jiazhizhong/higress
1
0
Fork 0
mirror of https://github.com/alibaba/higress.git synced 2026-06-09 20:57:32 +08:00
Code Issues Packages Projects Releases Wiki Activity

feat: add MCP SSE stateful session load balancer support (#2818)

Browse Source
This commit is contained in:
澄潭
2025-08-28 20:52:07 +08:00
committed by GitHub
parent a00b810be5
commit fff5903007
10 changed files with 235 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

109
pkg/ingress/config/ingress_config.go
View File

@@ -628,6 +628,7 @@ func (m *IngressConfig) convertEnvoyFilter(convertOptions *common.ConvertOptions
mappings := map[string]*common.Rule{}
initHttp2RpcGlobalConfig := true
initMcpSseGlobalFilter := true
for _, routes := range convertOptions.HTTPRoutes {
for _, route := range routes {
if strings.HasSuffix(route.HTTPRoute.Name, "app-root") {
@@ -647,6 +648,19 @@ func (m *IngressConfig) convertEnvoyFilter(convertOptions *common.ConvertOptions
}
}
loadBalance := route.WrapperConfig.AnnotationsConfig.LoadBalance
if loadBalance != nil && loadBalance.McpSseStateful {
IngressLog.Infof("Found MCP SSE stateful session for route %s", route.HTTPRoute.Name)
envoyFilter, err := m.constructMcpSseStatefulSessionEnvoyFilter(route, m.namespace, initMcpSseGlobalFilter)
if err != nil {
IngressLog.Errorf("Construct MCP SSE stateful session EnvoyFilter error %v", err)
} else {
IngressLog.Infof("Append MCP SSE stateful session EnvoyFilter for route %s", route.HTTPRoute.Name)
envoyFilters = append(envoyFilters, *envoyFilter)
initMcpSseGlobalFilter = false
}
}
auth := route.WrapperConfig.AnnotationsConfig.Auth
if auth == nil {
continue
@@ -1511,7 +1525,7 @@ func (m *IngressConfig) constructHttp2RpcEnvoyFilter(http2rpcConfig *annotations
return &config.Config{
Meta: config.Meta{
GroupVersionKind: gvk.EnvoyFilter,
Name: common.CreateConvertedName(constants.IstioIngressGatewayName, "http2rpc", http2rpcConfig.Name, "route", httpRoute.Name),
Name: common.CreateConvertedName(constants.IstioIngressGatewayName, "http2rpc", http2rpcConfig.Name, "route", common.ConvertToDNSLabelValid(httpRoute.Name)),
Namespace: namespace,
},
Spec: &networking.EnvoyFilter{
@@ -1940,6 +1954,99 @@ func (m *IngressConfig) Delete(config.GroupVersionKind, string, string, *string)
return common.ErrUnsupportedOp
}
func (m *IngressConfig) constructMcpSseStatefulSessionEnvoyFilter(route *common.WrapperHTTPRoute, namespace string, initGlobalFilter bool) (*config.Config, error) {
httpRoute := route.HTTPRoute
var configPatches []*networking.EnvoyFilter_EnvoyConfigObjectPatch
// Add global HTTP filter if this is the first route using MCP SSE stateful session
if initGlobalFilter {
configPatches = append(configPatches, &networking.EnvoyFilter_EnvoyConfigObjectPatch{
ApplyTo: networking.EnvoyFilter_HTTP_FILTER,
Match: &networking.EnvoyFilter_EnvoyConfigObjectMatch{
Context: networking.EnvoyFilter_GATEWAY,
ObjectTypes: &networking.EnvoyFilter_EnvoyConfigObjectMatch_Listener{
Listener: &networking.EnvoyFilter_ListenerMatch{
FilterChain: &networking.EnvoyFilter_ListenerMatch_FilterChainMatch{
Filter: &networking.EnvoyFilter_ListenerMatch_FilterMatch{
Name: "envoy.filters.network.http_connection_manager",
SubFilter: &networking.EnvoyFilter_ListenerMatch_SubFilterMatch{
Name: "envoy.filters.http.router",
},
},
},
},
},
},
Patch: &networking.EnvoyFilter_Patch{
Operation: networking.EnvoyFilter_Patch_INSERT_BEFORE,
Value: buildPatchStruct(`{
"name": "envoy.filters.http.mcp_sse_stateful_session",
"typed_config": {
"@type": "type.googleapis.com/udpa.type.v1.TypedStruct",
"type_url": "type.googleapis.com/envoy.extensions.filters.http.mcp_sse_stateful_session.v3alpha.McpSseStatefulSession"
}
}`),
},
})
}
// Add route-specific configuration
configPatches = append(configPatches, &networking.EnvoyFilter_EnvoyConfigObjectPatch{
ApplyTo: networking.EnvoyFilter_HTTP_ROUTE,
Match: &networking.EnvoyFilter_EnvoyConfigObjectMatch{
Context: networking.EnvoyFilter_GATEWAY,
ObjectTypes: &networking.EnvoyFilter_EnvoyConfigObjectMatch_RouteConfiguration{
RouteConfiguration: &networking.EnvoyFilter_RouteConfigurationMatch{
Vhost: &networking.EnvoyFilter_RouteConfigurationMatch_VirtualHostMatch{
Route: &networking.EnvoyFilter_RouteConfigurationMatch_RouteMatch{
Name: httpRoute.Name,
},
},
},
},
},
Patch: &networking.EnvoyFilter_Patch{
Operation: networking.EnvoyFilter_Patch_MERGE,
Value: buildPatchStruct(`{
"typed_per_filter_config": {
"envoy.filters.http.mcp_sse_stateful_session": {
"@type": "type.googleapis.com/udpa.type.v1.TypedStruct",
"type_url": "type.googleapis.com/envoy.extensions.filters.http.mcp_sse_stateful_session.v3alpha.McpSseStatefulSessionPerRoute",
"value": {
"mcp_sse_stateful_session": {
"session_state": {
"name": "envoy.http.mcp_sse_stateful_session.envelope",
"typed_config": {
"@type": "type.googleapis.com/udpa.type.v1.TypedStruct",
"type_url": "type.googleapis.com/envoy.extensions.http.mcp_sse_stateful_session.envelope.v3alpha.EnvelopeSessionState",
"value": {
"param_name": "sessionId",
"chunk_end_patterns": ["\r\n\r\n", "\n\n", "\r\r"]
}
}
},
"strict": true
}
}
}
}
}`),
},
})
return &config.Config{
Meta: config.Meta{
GroupVersionKind: gvk.EnvoyFilter,
Name: common.CreateConvertedName(constants.IstioIngressGatewayName, "mcp-lb-route", common.ConvertToDNSLabelValid(httpRoute.Name)),
Namespace: namespace,
},
Spec: &networking.EnvoyFilter{
ConfigPatches: configPatches,
},
}, nil
}
func (m *IngressConfig) notifyXDSFullUpdate(gvk config.GroupVersionKind, reason istiomodel.TriggerReason, updatedConfigName *util.ClusterNamespacedName) {
var configsUpdated map[istiomodel.ConfigKey]struct{}
if updatedConfigName != nil {