Add Support for Kustomize based scripts to setup Operator (#141)

README.md

@@ -21,20 +21,21 @@ MinIO-Operator brings native MinIO, [MCS](https://github.com/minio/mcs), and [KE
 - Kubernetes version v1.17.0 and above for compatibility. MinIO Operator uses `k8s/client-go` v0.18.0.
 - `kubectl` configured to refer to a Kubernetes cluster.
 - Create the required PVs as [explained here](https://github.com/minio/minio-operator/blob/master/docs/creating-pv-manually.md).
+- Optional: `kustomize` installed as [explained here](https://github.com/kubernetes-sigs/kustomize/blob/master/docs/INSTALL.md#installation).
 
-### Create Operator and related resources
+### Create Operator Deployment
 
-To start MinIO-Operator, use the `minio-operator.yaml` file.
+To start MinIO-Operator with default configuration, use the `minio-operator.yaml` file.
 
 ```bash
 kubectl apply -f https://raw.githubusercontent.com/minio/minio-operator/master/minio-operator.yaml
 ```
 
-This will create all relevant resources required for the Operator to work.
-
-You could install the MinIO Operator a custom namespace by customizing the `minio-operator.yaml` file or using [kustomize](https://github.com/kubernetes-sigs/kustomize)
+Advanced users can leverage [kustomize](https://github.com/kubernetes-sigs/kustomize) to customize operator configuration
 
 ```bash
+git clone https://github.com/minio/minio-operator
+cd operator-deployment
 kustomize build | kubectl apply -f -
 ```
 
@@ -50,7 +51,7 @@ kubectl apply -f https://raw.githubusercontent.com/minio/minio-operator/master/e
 
 Add an [external service](https://kubernetes.io/docs/concepts/services-networking/service/) in MinIOInstance definition to enable Service based access to the MinIOInstance pods. Refer [the example here](https://github.com/minio/minio-operator/blob/master/examples/minioinstance.yaml?raw=true) for details on how to setup service based access for MinIOInstance pods.
 
-### Expose MinIO via Istio
+### Advanced: Expose MinIO via Istio
 
 Istio >= 1.4 has support for headless Services, so instead of creating an explicit `Service` for the created MinIO instance, you can also directly target the headless Service that is created by the operator.
 

operator-deployment/crd.yaml

@@ -0,0 +1,91 @@
+apiVersion: apiextensions.k8s.io/v1
+kind: CustomResourceDefinition
+metadata:
+  name: minioinstances.operator.min.io
+spec:
+  group: operator.min.io
+  scope: Namespaced
+  names:
+    kind: MinIOInstance
+    singular: minioinstance
+    plural: minioinstances
+  versions:
+    - name: v1
+      served: true
+      storage: true
+      schema:
+      # openAPIV3Schema is the schema for validating custom objects.
+      # Refer https://kubernetes.io/docs/tasks/access-kubernetes-api/custom-resources/custom-resource-definitions/#specifying-a-structural-schema
+      # for more details
+        openAPIV3Schema:
+          type: object
+          properties:
+            spec:
+              type: object
+              x-kubernetes-preserve-unknown-fields: true
+              properties:
+                replicas:
+                  type: integer
+                  minimum: 1
+                  maximum: 32
+                image:
+                  type: string
+                serviceName:
+                  type: string
+                volumesPerServer:
+                  type: integer
+                mountPath:
+                  type: string
+                podManagementPolicy:
+                  type: string
+                  enum: [Parallel,OrderedReady]
+                  default: Parallel
+                requestAutoCert:
+                  type: boolean
+                  default: false
+                version:
+                  type: string
+                mountpath:
+                  type: string
+                subpath:
+                  type: string
+                mcs:
+                  type: object
+                  x-kubernetes-preserve-unknown-fields: true
+                  properties:
+                    image:
+                      type: string
+                    replicas:
+                      type: integer
+                      default: 2
+                    mcsSecret:
+                      type: object
+                      properties:
+                        name:
+                          type: string
+                kes:
+                  type: object
+                  x-kubernetes-preserve-unknown-fields: true
+                  properties:
+                    image:
+                      type: string
+                    replicas:
+                      type: integer
+                      default: 2
+                    kesSecret:
+                      type: object
+                      properties:
+                        name:
+                          type: string
+            status:
+              type: object
+              properties:
+                currentState:
+                  type: string
+      subresources:
+        # status enables the status subresource.
+        status: {}
+      additionalPrinterColumns:
+        - name: Current State
+          type: string
+          jsonPath: ".status.currentState"

