Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

[universeroc]

• This is a bug report
• This is a feature request
• I searched existing issues before opening this one

Expected behavior

docker daemon started

Actual behavior

Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

Steps to reproduce the behavior

1. docker pull ubuntu:18.04
2. docker run -it ubuntu:18.04 /bin/bash
3. apt update && apt install docker
4. service docker start

Output of docker version:

Docker version 18.09.7, build 2d0083d

Output of docker info:

Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

Additional environment details (AWS, VirtualBox, physical, etc.)
docker client is Docker for Desktop on Windows 10

[cpuguy83]

You can't run docker in a container without --privileged.
You'll also likely need to -v /var/lib/docker.

In fact there is an official image for running docker-in-docker: docker:dind

[niv-breez]

I am getting the same error.
The command I use:
docker run -i --privileged -v /var/lib/docker -t my-docker:my-tag /bin/bash