feat：Support SkyWalking to collect metrics (#238)

Signed-off-by: cobb-tx 464693850@qq.com

helm/core/templates/configmap.yaml

@@ -115,4 +115,64 @@ data:
 {{- include "mesh" . }}
 {{- end }}
 ---
+{{- if .Values.enableSkywalking  }}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: higress-custom-bootstrap
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "gateway.labels" . | nindent 4 }}
+data:
+  custom_bootstrap.json: |-
+    {
+      "stats_sinks": [
+        {
+          "name": "envoy.metrics_service",
+          "typed_config": {
+            "@type": "type.googleapis.com/envoy.config.metrics.v3.MetricsServiceConfig",
+            "transport_api_version": "V3",
+            "grpc_service": {
+              "envoy_grpc": {
+                "cluster_name": "service_skywalking"
+              }
+            }
+          }
+        }
+      ],
+      "static_resources": {
+        "clusters": [
+          {
+            "name": "service_skywalking",
+            "type": "LOGICAL_DNS",
+            "connect_timeout": "5s",
+            "http2_protocol_options": {
 
+            },
+            "dns_lookup_family": "V4_ONLY",
+            "lb_policy": "ROUND_ROBIN",
+            "load_assignment": {
+              "cluster_name": "service_skywalking",
+              "endpoints": [
+                {
+                  "lb_endpoints": [
+                    {
+                      "endpoint": {
+                        "address": {
+                          "socket_address": {
+                            "address": "{{ .Values.Skywalking.address }}",
+                            "port_value": "{{ .Values.Skywalking.port }}"
+                          }
+                        }
+                      }
+                    }
+                  ]
+                }
+              ]
+            }
+          }
+        ]
+      }
+    }
+---
+{{- end }}

helm/core/templates/deployment.yaml

@@ -136,6 +136,10 @@ spec:
             value: "{{ $.Values.clusterName | default `Kubernetes` }}"
           - name: INSTANCE_NAME
             value: "higress-gateway"
+          {{- if .Values.enableSkywalking }}
+          - name: ISTIO_BOOTSTRAP_OVERRIDE
+            value: /etc/istio/custom-bootstrap/custom_bootstrap.json
+          {{- end }}
           {{- with .Values.gateway.networkGateway }}
           - name: ISTIO_META_REQUESTED_NETWORK_VIEW
             value: "{{.}}"
@@ -188,6 +192,10 @@ spec:
             mountPath: /etc/istio/pod
           - name: proxy-socket
             mountPath: /etc/istio/proxy
+          {{- if .Values.enableSkywalking }}
+          - mountPath: /etc/istio/custom-bootstrap
+            name: custom-bootstrap-volume
+          {{- end }}
       {{- if .Values.gateway.hostNetwork }}
       hostNetwork: {{ .Values.gateway.hostNetwork }}
       dnsPolicy: ClusterFirstWithHostNet
@@ -224,7 +232,13 @@ spec:
       - name: config
         configMap:
           name: higress-config
-      - name: istio-data          
+      {{- if .Values.enableSkywalking }}
+      - configMap:
+          defaultMode: 420
+          name: higress-custom-bootstrap
+        name: custom-bootstrap-volume
+      {{- end }}
+      - name: istio-data
         emptyDir: {}
       - name: proxy-socket
         emptyDir: {}

helm/core/values.yaml

@@ -603,3 +603,10 @@ pilot:
 
   # Additional labels to apply on the pod level for monitoring and logging configuration.
   podLabels: {}
+
+
+# Skywalking config settings
+enableSkywalking: false
+Skywalking:
+  address: "skywalking-oap.higress-system.svc"
+  port: 11800