operator-deployment/deployment.yaml

@@ -0,0 +1,25 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: minio-operator
+  namespace: default
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      name: minio-operator
+  template:
+    metadata:
+      labels:
+        name: minio-operator
+    spec:
+      serviceAccountName: minio-operator
+      containers:
+        - name: minio-operator
+          image: minio/k8s-operator:2.0.5
+          imagePullPolicy: IfNotPresent
+          env:
+            - name: CLUSTER_DOMAIN
+              value: $(CLUSTER_DOMAIN)
+            - name: WATCHED_NAMESPACE
+              value: $(WATCHED_NAMESPACE)

operator-deployment/kustomization.yaml

@@ -0,0 +1,63 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+namespace: minio-operator
+
+# Configure number of MinIO Operator Deployment Replicas
+replicas:
+  - name: minio-operator
+    count: 1
+
+# Configure repo and tag of MinIO Operator Image
+images:
+  - name: minio/k8s-operator
+    newName: minio/k8s-operator
+    newTag: 2.0.5
+
+# Configure the Cluster Domain and NameSpace to Watch
+configMapGenerator:
+  - name: operator-env
+    literals:
+    - CLUSTER_DOMAIN="cluster.local"
+    - WATCHED_NAMESPACE="default"
+
+# Configure the Namespace and ServiceAccount name
+patchesJson6902:
+  - target:
+      version: v1
+      kind: ServiceAccount
+      name: minio-operator
+    patch: |-
+      - op: replace
+        path: /metadata/name
+        value: "minio-operator"
+  - target:
+      version: v1
+      kind: Namespace
+      name: minio-operator
+    patch: |-
+      - op: replace
+        path: /metadata/name
+        value: "minio-operator"
+
+vars:
+  - name: CLUSTER_DOMAIN
+    objref:
+      kind: ConfigMap
+      name: operator-env
+      apiVersion: v1
+    fieldref:
+      fieldpath: data.CLUSTER_DOMAIN
+  - name: WATCHED_NAMESPACE
+    objref:
+      kind: ConfigMap
+      name: operator-env
+      apiVersion: v1
+    fieldref:
+      fieldpath: data.WATCHED_NAMESPACE
+
+resources:
+  - namespace.yaml
+  - service-account.yaml
+  - crd.yaml
+  - rbac.yaml
+  - deployment.yaml

operator-deployment/namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: minio-operator

operator-deployment/rbac.yaml

@@ -0,0 +1,80 @@
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRole
+metadata:
+  name: minio-operator-role
+rules:
+- apiGroups:
+  - ""
+  resources:
+  - namespaces
+  - secrets
+  - pods
+  - services
+  - events
+  verbs:
+  - get
+  - watch
+  - create
+  - list
+  - delete
+- apiGroups:
+  - apps
+  resources:
+  - statefulsets
+  - deployments
+  verbs:
+  - get
+  - create
+  - list
+  - patch
+  - watch
+  - update
+  - delete
+- apiGroups:
+  - batch
+  resources:
+  - jobs
+  verbs:
+  - get
+  - create
+  - list
+  - patch
+  - watch
+  - update
+  - delete
+- apiGroups:
+  - "certificates.k8s.io"
+  resources:
+  - "certificatesigningrequests"
+  - "certificatesigningrequests/approval"
+  - "certificatesigningrequests/status"
+  verbs:
+  - update
+  - create
+  - get
+  - delete
+- apiGroups:
+  - operator.min.io
+  resources:
+  - "*"
+  verbs:
+  - "*"
+- apiGroups:
+  - min.io
+  resources:
+  - "*"
+  verbs:
+  - "*"
+---
+kind: ClusterRoleBinding
+apiVersion: rbac.authorization.k8s.io/v1beta1
+metadata:
+  name: minio-operator-binding
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: minio-operator-role
+subjects:
+- kind: ServiceAccount
+  name: minio-operator
+  namespace: default

operator-deployment/service-account.yaml

@@ -0,0 +1,5 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: minio-operator
+  namespace: default