更新时间:2022-02-11 12:36:29
部署在数据平面(即加入网格的Kubernetes集群)的Envoy Proxy可以输出所有访问日志,ASM支持自定义Envoy Proxy输出的访问日志内容。本文介绍如何自定义Envoy Proxy输出的访问日志内容。
启用访问日志(默认是开启状态),istio-proxy容器默认输出包含以下字段的日志,如果关闭访问日志,istio-proxy容器将不会产生JSON格式的访问日志。
"authority_for":"%REQ(:AUTHORITY)%",
"bytes_received":"%BYTES_RECEIVED%",
"bytes_sent":"%BYTES_SENT%",
"downstream_local_address":"%DOWNSTREAM_LOCAL_ADDRESS%",
"downstream_remote_address":"%DOWNSTREAM_REMOTE_ADDRESS%",
"duration":"%DURATION%",
"istio_policy_status":"%DYNAMIC_METADATA(istio.mixer:status)%",
"method":"%REQ(:METHOD)%",
"path":"%REQ(X-ENVOY-ORIGINAL-PATH?:PATH)%",
"protocol":"%PROTOCOL%",
"request_id":"%REQ(X-REQUEST-ID)%",
"requested_server_name":"%REQUESTED_SERVER_NAME%",
"response_code":"%RESPONSE_CODE%",
"response_flags":"%RESPONSE_FLAGS%",
"route_name":"%ROUTE_NAME%",
"start_time":"%START_TIME%",
"trace_id":"%REQ(X-B3-TRACEID)%",
"upstream_cluster":"%UPSTREAM_CLUSTER%",
"upstream_host":"%UPSTREAM_HOST%",
"upstream_local_address":"%UPSTREAM_LOCAL_ADDRESS%",
"upstream_service_time":"%RESP(X-ENVOY-UPSTREAM-SERVICE-TIME)%",
"upstream_transport_failure_reason":"%UPSTREAM_TRANSPORT_FAILURE_REASON%",
"user_agent":"%REQ(USER-AGENT)%",
"x_forwarded_for":"%REQ(X-FORWARDED-FOR)%"
本文以获取Bookinfo示例中HTTP请求的Header字段end-user为例
启用访问日志后,发起请求的Sidecar容器会按照自定义的访问日志格式输出访问日志。
在日志输出框中可以看到如下日志。
{
"method":"GET",
"x_forwarded_for":null,
"upstream_host":"172.19.16.90:9080",
"protocol":"HTTP/1.1",
"my_custom_key":"jason",
"authority_for":"addedvalues:9080",
"response_code":200,
"start_time":"2021-10-21T11:40:12.055Z",
"request_id":"5222b7fb-05a6-4fae-8e13-d44525ae3ca0",
"bytes_sent":883,
"downstream_remote_address":"172.19.16.11:33752",
"upstream_transport_failure_reason":null,
"downstream_local_address":"192.168.237.140:9080",
"requested_server_name":null,
"response_flags":"-",
"duration":4,
"user_agent":"python-requests/2.18.4",
"route_name":"default",
"trace_id":null,
"istio_policy_status":null,
"path":"/addedvalues/0",
"upstream_cluster":"outbound|9080||addedvalues.default.svc.cluster.local",
"bytes_received":0,
"upstream_service_time":"3",
"authority":"addedvalues:9080",
"upstream_local_address":"172.19.16.11:52430"
}
可以看到中包含名为end-user=jason用户的访问日志,说明自定义日志内容成功。
您还可以使用阿里云日志服务SLS采集数据平面的AccessLog,查看报表。具体操作,请参见使用日志服务采集数据平面入口网关日志。