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jenkins-helper

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API Functions (NodeHelper.groovy)

The NodeHelper API contains helper functions to query basic machine stats in real time, add new machines, update/overwrite labels.

  • Get CPU count String getCpuCount(String computerName)
  • Get Installed memory Tuple getMemory(String computerName)
  • Get OS information Tuple getOsInfo(String computerName)
  • Get Kernel information Tuple getOsKernelInfo(String computerName)
  • Get Endian String getEndian(String computerName)
  • Get Location String getLocation(String computerName)
  • Get Description String getDescription(String computerName)
  • Get Home directory String getHomeDirectoryPath(String computerName)
  • Get free space in the home directory String getSpaceLeftInGb(String computerName)
  • Get Total installed disk space String getTotalSpace(String computerName)
  • Get Labels String getLabels(String computerName)
  • Add new Node String addNewNode(String newNodeName,String newNodeDescription,String newNodeRemoteFS,int newNodeNumExecutors,Mode newNodeMode,String newNodeLabelString,def launcher)
  • Add Label String addLabel(String computerName, String label)
  • Append Label String appendlabel(String computerName, String label)
  • Node Exists static boolean nodeIsOnline(String nodeLabel)

Space Monitoring (WorkspaceInfo.groovy)

Iterates over online nodes on Jenkins and prints the contents of the workspace directory along with the space they occupy

  • The computers it iterates over can be limited by input parameter, projectLabel
  • As of now, it only works for linux, aix, and mac

Create New Node (CreateNewNode.groovy)

Used to create new nodes with any basic labels

  • This job expects 3 parameters
    • String machineNames
      • Comma seperated host names of the machine(s)
    • String machineIPs
      • Comma seperated IP address of the machine(s)
    • String labelStrings
      • Labels you would like to be added to the machine.
      • Each label must be separated by spaces and labels for different machines must be separated by ,
      • If identical labels need to be applied to all the machines, only one set of labels need to be supplied

Update Machine Identifiers (UpdateMachineIdentifiers.groovy)

Used to update machine labels and description

  • The computers it iterates over can be limited by input parameter, projectLabel
  • The job expects 5 input parameters
    • boolean overWriteLabels
      • Does excatly as the name suggests, completely wipes previous labels
      • If set true, you do not need to pass a projectLabel
    • String labels
      • Labels you would like to be added to the machine.
      • Each label must be separated by spaces and labels for different machines must be separated by ,
      • If identical labels need to be applied to all the machines, only one set of labels need to be supplied
      • Use Cases:
        • Multiple machines, unique labels: machine1Label1 machine1Label2, machine2Label1 machine2Label2
        • Single or multiple machines, identical labels: Label1 Label2
    • String machineNames
      • Can either enter a list of names or a single name. For list seperate them with ","
    • boolean updateDescription
      • If this is set true, the job will update description
      • This has higher precedence than overWriteLabels
    • String projectlabel
      • This limits which machines will be touched
  • Use Cases:
    • Update labels:
      • Objective: add default labels(os, arch, and kernel)
      • Procedure: overWriteLabels is not set and only the machine name(s) is supplied
    • Overwrite Labels:
      • Objective: overwrite previous labels with new ones
      • Procedure: overWriteLabels is set and machine name(s) + labels are supplied
    • Append labels:
      • Objective: want to add a custom label.
      • Procedure: supply labels and machine names
    • Update description:
      • It adds CPU count, Disk space and installed RAM to the description
      • Procedure: have updateDescription parameter checked

How-to

Setup

Here are the instructions on how to add the library to Jenkins

Usuage

To use the API in a Jenkins job you'll need to add @Library('NodeHelper') _ to import the API.

TODOs

  • A job that pulls machine list from a inventory file and validates the names with those already on Jenkins. It also adds any labels mentioned in the inventory file to the machine on Jenkins, issue
  • CPU Information for a ZOS, issue
  • Logic to get Hypervisor information, issue
  • Move strings out to a config file, issue

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Jenkins Node helper API and helper jobs

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