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Jenkins: how to use variables inside agent docker args?
(1 answer)
Closed 29 days ago.
I have a Jenkins pipeline that uses a Docker agent. I would like for the user to be able to specify which tag from the image repository is used for the pipeline. In the example below, the pipeline has an argument called tag that the user can specify, which is appended to (concatenated) the image argument to the docker agent. The full example is specified below.
#!/usr/bin/env groovy
def call(String tag = 'latest') {
pipeline {
agent {
docker {
image "analytics/rsc:${tag}"
registryUrl 'my.local.registry'
...
}
}
...
}
}
This throws the error
...12: Invalid config option "call" for agent type "docker". Valid config options are [image, alwaysPull, args, containerPerStageRoot, customWorkspace, label, registryCredentialsId, registryUrl, reuseNode] # line 12, column 17.
image analytics/rsc:${tag}
I have tried other variations for the image argument, including
image "analytics/rsc:" + "${tag}"
and
image 'analytics/rsc:' + tag
none of which have worked (I get errors similar to that of the first example, where the variable tag is not evaluated and instead the literal text "tag" is passed.
This is a known problem that is reported as JENKINS-42369. Unfortunately, I don't think they will fix it any time soon, given that it was reported 6 years ago.
You can try this workaround, but workarounds do not work in all cases.
Related
Below is my build.gradle
plugins {
id 'org.springframework.boot' version '2.3.1.RELEASE'
id 'io.spring.dependency-management' version '1.0.9.RELEASE'
id 'java'
id("com.palantir.docker") version "0.25.0"
id("com.palantir.docker-run") version "0.25.0"
}
apply plugin:"com.palantir.docker"
docker { //line 50
name = "dev/${project.name}:${version}"
tag("name", "dev/${project.name}:${version}")
buildArgs(["name", "${project.name}"])
copySpec.from("build").into("build")
pull(true)
dockerfile file('Dockerfile')
}
dockerRun {
name = "${project.name}"
image = "dev/${project.name}:".plus(version)
ports("8080:8080")
}
AM getting the below error during the gradle build
Build file 'build.gradle' line: 50
A problem occurred evaluating root project 'currency-conversion-service'.
> No signature of method: build_8uxeoxw0v35xxabibl49jhru8.docker() is applicable for argument types: (build_8uxeoxw0v35xxabibl49jhru8$_run_closure5) values: [build_8uxeoxw0v35xxabibl49jhru8$_run_closure5#249d76b5]
is this a bug? or am I doing anything wrong?
is this a bug? or am I doing anything wrong?
The latter :P
The annoying thing about Groovy closures in the Gradle DSL is that when you reference something that doesn't exist, it does not always show the exact location of the error.
For instance, everything in the {} block for the docker method could in theory be correct, depending on what context it is executed in. However, when you run it, Groovy says the block isn't valid for the docker method, but doesn't tell you why.
I found that the best way to find the offending line is to just start commenting them out one-by-one until compilation succeeds (though it might fail on other things, which is fine).
In your case, you are passing an array to buildArgs where it really should be a map. To fix it, change it to buildArgs(["name": "${project.name}"]) (notice the colon instead of the comma).
Can an agent label make use of environment variable? Something like this:
pipeline {
environment {
SLAVE_NODE = 'MY_COMPUTER_NAME'
}
agent { label $SLAVE_NODE}
...
Since the editor for pipelines is so small, I would like to have the available space (visible by default) to be the "environment" block, so when I copy a jenkins job I just need to adjust a few environment variables used further in the script... I think I tried all the obvious syntax possibilities by now.
Stumbled upon it by try and error... (and found a duplicate here): Add a string parameter to your jenkins job (e.g. jenkinsNode) and use this in your script:
agent { label "${jenkinsNode}" }
I am developing declarative pipeline and want to use file parameter to read its content, but its not working as expected
parameters{
file(fileLocation:'list.txt', description:'contains list of projects to be build')
}
I am getting following error
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
WorkflowScript: 12: Invalid parameter "fileLocation", did you mean "description"? # line 12, column 14.
file(fileLocation:'release-list.txt', description:'contains list of projects to be build')
Following is another option mentioned for basic step plugin
readFile: Read file from workspace
Reads a file from a relative path (with root in current directory, usually workspace) and returns its content as a plain string.
file
Relative ( /-separated) path to file within a workspace to read.
Type: String
encoding (optional)
Type: String
its working in script step like
def myfile = readFile('list.txt')
echo "${myfile}"
But how to use it directly in declarative script as we used other basic steps like dir??
