In my Manage Jenkins > Global Tool Configuration, i have already configured a tool called "docker" as follows:
name: docker
install automatically: CHECKED
docker version: latest
Then all I have in my jenkinsfile is the following and nothing else:
node {
DOCKER_HOME = tool "docker"
sh """
echo $DOCKER_HOME
ls $DOCKER_HOME/bin/
$DOCKER_HOME/bin/docker images
$DOCKER_HOME/bin/docker ps -a
"""
}
I get an error like this "Cannot connect to the Docker daemon. Is the docker daemon running on this host?".
Following is the full console log:
Started by user Syed Rakib Al Hasan
[Pipeline] node
Running on master in /var/jenkins_home/workspace/helloDocker
[Pipeline] {
[Pipeline] tool
[Pipeline] sh
[helloDocker] Running shell script
+ echo /var/jenkins_home/tools/org.jenkinsci.plugins.docker.commons.tools.DockerTool/docker
/var/jenkins_home/tools/org.jenkinsci.plugins.docker.commons.tools.DockerTool/docker
+ ls /var/jenkins_home/tools/org.jenkinsci.plugins.docker.commons.tools.DockerTool/docker/bin/
docker
+ /var/jenkins_home/tools/org.jenkinsci.plugins.docker.commons.tools.DockerTool/docker/bin/docker images
Cannot connect to the Docker daemon. Is the docker daemon running on this host?
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
ERROR: script returned exit code 1
Finished: FAILURE
How do i ensure that the docker daemon/service is running/started before my pipeline reaches the line to run docker commands.
Is there any other native docker-build-step plugin way to achieve what I am doing here? Like docker ps -a or docker images or docker build -t?
Some assumptions:
Let's say my chosen node do not already have docker/docker-engine installed/running in my host machine. That's the purpose of the tool command to automatically install docker in the node if it is not already there.
This Jenkins plugin is for the docker client; I'd solve (work around) by:
setting up jenkins slaves where docker daemon is reachable, add a label
setting up a housekeeping job which will fail if docker daemon was not reachable (so we can notify the infra team without having the QA to figure out and escalate the problem)
assign jobs which assumes the docker daemon to be reachable to this label
I hope it helps, and I'm curious if any of you have a better solution!
Related
i wanted to create a docker image with jenkins but Cannot connect to the Docker daemon .
this is my pipeline
pipeline {
agent any
options { buildDiscarder(logRotator(numToKeepStr:'5'))}
environment {DOCKERHUB_CREDENTIALS = credentials('tfkben-dockerhub')}
stages {
stage('build'){ steps { sh 'docker build -t tfkben/ben:latest .' } }
stage('Login'){ steps { sh 'echo $DOCKERHUB_CREDENTIALS_PSW | docker login -u $DOCKERHUB_CREDENTIALS_USR --password-stdin ' }}
stage('Push'){ steps { sh 'docker push tfkben/ben:latest'} }
}
post { always { sh 'docker logout' }}
}
my Dockerfile :
FROM python:3.11-rc-bullseye
WORKDIR /app
COPY requirements.txt requirements.txt
RUN pip3 install -r requirements.txt
COPY . .
CMD [ "python3", "manage.py", "runserver", "0.0.0.0:8000"]
and this is the error message :
docker build -t tfkben/ben:latest .
Cannot connect to the Docker daemon at tcp://docker:2376. Is the docker daemon running?
#Toufik Benkhelifa It seems you don't have docker installed in your jenkins agent. Where is your Jenkins agent is resided? There are couple of possibilities here.
If you are using any Linux distros OS(Ubuntu, Redhat, centos etc) as Jenkins agent, then you can install docker daemon explicitly in that agent.
Reference: https://docs.docker.com/engine/install/
If you are running the agent as a docker container, then you can do something similar to below
Lets say you have both Jenkins master and Jenkins agent running as docker nodes.
Where,
Jenkins Master is actually running within Docker as a Docker container
Jenkins Agent is running within Docker as a Docker container
Now the Jenkins Master is communicating with the host Docker via Docker Demon in tcp://host.docker.internal:2375
Once the Jenkins Master is connected with Docker Demon, it can then safely communicate with any containers running within that Docker host via the Demon, since it will have all the networking information to talk with different containers, in this case it's going to be a Docker container running Jenkins agent.
Now, Link Jenkins Master with Docker Host Daemon. In order to do that, you need to use "Docker plugin for Jenkins" https://plugins.jenkins.io/docker-plugin/
The aim of this docker plugin is to be able to use a Docker host to dynamically provision a docker container as a Jenkins agent node, let that run a single build, then tear-down that node, without the build process (or Jenkins job definition) requiring any awareness of docker.
