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Writing your first CI pipeline, Part 3

This tutorial begins where Tutorial 2 left off. We’ll walk through the process for configuring your newly created Github repository with Brigade for testing new features. We'll configure a new Brigade project, and have Github push events to trigger Brigade builds.

Create a Brigade project

The Brigade server tracks separate configuration for each project you set up. And to create and manage these configurations, we use a simple YAML file and a Helm chart.

First, let's create a new project and point it to the GitHub project we just created, uuid-generator

We'll create the simplest config file possible. Substituting bacongobbler for your own Github username, open the file uuid-generator.yaml and write in the following:

project: "bacongobbler/uuid-generator"
repository: "github.com/bacongobbler/uuid-generator"
cloneURL: "https://github.com/bacongobbler/uuid-generator.git"
# Used by GitHub to compute hooks.
# MAKE SURE YOU CHANGE THIS. It's basically a password.
sharedSecret: "MySuperSecret"
# Use this to have Brigade update your project about the build.
# You probably want this if you want pull requests or commits to show
# the build status.
github:
  token: "github oauth token"

Make sure to not commit this to source control. It contains private data that should not be publicized in a git repository.

To use a Github OAuth token so your Pull Request statuses are updated...

  1. Go to https://github.com/settings/tokens/new and enter your password if prompted
  2. Give the token a description, such as brigade project: uuid-generator
  3. Grant the token full repo scope so Brigade can update Pull Request statuses

  1. Click Generate token
  2. Copy the personal access token in the next screen and add it to uuid-generator.yaml

Install the project chart

Now that we have written the project chart, let's install this project into Brigade. Recall that in the Quick install guide we used helm to install Brigade. We also use it to install projects.

$ helm install brigade/brigade-project --name uuid-generator -f uuid-generator.yaml

Note that -n uuid-generator provides a name for the project, which you will be able to see with helm ls. And -f uuid-generator.yaml loads the YAML file you wrote above.

Your project configuration can now be managed by Helm. Use helm upgrade to change the configuration. And helm delete will remove the project. See man helm-upgrade for more options and information regarding these commands.

Configuring Github

We want to build our project each time a new commit is pushed to master, and each time we get a new Pull Request.

To do this, log into your project (substituting bacongobbler for your own Github username) on https://github.com/bacongobbler/uuid-generator/settings/hooks.

From your project...

  1. On the Webhooks screen, click Add Webhook
  2. Complete the form:
  • Payload URL should be the URL to your BRIGADE server, adding the github webhook endpoint (e.g. https://brigade.example.com/events/github)
  • Content-Type should be application/json
  • Secret should be your secret in the YAML file (MySuperSecret)
  • In the radio buttons, choose Let me select individual events
    • Select push and pull request
  • Make sure the Active checkbox is selected
  • Click the Add Webhook button

To get the IP for your "Payload URL", run this command on your Kubernetes cluster, and look for the brigade-gw line:

$ kubectl get service
NAME                  TYPE           CLUSTER-IP   EXTERNAL-IP   PORT(S)          AGE
brigade-brigade-api   ClusterIP      10.0.0.57    <none>        7745/TCP         8h
brigade-brigade-gw    LoadBalancer   10.0.0.157   10.21.77.9    7744:31946/TCP   8h

You will use the EXTERNAL-IP address (feel free to map it to a DNS name if you wish): http://10.21.77.9:7744/events/github

The next time you push to the repository, the webhook system should trigger a build.

For more on configuring GitHub, see the GitHub Guide

After configuring Brigade to test new features, read part 4 of this tutorial to write a new feature to the uuid-generator project, which will trigger a test build using Brigade.