Hi
As in this SO question, http://stackoverflow.com/q/34186806/1506521, I am
trying to set environment variables on my Jenkins nodes (master + slaves)
automatically. i.e. via a script, without having to go through the web
front end.
The code given in the answer only works if the Node Properties Environment
Variables checkbox in the web interface has already been ticked.
import jenkins.model.*
import hudson.model.*
import hudson.slaves.*
jenkins = Jenkins.instance
node = jenkins.getNode('master')
props =
node.nodeProperties.getAll(hudson.slaves.EnvironmentVariablesNodeProperty.class)
for (prop in props) {
prop.envVars.put("MY_OTHER_NAME", "my_other_value")
}
jenkins.save()
I can't seem to find a way to enable the Node Properties Environment
Variables checkbox without doing so manually through the web interface.
I can create a new EnvironmentVariablesNodeProperty class and insert my env
vars into this, but then I cannot apply this to the jenkins instance:
import jenkins.model.Jenkins
import hudson.slaves.EnvironmentVariablesNodeProperty
import hudson.slaves.NodeProperty
def instance = Jenkins.instance
def evnp = new EnvironmentVariablesNodeProperty();
for (prop in evnp) {
prop.envVars.put("MY_OTHER_NAME", "my_other_value")
}
instance.nodeProperties = evnp
instance.save()
This results in the error message
groovy.lang.ReadOnlyPropertyException: Cannot set readonly property:
> nodeProperties for class: hudson.model.Hudson
In jenkins.model.Jenkins, nodeProperties is set to private, so I believe
that's why I can't overwrite it. However, I don't see any interface to
update it.
Is there some clever groovy metaprogramming trick that might allow me to
force-write a private field?
Alternatively, it seems possible to create a new DumbSlave via groovy with
this code
import jenkins.model.*
import hudson.model.*
import hudson.slaves.*
entry = new EnvironmentVariablesNodeProperty(new
EnvironmentVariablesNodeProperty.Entry("MY_NAME", "my_value"))
list = new LinkedList() list.add(entry)
Jenkins.instance.addNode(new DumbSlave("test-slave", "test slave
description", "C:\\Jenkins", "1", Node.Mode.NORMAL, "test-slave-label", new
JNLPLauncher(), new RetentionStrategy.Always(), list))
However, I don't see how this could be used to set an environment variable
on the existing master node. It doesn't seem possible to overwrite that
node with a new DumbSlave. Is there some way of specifying a list of
environment variables for the master node when first deploying Jenkins?
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