I m trying to run docker with Jenkins pipeline but I m facing this Jenkins pipeline error and a socket io error

Question

I’m trying to execute a docker image within a Jenkins pipeline but I always come across this error. Any help?

Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.26/containers/hello-world/json: dial unix /var/run/docker.sock: connect: permission denied.

Answer 1

This happens when the Jenkins user is not added to the docker group. So first try to create a Jenkins user and add the user to the docker group. Follow the below steps:

1. Create a docker group if you haven’t done it already. 

$ sudo groupadd docker

2. Create a Jenkins user and add it to the docker group.

$ sudo usermod -aG docker $USER

3. Log off, restart your Jenkins and try executing the program. If you’re still getting the same error then change the access permission of the /var/run/docker.sock  by using the following command.

$ chmod 777 /var/run/docker.sock

Ready to level up your Docker skills? Enroll now in our comprehensive Docker Course!

Comments

Thank you Man

---

I was struggling immensely on this part..this is what made my day...huge huge thanks

---

Btw

chmod 777

is the worst security practice ever. The suffice should be to add the jenkins user to docker group and do a service restart of jenkins.

---

I totally agree with you @Jai. I think it should only be used in the worst-case scenario.

---

1. After adding jenkins user to docker group,

2. RUN -> newgrp docker

3. Restart the jenkins

---

Thank you so much vignesh.

RUN -> newgrp docker

This saved my day!

---

this is save my time too, Thank you for your comment

Answer 2

Add Jenkins user to Docker group.

Answer 3

Change the permissions of the file:

$ chmod 777 /var/run/docker.sock

Comments

Thanks! That worked for me! :)

---

Thanks that worked for me...... Very useful.........

---

thank you so much you saved me

---

thank you ,so much..this really worked

---

Thank you for your contribution. Please upvote the answer in case you found it helpful.

Cheers!

---

"chmod 777 /var/run/docker.sock" is working only one time. The next time I start and stop my EC2 instance, the job fails with error "dial unix /var/run/docker.sock: connect: permission denied".

I have already performed: "sudo groupadd docker" & "sudo usermod -aG docker $USER"

The issue still persists. Do you have any other suggestions?

---

Did you mount this folder with your container?

Answer 4

bash into container as root user - docker exec -it --user root <dc5> bash

add user to docker group - usermod -aG docker jenkins

change permissions - chmod 777 /var/run/docker.sock