I have a user interactive shell script that runs successfully on my Linux server. But when I try to run it via jenkins, it doesn't run.
I have created a Jenkinsfile.
Jenkinsfile
node('slaves') {
try
{
def app
stage('Remmove Docker service') {
sh 'sshpass ssh docusr#10.26.13.12 "/path/to/shell/script"'
}
}
}
Shell Script
#!/bin/bash
read -p "Hi kindly enter the api name : " api
docker service logs $api --raw
The shell Scipt runs successfully on my local server, when I try to run it on Jenkins using Jenkinsfile, it doesn't accept $api variable in my shell script which is user interactive.
What you are trying to achieve doesn't serve any purpose of automating your job by jenkins, if I correctly understood. So, your job is actually seeking a user input and it's in best interest to have a parameterized jenkins build in this case.
For your case, you can still give an argument to the sshpass command $api and have it read from the jenkins environment itself Or, better make your jenkins build parameterized and use your user input $api as the parameter.
I've set up a home based CI server for working with a personal project. Below you can see what happens for the branch "staging". It works fine, however the problems with such a pipeline config are:
1) The only way to stop the instance seem to be to abort the build in jenkins whiсh leads to the exit code 143 and build marked as red instead of green
2) If the machine reboots I have to trigger build manually
3) I suppose there should be a better way of handling this?
Thanks
stage('Staging') {
when {
branch 'staging'
}
environment {
NODE_ENV = 'production'
}
steps {
sh 'docker-compose -f docker-compose/staging.yml build'
sh 'docker-compose -f docker-compose/staging.yml up --abort-on-container-exit'
}
post {
always {
sh 'docker-compose -f docker-compose/staging.yml rm -f -s'
sh 'docker-compose -f docker-compose/staging.yml down --rmi local --remove-orphans'
}
}
}
So, what's the goal here? Are you trying to deploy to staging? If so, what do you mean by that? If jenkins is to launch a long running process (say a docker container running a webserver) then the shell command line must be able to start and then have its exit status tell jenkins pipeline if the start was successful.
One option is to wrap the docker compose in a script that executes, checks and exits with the appropriate exit code. Another is to use yet another automation tool to help (e.g. ansible)
The first question remains, what are you trying to get jenkins to do and how on the commandline will that work. If you can model the command line then you can encapsulate in a script file and have jenkins start it.
Jenkins pipeline code looks like groovy and is much like groovy. This can make us believe that adding complex logic to the pipeline is a good idea, but this turns jenkins into our IDE and that's hard to debug and a trap into which I've fallen several times.
A somewhat easier approach is to have some other tool allow you to easily test on the commandline and then have jenkins build the environment in which to run that command line process. Jenkins handles what it is good at:
scheduling jobs
determining on which nodes jobs run
running steps in parallel
making the output pretty or easily understood by we carbon based life forms.
I am using parallel stages.
Here is a minimum example:
pipeline {
agent any
options {
parallelsAlwaysFailFast() // https://stackoverflow.com/q/54698697/4480139
}
stages {
stage('Parallel') {
parallel {
stage('docker-compose up') {
steps {
sh 'docker-compose up'
}
}
stage('test') {
steps {
sh 'sleep 10'
sh 'docker-compose down --remove-orphans'
}
}
}
}
}
post {
always {
sh 'docker-compose down --remove-orphans'
}
}
}
I have a jenkins pipeline that builds a java artifact,
copies it to a directory and then attempts to execute a external script.
I am using this syntax within the pipeline script to execute the external script
dir('/opt/script-directory') {
sh './run.sh'
}
The script is just a simple docker build script, but the build will fail
with this exception:
java.io.IOException: Failed to mkdirs: /opt/script-directory#tmp/durable-ae56483c
The error is confusing because the script does not create any directories. It is just building a docker image and placing the freshly built java artifact in that image.
If I create a different job in jenkins that executes the external script as
its only build step and then call that job from my pipeline script using this syntax:
build 'docker test build'
everything works fine, the script executes within the other job and the pipeline
continues as expected.
