Add Nginx Gateway HPA(#3447)

Author: nowjean

charts/nginx-gateway-fabric/README.md

@@ -288,7 +288,7 @@ The following table lists the configurable parameters of the NGINX Gateway Fabri
 | `nginx.usage.resolver` | The nameserver used to resolve the NGINX Plus usage reporting endpoint. Used with NGINX Instance Manager. | string | `""` |
 | `nginx.usage.secretName` | The name of the Secret containing the JWT for NGINX Plus usage reporting. Must exist in the same namespace that the NGINX Gateway Fabric control plane is running in (default namespace: nginx-gateway). | string | `"nplus-license"` |
 | `nginx.usage.skipVerify` | Disable client verification of the NGINX Plus usage reporting server certificate. | bool | `false` |
-| `nginxGateway` | The nginxGateway section contains configuration for the NGINX Gateway Fabric control plane deployment. | object | `{"affinity":{},"config":{"logging":{"level":"info"}},"configAnnotations":{},"extraVolumeMounts":[],"extraVolumes":[],"gatewayClassAnnotations":{},"gatewayClassName":"nginx","gatewayControllerName":"gateway.nginx.org/nginx-gateway-controller","gwAPIExperimentalFeatures":{"enable":false},"image":{"pullPolicy":"Always","repository":"ghcr.io/nginx/nginx-gateway-fabric","tag":"edge"},"kind":"deployment","labels":{},"leaderElection":{"enable":true,"lockName":""},"lifecycle":{},"metrics":{"enable":true,"port":9113,"secure":false},"nodeSelector":{},"podAnnotations":{},"productTelemetry":{"enable":true},"readinessProbe":{"enable":true,"initialDelaySeconds":3,"port":8081},"replicas":1,"resources":{},"service":{"annotations":{},"labels":{}},"serviceAccount":{"annotations":{},"imagePullSecret":"","imagePullSecrets":[],"name":""},"snippetsFilters":{"enable":false},"terminationGracePeriodSeconds":30,"tolerations":[],"topologySpreadConstraints":[]}` |
+| `nginxGateway` | The nginxGateway section contains configuration for the NGINX Gateway Fabric control plane deployment. | object | `{"affinity":{},"autoscaling":{"annotations":{},"behavior":{},"enabled":false,"maxReplicas":11,"minReplicas":1,"targetCPUUtilizationPercentage":50,"targetMemoryUtilizationPercentage":50},"autoscalingTemplate":[],"config":{"logging":{"level":"info"}},"configAnnotations":{},"extraVolumeMounts":[],"extraVolumes":[],"gatewayClassAnnotations":{},"gatewayClassName":"nginx","gatewayControllerName":"gateway.nginx.org/nginx-gateway-controller","gwAPIExperimentalFeatures":{"enable":false},"image":{"pullPolicy":"Always","repository":"ghcr.io/nginx/nginx-gateway-fabric","tag":"edge"},"kind":"deployment","labels":{},"leaderElection":{"enable":true,"lockName":""},"lifecycle":{},"metrics":{"enable":true,"port":9113,"secure":false},"nodeSelector":{},"podAnnotations":{},"productTelemetry":{"enable":true},"readinessProbe":{"enable":true,"initialDelaySeconds":3,"port":8081},"replicas":1,"resources":{},"service":{"annotations":{},"labels":{}},"serviceAccount":{"annotations":{},"imagePullSecret":"","imagePullSecrets":[],"name":""},"snippetsFilters":{"enable":false},"terminationGracePeriodSeconds":30,"tolerations":[],"topologySpreadConstraints":[]}` |
 | `nginxGateway.affinity` | The affinity of the NGINX Gateway Fabric control plane pod. | object | `{}` |
 | `nginxGateway.config.logging.level` | Log level. | string | `"info"` |
 | `nginxGateway.configAnnotations` | Set of custom annotations for NginxGateway objects. | object | `{}` |

charts/nginx-gateway-fabric/values.schema.json

@@ -540,6 +540,62 @@
           "title": "affinity",
           "type": "object"
         },
+        "autoscaling": {
+          "properties": {
+            "annotations": {
+              "required": [],
+              "title": "annotations",
+              "type": "object"
+            },
+            "behavior": {
+              "required": [],
+              "title": "behavior",
+              "type": "object"
+            },
+            "enabled": {
+              "default": false,
+              "description": "Enable or disable Horizontal Pod Autoscaler",
+              "required": [],
+              "title": "enabled",
+              "type": "boolean"
+            },
+            "maxReplicas": {
+              "default": 11,
+              "required": [],
+              "title": "maxReplicas",
+              "type": "integer"
+            },
+            "minReplicas": {
+              "default": 1,
+              "required": [],
+              "title": "minReplicas",
+              "type": "integer"
+            },
+            "targetCPUUtilizationPercentage": {
+              "default": 50,
+              "required": [],
+              "title": "targetCPUUtilizationPercentage",
+              "type": "integer"
+            },
+            "targetMemoryUtilizationPercentage": {
+              "default": 50,
+              "required": [],
+              "title": "targetMemoryUtilizationPercentage",
+              "type": "integer"
+            }
+          },
+          "required": [],
+          "title": "autoscaling",
+          "type": "object"
+        },
+        "autoscalingTemplate": {
+          "items": {
+            "required": []
+          },
+          "required": [],
+          "title": "autoscalingTemplate",
+          "type": "array"
+        },
         "config": {
           "description": "The dynamic configuration for the control plane that is contained in the NginxGateway resource.",
           "properties": {