Developing MinIO Operator - cesnietor/dev-docs GitHub Wiki

Developing for MinIO Operator requires to have a Kubernetes environment due to the nature of the product.

We'll use Kind to create our Kubernetes-like environment. And we also need a Docker environment (Docker Desktop [requires subscription], Rancher Desktop or Podman) please see related Wikis.

Create kind config file with four nodes

echo "kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
nodes:
  - role: control-plane
  - role: worker
  - role: worker
  - role: worker
  - role: worker
" > kind-config.yaml

Create cluster like

kind create cluster --config kind-config.yaml

Apply kustomization file to your Kubernetes environment

kubectl kustomize . | kubectl apply -f -

This should create the namespaces and services defined in the yaml file.

If you want to use a define minio/operator image, see below for more info.

Update kustomization file if needed using yq

Use cases:

Changing number of minio/operator replicas to one:

yq -i -e '(. | select(.spec.selector.matchLabels.name=="minio-operator") | .spec.replicas) = 1' operator.yaml

If building a custom image -> Update console and operator to use your new image: Run:

make build TAG="minio/operator:cesnietor"

Uplooad your image to Kind (changes depending on Docker env), see docs for Podman:

make build TAG="minio/operator:cesnietor"

Upload image to kind:

kind load docker-image minio/operator:<YOUR_TAG>

Update operator.yaml to use your new image:

yq -i -e '(. | select(.spec.selector.matchLabels.app=="console") .spec.template.spec.containers[0].image) = "minio/operator:<YOUR_TAG>"' operator.yaml

yq -i -e '(. | select(.spec.selector.matchLabels.name=="minio-operator") .spec.template.spec.containers[0].image) = "minio/operator:<YOUR_TAG>"' operator.yaml

Verify your changes

diff <(yq <(kubectl kustomize .)) operator.yaml

Apply your changes with custom/edited yaml file.

kubectl apply -f operator.yaml

JWT required to login to Console is stored as a secret:

kubectl describe secrets -n minio-operator console-sa-secret

Copy to clipboard:

kubectl describe secrets -n minio-operator console-sa-secret | grep 'token:' | awk '{print $2}' | pbcopy

Using released image

kustomize build github.com/minio/operator/resources/\?ref\=v5.0.3 > operator.yaml