feat: add apiserver overload gvk

Signed-off-by: r3drun3 <simone.ragonesi@sighup.io>

PROJECT

@@ -71,4 +71,13 @@ resources:
   kind: ConfigMapDestroyer
   path: stackzoo.io/khaos/api/v1alpha1
   version: v1alpha1
+- api:
+    crdVersion: v1
+    namespaced: true
+  controller: true
+  domain: stackzoo.io
+  group: khaos
+  kind: ApiServerOverload
+  path: stackzoo.io/khaos/api/v1alpha1
+  version: v1alpha1
 version: "3"

README.md

@@ -13,16 +13,21 @@ Through the implementation of custom controllers and resources, Khaos facilitate
 Khaos is an **unopinionated** operator, in the sense that it provides simple and *atomic primitives* that engineers can use as building blocks in order to compose their preferred chaos strategy.  
 Currently, Khaos does not implement *cronjobs*; any scheduling of Khaos Custom Resources is delegated to external logic outside the cluster, possibly through a GitOps approach.  
 
+> [!WARNING]  
+> This operator will introduce fault and unpredicatbility in you rinfrastructure, use with caution  
+
 ## Supported features
 - [X] Delete pods
 - [x] Delete cluster nodes
 - [X] Delete secrets
 - [X] Delete configmaps
 - [X] Inject resource constraints in pods
 - [X] Add o remove labels in pods
+- [X] Flood api server with calls
 - [X] Exec commands inside pods (**experimental**).  
 
 
+
 ## Local Testing and Debugging
 First of all clone the repository:  
 ```console
@@ -80,13 +85,14 @@ Install and list the operator CRDs with the following command:
 make install && kubectl get crds
 
 NAME                                       CREATED AT
-commandinjections.khaos.stackzoo.io        2023-11-29T08:09:59Z
-configmapdestroyers.khaos.stackzoo.io      2023-11-29T08:09:59Z
-containerresourcechaos.khaos.stackzoo.io   2023-11-29T08:09:59Z
-nodedestroyers.khaos.stackzoo.io           2023-11-29T08:09:59Z
-poddestroyers.khaos.stackzoo.io            2023-11-29T08:09:59Z
-podlabelchaos.khaos.stackzoo.io            2023-11-29T08:09:59Z
-secretdestroyers.khaos.stackzoo.io         2023-11-29T08:09:59Z
+apiserveroverloads.khaos.stackzoo.io       2023-11-30T06:25:59Z
+commandinjections.khaos.stackzoo.io        2023-11-30T06:25:59Z
+configmapdestroyers.khaos.stackzoo.io      2023-11-30T06:25:59Z
+containerresourcechaos.khaos.stackzoo.io   2023-11-30T06:25:59Z
+nodedestroyers.khaos.stackzoo.io           2023-11-30T06:25:59Z
+poddestroyers.khaos.stackzoo.io            2023-11-30T06:25:59Z
+podlabelchaos.khaos.stackzoo.io            2023-11-30T06:25:59Z
+secretdestroyers.khaos.stackzoo.io         2023-11-30T06:25:59Z
 ```  
 
 In order to run the operator on your cluster (current context - i.e. whatever cluster `kubectl cluster-info` shows) run:  

api/v1alpha1/apiserveroverload_types.go

@@ -0,0 +1,59 @@
+/*
+Copyright 2023.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha1
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// EDIT THIS FILE!  THIS IS SCAFFOLDING FOR YOU TO OWN!
+// NOTE: json tags are required.  Any new fields you add must have json tags for the fields to be serialized.
+
+// ApiServerOverloadSpec defines the desired state of ApiServerOverload
+type ApiServerOverloadSpec struct {
+	//DurationSeconds int64 `json:"durationSeconds"`
+}
+
+// ApiServerOverloadStatus defines the observed state of ApiServerOverload
+type ApiServerOverloadStatus struct {
+	ExecutedTimestamp string `json:"executedTimestamp,omitempty"`
+}
+
+//+kubebuilder:object:root=true
+//+kubebuilder:subresource:status
+
+// ApiServerOverload is the Schema for the apiserveroverloads API
+type ApiServerOverload struct {
+	metav1.TypeMeta   `json:",inline"`
+	metav1.ObjectMeta `json:"metadata,omitempty"`
+
+	Spec   ApiServerOverloadSpec   `json:"spec,omitempty"`
+	Status ApiServerOverloadStatus `json:"status,omitempty"`
+}
+
+//+kubebuilder:object:root=true
+
+// ApiServerOverloadList contains a list of ApiServerOverload
+type ApiServerOverloadList struct {
+	metav1.TypeMeta `json:",inline"`
+	metav1.ListMeta `json:"metadata,omitempty"`
+	Items           []ApiServerOverload `json:"items"`
+}
+
+func init() {
+	SchemeBuilder.Register(&ApiServerOverload{}, &ApiServerOverloadList{})
+}

