can i use variable to specify the agent label in my declarative pipeline ?

[ishan jain]

I am using declarative syntax to build my pipeline. I am loading several
variables from a properties file in the beginning and i now i would like to
control the 'on which slave node something executes' via variables. But i
cannot figure out how to use variable as a agent label. The following is
one of the snippets and like all its other variations, it fails:

properties = null

def loadProperties() {
node {
checkout scm
properties = readProperties file: 'pipeline.properties'
echo "Immediate one ${properties.repo}"
}
}

pipeline {
agent none

stages {

stage ('prepare') {
agent any

steps {
script {
loadProperties()
}
}
}
stage('Build') {

agent { label '${properties.agent}' }

steps {
sh 'hostname'
echo properties.repo
}

}
}
}

[Eric Pyle]

It should work if you use double quotes around your agent variable.
Variable resolution will not happen within single quotes.

Post by ishan jain
I am using declarative syntax to build my pipeline. I am loading
several variables from a properties file in the beginning and i now i
would like to control the 'on which slave node something executes' via
variables. But i cannot figure out how to use variable as a agent
label. The following is one of the snippets and like all its other
|
properties =null
defloadProperties(){
node {
checkout scm
properties =readProperties file:'pipeline.properties'
echo "Immediate one ${properties.repo}"
}
}
pipeline {
agent none
stages {
stage ('prepare'){
agent any
steps {
script {
loadProperties()
}
}
}
stage('Build'){
agent {label '${properties.agent}'}
steps {
sh 'hostname'
echo properties.repo
}
}
}
}
|
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--
Eric Pyle
Siemens PLM Software
Lebanon, NH
[phone]
***@siemens.com
http://www.siemens.com/plm

[ishan jain]

Hi Eric,

I tried putting the var in double quotes but still it is not able to
resolve it. I get *'*There are no nodes with the label ‘null’' error. I am
able to print the value of exact same variable but it seems it is not
resolving the variable name in here. Is there something else i need to do
here ?

Post by Eric Pyle
It should work if you use double quotes around your agent variable.
Variable resolution will not happen within single quotes.
I am using declarative syntax to build my pipeline. I am loading several
variables from a properties file in the beginning and i now i would like to
control the 'on which slave node something executes' via variables. But i
cannot figure out how to use variable as a agent label. The following is
properties = null
def loadProperties() {
node {
checkout scm
properties = readProperties file: 'pipeline.properties'
echo "Immediate one ${properties.repo}"
}
}
pipeline {
agent none
stages {
stage ('prepare') {
agent any
steps {
script {
loadProperties()
}
}
}
stage('Build') {
agent { label '${properties.agent}' }
steps {
sh 'hostname'
echo properties.repo
}
}
}
}
--
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.
For more options, visit https://groups.google.com/d/optout.
--
Eric Pyle
Siemens PLM Software
Lebanon, NH

[Eric Pyle]

OK, so the variable is now being evaluated, but it is not set. Possibly
a variable scoping issue? Can you post the exact code?

Post by ishan jain
Hi Eric,
I tried putting the var in double quotes but still it is not able to
resolve it. I get *'*There are no nodes with the label ‘null’' error.
I am able to print the value of exact same variable but it seems it is
not resolving the variable name in here. Is there something else i
need to do here ?
It should work if you use double quotes around your agent
variable. Variable resolution will not happen within single quotes.

Post by ishan jain
I am using declarative syntax to build my pipeline. I am loading
several variables from a properties file in the beginning and i
now i would like to control the 'on which slave node something
executes' via variables. But i cannot figure out how to use
variable as a agent label. The following is one of the snippets
|
properties =null
defloadProperties(){
node {
checkout scm
properties =readProperties file:'pipeline.properties'
echo "Immediate one ${properties.repo}"
}
}
pipeline {
agent none
stages {
stage ('prepare'){
agent any
steps {
script {
loadProperties()
}
}
}
stage('Build'){
agent {label '${properties.agent}'}
steps {
sh 'hostname'
echo properties.repo
}
}
}
}
|
--
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For more options, visit https://groups.google.com/d/optout
<https://groups.google.com/d/optout>.