Is this the only way to execute a script that is external to the workspace?
What am I doing wrong with my attempt at executing the script from within
the pipeline script?
The issue is that the jenkins user (or whatever the user is that runs the Jenkins slave process) does not have write permission on /opt and the sh step wants to create the script-directory#tmp/durable-ae56483c sub-directory there.
Either remove the dir block and use the absolute path to the script:
sh '/opt/script-directory/run.sh'
or give write permission to jenkins user to folder /opt (not preferred for security reasons)
Looks like a bug in Jenkins, durable directories are meant to store recovery information e.g. before executing an external script using sh.
For now all you can do is make sure that /opt/script-directory has +r +w and +x set for jenkins user.
Another workaround would be not to change the current directory, just execute sh with it:
sh '/opt/script-directory/run.sh'
I had a similar concern when trying to execute a script in a Jenkins pipeline using a Jenkinsfile.
I was trying to run a script restart_rb.sh with sudo.
To run it I specified the present working directory ($PWD):
sh 'sudo sh $PWD/restart_rb.sh'
When writing jenkins pipelines it seems to be very inconvenient to commit each new change in order to see if it works.
Is there a way to execute these locally without committing the code?
You cannot execute a Pipeline script locally, since its whole purpose is to script Jenkins. (Which is one reason why it is best to keep your Jenkinsfile short and limited to code which actually deals with Jenkins features; your actual build logic should be handled with external processes or build tools which you invoke via a one-line sh or bat step.)
If you want to test a change to Jenkinsfile live but without committing it, use the Replay feature added in 1.14.
JENKINS-33925 tracks the feature request for an automated test framework.
I have a solution that works well for me. It consists of a local jenkins running in docker and a git web hook to trigger the pipeline in the local jenkins on every commit. You no longer need to push to your github or bitbucket repository to test the pipeline.
This has only been tested in a linux environment.
It is fairly simple to make this work although this instruction is a tad long. Most steps are there.
This is what you need
Docker installed and working. This is not part of this instruction.
A Jenkins running in docker locally. Explained how below.
The proper rights (ssh access key) for your local Jenkins docker user to pull from your local git repo. Explained how below.
A Jenkins pipeline project that pulls from your local git repository. Explained below.
A git user in your local Jenkins with minimal rights. Explained below.
A git project with a post-commit web hook that triggers the pipeline project. Explained below.
This is how you do it
Jenkins Docker
Create a file called Dockerfile in place of your choosing. I'm placing it in /opt/docker/jenkins/Dockerfile fill it with this:
FROM jenkins/jenkins:lts
USER root
RUN apt-get -y update && apt-get -y upgrade
# Your needed installations goes here
USER jenkins
Build the local_jenkins image
This you will need to do only once or after you have added something to the Dockerfile.
$ docker build -t local_jenkins /opt/docker/jenkins/
Start and restart local_jenkins
From time to time you want to start and restart jenkins easily. E.g. after a reboot of your machine. For this I made an alias that I put in .bash_aliases in my home folder.
$ echo "alias localjenkinsrestart='docker stop jenkins;docker rm jenkins;docker run --name jenkins -i -d -p 8787:8080 -p 50000:50000 -v /opt/docker/jenkins/jenkins_home:/var/jenkins_home:rw local_jenkins'" >> ~/.bash_aliases
$ source .bash_aliases # To make it work
Make sure the /opt/docker/jenkins/jenkins_home folder exists and that you have user read and write rights to it.
To start or restart your jenkins just type:
$ localjenkinsrestart
Everything you do in your local jenkins will be stored in the folder /opt/docker/jenkins/jenkins_home and preserved between restarts.
Create a ssh access key in your docker jenkins
This is a very important part for this to work. First we start the docker container and create a bash shell to it:
$ localjenkinsrestart
$ docker exec -it jenkins /bin/bash
You have now entered into the docker container, this you can see by something like jenkins#e7b23bad10aa:/$ in your terminal. The hash after the # will for sure differ.
