Ansible Role: Hello World Kubernetes

Manages a Hello World application in Kubernetes|OpenShift. This project also includes the necessary bits for deploying this role with Ansible Operator in a Kubernetes|OpenShift cluster.

Requirements

• ansible >= 2.6
• openshift python package

Role Variables

See defaults/main.yml.

Dependencies

None

Example Playbook

NOTE The example below assumes that you have a running Kubernetes|OpenShift cluster and that you have sufficient permissions in the my-hello-world-namespace namespace.

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

Example Operator

NOTE The example below assumes that you are essentially a cluster admin for the Kubernetes|OpenShift cluster. This is because you'll be creating a Role, Service Accounts Role Binding, and a Custom Resource Definition.

First, we build our operator using operator-sdk, link here:

$ operator-sdk build hello-world-operator

Then, we create the important objects our operator needs to run:

$ 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, we start the operator:

# Use the image name from the operator-sdk build step above
# 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