I recently had a problem where I need to automatically take nodes online and
offline. My solution was to install the Scriptler plugin and write a couple of
Groovy scripts that talk directly to the server data structures. The code
below will take any "temporarily offline" hosts for label "labelName" (passed
in as a script parameter) and make them online.
Besides the Scriptler plugin, you will need to know a little bit about Groovy
(most valid Java is valid Groovy), and you'll need to understand the Jenkins,
Node and Computer classes. Download the sources so you can see how to work
those classes. One caveat: these scripts need to specifically be run on the
master node-if run on a slave, it can't reach the Jenkins data objects.
And now for the script:
import hudson.model.Hudson
import jenkins.model.Jenkins
import hudson.model.Computer
println "Passed in label $labelName."
label = Jenkins.instance.getLabel(labelName)
if(!label){
println("Could not find label $labelName")
}else{
nodes = label.getNodes()
for(node in nodes){
nodeName = node.getNodeName()
println("Node $nodeName is part of label $labelName")
}
}
nodeToComputer = new HashMap<Node, Computer>()
for(node in nodes){
computer = node.toComputer()
if(null == computer){
println("NO COMPUTER for node $nodeName")
}else{
nodeToComputer.put(node, computer)
}
}
for(node in nodes){
nodeName = node.getNodeName()
computer = nodeToComputer.get(node)
println("We have a computer for node $nodeName")
if(computer.isTemporarilyOffline()){
computer.setTemporarilyOffline(false)
println("Setting Node $nodeName to online");
}else{
println("Node $nodeName is already online.")
}
}
for(node in nodes){
nodeName = node.getNodeName()
computer = nodeToComputer.get(node)
print("Waiting for node $nodeName to finish...")
computer.waitUntilOnline()
println("done");
}
From: [email protected]
[mailto:[email protected]] On Behalf Of Stanley, Jason
Sent: Thursday, June 14, 2012 9:35 AM
To: [email protected]
Subject: How to update node description via a script?
Hello
I have automated a build process to update a database on my build nodes.
The one last step I am trying to do is update the node description in Jenkins.
There is no CLI operation to change the description of the Node.
Does anyone have a simple script or idea of how I can update the description in
Jenkins outside of editing the config.xml file and running the "Reload
Configuration from Disk" operation.
The reason for not using the "Reload Configuration from Disk" operation is I
found if any existing jobs are running, they are stopped.
Thanks
Jason
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