--
Eric Pyle
Siemens PLM Software
Lebanon, NH
[phone]
http://www.siemens.com/plm
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For more options, visit https://groups.google.com/d/optout.

--
Eric Pyle
Siemens PLM Software
Lebanon, NH
[phone]
***@siemens.com
http://www.siemens.com/plm

[ishan jain]

Hi Eric,

This the full code that copied earlier. You would only require to create a
properties file. The other echo statements that i have put are printing out
the values just fine.

OK, so the variable is now being evaluated, but it is not set. Possibly a
variable scoping issue? Can you post the exact code?
Hi Eric,
I tried putting the var in double quotes but still it is not able to
resolve it. I get *'*There are no nodes with the label ‘null’' error. I
am able to print the value of exact same variable but it seems it is not
resolving the variable name in here. Is there something else i need to do
here ?

Post by Eric Pyle
It should work if you use double quotes around your agent variable.
Variable resolution will not happen within single quotes.
I am using declarative syntax to build my pipeline. I am loading several
variables from a properties file in the beginning and i now i would like to
control the 'on which slave node something executes' via variables. But i
cannot figure out how to use variable as a agent label. The following is
properties = null
def loadProperties() {
node {
checkout scm
properties = readProperties file: 'pipeline.properties'
echo "Immediate one ${properties.repo}"
}
}
pipeline {
agent none
stages {
stage ('prepare') {
agent any
steps {
script {
loadProperties()
}
}
}
stage('Build') {
agent { label '${properties.agent}' }
steps {
sh 'hostname'
echo properties.repo
}
}
}
}
--
You received this message because you are subscribed to the Google Groups
"Jenkins Users" group.
To unsubscribe from this group and stop receiving emails from it, send an
To view this discussion on the web visit
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<https://groups.google.com/d/msgid/jenkinsci-users/4cfff4fb-aa1f-4ad2-9017-d6dcf89a7b36%40googlegroups.com?utm_medium=email&utm_source=footer>
.
For more options, visit https://groups.google.com/d/optout.
--
Eric Pyle
Siemens PLM Software
Lebanon, NH
--

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For more options, visit https://groups.google.com/d/optout.
--
Eric Pyle
Siemens PLM Software
Lebanon, NH

[chris scott]

Hi did you guys every get to a resolution on this? I have exactly the same
issue.

Post by ishan jain
Hi Eric,
This the full code that copied earlier. You would only require to create a
properties file. The other echo statements that i have put are printing out
the values just fine.

OK, so the variable is now being evaluated, but it is not set. Possibly a
variable scoping issue? Can you post the exact code?
Hi Eric,
I tried putting the var in double quotes but still it is not able to
resolve it. I get *'*There are no nodes with the label ‘null’' error. I
am able to print the value of exact same variable but it seems it is not
resolving the variable name in here. Is there something else i need to do
here ?

Post by Eric Pyle
It should work if you use double quotes around your agent variable.
Variable resolution will not happen within single quotes.
I am using declarative syntax to build my pipeline. I am loading several
variables from a properties file in the beginning and i now i would like to
control the 'on which slave node something executes' via variables. But i
cannot figure out how to use variable as a agent label. The following is
properties = null
def loadProperties() {
node {
checkout scm
properties = readProperties file: 'pipeline.properties'
echo "Immediate one ${properties.repo}"
}
}
pipeline {
agent none
stages {
stage ('prepare') {
agent any
steps {
script {
loadProperties()
}
}
}
stage('Build') {
agent { label '${properties.agent}' }
steps {
sh 'hostname'
echo properties.repo
}
}
}
}
--
You received this message because you are subscribed to the Google
Groups "Jenkins Users" group.
To unsubscribe from this group and stop receiving emails from it, send
To view this discussion on the web visit
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<https://groups.google.com/d/msgid/jenkinsci-users/4cfff4fb-aa1f-4ad2-9017-d6dcf89a7b36%40googlegroups.com?utm_medium=email&utm_source=footer>
.
For more options, visit https://groups.google.com/d/optout.
--
Eric Pyle
Siemens PLM Software
Lebanon, NH
--

You received this message because you are subscribed to the Google Groups
"Jenkins Users" group.
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.
For more options, visit https://groups.google.com/d/optout.
--
Eric Pyle
Siemens PLM Software
Lebanon, NH

