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

Hi.

While am installing the volume of one image, via this command

docker run -it -v "$(pwd)":/data1 ubuntu

I got an error bout metadata and docker can not start " [Docker fails to start due to "volume store metadata database: timeout] "
so to solve this problem .

1- stope the docker and killed dokerd
2- rm /var/lib/docker/volumes/metadata.db
3- systemctl start docker

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

no matter what I did, I start the daemon on a terminal like this
dockerd

INFO[2021-09-20T01:15:48.913749465Z] Starting up
INFO[2021-09-20T01:15:48.916434292Z] parsed scheme: "unix"                         module=grpc
INFO[2021-09-20T01:15:48.916497400Z] scheme "unix" not registered, fallback to default scheme  module=grpc
INFO[2021-09-20T01:15:48.916564792Z] ccResolverWrapper: sending update to cc: {[{unix:///run/containerd/containerd.sock  <nil> 0 <nil>}] <nil> <nil>}  module=grpc
INFO[2021-09-20T01:15:48.916595962Z] ClientConn switching balancer to "pick_first"  module=grpc
INFO[2021-09-20T01:15:48.918298067Z] parsed scheme: "unix"                         module=grpc
INFO[2021-09-20T01:15:48.918347733Z] scheme "unix" not registered, fallback to default scheme  module=grpc
INFO[2021-09-20T01:15:48.918388393Z] ccResolverWrapper: sending update to cc: {[{unix:///run/containerd/containerd.sock  <nil> 0 <nil>}] <nil> <nil>}  module=grpc
INFO[2021-09-20T01:15:48.918413515Z] ClientConn switching balancer to "pick_first"  module=grpc
INFO[2021-09-20T01:15:48.939329092Z] [graphdriver] using prior storage driver: overlay
WARN[2021-09-20T01:15:48.939396810Z] [graphdriver] WARNING: the overlay storage-driver is deprecated, and will be removed in a future release
WARN[2021-09-20T01:15:48.952809659Z] Unable to find blkio cgroup in mounts
WARN[2021-09-20T01:15:48.952852651Z] Unable to find pids cgroup in mounts
INFO[2021-09-20T01:15:48.953507004Z] Loading containers: start.
INFO[2021-09-20T01:15:50.470316608Z] Default bridge (docker0) is assigned with an IP address 172.17.0.0/16. Daemon option --bip can be used to set a preferred IP address
INFO[2021-09-20T01:15:50.820419866Z] Loading containers: done.
INFO[2021-09-20T01:15:50.845100091Z] Docker daemon                                 commit=75249d8 graphdriver(s)=overlay version=20.10.8
INFO[2021-09-20T01:15:50.845282164Z] Daemon has completed initialization
INFO[2021-09-20T01:15:50.891007247Z] API listen on /var/run/docker.sock

I opened a new terminal to test
docker ps -l
it just hang and did not return any output.

and if I restart the service again, I will have the same error once I want to start docker
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

[MAX]root:[/root]cat /etc/os-release
NAME="CloudLinux"
VERSION="7.9 (Boris Yegorov)"
ID="cloudlinux"
ID_LIKE="rhel fedora centos"
VERSION_ID="7.9"
PRETTY_NAME="CloudLinux 7.9 (Boris Yegorov)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:cloudlinux:cloudlinux:7.9:GA:server"
HOME_URL="https://www.cloudlinux.com/"
BUG_REPORT_URL="https://www.cloudlinux.com/support"

[MAX]root:[/root]docker version
Client: Docker Engine - Community
 Version:           20.10.8
 API version:       1.41
 Go version:        go1.16.6
 Git commit:        3967b7d
 Built:             Fri Jul 30 19:55:49 2021
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.8
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.16.6
  Git commit:       75249d8
  Built:            Fri Jul 30 19:54:13 2021
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.9
  GitCommit:        e25210fe30a0a703442421b0f60afac609f950a3
 runc:
  Version:          1.0.1
  GitCommit:        v1.0.1-0-g4144b63
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0
[MAX]root:[/root]docker info
Client:
 Context:    default
 Debug Mode: false
 Plugins:
  app: Docker App (Docker Inc., v0.9.1-beta3)
  buildx: Build with BuildKit (Docker Inc., v0.6.1-docker)
  scan: Docker Scan (Docker Inc., v0.8.0)

Server:
 Containers: 27
  Running: 0
  Paused: 0
  Stopped: 27
 Images: 6
 Server Version: 20.10.8
 Storage Driver: overlay
  Backing Filesystem: extfs
  Supports d_type: true
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Cgroup Version: 1
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: runc io.containerd.runc.v2 io.containerd.runtime.v1.linux
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: e25210fe30a0a703442421b0f60afac609f950a3
 runc version: v1.0.1-0-g4144b63
 init version: de40ad0
 Security Options:
  seccomp
   Profile: default
 Kernel Version: 3.10.0-962.3.2.lve1.5.42.el7.x86_64
 Operating System: CloudLinux 7.9 (Boris Yegorov)
 OSType: linux
 Architecture: x86_64
 CPUs: 24
 Total Memory: 125.7GiB
 Name: server3.maximagroup.net
 ID: EPU2:7UOG:4ZC2:4VSU:S3K6:JYEW:FOXD:FH5G:EW4O:MKKO:EG7H:YPJM
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false

WARNING: No blkio throttle.read_bps_device support
WARNING: No blkio throttle.write_bps_device support
WARNING: No blkio throttle.read_iops_device support
WARNING: No blkio throttle.write_iops_device support
WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled
WARNING: the overlay storage-driver is deprecated, and will be removed in a future release.
[MAX]root:[/root]

and yes I did review Post-installation steps for Linux | Docker Documentation
and nothing help