在 istio 中为 envoy 启用 http 标头日志记录

我希望能够捕获（日志）（至少部分）envoy我的 HTTP 标头istio服务网格。

我已经经历过envoy's docs https://www.envoyproxy.io/docs/envoy/latest/start/quick-start/run-envoy#debugging-envoy，并且在日志级别部分中，它没有提及任何特定于标头的信息。

目前，我的istio-proxy日志是这样的（这是来自stern输出）：

mysvc-69c46fbc75-d9v8j istio-proxy {"bytes_sent":"124","upstream_cluster":"inbound|80|http|mysvc.default.svc.cluster.local","downstream_remote_address":"10.11.11.1:0","authority":"some.url.com","path":"/health?source=dd_cluster_agent","protocol":"HTTP/1.1","upstream_service_time":"1","upstream_local_address":"127.0.0.1:40406","duration":"2","upstream_transport_failure_reason":"-","route_name":"default","downstream_local_address":"10.11.32.32:20000","user_agent":"Datadog Agent/7.24.0","response_code":"200","response_flags":"-","start_time":"2021-01-17T18:54:57.449Z","method":"GET","request_id":"61ae63c7-aa10-911b-9562-939kdhd49ddhj","upstream_host":"127.0.0.1:20000","x_forwarded_for":"10.16.32.1","requested_server_name":"outbound_.80_.mysvc_.faros.default.svc.cluster.local","bytes_received":"0","istio_policy_status":"-"}

有没有办法登录http标题？ （理想情况下some其中，以控制伐木成本）

edit1按照评论中的建议，我检查了我的istio-operator资源，我看到访问日志记录似乎已启用

    meshConfig:
      accessLogEncoding: JSON
      accessLogFile: /dev/stdout

edit2我还尝试过以下方法：

curl -i -H "Custom-Header: application/json" https://my.url.net

但在日志中istio-ingressgateway我没有看到我的自定义标头

istio-ingressgateway-58f69d8696-rmpwn istio-proxy {"user_agent":"curl/7.64.1","response_code":"200","response_flags":"-","start_time":"2021-01-18T19:02:48.645Z","method":"GET","request_id":"8e32c93c-484d-9c56-9489-8c5392793d97","upstream_host":"10.16.32.55:20000","x_forwarded_for":"10.16.32.1","requested_server_name":"my.url.net","bytes_received":"0","istio_policy_status":"-","bytes_sent":"124","upstream_cluster":"outbound|80||mysvc.default.svc.cluster.local","downstream_remote_address":"10.16.32.1:52804","authority":"my.url.net","path":"/","protocol":"HTTP/2","upstream_service_time":"9","upstream_local_address":"10.16.32.17:49826","duration":"10","upstream_transport_failure_reason":"-","route_name":"-","downstream_local_address":"10.16.32.17:8443"}

我想我已经成功复制了您的问题并且能够打印MY_CUSTOM_HEADER在入口网关日志中。

我的 istio 入口网关日志有一部分。

[2021-01-20T08:26:18.587Z] pkarambol GET /productpage HTTP/1.1 200

我使用了下面的curl命令：

curl -v -H "MY_CUSTOM_HEADER: pkarambol" xx.xxx.xx.xxx/productpage

为了实现这一点，你必须改变默认格式 https://www.envoyproxy.io/docs/envoy/latest/configuration/observability/access_log/usage?fbclid=IwAR0xaS-EtEniJfbpGWf-GN_o75aLSpyn5FI2Uojp9YPWQD4PjQqs9ObqavQ#default-format-string的日志。正如在文档 https://istio.io/latest/docs/tasks/observability/logs/access-log/#enable-envoy-s-access-logging， 您可以使用meshConfig.accessLogFormat改变这一点。

有一个例子Istio 运营商 https://istio.io/latest/docs/setup/install/operator/我用过。

%REQ(MY_CUSTOM_HEADER)%是负责显示自定义标头的部分。

apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
metadata:
  namespace: istio-system
  name: example-istiocontrolplane
spec:
  profile: demo
  meshConfig:
    accessLogFile: /dev/stdout
    accessLogFormat: "[%START_TIME%] %REQ(MY_CUSTOM_HEADER)% %REQ(:METHOD)% %REQ(X-ENVOY-ORIGINAL-PATH?:PATH)% %PROTOCOL%
%RESPONSE_CODE% %RESPONSE_FLAGS% %BYTES_RECEIVED% %BYTES_SENT% %DURATION%
%RESP(X-ENVOY-UPSTREAM-SERVICE-TIME)% %REQ(X-FORWARDED-FOR)% %REQ(USER-AGENT)%
%REQ(X-REQUEST-ID)% %REQ(:AUTHORITY)% %UPSTREAM_HOST%\n"