Digital Ocean Jenkins Library

Jenkins pipeline library for using Digital Ocean.

It provides some tasks to interact with Digital Ocean services like Kubernetes clusters, load balancers, etc.

It's a very early version. While provided steps do work, only very few features are covered.

Table of contents

• Examples
• Steps
• Authentication
• Prerequisites
• Installation
• Contributing

Examples

Creating a cluster for running some tests

Given a deployment.yaml in the workspace, one can:

1. create a K8S cluster in Digital Ocean
2. apply the deployment in this cluster
3. wait for the service(s) to be available
4. run some tests
5. tear down the deployment
6. remove the K8S cluster

This is achieved by running the following code in your Jenkinsfile:

withDigitalOceanK8SCluster(
        logging: true,
        credentials: "MY_DO_CREDENTIALS",
        name: "jenkins-${env.BUILD_NUMBER}",
        region: "ams3",
        version: "1.13.1-do.2",
        pools: [[
          name : "jenkins-${env.BUILD_NUMBER}"
          count: 2,
          size : "s-1vcpu-2gb"
        ]]
) { cluster ->
    withDeployment(file: "deployment.yaml") {
        waitForDigitalOceanLoadBalancer(
                service: "my-service",
                outputVariable: "MY_SERVICE_IP",
                logging: true,
        )
        echo "Service IP = ${env.MY_SERVICE_IP}"
        // Runs the tests against load balancer at MY_SERVICE_IP
    }
    // Here, the deployment has been deleted
}
// Here, the cluster has been destroyed

Steps

Digital Ocean specific tasks

• withDigitalOceanK8SCluster - creates a Digital Ocean Kubernetes cluster and allows some code to run against it.
• waitForDigitalOceanLoadBalancer - waits for a Digital Ocean load balancer created by a service to be ready.

K8S steps

• withDeployment - deploying (and undeploying) a K8S file

Authentication

In tasks where the Digital Ocean API is accessed, a Personal Access Token must be provided and stored as a Jenkins credentials entry accessible by your pipeline or job. The type of the credentials must be "Secret Text" and the ID of the credentials entry will be used as the credentials parameter of the step.

Prerequisites

This library depends on the http_request plugin to be installed.

The K8S steps require kubectl to be available. It can be made available in the build environment though a Docker image (preferred) or installed in the agent directly.

Installation

Before being used by your pipeline definitions, this library must be registered in your Jenkins installation.

Using the Jenkins management interface, you can declare this library the following way:

Refer to the Jenkins documentation to know how to perform this registration.

You can also use Jenkins Configuration as Code:

unclassified:
  globallibraries:
    libraries:
      - name: "digital-ocean-jenkins-library"
        retriever:
          modernSCM:
            scm:
              github:
                repoOwner: "nemerosa"
                repository: "digital-ocean-jenkins-library"

When the library is registered, you can use it in your Jenkinsfiles:

@Library("digital-ocean-jenkins-library@master") _

Contributing

Contributions for this library are very welcome: ideas, new steps, fixes, features, issues, pull requests.