[FIX] Cannot Connect to the Docker Daemon at ‘unix:///var/run/docker.sock’

If you’re getting the following error when trying to run a docker command:

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

There are a few things that could be causing this problem. First, make sure that the docker daemon is actually running. You can do this by running the following command:

sudo systemctl status docker

If the docker daemon is not running, you can start it with the following command:

sudo systemctl start docker

If the docker daemon is running, but you’re still getting the “Cannot connect to the Docker daemon” error, it could be because the docker daemon is not running as the root user. You can check the user that the docker daemon is running as with the following command:

ps aux | grep docker

If the docker daemon is not running as the root user, you can start it with the following command:

sudo dockerd -H unix:///var/run/docker.sock -H 0.0.0.0:2375

You may also need to add your user to the docker group in order to be able to connect to the docker daemon. You can do this with the following command:

sudo usermod -aG docker $USER

After adding your user to the docker group, you will need to log out and back in for the changes to take effect.

[FIX] Cannot Connect to the Docker Daemon at ‘unix:///var/run/docker.sock’

Symptoms of the issue

If you’re trying to connect to the Docker daemon and you see the following error message, it’s likely that you’re having problems with permissions:

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

There are a few things that could be causing this error message. First, make sure that the Docker daemon is indeed running. You can do this by typing the following command into your terminal:

docker ps

If the Docker daemon is running, you should see a list of running containers. If you don’t see any output from the docker ps command, then the Docker daemon is most likely not running.

Another possibility is that the Docker daemon is running, but you don’t have the necessary permissions to connect to it. By default, the Docker daemon listens for connections on a Unix socket located at /var/run/docker.sock. Only users with root privileges or users in the docker group are allowed to connect to this socket.

If you’re not sure whether you have the necessary permissions, try running the docker ps command again with sudo:

sudo docker ps

If you’re still getting the “Cannot connect to the Docker daemon” error message, then it’s likely that you need to add your user to the docker group. You can do this by typing the following command into your terminal:

sudo usermod -aG docker $USER

After adding your user to the docker group, you’ll need to log out and log back in for the changes to take effect.

If you’re still having trouble connecting to the Docker daemon, please see the Docker documentation for more troubleshooting tips.

How to fix the issue

If you’re getting the error message “Cannot connect to the Docker daemon at ‘unix:///var/run/docker.sock’,” it means that the Docker daemon is not running. This can be caused by a couple of different things.

First, make sure that the Docker daemon is actually running. You can do this by running the “ps” command and seeing if there is a process named “dockerd” running. If not, then you need to start the Docker daemon.

Once the Docker daemon is running, you need to make sure that it is accessible to the user that is trying to connect to it. By default, the Docker daemon can only be accessed by the root user. So, if you’re trying to connect to the Docker daemon as a non-root user, you need to add that user to the “docker” group.

If you’re still having issues connecting to the Docker daemon, it could be due to a firewall blocking access to the Docker socket. By default, the Docker socket is located at “/var/run/docker.sock”. You can check your firewall rules to see if there is a rule blocking access to that socket. If so, you will need to add a rule to allow access.

What could be causing the issue

The most likely cause of this issue is that the Docker daemon is not running. To check if the daemon is running, you can use the ps command. If the daemon is not running, you will need to start it.

Another possibility is that the Docker daemon is not accessible. This could be due to a problem with the Unix socket that Docker is using. To check if this is the case, you can use the netstat command to see if the socket is listening. If it is not, you will need to fix the socket so that it is accessible.

Other possible solutions

If you are still having trouble connecting to the Docker daemon, there are a few other things you can try.

First, make sure that you are running the latest version of Docker. Older versions of Docker may not work with the latest kernel versions.

Second, try running Docker with sudo. This will give you more permissions and may fix the problem.

Third, try changing the permissions on the Docker socket. By default, only the root user can access the Docker socket. You can change this by running the following command:

sudo chmod 666 /var/run/docker.sock

This will allow all users on the system to access the Docker daemon. You can also add your user to the docker group, which will give you access to the Docker daemon without needing to use sudo.

Fourth, try reinstalling Docker. This will fix any problems with your Docker installation.

If you are still having trouble, please contact Docker support.

Must Read

If you’re getting the error Cannot connect to the Docker daemon at unix:///var/run/docker.sock, there are a few things you can try to resolve the issue.

1. Check if the Docker daemon is running

The first thing to check is whether or not the Docker daemon is running. You can do this by running the following command:

sudo systemctl status docker

If the Docker daemon is running, you should see something like this:

docker.service – Docker Application Container Engine
Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
Active: active (running) since Thu 2018-04-19 02:14:53 EDT; 1h 2min ago
Main PID: 964 (dockerd)
Tasks: 16
CGroup: /system.slice/docker.service
└─964 /usr/bin/dockerd -H fd://

If the Docker daemon is not running, you can start it with the following command:

sudo systemctl start docker

2. Check Docker permissions

Another potential issue could be that your user does not have the proper permissions to access the Docker daemon. By default, only members of the docker group have access to the Docker daemon.

You can check to see if you are a member of the docker group with the following command:

groups

If you are not a member of the docker group, you can add yourself with the following command:

sudo usermod -aG docker $USER

After adding yourself to the docker group, you will need to log out and log back in for the changes to take effect.

3. Restart the Docker daemon

If you’ve made any changes to the Docker daemon configuration file, you will need to restart the Docker daemon for the changes to take effect.

You can restart the Docker daemon with the following command:

sudo systemctl restart docker