Forward HTTP headers as Kafka record headers (blocklist mode)v3.15+
Use blocklist mode (forward_all_by_default: true) to forward every incoming HTTP header as a Kafka record header,
except for headers listed in exclude_headers.
This is useful for stripping sensitive headers like authorization or cookie while preserving all others.
Prerequisites
-
Kafka installed and running
Environment variables
-
KAFKA_TOPIC: The name of your Kafka topic.
Add this section to your kong.yaml configuration file:
_format_version: "3.0"
plugins:
- name: kafka-upstream
config:
topic: ${{ env "DECK_KAFKA_TOPIC" }}
headers:
forward_http_headers_as_record_headers: true
forward_all_by_default: true
exclude_headers:
- authorization
- cookie
repeated_headers_behavior: retain_duplicatesMake the following request:
curl -i -X POST http://localhost:8001/plugins/ \
--header "Accept: application/json" \
--header "Content-Type: application/json" \
--data '
{
"name": "kafka-upstream",
"config": {
"topic": "'$KAFKA_TOPIC'",
"headers": {
"forward_http_headers_as_record_headers": true,
"forward_all_by_default": true,
"exclude_headers": [
"authorization",
"cookie"
],
"repeated_headers_behavior": "retain_duplicates"
}
},
"tags": []
}
'Make the following request:
curl -X POST https://{region}.api.konghq.com/v2/control-planes/{controlPlaneId}/core-entities/plugins/ \
--header "accept: application/json" \
--header "Content-Type: application/json" \
--header "Authorization: Bearer $KONNECT_TOKEN" \
--data '
{
"name": "kafka-upstream",
"config": {
"topic": "'$KAFKA_TOPIC'",
"headers": {
"forward_http_headers_as_record_headers": true,
"forward_all_by_default": true,
"exclude_headers": [
"authorization",
"cookie"
],
"repeated_headers_behavior": "retain_duplicates"
}
},
"tags": []
}
'Make sure to replace the following placeholders with your own values:
-
region: Geographic region where your Kong Konnect is hosted and operates. -
KONNECT_TOKEN: Your Personal Access Token (PAT) associated with your Konnect account. -
controlPlaneId: Theidof the control plane.
See the Konnect API reference to learn about region-specific URLs and personal access tokens.
echo "
apiVersion: configuration.konghq.com/v1
kind: KongClusterPlugin
metadata:
name: kafka-upstream
namespace: kong
annotations:
kubernetes.io/ingress.class: kong
konghq.com/tags: ''
labels:
global: 'true'
config:
topic: '$KAFKA_TOPIC'
headers:
forward_http_headers_as_record_headers: true
forward_all_by_default: true
exclude_headers:
- authorization
- cookie
repeated_headers_behavior: retain_duplicates
plugin: kafka-upstream
" | kubectl apply -f -Prerequisite: Configure your Personal Access Token
terraform {
required_providers {
konnect = {
source = "kong/konnect"
}
}
}
provider "konnect" {
personal_access_token = "$KONNECT_TOKEN"
server_url = "https://us.api.konghq.com/"
}Add the following to your Terraform configuration to create a Konnect Gateway Plugin:
resource "konnect_gateway_plugin_kafka_upstream" "my_kafka_upstream" {
enabled = true
config = {
topic = var.kafka_topic
headers = {
forward_http_headers_as_record_headers = true
forward_all_by_default = true
exclude_headers = ["authorization", "cookie"]
repeated_headers_behavior = "retain_duplicates"
}
}
tags = []
control_plane_id = konnect_gateway_control_plane.my_konnect_cp.id
}This example requires the following variables to be added to your manifest. You can specify values at runtime by setting TF_VAR_name=value.
variable "kafka_topic" {
type = string
}Add this section to your kong.yaml configuration file:
_format_version: "3.0"
plugins:
- name: kafka-upstream
service: serviceName|Id
config:
topic: ${{ env "DECK_KAFKA_TOPIC" }}
headers:
forward_http_headers_as_record_headers: true
forward_all_by_default: true
exclude_headers:
- authorization
- cookie
repeated_headers_behavior: retain_duplicatesMake sure to replace the following placeholders with your own values:
-
serviceName|Id: Theidornameof the service the plugin configuration will target.