The correct arguments for the file parameter are name and description. So it should be:
file(name:'list.txt', description:'contains list of projects to be build')
However there's an open jenkins issue dating back from 2015 about the file parameter not working for pipelines, so I don't think even this will solve your issue. https://issues.jenkins-ci.org/browse/JENKINS-27413
Following syntax is working
parameters{
file name:'list.txt', description:'contains list of projects to be build'
}
But fileLocation parameter is not acceptable still.
Below syntax is available in Jenkins2 Up & Running book but its not working
parameters{
file(fileLocation:'list.txt', description:'contains list of projects to be build')
}
Till outstanding issues gets fixed, I believe we may have to stick to freestyle mode & handle things either in downstream pipeline job or within same job leveraging needy plugin feature.
Here is my attempt which looks to work file irrespective (yes supports Binaries as well) types : https://i.stack.imgur.com/vH7mQ.png
${list.txt} will point to right file in your case..
Take a look at the plug-in https://plugins.jenkins.io/file-parameters/.
This plug-in adds support for file parameters in your Jenkinsfile: https://plugins.jenkins.io/file-parameters/#plugin-content-usage-in-declarative-pipeline
parameters {
base64File 'small'
stashedFile 'large'
}
https://github.com/jenkinsci/file-parameters-plugin
We were building our solution without any "Pipeline" in Jenkins until recently, so I'm currently in the progress to move our build to multibranch pipelines.
The issue that I'm running into is that we have a lot of structure une our solution(lot of subfolder, and sometimes some big names).
Currently, the jenkins pipeline extract everything in a folder that looks like:
D:\ws\ght-build_feature_pipelines-TMQ33LB5OQIQ5VXVMFKFDG2HWCD4MUOGEGUWJUOMZ5D2GI42BIQA
Which is very-long, and now we are reaching the 260 characters limit of MSBuild:
C:\Program Files (x86)\Microsoft Visual
Studio\2017\Professional\MSBuild\15.0\Bin\Microsoft.Common.CurrentVersion.targets(2991,5):
error MSB3553: Resource file
"obj\Release\xx.aaaaaaaaaa.yyy.bbbbbb.dddddddddddddd.yyyyyyy.vvv.dddddddddd.Resources.resources"
has an invalid name. The item metadata "%(FullPath)" cannot be applied
to the path
"obj\Release\xx.aaaaaaaaaa.yyy.bbbbbb.dddddddddddddd.yyyyyyy.vvv.dddddddddd.Resources.resources".
The specified path, file name, or both are too long. The fully
qualified file name must be less than 260 characters, and the
directory name must be less than 248 characters.
[D:\ws\ght-build_feature_pipelines-TMQ33LB5OQIQ5VXVMFKFDG2HWCD4MUOGEGUWJUOMZ5D2GI42BIQA\Src\bbbbbb\dddddd\dddddddddddddd\yyyyyyy\xx.aaaaaaaaaa.yyy.bbbbbb.dddddddddddddd.yyyyyyy.vvv\xx.aaaaaaaaaa.yyy.bbbbbb.dddddddddddddd.yyyyyyy.vvv.csproj]
We have so much cases where the length is big that it's really a big job to refactor everything, so I'm looking on how to specify to jenkins a smaller path?
What I finally did:
pipeline {
agent {
node{
label 'windows-node'
customWorkspace "D:\\ws\\${env.BRANCH_NAME}"
}
}
options{
skipDefaultCheckout()
}
...
}
And I've a step that does the checkout. It was easier for me to have a "per-job" behavior, without touching jenkins global settings.
Update (for any recent Jenkins instances)
Turns out that with recent Jenkins versions PATH_MAX seems to be ignored.
The only thing it does: Issue a warning in the Jenkins log when smaller than a certain value, which actually does not matter - as the setting itself will anyways be ignored (as seen on Jenkins 2.249.3). See also: JENKINS-2111
As far as I can tell - the new setting was introduced in jenkins-branch-api 2.0.21:
There's a new property introduced: MAX_LENGTH.
This defaults to 32 characters by default.
You can set it the same way like PATH_MAX:
As a java property - to ensure that Jenkins will start using the right setting, e.g.:
-Djenkins.branch.WorkspaceLocatorImpl.MAX_LENGTH=40
or during run-time, using the script console:
jenkins.branch.WorkspaceLocatorImpl.MAX_LENGTH=40
For older Jenkins instances
Actually there's a java property you can set to specify the length of the directory name, e.g.:
-Djenkins.branch.WorkspaceLocatorImpl.PATH_MAX=20
To make it permanent you have to specify this property in the Jenkins java startup configuration file.
You may also read and write this property using the Jenkins script console for temporary changes or to just give it a try as it takes effect immediately, e.g.
println jenkins.branch.WorkspaceLocatorImpl.PATH_MAX
jenkins.branch.WorkspaceLocatorImpl.PATH_MAX = 20
println jenkins.branch.WorkspaceLocatorImpl.PATH_MAX
Setting this value to 0 changes the path generation behavior.
