Envoy：主动健康监测
2024-09-02 16:20:45
实验文件
docker-compose
version: '3'
services:
envoy:
image: envoyproxy/envoy-alpine:v1.15-latest
environment:
- ENVOY_UID=0
- HEALTHY=ok
ports:
- 80:80
- 443:443
- 82:9901
volumes:
- ./envoy.yaml:/etc/envoy/envoy.yaml
- ./certs:/etc/envoy/certs
networks:
envoymesh:
aliases:
- envoy
depends_on:
- webserver1
- webserver2
webserver1:
image: sealloong/envoy-end:latest
environment:
- COLORFUL=blue
- HEALTHY=ok
networks:
envoymesh:
aliases:
- myservice
- webservice
expose:
- 90
webserver2:
image: sealloong/envoy-end:latest
environment:
- COLORFUL=blue
networks:
envoymesh:
aliases:
- myservice
- webservice
expose:
- 90
networks:
envoymesh: {}
envoy配置文件
admin:
access_log_path: /dev/null
address:
socket_address: { address: 0.0.0.0, port_value: 9901 }
static_resources:
listeners:
- name: listener_0
address:
socket_address: { address: 0.0.0.0, port_value: 80 }
filter_chains:
- filters:
- name: envoy_http_connection_manager
typed_config:
"@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager
stat_prefix: ingress_http
codec_type: AUTO
route_config:
name: local_route
virtual_hosts:
- name: local_service
domains: [ "*" ]
routes:
- match: { prefix: "/" }
route: { cluster: local_service }
http_filters:
- name: envoy.filters.http.router
clusters:
- name: local_service
connect_timeout: 0.25s
type: STRICT_DNS
lb_policy: ROUND_ROBIN
load_assignment:
cluster_name: local_service
endpoints:
- lb_endpoints:
- endpoint:
address:
socket_address: { address: webservice, port_value: 90 }
health_checks:
timeout: 1s
interval: 10s
unhealthy_threshold: 5
healthy_threshold: 5
http_health_check:
path: "/ping"
expected_statuses:
start: 200
end: 201
路由
/ping 健康监测的路由
/ping/ok 手动将节点设置为有效节点
/ping/fail 手动将节点设置为失效
测试结论
[root@redis ~]# curl -s 127.0.0.1:82/clusters|grep health
local_service::172.22.0.2:90::health_flags::healthy
local_service::172.22.0.3:90::health_flags::healthy
当在集群启动时，所有节点默认为健康状态，在没有流量进入时，默认的间隔时间为1分钟。
当有外部流量进入后，在结束上个默认间隔1分钟之后，会成为配置文件设置的默认10s
手动设置一个节点为不健康状态，
日志中可以看出，在手动设置为失效时，请求是不会到达后端失效节点，并且第一次请求时间明显长，在设置为成功时，后端节点判定为健康是在4次健康监测而非正常请求
webserver1_1 | [GIN] 2020/09/13 - 02:00:48 | 200 | 110.706µs | 172.22.0.4 | GET "/"
webserver2_1 | [GIN] 2020/09/13 - 02:00:48 | 200 | 47.29µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:00:49 | 200 | 14.909µs | 172.22.0.4 | GET "/"
webserver2_1 | [GIN] 2020/09/13 - 02:01:18 | 200 | 58.53µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:01:19 | 200 | 15.988µs | 172.22.0.4 | GET "/"
webserver2_1 | [GIN] 2020/09/13 - 02:01:42 | 200 | 20.844µs | 172.22.0.4 | GET "/ping"
webserver1_1 | [GIN] 2020/09/13 - 02:01:42 | 200 | 12.247µs | 172.22.0.4 | GET "/ping"
webserver1_1 | [GIN] 2020/09/13 - 02:01:52 | 200 | 38.892µs | 172.22.0.4 | GET "/ping"
webserver2_1 | [GIN] 2020/09/13 - 02:01:52 | 200 | 32.254µs | 172.22.0.4 | GET "/ping"
webserver2_1 | [GIN] 2020/09/13 - 02:01:54 | 200 | 33.689µs | ::1 | GET "/ping/fail"
webserver2_1 | [GIN] 2020/09/13 - 02:01:59 | 200 | 82.86µs | ::1 | GET "/ping/fail"
webserver1_1 | [GIN] 2020/09/13 - 02:02:02 | 200 | 155.202µs | 172.22.0.4 | GET "/ping"
webserver2_1 | [GIN] 2020/09/13 - 02:02:02 | 502 | 26.73µs | 172.22.0.4 | GET "/ping"
webserver1_1 | [GIN] 2020/09/13 - 02:02:07 | 200 | 19.193µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:02:08 | 200 | 14.651µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:02:09 | 200 | 15.101µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:02:09 | 200 | 15.294µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:02:10 | 200 | 26.45µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:02:10 | 200 | 17.679µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:02:11 | 200 | 14.703µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:02:11 | 200 | 14.546µs | 172.22.0.4 | GET "/"