Make the following request:
curl -i -X POST http://localhost:8001/services/{serviceName|Id}/plugins/ \
--header "Accept: application/json" \
--header "Content-Type: application/json" \
--data '
{
"name": "kafka-upstream",
"config": {
"topic": "'$KAFKA_TOPIC'",
"headers": {
"forward_http_headers_as_record_headers": true,
"forward_all_by_default": true,
"exclude_headers": [
"authorization",
"cookie"
],
"repeated_headers_behavior": "retain_duplicates"
}
},
"tags": []
}
'Make sure to replace the following placeholders with your own values:
-
serviceName|Id: Theidornameof the service the plugin configuration will target.
Make the following request:
curl -X POST https://{region}.api.konghq.com/v2/control-planes/{controlPlaneId}/core-entities/services/{serviceId}/plugins/ \
--header "accept: application/json" \
--header "Content-Type: application/json" \
--header "Authorization: Bearer $KONNECT_TOKEN" \
--data '
{
"name": "kafka-upstream",
"config": {
"topic": "'$KAFKA_TOPIC'",
"headers": {
"forward_http_headers_as_record_headers": true,
"forward_all_by_default": true,
"exclude_headers": [
"authorization",
"cookie"
],
"repeated_headers_behavior": "retain_duplicates"
}
},
"tags": []
}
'Make sure to replace the following placeholders with your own values:
-
region: Geographic region where your Kong Konnect is hosted and operates. -
KONNECT_TOKEN: Your Personal Access Token (PAT) associated with your Konnect account. -
controlPlaneId: Theidof the control plane. -
serviceId: Theidof the service the plugin configuration will target.
See the Konnect API reference to learn about region-specific URLs and personal access tokens.
echo "
apiVersion: configuration.konghq.com/v1
kind: KongPlugin
metadata:
name: kafka-upstream
namespace: kong
annotations:
kubernetes.io/ingress.class: kong
konghq.com/tags: ''
config:
topic: '$KAFKA_TOPIC'
headers:
forward_http_headers_as_record_headers: true
forward_all_by_default: true
exclude_headers:
- authorization
- cookie
repeated_headers_behavior: retain_duplicates
plugin: kafka-upstream
" | kubectl apply -f -Next, apply the KongPlugin resource by annotating the service resource:
kubectl annotate -n kong service SERVICE_NAME konghq.com/plugins=kafka-upstreamPrerequisite: Configure your Personal Access Token
terraform {
required_providers {
konnect = {
source = "kong/konnect"
}
}
}
provider "konnect" {
personal_access_token = "$KONNECT_TOKEN"
server_url = "https://us.api.konghq.com/"
}Add the following to your Terraform configuration to create a Konnect Gateway Plugin:
resource "konnect_gateway_plugin_kafka_upstream" "my_kafka_upstream" {
enabled = true
config = {
topic = var.kafka_topic
headers = {
forward_http_headers_as_record_headers = true
forward_all_by_default = true
exclude_headers = ["authorization", "cookie"]
repeated_headers_behavior = "retain_duplicates"
}
}
tags = []
control_plane_id = konnect_gateway_control_plane.my_konnect_cp.id
service = {
id = konnect_gateway_service.my_service.id
}
}This example requires the following variables to be added to your manifest. You can specify values at runtime by setting TF_VAR_name=value.
variable "kafka_topic" {
type = string
}Add this section to your kong.yaml configuration file:
_format_version: "3.0"
plugins:
- name: kafka-upstream
route: routeName|Id
config:
topic: ${{ env "DECK_KAFKA_TOPIC" }}
headers:
forward_http_headers_as_record_headers: true
forward_all_by_default: true
exclude_headers:
- authorization
- cookie
repeated_headers_behavior: retain_duplicatesMake sure to replace the following placeholders with your own values:
-
routeName|Id: Theidornameof the route the plugin configuration will target.
