Allow Jenkins to start agents on DigitalOcean droplets on demand and destroy them as they get unused.
Our friends at Digital Ocean have provided an awesome promo code if you are new to Digital Ocean. After signing up for DigitalOcean, use DOJENKINS100 to get $100 credit to use over your first 60 days. Offer only valid for new accounts.
As of 2021-03-05 - If your using Freestyle Jobs and using something older than 2.277.2 (LTS) or 2.285 (Weekly) you will likely have your build crash the first time it connects to a given droplet. Its been fixed in newer version.
Either automatically upon Jenkins post-initialization or through Jenkins script console, example:
import com.dubture.jenkins.digitalocean.DigitalOceanCloud
import com.dubture.jenkins.digitalocean.SlaveTemplate
import jenkins.model.Jenkins
// parameters
def agentTemplateParameters = [
idleTerminationInMinutes: '10',
imageId: 'ubuntu-17-10-x64',
initScript: '',
installMonitoring: false,
instanceCap: '2',
labellessJobsAllowed: false,
labelString: 'digitalocean.toronto.ubuntu.17.10',
name: 'digitalocean.toronto.ubuntu.17.10',
numExecutors: '1',
regionId: 'tor1',
sizeId: '512mb',
sshPort: 22,
tags: '',
userData: '',
username: 'root',
workspacePath: '/home/jenkins'
]
def cloudParameters = [
authToken: '01234567890123456789012345678901234567890123456789',
connectionRetryWait: '30',
instanceCap: '2',
name: 'mycompany',
sshKeyId: '01234567',
timeoutMinutes: '10',
usePrivateNetworking: false,
privateKey: '''-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----'''
]
// https://github.com/jenkinsci/digitalocean-plugin/blob/digitalocean-plugin-0.17/src/main/java/com/dubture/jenkins/digitalocean/SlaveTemplate.java
SlaveTemplate agentTemplate = new SlaveTemplate(
agentTemplateParameters.name,
agentTemplateParameters.imageId,
agentTemplateParameters.sizeId,
agentTemplateParameters.regionId,
agentTemplateParameters.username,
agentTemplateParameters.workspacePath,
agentTemplateParameters.sshPort,
agentTemplateParameters.idleTerminationInMinutes,
agentTemplateParameters.numExecutors,
agentTemplateParameters.labelString,
agentTemplateParameters.labellessJobsAllowed,
agentTemplateParameters.instanceCap,
agentTemplateParameters.installMonitoring,
agentTemplateParameters.tags,
agentTemplateParameters.userData,
agentTemplateParameters.initScript
)
// https://github.com/jenkinsci/digitalocean-plugin/blob/digitalocean-plugin-0.17/src/main/java/com/dubture/jenkins/digitalocean/DigitalOceanCloud.java
DigitalOceanCloud digitalOceanCloud = new DigitalOceanCloud(
cloudParameters.name,
cloudParameters.authToken,
cloudParameters.privateKey,
cloudParameters.sshKeyId,
cloudParameters.instanceCap,
cloudParameters.usePrivateNetworking,
cloudParameters.timeoutMinutes,
cloudParameters.connectionRetryWait,
[agentTemplate]
)
// get Jenkins instance
Jenkins jenkins = Jenkins.getInstance()
// add cloud configuration to Jenkins
jenkins.clouds.add(digitalOceanCloud)
// save current Jenkins state to disk
jenkins.save()
jenkins:
clouds:
- digitalOcean:
authToken: "01234567890123456789012345678901234567890123456789"
connectionRetryWait: 10
instanceCap: 5
name: "mycompany"
privateKey: |
----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
sshKeyId: 1234567
templates:
- idleTerminationInMinutes: 10
imageId: "docker-20-04"
installMonitoring: false
instanceCap: 2
labellessJobsAllowed: false
name: "docker-20-04"
numExecutors: 1
regionId: "tor1"
setupPrivateNetworking: false
sizeId: "s-1vcpu-1gb"
sshPort: 22
username: "root"
workspacePath: "/jenkins/"
timeoutMinutes: 5
usePrivateNetworking: false