./stop_local_testnet.sh
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```
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You will see "Local testnet stopped." at the end.
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## CLI options
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The script comes with some CLI options, which can be viewed with `./start_local_testnet.sh --help`. One of the CLI options is to avoid rebuilding Lighthouse each time the testnet starts, which can be configured with the command:
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```bash
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./start_local_testnet.sh -b false
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```
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