Once the plugin is installed, all we need to do is to configure Jenkins to add new cloud from Jenkins -> Manage -> System configuration and add new cloud as 'Docker'
Finally, as mentioned earlier, the Docker demon will be running on
tcp://host.docker.internal:2375
which needs to be the Docker Host URI
Reference : https://blog.executeautomation.com/running-jenkins-build-agent-within-docker-container-part-a/
It is likely due to your Jenkins agent not having a Docker daemon running within it.
If the agent itself is running as a Docker container, then you need to ensure that it uses an image that has “Docker-in-Docker” (dind)
I am trying to run the pipeline example of python.
I am able to start Jenkins in Docker and connect to Git but I get "docker not found" error when trigger the job:
+ docker inspect -f . python:3.5.1
/var/jenkins_home/workspace/example-project#tmp/durable-6edc6c68/script.sh: 1: /var/jenkins_home/workspace/example-project#tmp/durable-6edc6c68/script.sh: docker: not found
[Pipeline] isUnix
[Pipeline] sh
+ docker pull python:3.5.1
/var/jenkins_home/workspace/example-project#tmp/durable-bd8f56f3/script.sh: 1: /var/jenkins_home/workspace/example-project#tmp/durable-bd8f56f3/script.sh: docker: not found
[Pipeline] }
[Pipeline] // withEnv
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
ERROR: script returned exit code 127
I have also referred to other online solution by adding Docker to be install automatically in Global Tool Configuration:
However, my Jenkins in Docker container is unable to connect to Docker Daemon when I configure the Docker plugin
On the other hand, my another Jenkins that is installed in Window 10 is able to connect to Docker Daemon. Therefore, may I know what can goes wrong?
This question already has answers here:
Docker not found when building docker image using Docker Jenkins container pipeline
(7 answers)
Closed 1 year ago.
I've added the BitBucket server integration plugin (https://plugins.jenkins.io/atlassian-bitbucket-server-integration/) and can connect to the BitBucket cloud repo from Jenkins:
But I receive an error when I try to build:
/var/jenkins_home/workspace/bb_add-jenkins-file#tmp/durable-c49dbeca/script.sh: 1: /var/jenkins_home/workspace/bb_add-jenkins-file#tmp/durable-c49dbeca/script.sh: docker: not found
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
[Bitbucket] Notifying commit build result
[Bitbucket] Build result notified
ERROR: script returned exit code 127
Finished: FAILURE
So it seems I need to install Docker on the Jenkins instance ?
https://plugins.jenkins.io/docker-build-publish/
I'm following this tutorial to configure Docker with Jenkins: https://medium.com/#karthi.net/docker-tutorial-build-docker-images-using-jenkins-d2880e65b74
and have reached this step:
On my own Jenkins Docker setup page I have :
I'm unsure what Docker URL should be used? Do I need to provision a new container instance within the Kubernetes cluster and run docker within this new instance? This new Docker instance is then the Docker Host URI field?
I think that plugin requires the docker cli to be present.
If you run jenkins as a docker image itself, use an image that provides the docker cli, for example https://hub.docker.com/r/trion/jenkins-docker-client
If you want to use the host docker daemon for building, you need to bind-mount the docker socket.
If you want to use a sidecar container to provide the docker daemon, for example using a docker-in-docker setup you can usually use the container name as docker host or kubernetes service name. This depends on how you provide the sidecar container and there is no general answer to that.
I'm attempting to build a branch using Jenkins and a 'docker in the docker' container to build a container from src.
I define the Docker cloud instance here:
Should an extra tab be available that enable the job to use the Docker cloud instance setup above?
The job is a multi-branch pipeline:
But when I attempt to configure a job that uses the docker cloud instance, configured above, the option to build with docker is not available:
The build log contains:
time="2021-04-04T14:27:16Z" level=error msg="failed to dial gRPC:
cannot connect to the Docker daemon. Is 'docker daemon' running on
this host?: dial unix /var/run/docker.sock: connect: no such file or
directory" error during connect: Post
http://%2Fvar%2Frun%2Fdocker.sock/v1.40/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&rm=1&session=vgpahcarinxfh05klhxyk02gg&shmsize=0&t=ron%2Fml-services&target=&ulimits=null&version=1:
context canceled [Pipeline] } [Pipeline] // stage [Pipeline] }
[Pipeline] // node [Pipeline] End of Pipeline [Bitbucket] Notifying
commit build result [Bitbucket] Build result notified ERROR: script
returned exit code 1 Finished: FAILURE
which suggests the build is searching for Docker on the same host as Jenkins, but I'm attempting to build with Docker on a different host?
