ERROR: Couldn't connect to Docker daemon at http://0.0.0.0:2375

I am watching a course on Hyperledger Composer development online. I installed all the required prerequisites, docker, docker-compose, nodejs, golang. After cloning the fabric-samples repository from github. There is a file called byfn.sh inside a folder called first-network. On running the command ./byfn.sh up, it's giving the following error:

If, someone has experience working on it, please help. Any help would be appreciated. Thank you.

CodePudding user response：

I think the first thing you should do is stop looking at or trying to use Hyperledger Composer. It is end of life now and some of it's components will have problems even if you install the exact required versions (for example the rest server fails to launch now on node 8 but changing to a newer version of node may break other parts of Composer).

As you had planned to use it with hyperledger fabric I would suggest that you just invest your time in Hyperledger fabric, see https://hyperledger-fabric.readthedocs.io/en/latest/

Regarding your problem with docker, I suspect you tried to install docker through the apt command in your wsl window ? I'm guessing that you are using WSL2, but if you are using WSL1 then docker will never work in a WSL1 environment. If it was WSL2 then the docker daemon doesn't automatically start in that environment you need to start it yourself first. I think the command is service docker start. The important thing here is to make sure you are using WSL2 and not WSL1 (see hyperledger fabric link later which provides guidance on making sure you are using WSL2).

An alternative to installing docker into WSL2 directly would be to install Docker Desktop for Windows and follow the hyperledger fabric instructions here https://hyperledger-fabric.readthedocs.io/en/latest/prereqs.html#wsl2

CodePudding user response：

It seems that you install your docker under WSL, but you run the command through Windows Powershell. You can try a virtual machine. Docker only can run in Unix() system. It's difficult to use docker on Windows. You can use VS code to connect the virtual machine on your Windows, then run the command on the powershell of VS code.