How to fix docker: Got permission denied while trying to connect to the Docker daemon socket

Posted on August 12, 2019
Docker Linux Basics Ubuntu
Asked by bitmap

I’ve just installed docker but I have to run it with sudo every time. If I don’t add sudo I get the following error:

Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.40/containers/json: dial unix /var/run/docker.sock: connect: permission denied
Is there a way around that? I want to be able to run docker without having to type my password each time…


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                Bobby Iliev
               
               
                
                 Site Moderator
                
                
               
               
                •
               
               
                August 12, 2019


                
                
                 Accepted Answer

Hello,


               
                According to the official Docker docs here:
               
               
                
                 https://docs.docker.com/install/linux/linux-postinstall/#manage-docker-as-a-non-root-user
                
               
               
                You need to do the following:
               
               
                To create the docker group and add your user:
               
               
                Create the docker group.
               
               sudo groupadd docker
Add your user to the docker group.
sudo usermod -aG docker ${USER}
You would need to loog out and log back in so that your group membership is re-evaluated or type the following command:
su -s ${USER}
Verify that you can run docker commands without sudo.
docker run hello-world
This command downloads a test image and runs it in a container. When the container runs, it prints an informational message and exits.
If you initially ran Docker CLI commands using sudo before adding your user to the docker group, you may see the following error, which indicates that your ~/.docker/ directory was created with incorrect permissions due to the sudo commands.
WARNING: Error loading config file: /home/user/.docker/config.json -
stat /home/user/.docker/config.json: permission denied
To fix this problem, either remove the ~/.docker/ directory (it is recreated automatically, but any custom settings are lost), or change its ownership and permissions using the following commands:
sudo chown "$USER":"$USER" /home/"$USER"/.docker -R
sudo chmod g+rwx "$HOME/.docker" -R
Here’s also a quick video demo on how to do this:
    View YouTube video
Hope that this helps!
Regards,
Bobby


                
                 
                  
                   
                    
                     
                      
                       sagarjethi
                      
                      
                       •
                      
                      
                       January 21, 2020

After an upgrade I got the permission denied. Doing the steps of ‘mkb’ post install steps don’t have change anything because my user was already in the ‘docker’ group; I retry-it twice any way without success.


                
                 
                  
                   
                    
                     
                      
                       After an search hour this following solution finaly worked :
                      
                      sudo chmod 666 /var/run/docker.sock


                 
                  
                   
                    
                     
                      
                       
                        
                         srikantsncr
                        
                        
                         •
                        
                        
                         October 17, 2019

While doing production config i got the permission issue.I tried below solution to resolve the issue.


                 
                  
                   
                    
                     
                      
                       
                        
                         
                          Error Message
                         
                         **
                        
                            ubuntu@node1:~$ docker run hello-world
    docker: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.38/containers/create: dial unix /var/run/docker.sock: connect: permission denied.
    See 'docker run --help'.
Solution:permissions of the socket indicated in the error message, /var/run/docker.sock:
    ubuntu@ip-172-31-21-106:/var/run$ ls -lrth docker.sock
    srw-rw---- 1 root root 0 Oct 17 11:08 docker.sock
    ubuntu@ip-172-31-21-106:/var/run$ sudo chmod 666 /var/run/docker.sock
    ubuntu@ip-172-31-21-106:/var/run$ ls -lrth docker.sock
    srw-rw-rw- 1 root root 0 Oct 17 11:08 docker.sock
After changes permission for docket.sock then execute below command to check permissions.
ubuntu@ip-172-31-21-106:/var/run$ docker run hello-world
    Unable to find image 'hello-world:latest' locally
    latest: Pulling from library/hello-world
    1b930d010525: Pull complete
    Digest: sha256:c3b4ada4687bbaa170745b3e4dd8ac3f194ca95b2d0518b417fb47e5879d9b5f
    Status: Downloaded newer image for hello-world:latest
    Hello from Docker!
    This message shows that your installation appears to be working correctly.
    To generate this message, Docker took the following steps:
     1. The Docker client contacted the Docker daemon.
     2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
        (amd64)
     3. The Docker daemon created a new container from that image which runs the
        executable that produces the output you are currently reading.
     4. The Docker daemon streamed that output to the Docker client, which sent it
        to your terminal.
    To try something more ambitious, you can run an Ubuntu container with:
     $ docker run -it ubuntu bash
    Share images, automate workflows, and more with a free Docker ID: