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

[i-kj]

Hello all,
When I tried to run carla inside my docker container I am gettint the below error:

[smit@in-dev-docker:/apollo/carla_apollo_bridge/scripts/carla_apollo_bridge/scri
pts]$ ./docker_run_carla.sh
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

I tried trouble shooting the issue. I did the following:

1. I checked the docker status outside the docker container in my host environment using: sudo systemctl status docker

docker.service - Docker Application Container Engine
Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
Active: active (running) since Thu 2023-08-17 13:30:22 CEST; 19min ago
TriggeredBy: ● docker.socket
Docs: https://docs.docker.com

and found the docker is active.

2. I checked if daemon is running or not using: **ps aux | grep docker**
   [smit@in-dev-docker:/apollo/carla_apollo_bridge/scripts/carla_apollo_bridge/scripts]$ ps aux | grep docker
   root 1465 0.0 0.2 2353352 77612 ? Ssl 13:30 0:01 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
   smit 4423 0.0 0.0 1550080 24568 pts/0 Sl+ 13:42 0:00 docker exec -u smit -ti d6bc44b5f114 bash -c cd /apollo/carla_apollo_bridge/scripts && bash
   smit 5179 0.0 0.0 11480 996 pts/2 S+ 13:53 0:00 grep --color=auto docker

so I understood that the daemon is running but I assumed I might have some accessibility issue. so I checked: groups

[smit@in-dev-docker:/apollo/carla_apollo_bridge/scripts/carla_apollo_bridge/scripts]$ groups
smit sudo audio video

I perfomed: sudo usermod -aG docker smit

I restarted my machine and retried to run docker_run_carla.sh again and got the same issue...

smit@in-dev-docker:/apollo/carla_apollo_bridge/scripts/carla_apollo_bridge/scri
pts]$ ./docker_run_carla.sh
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

I am clueless on what to do next. I am ready to provide any additional information to help me get this done. Any help would be really appreciated.

Thank you.

Please note that I cloned carla apollo bridge inside docker container. Can you please guide me in the right direction.

[XiaoFei9704]

Please try:

sudo usermod -aG docker $USER

And run ./docker_run_carla.sh again

[i-kj]

Thank you for your reply.

[smit@in-dev-docker:/apollo/carla_apollo_bridge/scripts/carla_apollo_bridge/scri
pts]$ sudo usermod -aG docker $USER
usermod: group 'docker' does not exist

Please note that I cloned and trying to run docker_run_carla.sh inside my docker container. Also when I tried cloning carla apollo bridge in my host machine, I could successfully launch docker_run_carla.sh. But I am not sure if that is correct. I am really beginner in this. Please help.

Also if I had ran docker_run_carla.sh on host machine and have CARLA running successfully, would the CARLA simulation be accessible on host machine? so I can continue with the CARLA Apollo Bridge setup within the Docker container.

[XiaoFei9704]

Before run docker_run_carla.sh on host machine, please edit scripts
/carla-compose.yml
Delete the following:

ports:
            - "2000:2000"
            - "2001:2001"
            - "2002:2002"

And then you can access carla by localhost:2000

[i-kj]

Thanks it helped.

but I am facing a new problem wherein Carla 0.9.14 is lauching itself many times despite closing it since I installed apollo bridge. I restarted my PC but still the issue is existing. Can you please help?

mit@smit-BUSINESSline:~$ ps aux | grep carla
smit 13352 0.0 0.0 4644 796 ? Ss 11:51 0:00 /bin/sh ./CarlaUE4.sh -quality-level=Low -carla-rpc-port=2000
smit 13389 324 16.9 7724804 5499712 ? Sl 11:51 15:29 /home/carla/CarlaUE4/Binaries/Linux/CarlaUE4-Linux-Shipping CarlaUE4 -quality-level=Low -carla-rpc-port=2000
smit 13487 0.0 0.0 10000 720 pts/2 S+ 11:56 0:00 grep --color=auto carla

even after killing the PID, it still launches. Also i have carla 0.9.13 already installed but because of always active 0.9.14 ..i could launch it for some of my other works.

[XiaoFei9704]

See the last line of scripts/carla-compose.yml:
restart: always
If you do not want Carla to auto-restart, just delete it

[i-kj]

I deleted restart: always and saved but still CARLAUE4 is launching.
I really appreciate your help so far. Can you please help me on this as well?

_version: '3.7'
services:
simulator:
image: carlasim/carla:0.9.14
logging:
options:
max-size: "10m"
max-file: "3"
privileged: true
environment:
SDL_VIDEODRIVER: x11
DISPLAY: $DISPLAY
ports:
- "2000:2000"
- "2001:2001"
- "2002:2002"
network_mode: "host"
deploy:
resources:
reservations:
devices:
- driver: nvidia
count: 1
capabilities: ["gpu"]

    command: ./CarlaUE4.sh  -quality-level=Low -carla-rpc-port=2000
    volumes:
        - /tmp/.X11-unix:/tmp/.X11-unix:rw
        - /etc/localtime:/etc/localtime
        - /etc/timezone:/etc/timezone_