webserver2_1 | [GIN] 2020/09/13 - 02:02:12 | 502 | 8.37µs | 172.22.0.4 | GET "/ping"
webserver1_1 | [GIN] 2020/09/13 - 02:02:12 | 200 | 14.214µs | 172.22.0.4 | GET "/ping"
webserver2_1 | [GIN] 2020/09/13 - 02:02:22 | 502 | 8.998µs | 172.22.0.4 | GET "/ping"
webserver1_1 | [GIN] 2020/09/13 - 02:02:22 | 200 | 13.489µs | 172.22.0.4 | GET "/ping"
webserver2_1 | [GIN] 2020/09/13 - 02:02:30 | 200 | 119.326µs | ::1 | GET "/ping/ok"
webserver1_1 | [GIN] 2020/09/13 - 02:02:32 | 200 | 8.864µs | 172.22.0.4 | GET "/ping"
webserver2_1 | [GIN] 2020/09/13 - 02:02:32 | 200 | 14.679µs | 172.22.0.4 | GET "/ping"
webserver1_1 | [GIN] 2020/09/13 - 02:02:38 | 200 | 14.781µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:02:39 | 200 | 15.452µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:02:39 | 200 | 14.825µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:02:40 | 200 | 14.784µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:02:40 | 200 | 14.788µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:02:41 | 200 | 72.985µs | 172.22.0.4 | GET "/"
webserver2_1 | [GIN] 2020/09/13 - 02:02:42 | 200 | 8.523µs | 172.22.0.4 | GET "/ping"
webserver1_1 | [GIN] 2020/09/13 - 02:02:42 | 200 | 14.497µs | 172.22.0.4 | GET "/ping"
webserver1_1 | [GIN] 2020/09/13 - 02:02:42 | 200 | 15.611µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:02:47 | 200 | 46.065µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:02:47 | 200 | 19.455µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:02:47 | 200 | 15.079µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:02:48 | 200 | 22.208µs | 172.22.0.4 | GET "/"
webserver2_1 | [GIN] 2020/09/13 - 02:02:52 | 200 | 39.693µs | 172.22.0.4 | GET "/ping"
webserver1_1 | [GIN] 2020/09/13 - 02:02:52 | 200 | 32.376µs | 172.22.0.4 | GET "/ping"
webserver1_1 | [GIN] 2020/09/13 - 02:03:02 | 200 | 19.476µs | 172.22.0.4 | GET "/ping"
webserver2_1 | [GIN] 2020/09/13 - 02:03:02 | 200 | 11.041µs | 172.22.0.4 | GET "/ping"
webserver2_1 | [GIN] 2020/09/13 - 02:03:12 | 200 | 14.292µs | 172.22.0.4 | GET "/ping"
webserver1_1 | [GIN] 2020/09/13 - 02:03:12 | 200 | 8.215µs | 172.22.0.4 | GET "/ping"
webserver1_1 | [GIN] 2020/09/13 - 02:03:22 | 200 | 16.145µs | 172.22.0.4 | GET "/ping"
webserver2_1 | [GIN] 2020/09/13 - 02:03:22 | 200 | 11.455µs | 172.22.0.4 | GET "/ping"
webserver1_1 | [GIN] 2020/09/13 - 02:03:29 | 200 | 15.02µs | 172.22.0.4 | GET "/"
webserver2_1 | [GIN] 2020/09/13 - 02:03:30 | 200 | 34.405µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:03:30 | 200 | 14.647µs | 172.22.0.4 | GET "/"
webserver2_1 | [GIN] 2020/09/13 - 02:03:30 | 200 | 15.039µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:03:31 | 200 | 16.706µs | 172.22.0.4 | GET "/"
webserver2_1 | [GIN] 2020/09/13 - 02:03:31 | 200 | 15.667µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:03:31 | 200 | 15.025µs | 172.22.0.4 | GET "/"
webserver1_1 | [GIN] 2020/09/13 - 02:03:32 | 200 | 15.085µs | 172.22.0.4 | GET "/ping"
webserver2_1 | [GIN] 2020/09/13 - 02:03:32 | 200 | 13.446µs | 172.22.0.4 | GET "/ping"
webserver2_1 | [GIN] 2020/09/13 - 02:03:42 | 200 | 14.702µs | 172.22.0.4 | GET "/ping"
webserver1_1 | [GIN] 2020/09/13 - 02:03:42 | 200 | 9.262µs | 172.22.0.4 | GET "/ping"
无外部流量时的请求间隔设置 官方参考
no_traffic_interval
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