I am trying to debug why some requests are failing and increased the logging level with the command below:
istioctl proxy-config log kubectl select pod --level http:debug,router:debug
And below are the logs:
2020-07-04T13:44:47.217743Z debug envoy http [external/envoy/source/common/http/conn_manager_impl.cc:781] [C10659][S779203182681781930] request headers complete (end_stream=true):
':authority', 'catalog.istioinaction.io'
':path', '/items'
':method', 'GET'
'user-agent', 'curl/7.64.1'
'accept', '*/*'
2020-07-04T13:44:47.217791Z debug envoy http [external/envoy/source/common/http/conn_manager_impl.cc:1333] [C10659][S779203182681781930] request end stream
2020-07-04T13:44:47.217915Z debug envoy router [external/envoy/source/common/router/router.cc:477] [C10659][S779203182681781930] cluster 'outbound|80|version-v2|catalog.istioinaction.svc.cluster.local' match for URL '/items'
2020-07-04T13:44:47.217983Z debug envoy http [external/envoy/source/common/http/conn_manager_impl.cc:1475] [C10659][S779203182681781930] Sending local reply with details no_healthy_upstream
2020-07-04T13:44:47.218040Z debug envoy http [external/envoy/source/common/http/conn_manager_impl.cc:1706] [C10659][S779203182681781930] encoding headers via codec (end_stream=false):
':status', '503'
'content-length', '19'
'content-type', 'text/plain'
'date', 'Sat, 04 Jul 2020 13:44:47 GMT'
'server', 'istio-envoy'
Sections which I was not able to find documentation on either on envoyproxy.io or in istio.io is the meaning of this section [C10659][S779203182681781930]
Is this a request identifier of some sorts? (As it would make sense), can you link me to some docs explaining this?