feat(metrics): add flag to enable WASM metrics

charts/osm/README.md

@@ -74,6 +74,7 @@ The following table lists the configurable parameters of the osm chart and their
 | OpenServiceMesh.enablePermissiveTrafficPolicy | bool | `false` | Enable permissive traffic policy mode |
 | OpenServiceMesh.enablePrivilegedInitContainer | bool | `false` | Run init container in privileged mode |
 | OpenServiceMesh.enablePrometheusScraping | bool | `true` | Enable Prometheus metrics scraping on sidecar proxies |
+| OpenServiceMesh.enableWASMStatsExperimental | bool | `false` | Enable extra Envoy statistics generated by a custom WASM extension |
 | OpenServiceMesh.enforceSingleMesh | bool | `false` | Enforce only deploying one mesh in the cluster |
 | OpenServiceMesh.envoyLogLevel | string | `"error"` | Envoy log level is used to specify the level of logs collected from envoy |
 | OpenServiceMesh.fluentBit.enableProxySupport | bool | `false` | Enable proxy support toggle for Fluent Bit |

charts/osm/templates/osm-deployment.yaml

@@ -48,6 +48,9 @@ spec:
             "--cert-manager-issuer-name", "{{.Values.OpenServiceMesh.certmanager.issuerName}}",
             "--cert-manager-issuer-kind", "{{.Values.OpenServiceMesh.certmanager.issuerKind}}",
             "--cert-manager-issuer-group", "{{.Values.OpenServiceMesh.certmanager.issuerGroup}}",
+            {{- if .Values.OpenServiceMesh.enableWASMStatsExperimental }}
+            "--stats-wasm-experimental",
+            {{- end }}
           ]
           resources:
             limits:

charts/osm/values.schema.json

@@ -464,6 +464,15 @@
                         ""
                     ]
                 },
+                "enableWASMStatsExperimental": {
+                    "$id": "#/properties/OpenServiceMesh/properties/enableWASMStatsExperimental",
+                    "type": "boolean",
+                    "title": "Enable WASM Stats",
+                    "description": "Enable extra Envoy statistics generated by a custom WASM extension",
+                    "examples": [
+                        false
+                    ]
+                },
                 "osmNamespace": {
                     "$id": "#/properties/OpenServiceMesh/properties/osmNamespace",
                     "type": "string",

charts/osm/values.yaml

@@ -106,6 +106,8 @@ OpenServiceMesh:
   enforceSingleMesh: false
   # -- Validating- and MutatingWebhookConfiguration name
   webhookConfigNamePrefix: osm-webhook
+  # -- Enable extra Envoy statistics generated by a custom WASM extension
+  enableWASMStatsExperimental: false
 
   # -- Optional parameter. If not specified, the release namespace is used to deploy the osm components.
   osmNamespace: ""

cmd/osm-controller/osm-controller.go

@@ -100,6 +100,9 @@ func init() {
 	flags.StringVar(&certManagerOptions.IssuerKind, "cert-manager-issuer-kind", "Issuer", "cert-manager issuer kind")
 	flags.StringVar(&certManagerOptions.IssuerGroup, "cert-manager-issuer-group", "cert-manager.io", "cert-manager issuer group")
 
+	// feature flags
+	flags.BoolVar(&optionalFeatures.WASMStats, "stats-wasm-experimental", false, "Enable a WebAssembly module that generates additional Envoy statistics.")
+
 	_ = clientgoscheme.AddToScheme(scheme)
 	_ = v1beta1.AddToScheme(scheme)
 }