Jenkins EC2 Plugin Configuration via Groovy

ec2_cloud.groovy

/*
 * Configure the Jenkins EC2 Plugin via Groovy Script
 * EC2 Plugin URL: https://wiki.jenkins-ci.org/display/JENKINS/Amazon+EC2+Plugin
 */

import hudson.model.*
import jenkins.model.*
import hudson.plugins.ec2.*
import com.amazonaws.services.ec2.model.InstanceType
  
def instance = Jenkins.getInstance()

def ec2_cloud_name = 'gist-example-cloud'
def ec2_instance_cap = 5

def worker_description = 'jenkins-worker'
def worker_label_string = 'worker'

def ami_id = 'ami-AAAAAAAA'
def security_groups = 'sg-11111111,sg-22222222'
def subnet_id = 'subnet-SSSSSSSS'
def instance_type = 'm3.2xlarge'
def instance_profile_arn = 'arn:aws:iam::123456789012:instance-profile/JenkinsInstanceProfile'

def number_of_executors = 8

def ec2_tags = [
  new EC2Tag('Name', 'jenkins-worker')
]

def priv_key_txt = '''
-----BEGIN RSA PRIVATE KEY-----
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
-----END RSA PRIVATE KEY-----
'''

  

def worker_ami = new SlaveTemplate(
  // String ami
  ami_id,
  // String zone
  '',
  // SpotConfiguration spotConfig
  null,
  // String securityGroups
  security_groups,
  // String remoteFS
  '',
  // InstanceType type
  InstanceType.fromValue(instance_type),
  // boolean ebsOptimized
  false,
  // String labelString
  worker_label_string,
  // Node.Mode mode
  Node.Mode.NORMAL,
  // String description
  worker_description,
  // String initScript
  '',
  // String tmpDir
  '',
  // String userData
  '',
  // String numExecutors
  "${number_of_executors}",
  // String remoteAdmin
  '',
  // AMITypeData amiType
  new UnixData(null, null),
  // String jvmopts
  '',
  // boolean stopOnTerminate
  false,
  // String subnetId
  subnet_id,
  // List<EC2Tag> tags
  ec2_tags,
  // String idleTerminationMinutes
  '30',
  // boolean usePrivateDnsName
  true,
  // String instanceCapStr
  '50',
  // String iamInstanceProfile
  instance_profile_arn,
  // boolean useEphemeralDevices
  true,
  // boolean useDedicatedTenancy
  false,
  // String launchTimeoutStr
  '1800',
  // boolean associatePublicIp
  false,
  // String customDeviceMapping
  '',
  // boolean connectBySSHProcess
  false,
  // boolean connectUsingPublicIp
  false
)

def new_cloud = new AmazonEC2Cloud(
  // String cloudName
  ec2_cloud_name,
  // boolean useInstanceProfileForCredentials
  true,
  // String credentialsId
  '',
  // String region
  'us-east-1',
  // String privateKey
  priv_key_txt,
  // String instanceCapStr
  "${ec2_instance_cap}",
  // List<? extends SlaveTemplate> templates
  [worker_ami]
)

instance.clouds.add(new_cloud)

Very helpful, thanks.

It was great starting point.
In Version 1.44.1 both SlaveTemplate and AmazonEC2Cloud constructors have been changed.
The below works in Version 1.44.1
////////////////////////////////////////////////////////////////////////////////////////////
import hudson.model.*
import jenkins.model.*
import hudson.plugins.ec2.*
import com.amazonaws.services.ec2.model.InstanceType

def instance = Jenkins.getInstance()

def ec2_cloud_name = 'jenkins-slaves'
def ec2_instance_cap = 5

def worker_description = 'java-slave'
def worker_label_string = 'java'

def ami_id = 'ami-xxxxxx'
def security_groups = 'jenkins-sg'
def subnet_id = 'subnet-xxxxx1 subnet-xxxxx2 subnet-xxxxxx3'
def instance_type = 't2.medium'
def instance_profile_arn = 'arn:aws:iam::123123123:instance-profile/jenkins-role'

def number_of_executors = 4

def ec2_tags = [
new EC2Tag('Name', 'jenkins-java-worker')
]

def priv_key_txt = '''
-----BEGIN RSA PRIVATE KEY-----
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
-----END RSA PRIVATE KEY-----
'''

def worker_ami = new SlaveTemplate(
// String ami
ami_id,
// String zone
'',
// SpotConfiguration spotConfig
null,
// String securityGroups
security_groups,
// String remoteFS
'/home/ubuntu',
// InstanceType type
InstanceType.fromValue(instance_type),
// boolean ebsOptimized
false,
// String labelString
worker_label_string,
// Node.Mode mode
Node.Mode.NORMAL,
// String description
worker_description,
// String initScript
'',
// String tmpDir
'',
// String userData
'',
// String numExecutors
"${number_of_executors}",
// String remoteAdmin
'ubuntu',
// AMITypeData amiType
new UnixData('', '', '', '22'),
// String jvmopts
'',
// boolean stopOnTerminate
false,
// String subnetId
subnet_id,
// List tags
ec2_tags,
// String idleTerminationMinutes
'15',
// // boolean usePrivateDnsName
// true,
// String instanceCapStr
'50',
// String iamInstanceProfile
instance_profile_arn,
// boolean deleteRootOnTermination
true,
// boolean useEphemeralDevices
false,
// boolean useDedicatedTenancy
false,
// String launchTimeoutStr
'1800',
// boolean associatePublicIp
false,
// String customDeviceMapping
'',
// boolean connectBySSHProcess
false,
// boolean monitoring
false,
// boolean t2Unlimited
false,
// ConnectionStrategy connectionStrategy
hudson.plugins.ec2.ConnectionStrategy.PRIVATE_IP,
// int maxTotalUses
-1

)

def new_cloud = new AmazonEC2Cloud(
// String cloudName
ec2_cloud_name,
// boolean useInstanceProfileForCredentials
true,
// String credentialsId
'',
// String region
'eu-central-1',
// String privateKey
priv_key_txt,
// String instanceCapStr
"${ec2_instance_cap}",
// List<? extends SlaveTemplate> templates
[worker_ami ],
//String roleArn
'',
//String roleSessionName
''
)

instance.clouds.add(new_cloud)

Thank you,It worked. How to add host verification strategy here ?

Hi, this code only updates in-memory config. How to trigger save to disk and trigger Job Configuration History to commit the new config?
Edit: to save the new config to disk you need to call: instance.save()

Here is how I do it:

// get Jenkins instance
Jenkins jenkins = Jenkins.getInstance()

// add cloud configuration
jenkins.clouds.add(amazonEC2Cloud)

// save current Jenkins state to disk
jenkins.save()
echo "Added new Ec2 Cloud for worker nodes: ${thisCloudname} - ${thisDescription}"