[gilad via Jenkins Users]

same here :-\

even created a StackOverflow issue for this:
https://stackoverflow.com/questions/46630168/in-a-declarative-jenkins-pipeline-can-i-set-the-agent-label-dynamically

Post by ishan jain
I am using declarative syntax to build my pipeline. I am loading several
variables from a properties file in the beginning and i now i would like to
control the 'on which slave node something executes' via variables. But i
cannot figure out how to use variable as a agent label. The following is
properties = null
def loadProperties() {
node {
checkout scm
properties = readProperties file: 'pipeline.properties'
echo "Immediate one ${properties.repo}"
}
}
pipeline {
agent none
stages {
stage ('prepare') {
agent any
steps {
script {
loadProperties()
}
}
}
stage('Build') {
agent { label '${properties.agent}' }
steps {
sh 'hostname'
echo properties.repo
}
}
}
}

[gilad via Jenkins Users]

same here :-\

even created a StackOverflow issue for this:
https://stackoverflow.com/questions/46630168/in-a-declarative-jenkins-pipeline-can-i-set-the-agent-label-dynamically

[Björn Rohlén]

Post by gilad via Jenkins Users
same here :-\
https://stackoverflow.com/questions/46630168/in-a-declarative-jenkins-pipeline-can-i-set-the-agent-label-dynamically

There is an perfectly good answer in this issue?

[gilad via Jenkins Users]

not as far as I know... still an open issue

[Robert Hales]

I posted a reply to this. It was a head twister, but I think I solved the
problem and learned some interesting things.

Post by gilad via Jenkins Users
same here :-\
https://stackoverflow.com/questions/46630168/in-a-declarative-jenkins-pipeline-can-i-set-the-agent-label-dynamically

[ishan jain]

Hi Robert,

How did you resolve it ? I could never get it working with anything.

Post by Robert Hales
I posted a reply to this. It was a head twister, but I think I solved the
problem and learned some interesting things.

Post by gilad via Jenkins Users
same here :-\
https://stackoverflow.com/questions/46630168/in-a-declarative-jenkins-pipeline-can-i-set-the-agent-label-dynamically

[dandeliondodgeball]

I think it is here:
https://stackoverflow.com/questions/46630168/in-a-declarative-jenkins-pipeline-can-i-set-the-agent-label-dynamically

[Cos Bug]

Hello All,

Slightly related issue - I'm trying to use a variable interpolation in
stage name but it doesn't work.



stage("Backup ${DATABASE}") {

steps {
sh '''
...
'''
}

}

but I get an exception:

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed: WorkflowScript: 25: Expected string literal @ line 25, column 15. stage("Backup ${DATABASE}") { 1 error at org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:310) at org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:1085) at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:603) at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:581) at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:558) at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:298) at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:268) at groovy.lang.GroovyShell.parseClass(GroovyShell.java:688) at groovy.lang.GroovyShell.parse(GroovyShell.java:700) at org.jenkinsci.plugins.workflow.cps.CpsGroovyShell.doParse(CpsGroovyShell.java:129) at org.jenkinsci.plugins.workflow.cps.CpsGroovyShell.reparse(CpsGroovyShell.java:123) at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.parseScript(CpsFlowExecution.java:517) at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.start(CpsFlowExecution.java:480) at org.jenkinsci.plugins.workflow.job.WorkflowRun.run(WorkflowRun.java:268) at hudson.model.ResourceController.execute(ResourceController.java:97) at hudson.model.Executor.run(Executor.java:429) Finished: FAILURE

Does anyone know how to make it work ?

[Victor Martinez]

it seems it's already an expected behaviour
https://issues.jenkins-ci.org/browse/JENKINS-43820 in the declarative
pipelines but ... it seems to work in the scripted pipelines though.

[ADG ADG]

For making things work you can use this


stage("Backup " + "${DATABASE}") {

steps {
sh '''
...
'''
}

}

Post by Cos Bug
Hello All,
Slightly related issue - I'm trying to use a variable interpolation in
stage name but it doesn't work.
stage("Backup ${DATABASE}") {
steps {
sh '''
...
'''
}
}
Does anyone know how to make it work ?