I am running a jenkins docker application (https://hub.docker.com/r/jenkinsci/blueocean/)
I am trying to do a docker run on jenkins but received this error:Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
I tried doing : sudo usermod -aG docker jenkins but it said that jenkins user does not exist. I tried doing add admin also but it said it does not exists also.
What am i doing wrong?
I presume that docker service is up & running, if not verify it by running below command -
$ sudo systemctl status docker.service
Run below command to make it work -
$ sudo usermod -aG docker $USER
Log out/in to activate the changes to groups
Explanation -
Change user jenkins with the username which you are logged in on your host -
$ sudo usermod -aG docker $USER
Do a echo $USER to view your current user.
Log out/in to activate the changes to groups, then you can do a docker run ..... successfully.
Note - Jenkins user exists inside the docker container & not on your host machine.
Ref - https://docs.docker.com/install/linux/linux-postinstall/
Check below settings,
The user with which you are running docker run command might not be able to connect with docker, so in that case you need to do
usermod -aG docker <username>
After this, logout from current session, and login again.
Check your docker service
systemctl status docker.service
If not running,
systemctl start docker.service
Related
Even though my user is on docker group and I can launch docker without sudo, and I'm running idea.sh from my user, whenever I try to connect to docker from within Intellij Idea docker plugin, I get
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
I'm trying the Unix socket method. I already tried multiple restarts and logout.
I'm on Ubuntu 20.04 and Intellijd Idea 2020.3
Adding current user to docker group worked for me:
sudo gpasswd -a ${USER} docker
You might need to create group first:
sudo groupadd docker
restart your OS after those changes
For me it work
sudo chmod 0777 /var/run/docker.sock
Then test this in the terminal without the sudo
docker ps -a
normally you should have access to the docker process
In order to fix a docker issue in Jenkins, I need to run the following commands:
$ sudo usermod -aG docker tomcat #add the tomcat user to the docker group
$ sudo service docker restart #restart the docker service
The next step is to log out of the session (close the terminal window) and log back in (re-open the terminal window). This is easy from an actual terminal window, but how do we instruct Jenkins to simulate a logout and log back in?
It looks like you are trying to configure your user to access the docker socket. The restart of the engine isn't needed, nor is it necessary to exit the shell:
$ sudo usermod -aG docker tomcat #add the tomcat user to the docker group
$ newgrp docker #recognize the new group membership
I have set a private pipeline with linux vm and agent is install and in the portal it shows that the agent is active. I also have install docker. In the same machine if I use sudo docker it works. So I am sure it is a permission issues when the VSTS agent is running the command. Not sure what which user i need to give which premission so that docker command will run when I initial a build from VSTS.
Got permission denied while trying to connect to the Docker daemon
socket at unix:///var/run/docker.sock: Post
http://%2Fvar%2Frun%2Fdocker.sock/v.37/build?buildargs=%7B%7D&cachefrom=%5B]&cgroupparent=&cpuperiod=0&cpuquota=0&cpusetcpus=&cpusetmems=&cpushares=0&dockerfile=Dockerfile&labels=%7B%7D&memory=0&memswap=0&networkmode=default&rm=&session=a53bebddc77c89993b6e464d9f2a56fac9b***e62***094***fe70355df2c8dfcf***8b9&shmsize=0&t=mycontainerreg.azurecr.io%2Ftk-dashboard%3A853&target=&ulimits=null:
dial unix /var/run/docker.sock: connect: permission denied
/usr/bin/docker failed with return code: ***
In VSTS, it's the build service account which execute entire build pipeline. This account should also run the command.
Note, the service is setting up during the configuration of build agent. You can run the build agent as a systemd service. More details please refer to this tutorial.
You will need to grant appropriate permissions. The user just needs to be added to the group docker.
sudo usermod -a -G docker user
Also restart the systemd service and try to trigger the build again.
First of all, check if the docker group was created.
If the gourp does not exist -> https://www.digitalocean.com/community/questions/how-to-fix-docker-got-permission-denied-while-trying-to-connect-to-the-docker-daemon-socket
Then
usermod -aG docker $USER
usermod -aG root $USER
chmod 777 /var/run/docker.sock
I had to run following commands to get rid off this issue:
sudo usermod -aG docker vstsbuildagent
# check docker group
grep 'docker' /etc/group
usermod -aG root vstsbuildagent
sudo systemctl restart docker
# your build agent process
sudo systemctl stop vsts********
sudo systemctl start vsts********
I would like to run Docker shell commands on Jenkins like:
docker ps
Is it possible to do it with out using any plugins? Since Jenkins isn't a user, but a service account how can I add to docker group?
First execute
sudo groupadd docker
Then execute
sudo usermod -aG docker $USER
Then logout its important to logout because your group membership is re-evaluated
Login and try again
docker ps
It works!
Following approach worked for me to run docker commands without any plugins
Rather than adding jenkins user to docker group, allowed jenkins user to run sudo commands with out prompting for password and then created an alias to avoid sudo in Dockerfile for jenkins slave. I had to install docker client in the container which connects to daemon running in the host machine.
## allowing jenkins user to run sudo commands
RUN echo "jenkins ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers
## avoid typing sudo in command line
RUN echo "alias docker='sudo docker '" >> /home/jenkins/.bashrc
(Taken from this answer: https://askubuntu.com/a/477554)
If you run on Ubuntu and Jenkins runs directly on the host machine (i.e. not inside a Docker container):
Add the docker group if it doesn't already exist:
sudo groupadd docker
Add the user "jenkins" to the docker group:
sudo gpasswd -a jenkins docker
Restart the Docker daemon:
sudo service docker restart
Either do a newgrp docker or log out/in to activate the changes to groups.
I had the issue when I was running from jenkins pipeline. I added jenkins user to docker group, restarted the docker engine and rebooted the machine as well. However I still get the same error dial unix /var/run/docker.sock: connect: permission denied.
Finally I added jenkins to root group and it resolved my issue (ubuntu 18.04) (VM on Azure)
sudo gpasswd -a jenkins root
sudo service docker restart
I am trying to run my Docker commands, but I am facing the notification error in the title. I tried running:
ps auxww | grep docker
but still getting the error. Any solution?
If you can verify that the docker daemon is running then it may be that your user is not allowed to access docker.
To do this add yourself to the docker group.
sudo usermod -aG docker <userid>
Remember to do a re-login or otherwise apply/activate the new group permission.
newgrp docker
How about launching the daemon
sudo service docker start
should do the trick.
Or
sudo docker -d
In my case I had multiple docker instances running so it didn't know what to attach to. After killing them and restarting, my problem was solved.