How to integrate with machine agents

Prerequisites

This guide assumes the jenkins-k8s charm to already be deployed on a k8s juju model tutorial.

To integrate machine (VM) agents, you’ll need to have a bootstrapped machine model. Learn about bootstrapping different clouds here.

Use juju bootstrap localhost localhost to bootstrap a lxd machine controller with the name localhost for tutorial purposes.

Use juju add-model tutorial to add a model named tutorial.

Deploy Jenkins agents (VM)

Deploy 3 units of jenkins agents on the lxd cloud.

# Deploy an edge version of the charm until stable version is released.
juju deploy jenkins-agent --channel=latest/edge -n3

Create an offer for cross model relation

To relate charms across different models, a Juju offer is required.

Create an offer of the jenkins-agent charm’s agent relation.

juju offer jenkins-agent:agent

The output should look similar to the contents below:

Application "jenkins-agent" endpoints [agent] available at "admin/tutorial.jenkins-agent"

Relate Jenkins agents through the offer

Switch back to the k8s model where jenkins-k8s charm is deployed. An example of the switch command looks like the following: juju switch microk8s-localhost:tutorial.

Relate the agents to the jenkins-k8s server charm through the offer. The syntax of the offer is as follows: <controller>:<user>/<model>.<charm>.

juju relate jenkins-k8s:agent localhost:admin/tutorial.jenkins-agent