Have I configured Docker with Jenkins correctly?
My Jenkinsfile contains:
node {
def app
stage('Clone repository') {
checkout scm
}
stage('Build image') {
app = docker.build("ron/services")
}
stage('Push image') {
docker.withRegistry('https://registry.hub.docker.com', 'git') {
app.push("${env.BUILD_NUMBER}")
app.push("latest")
}
}
}
Update:
Clicking the checkmark at Expose DOCKER_HOST , rebuilding contains error:
+ docker build -t ron/services .
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
[Bitbucket] Notifying commit build result
[Bitbucket] Build result notified
ERROR: script returned exit code 1
Finished: FAILURE
The docker cli tries to connect using the docker socket in /var/run. This means that no external daemon is configured, for example using the environment variable DOCKER_HOST.
Try clicking the checkmark at Expose DOCKER_HOST.
Not clear if this is what you are trying to do, but configuring Docker cloud will tell your Jenkins to launch a container on 10.241.0.198 (client), and run your jenkins job in that container. To make this work, there are a couple of things to check:
ensure that jenkins user on jenkins server can access port 2371 on client, ie 'Test Connection' returns success
Turn on 'Expose DOCKER_HOST' if you want to use docker in the container
configure ssh so that jenkins user on jenkins server can ssh to the container when it's running on the client (CMD ["/usr/sbin/sshd", "-D"] in Dockerfile)
In Docker Agent Template: configure a label; turn on 'enabled'; configure a docker image to run in the container; set Remote filesystem Root: /home/jenkins
In Container Settings: (very important!!) add /var/run/docker.sock:/var/run/docker.sock to Volumes
To get your Pipeline job to run on the docker image, set the agent label to the label you provided in step 4.
A couple of gotchas when creating the image to run in the container:
install both openssh-clients and openssh-server
install java
install any other build tools you might need, eg git
install docker if you want docker in docker support
configure for sftp in /etc/ssh/sshd_config eg, Add
# override default of no subsystems
Subsystem sftp /usr/lib/openssh/sftp-server
Match group sftp
X11Forwarding no
AllowTCPForwarding no
ForceCommand internal-sftp
I am currently experimenting with Docker in combination with Jenkins to streamline the CI/CD workflow for a new project. I do so on a Mac with Docker 1.12 installed.
This is what I do:
Use docker machine to create a new Docker server
Use the official Jenkins Docker image to spin up a Jenkins instance on that server
Install the "Yet Another Docker Plugin" and "CloudBees Docker Pipeline" plugins.
Add a "Docker Cloud" using the IP of the Docker server above and the third party Docker DinD image tehranian/dind-jenkins-slave
With this setup, I run a very simple pipeline job like this:
node('docker') {
docker.image('hseeberger/scala-sbt').inside {
stage 'Checkout'
echo 'We got here!'
}
}
Jenkins spins up a Docker instance as expected and executes the job. So the basic Docker setup is working as expected.
But the Docker command within the job fails. Log output looks something like this:
[Pipeline] node
Still waiting to schedule task
Docker-23ebf3d8dd4f is offline
Running on Docker-23ebf3d8dd4f in /home/jenkins/workspace/docker-test
[Pipeline] {
[Pipeline] sh
[docker-test] Running shell script
+ docker inspect -f . hseeberger/scala-sbt
Cannot connect to the Docker daemon. Is the docker daemon running on this host?
[Pipeline] sh
[docker-test] Running shell script
+ docker pull hseeberger/scala-sbt
Using default tag: latest
Warning: failed to get default registry endpoint from daemon (Cannot connect to the Docker daemon. Is the docker daemon running on this host?). Using system default: https://index.docker.io/v1/
Cannot connect to the Docker daemon. Is the docker daemon running on this host?
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
Now when I browse around for solutions, it is usually mentioned that the Docker socket needs to be provided to the container as a volume, but that doesn't seem to work either.
Since the general setup seems to be working, wouldn't the slave simply have to do the same thing as the Jenkins plugin does to spin up the Docker slave in the first place? That is, use the URL of the Docker server to control it? Since I assume this is an extremely common use-case, there must be a Docker image for Jenkins Docker slaves that can do this out of the box, right? What am I missing?
You might need to set the docker env and use the content of docker-machine env node in your running shellscript.