Project: BigchainDB (App Definition and Development / Database)
File: run-node-as-processes.md

<! Copyright 2020 Interplanetary Database Association e.V., BigchainDB and IPDB software contributors. SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0) Code is Apache-2.0 and docs are CC-BY-4.0 > The following doc describes how to run a local node for developing BigchainDB Tendermint version. There are two crucial dependencies required to start a local node: MongoDB Tendermint and of course you also need to install BigchainDB Sever from the local code you just developed. MongoDB can be easily installed, just refer to their for your distro. We know MongoDB 3.4 and 3.6 work with BigchainDB. After the installation of MongoDB is complete, run MongoDB using `sudo mongod` The version of BigchainDB Server described in these docs only works well with Tendermint 0.31.5 (not a higher version number). Install that: ```bash $ sudo apt install -y unzip $ wget https://github.com/tendermint/tendermint/releases/download/v0.31.5/tendermintv0.31.5linux_amd64.zip $ unzip tendermintv0.31.5linux_amd64.zip $ rm tendermintv0.31.5linux_amd64.zip $ sudo mv tendermint /usr/local/bin ``` Tendermint can be run directly using the docker image. Refer for more details. Before we can begin installing Tendermint one should ensure that the Golang is installed on system and `$GOPATH` should be set in the `.bashrc` or `.zshrc`. An example setup is shown below ```bash $ echo $GOPATH /home/user/Documents/go $ go -h Go is a tool for managing Go source code. Usage: go command [arguments] The commands are: build compile packages and dependencies clean remove object files ... ``` We can drop `GOPATH` in `PATH` so that installed Golang packages are directly available in the shell. To do that add the following to your `.bashrc` ```bash export PATH=${PATH}:${GOPATH}/bin ``` Follow to install Tendermint from source. If the installation is successful then Tendermint is installed at `$GOPATH/bin`. To ensure Tendermint's installed fine execute the following command, ```bash $ tendermint -h Tendermint Core (BFT Consensus) in Go Usage: tendermint [command] Available Commands: gen_validator Generate new validator keypair help Help about any command init Initialize Tendermint ... ``` We can initialize and run tendermint as follows, ```bash $ tendermint init ... $ tendermint node --consensus.createemptyblocks=false ``` The argument `--consensus.createemptyblocks=false` specifies that Tendermint should not commit empty blocks. To reset all the data stored in Tendermint execute the following command, ```bash $ tendermint unsaferesetall ``` To install BigchainDB from source (for dev), clone the repo and execute the following command, (it is better that you create a virtual env for this) ```bash $ git clone https://github.com/bigchaindb/bigchaindb.git $ cd bigchaindb $ pip install -e .[dev] # or pip install -e '.[dev]' # for zsh ``` To execute tests when developing a feature or fixing a bug one could use the following command, ```bash $ pytest -v ``` NOTE: MongoDB and Tendermint should be running as discussed above. One could mark a specific test and execute the same by appending `-m my_mark` to the above command. Although the above should prove sufficient in most cases but in case tests are failing on Travis CI then the following command can be used to possibly replicate the failure locally, ```bash $ docker-compose run --rm --no-deps bdb pytest -v --cov=bigchaindb ``` NOTE: before executing the above command the user must ensure that they reset the Tendermint container by executing `tendermint usaferesetall` command in the Tendermint container.