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Overview | Hive Commands | Simulators | Clients

Installing Hive

We have not tested hive on any OS other than Linux. It is usually best to use Ubuntu or Debian.

First add build-essential by sudo apt install build-essential. Also install Go version 1.13 or later and add it to your $PATH as described in the Go installation documentation. You can check the installed Go version by running go version.

To get hive, you first need to clone the repository to the location of your choice. Then you can build the hive executable.

git clone https://github.com/ethereum/hive
cd ./hive
go build .

To run simulations, you need a working Docker setup. Hive needs to be run on the same machine as dockerd. Using docker remotely is not supported at this time. Install docker and add your user to the docker group to allow using docker without sudo.

sudo usermod -a -G docker <user_name>

Running Hive

All hive commands should be run from within the root of the repository. To run a simulation, use the following command:

./hive --sim <simulation> --client <client(s) you want to test against>

For example, if you want to run the discv4 test against geth and openethereum, here is how the command would look:

./hive --sim devp2p/discv4 --client go-ethereum,openethereum

The client list may contain any number of clients. You can select a specific client version by appending it to the client name with _, for example:

./hive --sim devp2p/discv4 --client go-ethereum_v1.9.22,go-ethereum_v1.9.23

Simulation runs can be customized in many ways. Here's an overview of the available command-line options.

--client.checktimelimit <timeout>: The timeout of waiting for clients to open up TCP port 8545. If a very long chain is imported, this timeout may need to be quite long. A lower value means that hive won't wait as long in case the node crashes and never opens the RPC port. Defaults to 3 minutes.

--docker.pull: Setting this option makes hive re-pull the base images of all built docker containers.

--docker.output: This enables printing of all docker container output to stderr.

--docker.nocache <expression>: Regular expression selecting docker images to forcibly rebuild. You can use this option during simulator development to ensure a new image is built even when there are no changes to the simulator code.

--sim.timelimit <timeout>: Simulation timeout. Hive aborts the simulator if it exceeds this time. There is no default timeout.

--sim.loglevel <level>: Selects log level of client instances. Supports values 0-5, defaults to 3. Note that this value may be overridden by simulators for specific clients. This sets the default value of HIVE_LOGLEVEL in client containers.

--sim.parallelism <number>: Sets max number of parallel clients/containers. This is interpreted by simulators. It sets the HIVE_PARALLELISM environment variable. Defaults to 1.

--sim.testlimit <number>: Max number of tests to execute per client. This is interpreted by simulators. It sets the HIVE_SIMLIMIT environment variable.

Viewing simulation results (hiveview)

The results of hive simulation runs are stored in JSON files containing test results, and hive also creates several log files containing the output of the simulator and clients. To view test results and logs in a web browser, you can use the hiveview tool. Build it with:

go build ./cmd/hiveview

Run it like this to start the HTTP server:

./hiveview --serve --logdir ./workspace/logs

This command runs a web interface on http://127.0.0.1:8080. The interface shows information about all simulation runs for which information was collected.

Generating Ethereum 1.x test chains (hivechain)

The hivechain tool allows you to create RLP-encoded blockchains for inclusion into simulations. Build it with:

go build ./cmd/hivechain

To generate a chain of a desired length, run the following command:

./hivechain generate -genesis ./genesis.json -length 200

hivechain generates empty blocks by default. The chain will contain non-empty blocks if the following accounts have balance in genesis state. You can find the corresponding private keys in the hivechain source code.

  • 0x71562b71999873DB5b286dF957af199Ec94617F7
  • 0x703c4b2bD70c169f5717101CaeE543299Fc946C7
  • 0x0D3ab14BBaD3D99F4203bd7a11aCB94882050E7e