daroche/nginx-otel-nix
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Redirect gRPC and Protobuf logs into Nginx error log.

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By default, these libraries may log directly into stderr.
This commit is contained in:
Pavel Pautov 2023-02-07 22:16:29 -08:00 • committed by Dmitry Plotnikov
parent fda8e8d207
commit bdf7d9066e
1 changed files with 28 additions and 0 deletions
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28
src/http_module.cpp
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@ -4,6 +4,9 @@ extern "C" {
#include <ngx_http.h>
}
#include <grpc/support/log.h>
#include <google/protobuf/stubs/logging.h>
#include "str_view.hpp"
#include "trace_context.hpp"
#include "batch_exporter.hpp"
@ -475,6 +478,28 @@ ngx_int_t onRequestEnd(ngx_http_request_t* r)
return NGX_DECLINED;
}
void grpcLogHandler(gpr_log_func_args* args)
{
ngx_uint_t level = args->severity == GPR_LOG_SEVERITY_ERROR ? NGX_LOG_ERR :
args->severity == GPR_LOG_SEVERITY_INFO ? NGX_LOG_INFO :
/*GPR_LOG_SEVERITY_DEBUG*/ NGX_LOG_DEBUG;
ngx_log_error(level, ngx_cycle->log, 0, "OTel/grpc: %s", args->message);
}
void protobufLogHandler(google::protobuf::LogLevel logLevel,
const char* filename, int line, const std::string& msg)
{
using namespace google::protobuf;
ngx_uint_t level = logLevel == LOGLEVEL_FATAL ? NGX_LOG_EMERG :
logLevel == LOGLEVEL_ERROR ? NGX_LOG_ERR :
logLevel == LOGLEVEL_WARNING ? NGX_LOG_WARN :
/*LOGLEVEL_INFO*/ NGX_LOG_INFO;
ngx_log_error(level, ngx_cycle->log, 0, "OTel/protobuf: %s", msg.c_str());
}
ngx_int_t initModule(ngx_conf_t* cf)
{
auto cmcf = (ngx_http_core_main_conf_t*)ngx_http_conf_get_module_main_conf(
@ -496,6 +521,9 @@ ngx_int_t initModule(ngx_conf_t* cf)
*h = onRequestEnd;
gpr_set_log_function(grpcLogHandler);
google::protobuf::SetLogHandler(protobufLogHandler);
return NGX_OK;
}