feat: add new ApisixGlobalRule resource to support global rules (#1586)

docs/en/latest/concepts/apisix_global_rule.md

@@ -0,0 +1,50 @@
+---
+title: ApisixGlobalRule
+keywords:
+  - APISIX ingress
+  - Apache APISIX
+  - ApisixGlobalRule
+description: Guide to using ApisixGlobalRule custom Kubernetes resource.
+---
+
+<!--
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+#
+-->
+
+`ApisixGlobalRule` is a Kubernetes CRD resource used to create an APISIX [global-rule](https://apisix.apache.org/docs/apisix/terminology/global-rule/) object, which can apply the [plugin](https://apisix.apache.org/docs/apisix/next/terminology/plugin/) to all requests.
+
+## Example
+
+Enable the [limit-count](https://apisix.apache.org/docs/apisix/next/plugins/limit-count/) plugin on the APISIX, which can limit all requests.
+
+```yaml
+apiVersion: apisix.apache.org/v2
+kind: ApisixGlobalRule
+metadata:
+  name: global
+spec:
+  plugins:
+    name: limit-count
+    enalbed: true 
+    config:
+      time_window": 60,
+      policy: "local",
+      count: 2,
+      key: "remote_addr",
+      rejected_code: 503
+```

docs/en/latest/references/apisix_global_rule_v2.md

@@ -0,0 +1,37 @@
+---
+title: ApisixGlobalRule/v2
+keywords:
+  - APISIX ingress
+  - Apache APISIX
+  - ApisixGlobalRule
+description: Reference for ApisixGlobalRule/v2 custom Kubernetes resource.
+---
+<!--
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+#
+-->
+
+## Spec
+
+,See the [definition](../concepts/apisix_global_rule.md) on GitHub.
+
+| Field            | Type    | Description                                                                                                                                    |
+|------------------|---------|------------------------------------------------------------------------------------------------------------------------------------------------|
+| plugins          | array   | Plugins that will be executed on the all requests.                                                                                                    |
+| plugins[].name   | string  | Name of the Plugin. See [Plugin hub](https://apisix.apache.org/plugins/) for a list of available Plugins.                                      |
+| plugins[].enable | boolean | When set to `true`, enables the Plugin.                                                                                                        |
+| plugins[].config | object  | Configuration of the Plugin, the schema is totally same to the one in APISIX. |

pkg/kube/apisix/apis/config/v2/types.go

@@ -758,3 +758,35 @@ type ApisixPluginConfigList struct {
 	metav1.ListMeta `json:"metadata" yaml:"metadata"`
 	Items           []ApisixPluginConfig `json:"items,omitempty" yaml:"items,omitempty"`
 }
+
+// +genclient
+// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
+// +kubebuilder:subresource:status
+
+// ApisixGlobalRule is the Schema for the ApisixGlobalRule resource.
+// An ApisixGlobalRule is used to support a group of plugin configs
+type ApisixGlobalRule struct {
+	metav1.TypeMeta   `json:",inline" yaml:",inline"`
+	metav1.ObjectMeta `json:"metadata" yaml:"metadata"`
+
+	// Spec defines the desired state of ApisixGlobalRuleSpec.
+	Spec   ApisixGlobalRuleSpec `json:"spec" yaml:"spec"`
+	Status ApisixStatus         `json:"status,omitempty" yaml:"status,omitempty"`
+}
+
+// ApisixGlobalRuleSpec defines the desired state of ApisixGlobalRuleSpec.
+type ApisixGlobalRuleSpec struct {
+	// Plugins contains a list of ApisixRoutePlugin
+	// +required
+	Plugins []ApisixRoutePlugin `json:"plugins" yaml:"plugins"`
+}
+
+// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
+// +kubebuilder:object:generate=true
+
+// ApisixGlobalRuleList contains a list of ApisixGlobalRule.
+type ApisixGlobalRuleList struct {
+	metav1.TypeMeta `json:",inline" yaml:",inline"`
+	metav1.ListMeta `json:"metadata" yaml:"metadata"`
+	Items           []ApisixGlobalRule `json:"items,omitempty" yaml:"items,omitempty"`
+}