For details please check:
https://issues.jenkins-ci.org/browse/JENKINS-34564
https://issues.jenkins-ci.org/browse/JENKINS-38706
How can I get build time stamp of the latest build from Jenkins?
I want to insert this value in the Email subject in post build actions.
Build Timestamp Plugin will be the Best Answer to get the TIMESTAMPS in the Build process.
Follow the below Simple steps to get the "BUILD_TIMESTAMP" variable enabled.
STEP 1:
Manage Jenkins -> Plugin Manager -> Installed...
Search for "Build Timestamp Plugin".
Install with or without Restart.
STEP 2:
Manage Jenkins -> Configure System.
Search for 'Build Timestamp' section, then Enable the CHECKBOX.
Select the TIMEZONE, TIME format you want to setup with..Save the Page.
USAGE:
When Configuring the Build with ANT or MAVEN,
Please declare a Global variable as,
E.G. btime=${BUILD_TIMESTAMP}
(use this in your Properties box in ANT or MAVEN Build Section)
use 'btime' in your Code to any String Variables etc..
NOTE: This changed in Jenkins 1.597, Please see here for more info regarding the migration
You should be able to view all the global environment variables that are available during the build by navigating to https://<your-jenkins>/env-vars.html.
Replace https://<your-jenkins>/ with the URL you use to get to Jenkins webpage (for example, it could be http://localhost:8080/env-vars.html).
One of the environment variables is :
BUILD_ID
The current build id, such as "2005-08-22_23-59-59" (YYYY-MM-DD_hh-mm-ss)
If you use jenkins editable email notification, you should be able to use ${ENV, var="BUILD_ID"} in the subject line of your email.
One way this can be done is using shell script in global environment section, here, I am using UNIX timestamp but you can use any shell script syntax compatible time format:
pipeline {
agent any
environment {
def BUILDVERSION = sh(script: "echo `date +%s`", returnStdout: true).trim()
}
stages {
stage("Awesome Stage") {
steps {
echo "Current build version :: $BUILDVERSION"
}
}
}
}
Try use Build Timestamp Plugin and use BUILD_TIMESTAMP variable.
Generate environment variables from script (Unix script) :
echo "BUILD_DATE=$(date +%F-%T)"
I know its late replying to this question, but I have recently found a better solution to this problem without installing any plugin. We can create a formatted version number and can then use the variable created to display the build date/time.
Steps to create: Build Environment --> Create a formatted version number:
Environment Variable Name: BUILD_DATE
Version Number Format String: ${BUILD_DATE_FORMATTED}
thats it. Just use the variable created above in the email subject line as ${ENV, var="BUILD_DATE"} and you will get the date/time of the current build.
You can use the Jenkins object to fetch the start time directly
Jenkins.getInstance().getItemByFullName(<your_job_name>).getBuildByNumber(<your_build_number>).getTime()
also answered it here:
https://stackoverflow.com/a/63074829/1968948
BUILD_ID used to provide this information but they changed it to provide the Build Number since Jenkins 1.597. Refer this for more information.
You can achieve this using the Build Time Stamp plugin as pointed out in the other answers.
However, if you are not allowed or not willing to use a plugin, follow the below method:
def BUILD_TIMESTAMP = null
withCredentials([usernamePassword(credentialsId: 'JenkinsCredentials', passwordVariable: 'JENKINS_PASSWORD', usernameVariable: 'JENKINS_USERNAME')]) {
sh(script: "curl https://${JENKINS_USERNAME}:${JENKINS_PASSWORD}#<JENKINS_URL>/job/<JOB_NAME>/lastBuild/buildTimestamp", returnStdout: true).trim();
}
println BUILD_TIMESTAMP
This might seem a bit of overkill but manages to get the job done.
The credentials for accessing your Jenkins should be added and the id needs to be passed in the withCredentials statement, in place of 'JenkinsCredentials'. Feel free to omit that step if your Jenkins doesn't use authentication.
This answer below shows another method using "regexp feature of the Description Setter Plugin" which solved my problem as I could not install new plugins on Jenkins due to permission issues:
Use build timestamp in setting build description Jenkins
If you want add a timestamp to every request from browser to jenkins server.
You can refer to the jenkins crumb issuer mechanism, and you can hack the /scripts/hudson-behavior.js add modify here. so it will transform a timestamp to server.
/**
* Puts a hidden input field to the form so that the form submission will have the crumb value
*/
appendToForm : function(form) {
// add here. ..... you code
if(this.fieldName==null) return; // noop
var div = document.createElement("div");
div.innerHTML = "<input type=hidden name='"+this.fieldName+"' value='"+this.value+"'>";
form.appendChild(div);
}