envoy: Initial changes

internal/controlplane/grpc_accesslog.go

@@ -0,0 +1,39 @@
+package controlplane
+
+import (
+	envoy_service_accesslog_v2 "github.com/envoyproxy/go-control-plane/envoy/service/accesslog/v2"
+	"github.com/pomerium/pomerium/internal/log"
+)
+
+func (srv *Server) registerAccessLogHandlers() {
+	envoy_service_accesslog_v2.RegisterAccessLogServiceServer(srv.GRPCServer, srv)
+}
+
+// StreamAccessLogs receives logs from envoy and prints them to stdout.
+func (srv *Server) StreamAccessLogs(stream envoy_service_accesslog_v2.AccessLogService_StreamAccessLogsServer) error {
+	for {
+		msg, err := stream.Recv()
+		if err != nil {
+			log.Error().Err(err).Msg("access log stream error, disconnecting")
+			return err
+		}
+
+		for _, entry := range msg.GetHttpLogs().LogEntry {
+			evt := log.Info().Str("service", "envoy")
+			// common properties
+			evt = evt.Str("upstream-cluster", entry.GetCommonProperties().GetUpstreamCluster())
+			// request properties
+			evt = evt.Str("method", entry.GetRequest().GetRequestMethod().String())
+			evt = evt.Str("authority", entry.GetRequest().GetAuthority())
+			evt = evt.Str("path", entry.GetRequest().GetPath())
+			evt = evt.Str("user-agent", entry.GetRequest().GetUserAgent())
+			evt = evt.Str("referer", entry.GetRequest().GetReferer())
+			evt = evt.Str("forwarded-for", entry.GetRequest().GetForwardedFor())
+			evt = evt.Str("request-id", entry.GetRequest().GetRequestId())
+			// response properties
+			evt = evt.Uint32("response-code", entry.GetResponse().GetResponseCode().GetValue())
+			evt = evt.Str("response-code-details", entry.GetResponse().GetResponseCodeDetails())
+			evt.Msg("http-request")
+		}
+	}
+}