負載回報服務 (LRS)

負載回報服務提供一種機制，讓 Envoy 可以定期向管理伺服器發出負載回報。

這將會與管理伺服器建立雙向串流。連線後，管理伺服器可以將 LoadStatsResponse 發送給它有興趣取得負載回報的節點。此節點中的 Envoy 將開始發送 LoadStatsRequest。這是根據 負載回報間隔 定期完成的。

帶有 LRS 的 Envoy 組態範例

envoy.yaml
 1static_resources:
 2  listeners:
 3  - address:
 4      socket_address:
 5        address: 0.0.0.0
 6        port_value: 80
 7    filter_chains:
 8    - filters:
 9      - name: envoy.filters.network.http_connection_manager
10        typed_config:
11          "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager
12          codec_type: AUTO
13          stat_prefix: ingress_http
14          route_config:
15            name: local_route
16            virtual_hosts:
17            - name: service
18              domains:
19              - "*"
20              routes:
21              - match:
22                  prefix: "/service"
23                route:
24                  cluster: local_service
25          http_filters:
26          - name: envoy.filters.http.router
27            typed_config:
28              "@type": type.googleapis.com/envoy.extensions.filters.http.router.v3.Router
29  clusters:
30  - name: local_service
31    type: STRICT_DNS
32    lb_policy: ROUND_ROBIN
33    load_assignment:
34      cluster_name: local_service
35      endpoints:
36      - lb_endpoints:
37        - endpoint:
38            address:
39              socket_address:
40                address: http_service
41                port_value: 8080
42  - name: load_reporting_cluster
43    type: STRICT_DNS
44    lb_policy: ROUND_ROBIN
45    typed_extension_protocol_options:
46      envoy.extensions.upstreams.http.v3.HttpProtocolOptions:
47        "@type": type.googleapis.com/envoy.extensions.upstreams.http.v3.HttpProtocolOptions
48        explicit_http_config:
49          http2_protocol_options: {}
50    load_assignment:
51      cluster_name: load_reporting_cluster
52      endpoints:
53      - lb_endpoints:
54        - endpoint:
55            address:
56              socket_address:
57                address: lrs_server
58                port_value: 18000
59cluster_manager:
60  load_stats_config:
61    api_type: GRPC
62    grpc_services:
63    - envoy_grpc:
64        cluster_name: load_reporting_cluster
65admin:
66  address:
67    socket_address:
68      address: 0.0.0.0
69      port_value: 8081