k8s-3.4 operator

# Create an app-operator project that defines the App CR.
$ mkdir -p $HOME/projects/example-inc/
# Create a new app-operator project
$ cd $HOME/projects/example-inc/
$ operator-sdk new app-operator --repo github.com/example-inc/app-operator
$ cd app-operator


# Add a new API for the custom resource AppService
$ operator-sdk add api --api-version=app.example.com/v1alpha1 --kind=AppService


# Add a new controller that watches for AppService
$ operator-sdk add controller --api-version=app.example.com/v1alpha1 --kind=AppService


# Set the username variable
$ export USERNAME=<username>


# Build and push the app-operator image to a public registry such as quay.io
$ operator-sdk build quay.io/$USERNAME/app-operator


# Login to public registry such as quay.io
$ docker login quay.io


# Push image
$ docker push quay.io/$USERNAME/app-operator


# Update the operator manifest to use the built image name (if you are performing these steps on OSX, see note below)
$ sed -i "s|REPLACE_IMAGE|quay.io/$USERNAME/app-operator|g" deploy/operator.yaml
# On OSX use:
$ sed -i "" "s|REPLACE_IMAGE|quay.io/$USERNAME/app-operator|g" deploy/operator.yaml


# Setup Service Account
$ kubectl create -f deploy/service_account.yaml
# Setup RBAC
$ kubectl create -f deploy/role.yaml
$ kubectl create -f deploy/role_binding.yaml
# Setup the CRD
$ kubectl create -f deploy/crds/app.example.com_appservices_crd.yaml
# Deploy the app-operator
$ kubectl create -f deploy/operator.yaml


# Create an AppService CR
# The default controller will watch for AppService objects and create a pod for each CR
$ kubectl create -f deploy/crds/app.example.com_v1alpha1_appservice_cr.yaml


# Verify that a pod is created
$ kubectl get pod -l app=example-appservice
NAME                     READY     STATUS    RESTARTS   AGE
example-appservice-pod   1/1       Running   0          1m


# Test the new Resource Type
$ kubectl describe appservice example-appservice
Name:         example-appservice
Namespace:    myproject
Labels:       <none>
Annotations:  <none>
API Version:  app.example.com/v1alpha1
Kind:         AppService
Metadata:
  Cluster Name:        
  Creation Timestamp:  2018-12-17T21:18:43Z
  Generation:          1
  Resource Version:    248412
  Self Link:           /apis/app.example.com/v1alpha1/namespaces/myproject/appservices/example-appservice
  UID:                 554f301f-0241-11e9-b551-080027c7d133
Spec:
  Size:  3


# Cleanup
$ kubectl delete -f deploy/crds/app.example.com_v1alpha1_appservice_cr.yaml
$ kubectl delete -f deploy/operator.yaml
$ kubectl delete -f deploy/role.yaml
$ kubectl delete -f deploy/role_binding.yaml
$ kubectl delete -f deploy/service_account.yaml
$ kubectl delete -f deploy/crds/app.example.com_appservices_crd.yaml