Principio

When a namespace is created, it will search the cluster for InitConfig kinds within the cluster.

It will apply the items in spec.initItems to the namespace if the labels in spec.initLabels match or not.

Install

Set your kube context to the cluster you want to install on, then run the following

make install
make IMG=amazeeio/principio:v0.0.1 deploy

This will create principio-system namespace in the cluster and set up the controller.

Notes

Initially it will reconcile all namespaces, but with no config it will not act on them. Once config is added, it will only apply to newly created namespaces. If the controller re-starts, it will reconcile all namespaces again, but this time it will act on them if it needs to.

Spec

kind: InitConfig
apiVersion: init.amazee.io/v1alpha1
metadata:
  name: my-custom-service
  namespace: principio-system
spec:
  initLabels:
    matchExpressions:
      - key: principio.amazee.io/no-custom-service
        operator: DoesNotExist
  initItems:
    - apiVersion: v1
      kind: Service
      metadata:
        name: custom-service
      spec:
        clusterIP: None
        ports:
          - port: 1
            protocol: TCP
            targetPort: 1
        type: ClusterIP
    - apiVersion: v1
      kind: Endpoints
      metadata:
        name: custom-service
      subsets:
        - addresses:
            - ip: 10.1.2.3
            - ip: 10.1.2.4
            - ip: 10.1.2.5
          ports:
            - port: 1
              protocol: TCP

Notes

This will only work if a namespace is created with the labels as this controller only watches for the initial creation of a namespace.

Based on the example Spec above, the following namespace WILL NOT get the custom-service

apiVersion: v1
kind: Namespace
metadata:
  name: my-custom-namespace
  labels:
    principio.amazee.io/no-custom-service: 'true'

Based on the example Spec above, the following namespace WILL get the custom-service

apiVersion: v1
kind: Namespace
metadata:
  name: my-other-custom-namespace