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Ansible Kubernetes Operator

How to run on Mac

Install with brew

brew install operator-sdk

Confirm version

operator-sdk version

operator-sdk version: "v1.0.0", commit: "d7d5e0cd6cf5468bb66e0849f08fda5bf557f4fa", kubernetes version: "v1.18.2", go version: "go1.14.7 darwin/amd64", GOOS: "darwin", GOARCH: "amd64"

Create and Initialize the Project

mkdir ~/memcached-operator  && cd ~/memcached-operator/
operator-sdk init --plugins=ansible --domain example.com

Create the API

$ operator-sdk create api --group cache --version v1alpha1 --kind Memcached --generate-role

Modify the Manager

Update the file roles/memcached/tasks/main.yml:

---
# tasks file for Memcached
- name: start memcached
  community.kubernetes.k8s:
    definition:
      kind: Deployment
      apiVersion: apps/v1
      metadata:
        name: '{{ ansible_operator_meta.name }}-memcached'
        namespace: '{{ ansible_operator_meta.namespace }}'
      spec:
        replicas: "{{ size }}"
        selector:
          matchLabels:
            app: memcached
        template:
          metadata:
            labels:
              app: memcached
          spec:
            containers:
            - name: memcached
              command:
              - memcached
              - -m=64
              - -o
              - modern
              - -v
              image: "docker.io/memcached:1.4.36-alpine"
              ports:
                - containerPort: 11211

Add the defaults to roles/memcached/defaults/main.yml

---
# defaults file for Memcached
size: 1

And update the file config/samples/cache_v1alpha1_memcached.yaml

---
apiVersion: cache.example.com/v1alpha1
kind: Memcached
metadata:
  name: memcached-sample
spec:
  size: 3

Define your image and container registry:

export IMG=docker.io/imjoseangel/memcached-operator:v1

And run:

make docker-build docker-push IMG=$IMG

Note: Be sure that there are no extra spaces in your PATH environment or the command will fail.

Run the Operator

Apply the Memcached Kind (CRD)

make