Ansible Role: Hello World Kubernetes

This role manages a simple "Hello World" application in Kubernetes or OpenShift. It also allows you to deploy it using Ansible Operator in your Kubernetes or OpenShift cluster.

Requirements

• Ansible version 2.6 or higher
• OpenShift Python package

Role Variables

Check out the variable settings in defaults/main.yml.

Dependencies

There are no dependencies.

Example Playbook

NOTE This example assumes you have a running Kubernetes or OpenShift cluster and the right permissions in the my-hello-world-namespace.

- hosts: localhost
  vars:
    name: my-hello-world
    namespace: my-hello-world-namespace
    size: 3
  roles:
    - djzager.hello_world_k8s

Example Operator

NOTE This example assumes you have admin access to the Kubernetes or OpenShift cluster because you will create a Role, Service Accounts Role Binding, and a Custom Resource Definition.

First, build your operator using operator-sdk. You can find it here:

$ operator-sdk build hello-world-operator

Next, create the necessary objects for your operator:

$ kubectl create -f deploy/service_account.yaml \
                 -f deploy/role.yaml \
                 -f deploy/role_binding.yaml \
                 -f deploy/crds/examples_v1alpha1_helloworld_crd.yaml

Then, start the operator:

# Replace with the image name from the operator-sdk build step
# and set the imagePullPolicy to Never
$ sed 's|REPLACE_IMAGE|hello-world-operator|g; s|Always|Never|' deploy/operator.yaml | kubectl create -f -

Finally, create a HelloWorld resource:

$ kubectl create -f deploy/crds/examples_v1alpha1_helloworld_cr.yaml