From 1aaad5084f8aa06c1d427ed152f3e9db3ce59df6 Mon Sep 17 00:00:00 2001
From: Eduardo Silva <eduardo@chronosphere.io>
Date: Mon, 17 Mar 2025 09:47:11 -0600
Subject: [PATCH] out_opentelemetry: switch config property 'http2' default to
'off'
We have received many reports that Fluent Bit cannot send data
to the OpenTelemetry Collector over a plain text communication, this
is happening because we enabled http2 by default so when the Otel Collector
receives the request (PRI * HTTP/2.0...) it drops the connection.
This PR switches http2 default to off so users don't run into this
problem.
Signed-off-by: Eduardo Silva <eduardo@chronosphere.io>
---
plugins/out_opentelemetry/opentelemetry.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/plugins/out_opentelemetry/opentelemetry.c b/plugins/out_opentelemetry/opentelemetry.c
index 8855e9ec6f8..9ace9f1c068 100644
--- a/plugins/out_opentelemetry/opentelemetry.c
+++ b/plugins/out_opentelemetry/opentelemetry.c
@@ -284,6 +284,7 @@ int opentelemetry_post(struct opentelemetry_context *ctx,
if (request->protocol_version == HTTP_PROTOCOL_VERSION_20 &&
ctx->enable_grpc_flag) {
+
grpc_body = cfl_sds_create_size(body_len + 5);
if (grpc_body == NULL) {
@@ -819,7 +820,7 @@ static struct flb_config_map config_map[] = {
"Adds a custom label to the metrics use format: 'add_label name value'"
},
{
- FLB_CONFIG_MAP_STR, "http2", "on",
+ FLB_CONFIG_MAP_STR, "http2", "off",
0, FLB_TRUE, offsetof(struct opentelemetry_context, enable_http2),
"Enable, disable or force HTTP/2 usage. Accepted values : on, off, force"
},