About Contour

Contour is an ingress controller for Kubernetes that works by deploying the Envoy proxy as a reverse proxy and load balancer. Contour supports dynamic configuration updates out of the box while maintaining a lightweight profile.

Contour supports multiple configuration APIs in order to meet the needs of as many users as possible:

• Ingress - A stable upstream API that enables basic ingress use cases.
• HTTPProxy - Contour's Custom Resource Definition (CRD) which expands upon the functionality of the Ingress API to allow for a richer user experience as well as solve shortcomings in the original design.
• Gateway API (beta) - A new CRD-based API managed by the Kubernetes SIG-Network community that aims to evolve Kubernetes service networking APIs in a vendor-neutral way.

How to integrate Contour with Argo Rollouts

NOTES:

1. The file as follows (and the codes in it) just for illustrative purposes only, please do not use directly!!!

2. The argo-rollouts >= v1.5.0-rc1

Steps:

1. Run the yaml/rbac.yaml to add the role for operate on the HTTPProxy.
2. Build this plugin.
3. Put the plugin somewhere & mount on to the argo-rolloutscontainer (please refer to the example YAML below to modify the deployment):

apiVersion: apps/v1
kind: Deployment
metadata:
  name: argo-rollouts
  namespace: argo-rollouts
spec:
  template:
    spec:
      ...
      volumes:
        ...
         - name: contour-plugin
           hostPath:
             path: /CHANGE-ME/rollouts-plugin-trafficrouter-contour
             type: ''
      containers:
        - name: argo-rollouts
        ...
          volumeMounts:
             - name: contour-plugin
               mountPath: /CHANGE-ME/rollouts-plugin-trafficrouter-contour

4. Create a ConfigMap to let argo-rollouts know the plugin's location:

apiVersion: v1
kind: ConfigMap
metadata:
  name: argo-rollouts-config
  namespace: argo-rollouts
data:
  trafficRouterPlugins: |-
    - name: "argoproj-labs/contour"
      location: "file://CHANGE-ME/rollouts-trafficrouter-contour-plugin/contour-plugin"
binaryData: {}

5. Create the CR/Rollout and put it into the operated services` namespace:

apiVersion: argoproj.io/v1alpha1
kind: Rollout
metadata:
  name: rollouts-demo
  namespace: rollouts-demo
spec:
  replicas: 2
  selector:
    matchLabels:
      app.kubernetes.io/instance: rollouts-demo
  strategy:
    canary:
      canaryService: canaryService
      stableService: stableService
      steps:
        - setWeight: 30
        - pause:
            duration: 10
      trafficRouting:
        plugins:
          argoproj-labs/contour:
            httpProxies:
              - rollouts-demo
            namespace: rollouts-demo
  workloadRef:
    apiVersion: apps/v1
    kind: Deployment
    name: canary

6. Enjoy It.

Contributing

Thanks for taking the time to join our community and start contributing!

• Please familiarize yourself with the Code of Conduct before contributing.
• Check out the open issues.