Create the key
jenkins#e7b23bad10aa:/$ ssh-keygen
Press enter on all questions until you get the prompt back
Copy the key to your computer. From within the docker container your computer is 172.17.0.1 should you wonder.
jenkins#e7b23bad10aa:/$ ssh-copy-id user#172.17.0.1
user = your username and 172.17.0.1 is the ip address to your computer from within the docker container.
You will have to type your password at this point.
Now lets try to complete the loop by ssh-ing to your computer from within the docker container.
jenkins#e7b23bad10aa:/$ ssh user#172.17.0.1
This time you should not need to enter you password. If you do, something went wrong and you have to try again.
You will now be in your computers home folder. Try ls and have a look.
Do not stop here since we have a chain of ssh shells that we need to get out of.
$ exit
jenkins#e7b23bad10aa:/$ exit
Right! Now we are back and ready to continue.
Install your Jenkins
You will find your local Jenkins in your browser at http://localhost:8787.
First time you point your browser to your local Jenkins your will be greated with a Installation Wizard.
Defaults are fine, do make sure you install the pipeline plugin during the setup though.
Setup your jenkins
It is very important that you activate matrix based security on http://localhost:8787/configureSecurity and give yourself all rights by adding yourself to the matrix and tick all the boxes. (There is a tick-all-boxes icon on the far right)
Select Jenkins’ own user database as the Security Realm
Select Matrix-based security in the Authorization section
Write your username in the field User/group to add: and click on the [ Add ] button
In the table above your username should pop up with a people icon next to it. If it is crossed over you typed your username incorrectly.
Go to the far right of the table and click on the tick-all-button or manually tick all the boxes in your row.
Please verify that the checkbox Prevent Cross Site Request Forgery exploits is unchecked. (Since this Jenkins is only reachable from your computer this isn't such a big deal)
Click on [ Save ] and log out of Jenkins and in again just to make sure it works.
If it doesn't you have to start over from the beginning and emptying the /opt/docker/jenkins/jenkins_home folder before restarting
Add the git user
We need to allow our git hook to login to our local Jenkins with minimal rights. Just to see and build jobs is sufficient. Therefore we create a user called git with password login.
Direct your browser to http://localhost:8787/securityRealm/addUser and add git as username and login as password.
Click on [ Create User ].
Add the rights to the git user
Go to the http://localhost:8787/configureSecurity page in your browser. Add the git user to the matrix:
Write git in the field User/group to add: and click on [ Add ]
Now it is time to check the boxes for minimal rights to the git user. Only these are needed:
overall:read
job:build
job:discover
job:read
Make sure that the Prevent Cross Site Request Forgery exploits checkbox is unchecked and click on [ Save ]
Create the pipeline project
We assume we have the username user and our git enabled project with the Jenkinsfile in it is called project and is located at /home/user/projects/project
In your http://localhost:8787 Jenkins add a new pipeline project. I named it hookpipeline for reference.
Click on New Item in the Jenkins menu
Name the project hookpipeline
Click on Pipeline
Click [ OK ]
Tick the checkbox Poll SCM in the Build Triggers section. Leave the Schedule empty.
In the Pipeline section:
select Pipeline script from SCM
in the Repository URL field enter user#172.17.0.1:projects/project/.git
in the Script Path field enter Jenkinsfile
Save the hookpipeline project
Build the hookpipeline manually once, this is needed for the Poll SCM to start working.
Create the git hook
Go to the /home/user/projects/project/.git/hooks folder and create a file called post-commit that contains this:
#!/bin/sh
BRANCHNAME=$(git rev-parse --abbrev-ref HEAD)
MASTERBRANCH='master'
curl -XPOST -u git:login http://localhost:8787/job/hookpipeline/build
echo "Build triggered successfully on branch: $BRANCHNAME"
Make this file executable:
$ chmod +x /home/user/projects/project/.git/hooks/post-commit
Test the post-commit hook:
$ /home/user/projects/project/.git/hooks/post-commit
Check in Jenkins if your hookpipeline project was triggered.
