Docker service fails to start due to dependency - docker

Question

I have docker 20.10.6 & CentOS 7.5
-bash-4.2$ docker version
Client: Docker Engine - Community
Version: 20.10.6
API version: 1.41
Go version: go1.13.15
Git commit: 370c289
Built: Fri Apr 9 22:45:33 2021
OS/Arch: linux/amd64
Context: default
Experimental: true
when I try to run the service with
sudo systemctl start docker
I get an error of
A dependency job for docker.service failed. See 'journalctl -xe' for details.
systemctl returns this
systemctl status docker.service
● docker.service - Docker Application Container Engine
Loaded: loaded (/etc/systemd/system/docker.service; disabled; vendor preset: disabled)
Active: inactive (dead)
Docs: https://docs.docker.com
I am following the guide from https://docs.docker.com/engine/install/centos/
I have tried reinstalling docker & dependencies, tried creating a /etc/docker/daemon.json file with the contents
{
"storage-driver": "overlay2"
}
but no success
The command
export VERSION_STRING=20.10.6
sudo yum install docker-ce-${VERSION_STRING} docker-ce-cli-${VERSION_STRING} containerd.io
indicates no missing dependency
The logs in journalctl are not very informative:
sudo journalctl -fu docker
-- Logs begin at .... --
Dependency failed for Docker Application Container Engine.
systemd[1]: Job docker.service/start failed with result 'dependency'.
systemd[1]: Dependency failed for Docker Application Container Engine.
systemd[1]: Job docker.service/start failed with result 'dependency'.
systemd[1]: Dependency failed for Docker Application Container Engine.
systemd[1]: Job docker.service/start failed with result 'dependency'.
systemd[1]: Dependency failed for Docker Application Container Engine.
systemd[1]: Job docker.service/start failed with result 'dependency'.

Answer 1

The following made the trick
sudo /usr/bin/dockerd -H unix://
So I start the docker engine that way, and I can start running containers, etc.