cmd/main.go

@@ -138,6 +138,13 @@ func main() {
 		setupLog.Error(err, "unable to create controller", "controller", "ConfigMapDestroyer")
 		os.Exit(1)
 	}
+	if err = (&controller.ApiServerOverloadReconciler{
+		Client: mgr.GetClient(),
+		Scheme: mgr.GetScheme(),
+	}).SetupWithManager(mgr); err != nil {
+		setupLog.Error(err, "unable to create controller", "controller", "ApiServerOverload")
+		os.Exit(1)
+	}
 	//+kubebuilder:scaffold:builder
 
 	if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {

config/crd/bases/khaos.stackzoo.io_apiserveroverloads.yaml

@@ -0,0 +1,47 @@
+---
+apiVersion: apiextensions.k8s.io/v1
+kind: CustomResourceDefinition
+metadata:
+  annotations:
+    controller-gen.kubebuilder.io/version: v0.13.0
+  name: apiserveroverloads.khaos.stackzoo.io
+spec:
+  group: khaos.stackzoo.io
+  names:
+    kind: ApiServerOverload
+    listKind: ApiServerOverloadList
+    plural: apiserveroverloads
+    singular: apiserveroverload
+  scope: Namespaced
+  versions:
+  - name: v1alpha1
+    schema:
+      openAPIV3Schema:
+        description: ApiServerOverload is the Schema for the apiserveroverloads API
+        properties:
+          apiVersion:
+            description: 'APIVersion defines the versioned schema of this representation
+              of an object. Servers should convert recognized schemas to the latest
+              internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources'
+            type: string
+          kind:
+            description: 'Kind is a string value representing the REST resource this
+              object represents. Servers may infer this from the endpoint the client
+              submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds'
+            type: string
+          metadata:
+            type: object
+          spec:
+            description: ApiServerOverloadSpec defines the desired state of ApiServerOverload
+            type: object
+          status:
+            description: ApiServerOverloadStatus defines the observed state of ApiServerOverload
+            properties:
+              executedTimestamp:
+                type: string
+            type: object
+        type: object
+    served: true
+    storage: true
+    subresources:
+      status: {}

config/crd/kustomization.yaml

@@ -9,6 +9,7 @@ resources:
 - bases/khaos.stackzoo.io_commandinjections.yaml
 - bases/khaos.stackzoo.io_podlabelchaos.yaml
 - bases/khaos.stackzoo.io_configmapdestroyers.yaml
+- bases/khaos.stackzoo.io_apiserveroverloads.yaml
 #+kubebuilder:scaffold:crdkustomizeresource
 
 patches:
@@ -21,6 +22,7 @@ patches:
 #- path: patches/webhook_in_commandinjections.yaml
 #- path: patches/webhook_in_podlabelchaos.yaml
 #- path: patches/webhook_in_configmapdestroyers.yaml
+#- path: patches/webhook_in_apiserveroverloads.yaml
 #+kubebuilder:scaffold:crdkustomizewebhookpatch
 
 # [CERTMANAGER] To enable cert-manager, uncomment all the sections with [CERTMANAGER] prefix.
@@ -32,6 +34,7 @@ patches:
 #- path: patches/cainjection_in_commandinjections.yaml
 #- path: patches/cainjection_in_podlabelchaos.yaml
 #- path: patches/cainjection_in_configmapdestroyers.yaml
+#- path: patches/cainjection_in_apiserveroverloads.yaml
 #+kubebuilder:scaffold:crdkustomizecainjectionpatch
 
 # [WEBHOOK] To enable webhook, uncomment the following section

config/rbac/apiserveroverload_editor_role.yaml

@@ -0,0 +1,31 @@
+# permissions for end users to edit apiserveroverloads.
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  labels:
+    app.kubernetes.io/name: clusterrole
+    app.kubernetes.io/instance: apiserveroverload-editor-role
+    app.kubernetes.io/component: rbac
+    app.kubernetes.io/created-by: khaos
+    app.kubernetes.io/part-of: khaos
+    app.kubernetes.io/managed-by: kustomize
+  name: apiserveroverload-editor-role
+rules:
+- apiGroups:
+  - khaos.stackzoo.io
+  resources:
+  - apiserveroverloads
+  verbs:
+  - create
+  - delete
+  - get
+  - list
+  - patch
+  - update
+  - watch
+- apiGroups:
+  - khaos.stackzoo.io
+  resources:
+  - apiserveroverloads/status
+  verbs:
+  - get

config/rbac/apiserveroverload_viewer_role.yaml

@@ -0,0 +1,27 @@
+# permissions for end users to view apiserveroverloads.
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  labels:
+    app.kubernetes.io/name: clusterrole
+    app.kubernetes.io/instance: apiserveroverload-viewer-role
+    app.kubernetes.io/component: rbac
+    app.kubernetes.io/created-by: khaos
+    app.kubernetes.io/part-of: khaos
+    app.kubernetes.io/managed-by: kustomize
+  name: apiserveroverload-viewer-role
+rules:
+- apiGroups:
+  - khaos.stackzoo.io
+  resources:
+  - apiserveroverloads
+  verbs:
+  - get
+  - list
+  - watch
+- apiGroups:
+  - khaos.stackzoo.io
+  resources:
+  - apiserveroverloads/status
+  verbs:
+  - get