Finally make some arbitrary change to your project, add the changes and do a commit. This will now trigger the pipeline in your local Jenkins.
Happy Days!
TL;DR
Jenkins Pipeline Unit testing framework
Jenkinsfile Runner
Long Version
Jenkins Pipeline testing becomes more and more of a pain. Unlike the classic declarative job configuration approach where the user was limited to what the UI exposed the new Jenkins Pipeline is a full fledged programming language for the build process where you mix the declarative part with your own code. As good developers we want to have some unit tests for this kind of code as well.
There are three steps you should follow when developing Jenkins Pipelines. The step 1. should cover 80% of the uses cases.
Do as much as possible in build scripts (eg. Maven, Gradle, Gulp etc.). Then in your pipeline scripts just calls the build tasks in the right order. The build pipeline just orchestrates and executes the build tasks but does not have any major logic that needs a special testing.
If the previous rule can't be fully applied then move over to Pipeline Shared libraries where you can develop and test custom logic on its own and integrate them into the pipeline.
If all of the above fails you, you can try one of those libraries that came up recently (March-2017). Jenkins Pipeline Unit testing framework or pipelineUnit (examples). Since 2018 there is also Jenkinsfile Runner, a package to execution Jenkins pipelines from a command line tool.
Examples
The pipelineUnit GitHub repo contains some Spock examples on how to use Jenkins Pipeline Unit testing framework
Jenkins has a 'Replay' feature, which enables you to quickly replay a job without updating sources:
At the moment of writing (end of July 2017) with the Blue Ocean plugin you can check the syntax of a declarative pipeline directly in the visual pipeline editor. The editor, works from the Blue Ocean UI when you click "configure" only for github projects (this is a known issue and they are working to make it work also on git etc).
But, as explained in this question you can open the editor browsing to:
[Jenkins URL]/blue/organizations/jenkins/pipeline-editor/
Then click in the middle of the page, and press Ctrl+S, this will open a textarea where you can paste a pipeline declarative script. When you click on Update, if there is a syntax error, the editor will let you know where the syntax error is. Like in this screenshot:
If there is no syntax error, the textarea will close and the page will visualize your pipeline. Don't worry it won't save anything (if it's a github project it would commit the Jenkinsfile change).
I'm new to Jenkins and this is quite helpful, without this I had to commit a Jenkinsfile many times, till it works (very annoying!). Hope this helps. Cheers.
A bit late to the party, but that's why I wrote jenny, a small reimplementation of some core Jenkinsfile steps. (https://github.com/bmustiata/jenny)
In my development setup – missing a proper Groovy editor – a great deal of Jenkinsfile issues originates from simple syntax errors. To tackle this issue, you can validate the Jenkinsfile against your Jenkins instance (running at $JENKINS_HTTP_URL):
curl -X POST -H $(curl '$JENKINS_HTTP_URL/crumbIssuer/api/xml?xpath=concat(//crumbRequestField,":",//crumb)') -F "jenkinsfile=<Jenkinsfile" $JENKINS_HTTP_URL/pipeline-model-converter/validate
The above command is a slightly modified version from
https://github.com/jenkinsci/pipeline-model-definition-plugin/wiki/Validating-(or-linting)-a-Declarative-Jenkinsfile-from-the-command-line
As far as i know this Pipeline Plugin is the "Engine" of the new Jenkinsfile mechanics, so im quite positive you could use this to locally test your scripts.
Im not sure if there is any additional steps needed when you copy it into a Jenkinsfile, however the syntax etc should be exactly the same.
Edit: Found the reference on the "engine", check this feature description, last paragraph, first entry.
