Issue
My Jenkins is not run in Docker container, just tradional install to VPS. I got the following error when executing a simple test project. I am using Ubuntu 14, java 7, and stable Jenkins. I tried all methods I can find on google, but can't get it work.
I am trying to execute this shell
docker build --pull=true -t nick/hello-jenkins:$GIT_COMMIT .
After code change.
Here is error:
Got permission denied while trying to connect to the Docker daemon socket at unix: ....
Started by user nicolas xu
Building in workspace /var/lib/jenkins/workspace/hello-Jenkins
> git rev-parse --is-inside-work-tree # timeout=10
Fetching changes from the remote Git repository
> git config remote.origin.url https://github.com/nicolasxu/hello-nick-jenkins.git # timeout=10
Fetching upstream changes from https://github.com/nicolasxu/hello-nick-jenkins.git
> git --version # timeout=10
> git fetch --tags --progress https://github.com/nicolasxu/hello-nick-jenkins.git +refs/heads/*:refs/remotes/origin/*
> git rev-parse refs/remotes/origin/master^{commit} # timeout=10
> git rev-parse refs/remotes/origin/origin/master^{commit} # timeout=10
Checking out Revision d94ae21a8a2cf58ffc790dcad15bd851fb17df5a (refs/remotes/origin/master)
> git config core.sparsecheckout # timeout=10
> git checkout -f d94ae21a8a2cf58ffc790dcad15bd851fb17df5a
> git rev-list d94ae21a8a2cf58ffc790dcad15bd851fb17df5a # timeout=10
[hello-Jenkins] $ /bin/sh -xe /tmp/hudson5076309502904684976.sh
+ docker build --pull=true -t nick/hello-jenkins:d94ae21a8a2cf58ffc790dcad15bd851fb17df5a .
Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.27/build?buildargs=%7B%7D&cachefrom=%5B%5D&cgroupparent=&cpuperiod=0&cpuquota=0&cpusetcpus=&cpusetmems=&cpushares=0&dockerfile=Dockerfile&labels=%7B%7D&memory=0&memswap=0&networkmode=default&pull=1&rm=1&shmsize=0&t=nick%2Fhello-jenkins%3Ad94ae21a8a2cf58ffc790dcad15bd851fb17df5a&ulimits=null: dial unix /var/run/docker.sock: connect: permission denied
Build step 'Execute shell' marked build as failure
Finished: FAILURE
I can run 'docker' in console as root no problem, why jenkins can't try a shell command which runs 'docker'? What is going on? Totally confused.......
Solution
In your VPS server terminal, do this to add your jenkins user to the docker group:
sudo usermod -aG docker jenkins
Then restart your jenkins server to refresh the group.
Take into account any security issue that this could produce:
Warning: The docker group grants privileges equivalent to the root user. For details on how this impacts security in your system, see Docker Daemon Attack Surface.
Refer to the docs
Edit (mentioned by @iger): Just make sure to restart the Jenkins from command-line (i.e. sudo service jenkins restart), but not through the rest endpoint (http:///restart)
Answered By - Robert
Answer Checked By - Robin (JavaFixing Admin)
