Brownie console running in Vagrant couldnt connect to ganache running on Host.

[GraphicalDot]

Environment information

• brownie Version: 1.6.7
• ganache-cli Version: 2.1.2
• solc Version: 0.6.2
• Python Version: 3.7.6
• OS: linux

What was wrong?

I am running ganache on my ubuntu host and running brownie project on a vagrant machine with ubuntu version18.04.
Brownie couldn't connect to the ganache but web3.py can.
My config file for brownie is

# Brownie configuration file
# https://eth-brownie.readthedocs.io/en/stable/config.html
network:
    default: development # the default network that brownie connects to
    settings:
        gas_limit: "auto"
        gas_price: "auto"
        persist: true
        reverting_tx_gas_limit: false  # if false, reverting tx's will raise without broadcasting
    networks:
        # any settings given here will replace the defaults
        development:
            host: http://172.28.128.1
            gas_price: 0
            persist: false
            reverting_tx_gas_limit: 6721975
            test_rpc:
                cmd: ganache-cli
                port: 3399
                gas_limit: 6721975
                accounts: 10
                evm_version: istanbul
                mnemonic: brownie
        # set your Infura API token to the environment variable WEB3_INFURA_PROJECT_ID
        mainnet:
            host: https://mainnet.infura.io/v3/$WEB3_INFURA_PROJECT_ID
        goerli:
            host: https://goerli.infura.io/v3/$WEB3_INFURA_PROJECT_ID
        kovan:
            host: https://kovan.infura.io/v3/$WEB3_INFURA_PROJECT_ID
        rinkeby:
            host: https://rinkeby.infura.io/v3/$WEB3_INFURA_PROJECT_ID
        ropsten:
            host: https://ropsten.infura.io/v3/$WEB3_INFURA_PROJECT_ID
        classic:
            host: https://www.ethercluster.com/etc
        kotti:
            host: https://www.ethercluster.com/kotti
pytest:
    # these settings replace the defaults when running pytest
    gas_limit: 6721975
    default_contract_owner: true
    reverting_tx_gas_limit: 6721975
    revert_traceback: true
compiler:
    evm_version: null
    minify_source: false
    solc:
        version: null
        optimize: true
        runs: 200

The port is open on host to accept new connections which can be checked with netstat.

tcp        0      0 127.0.0.1:2222          0.0.0.0:*               LISTEN      -                   
tcp        0      0 127.0.0.53:53           0.0.0.0:*               LISTEN      -                   
tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN      -                   
tcp        0      0 127.0.0.1:5949          0.0.0.0:*               LISTEN      -                   
tcp        0      0 0.0.0.0:445             0.0.0.0:*               LISTEN      -                   
tcp        0      0 172.28.128.1:3399       0.0.0.0:*               LISTEN      9425/Ganache        

• what command you ran

(ERC721Implementation) vagrant@ethereum:~/EthereumProjects/ERC721Implementation$ ipython
Python 3.7.6 (default, Dec 19 2019, 23:50:13) 
Type 'copyright', 'credits' or 'license' for more information
IPython 7.13.0 -- An enhanced Interactive Python. Type '?' for help.

In [1]: import os 
   ...: from web3 import Web3, HTTPProvider                                                                                                                                                                                                                                                                             

In [2]: w3 = Web3(HTTPProvider('http://172.28.128.1:3399'))                                                                                                                                                                                                                                                             

In [3]: w3.eth.accounts                                                                                                                                                                                                                                                                                                 
Out[3]: 
['0xd5373B59FDF14e9F1f5cc858eCAE0e6662FfedC1',
 '0x533D7aa17435Ee227FdC30BA94fF8a509532D776',
 '0x40E29Ca2269785f2F53d7E41006FC83eb3df4D0a',
 '0x537f82751024Ed22F9f943e32A30e47B5A1Da6Df',
 '0x28556574cfE7331738FadEE2fb6eC2630A9C142b',
 '0xfe96534827B237951d4Ab4018Ff8c014B8918521',
 '0xF32D5DfeCf6e1F6Fb2b29DF29Aba8fBd6bCB9D9E',
 '0x88fdA9f0938A1fB5C5C902aeA8Bf28dE76d5467f',
 '0xf6FAdCF3e805E61B1051A610a38365c74310ecCc',
 '0x42904B9429E8d0599b90d6E24dF578684c0E03d3']

In [4]: !brownie console                                                                                                                                                                                                                                                                                                
Brownie v1.6.7 - Python development framework for Ethereum

ErcImplementationProject is the active project.
  File "brownie/_cli/__main__.py", line 57, in main
    importlib.import_module(f"brownie._cli.{cmd}").main()
  File "brownie/_cli/console.py", line 44, in main
    network.connect(ARGV["network"])
  File "brownie/network/main.py", line 42, in connect
    rpc.attach(host)
  File "brownie/network/rpc.py", line 122, in attach
    raise ProcessLookupError("Could not find RPC process.")
ProcessLookupError: Could not find RPC process.

How can it be fixed?

Fill this in if you know how the bug could be fixed.

[iamdefinitelyahuman]

Thanks for letting me know! I have an idea what the issue is, will take a look.

A workaround is to let brownie launch ganache itself rather than attaching to an already running process.

[GraphicalDot]

If the ganache is running locally then brownie doesn't have any problems connecting to it.

[iamdefinitelyahuman]

I think handled in #972