For simplicity, you can create a Jenkinsfile at the root of the git repository, similar to the below example 'Jenkinsfile' based on the groovy syntax of the declarative pipeline.
pipeline {
agent any
stages {
stage('Build the Project') {
steps {
git 'https://github.com/jaikrgupta/CarthageAPI-1.0.git'
echo pwd()
sh 'ls -alrt'
sh 'pip install -r requirements.txt'
sh 'python app.py &'
echo "Build stage gets finished here"
}
}
stage('Test') {
steps {
sh 'chmod 777 ./scripts/test-script.sh'
sh './scripts/test-script.sh'
sh 'cat ./test-reports/test_script.log'
echo "Test stage gets finished here"
}
}
}
https://github.com/jaikrgupta/CarthageAPI-1.0.git
You can now set up a new item in Jenkins as a Pipeline job.
Select the Definition as Pipeline script from SCM and Git for the SCM option.
Paste the project's git repo link in the Repository URL and Jenkinsfile in the script name box.
Then click on the lightweight checkout option and save the project.
So whenever you pushed a commit to the git repo, you can always test the changes running the Build Now every time in Jenkins.
Please follow the instructions in the below visuals for easy setup a Jenkins Pipeline's job.
Aside from the Replay feature that others already mentioned (ditto on its usefulness!), I found the following to be useful as well:
Create a test Pipeline job where you can type in Pipeline code or point to your repo/branch of a Jenkinsfile to quickly test out something. For more accurate testing, use a Multibranch Pipeline that points to your own fork where you can quickly make changes and commit without affecting prod. Stuff like BRANCH_NAME env is only available in Multibranch.
Since Jenkinsfile is Groovy code, simply invoke it with "groovy Jenkinsfile" to validate basic syntax.
Put your SSH key into your Jenkins profile, then use the declarative linter as follows:
ssh jenkins.hostname.here declarative-linter < Jenkinsfile
This will do a static analysis on your Jenkinsfile. In the editor of your choice, define a keyboard shortcut that runs that command automatically. In Visual Studio Code, which is what I use, go to Tasks > Configure Tasks, then use the following JSON to create a Validate Jenkinsfile command:
{
"version": "2.0.0",
"tasks": [
{
"label": "Validate Jenkinsfile",
"type": "shell",
"command": "ssh jenkins.hostname declarative-linter < ${file}"
}
]
}
You can just validate your pipeline to find out syntax issues. Jenkins has nice API for Jenkisfile validation - https://jenkins_url/pipeline-model-converter/validate
Using curl and passing your .Jenkinsfile, you will get syntax check instantly
curl --user username:password -X POST -F "jenkinsfile=<jenkinsfile" https://jenkins_url/pipeline-model-converter/validate
You can add this workflow to editors:
VS Code
Sublime Text
Using the VS Code Jenkins Jack extension, you can have a way to test your Jenkinsfiles without use the git push way, from your local files to a local or remote running Jenkins. And you will have the running log of the job inside VS Code, the ability to create jobs in Jenkins and more staff. I hope this help to more people looking for a way to develop Jenkinsfiles.
i am using replay future , to do some update and run quickly .
With some limitations and for scripted pipelines I use this solution:
Pipeline job with an inlined groovy script:
node('master') {
stage('Run!') {
def script = load('...you job file...')
}
}
Jenkinsfile for testing have same structure as for lesfurets:
def execute() {
... main job code here ...
}
execute()
This is a short solution that lets me test Pipeline code very quickly:
pipeline {
agent any
options {
skipDefaultCheckout true
timestamps()
}
parameters {
text(name: 'SCRIPT', defaultValue: params.SCRIPT,
description: 'Groovy script')
}
stages {
stage("main") {
steps {
script {
writeFile file: 'script.groovy',
text: params.SCRIPT
def groovyScript = load 'script.groovy'
echo "Return value: " + groovyScript
}
} // steps
} // stage
} // stages
} // pipeline
skipDefaultCheckout true because we do not need the files in this tool git repository.
defaultValue: params.SCRIPT sets the default to the latest execution. If used by just one user, it allows for a very quick cycle of short tests.
The given script is written to a file, and loaded and with load.
With this setup I can test everything I can do inside my other Jenkinsfiles, including using shared libraries.