Make the following request:
curl -i -X POST http://localhost:8001/routes/{routeName|Id}/plugins/ \
--header "Accept: application/json" \
--header "Content-Type: application/json" \
--data '
{
"name": "kafka-upstream",
"config": {
"topic": "'$KAFKA_TOPIC'",
"headers": {
"forward_http_headers_as_record_headers": true,
"forward_all_by_default": true,
"exclude_headers": [
"authorization",
"cookie"
],
"repeated_headers_behavior": "retain_duplicates"
}
},
"tags": []
}
'Make sure to replace the following placeholders with your own values:
-
routeName|Id: Theidornameof the route the plugin configuration will target.
Make the following request:
curl -X POST https://{region}.api.konghq.com/v2/control-planes/{controlPlaneId}/core-entities/routes/{routeId}/plugins/ \
--header "accept: application/json" \
--header "Content-Type: application/json" \
--header "Authorization: Bearer $KONNECT_TOKEN" \
--data '
{
"name": "kafka-upstream",
"config": {
"topic": "'$KAFKA_TOPIC'",
"headers": {
"forward_http_headers_as_record_headers": true,
"forward_all_by_default": true,
"exclude_headers": [
"authorization",
"cookie"
],
"repeated_headers_behavior": "retain_duplicates"
}
},
"tags": []
}
'Make sure to replace the following placeholders with your own values:
-
region: Geographic region where your Kong Konnect is hosted and operates. -
KONNECT_TOKEN: Your Personal Access Token (PAT) associated with your Konnect account. -
controlPlaneId: Theidof the control plane. -
routeId: Theidof the route the plugin configuration will target.
See the Konnect API reference to learn about region-specific URLs and personal access tokens.
echo "
apiVersion: configuration.konghq.com/v1
kind: KongPlugin
metadata:
name: kafka-upstream
namespace: kong
annotations:
kubernetes.io/ingress.class: kong
konghq.com/tags: ''
config:
topic: '$KAFKA_TOPIC'
headers:
forward_http_headers_as_record_headers: true
forward_all_by_default: true
exclude_headers:
- authorization
- cookie
repeated_headers_behavior: retain_duplicates
plugin: kafka-upstream
" | kubectl apply -f -Next, apply the KongPlugin resource by annotating the httproute or ingress resource:
kubectl annotate -n kong httproute konghq.com/plugins=kafka-upstreamkubectl annotate -n kong ingress konghq.com/plugins=kafka-upstreamPrerequisite: Configure your Personal Access Token
terraform {
required_providers {
konnect = {
source = "kong/konnect"
}
}
}
provider "konnect" {
personal_access_token = "$KONNECT_TOKEN"
server_url = "https://us.api.konghq.com/"
}Add the following to your Terraform configuration to create a Konnect Gateway Plugin:
resource "konnect_gateway_plugin_kafka_upstream" "my_kafka_upstream" {
enabled = true
config = {
topic = var.kafka_topic
headers = {
forward_http_headers_as_record_headers = true
forward_all_by_default = true
exclude_headers = ["authorization", "cookie"]
repeated_headers_behavior = "retain_duplicates"
}
}
tags = []
control_plane_id = konnect_gateway_control_plane.my_konnect_cp.id
route = {
id = konnect_gateway_route.my_route.id
}
}This example requires the following variables to be added to your manifest. You can specify values at runtime by setting TF_VAR_name=value.
variable "kafka_topic" {
type = string
}Add this section to your kong.yaml configuration file:
_format_version: "3.0"
plugins:
- name: kafka-upstream
consumer: consumerName|Id
config:
topic: ${{ env "DECK_KAFKA_TOPIC" }}
headers:
forward_http_headers_as_record_headers: true
forward_all_by_default: true
exclude_headers:
- authorization
- cookie
repeated_headers_behavior: retain_duplicatesMake sure to replace the following placeholders with your own values:
-
consumerName|Id: Theidornameof the consumer the plugin configuration will target.
Make the following request:
curl -i -X POST http://localhost:8001/consumers/{consumerName|Id}/plugins/ \
--header "Accept: application/json" \
--header "Content-Type: application/json" \
--data '
{
"name": "kafka-upstream",
"config": {
"topic": "'$KAFKA_TOPIC'",
"headers": {
"forward_http_headers_as_record_headers": true,
"forward_all_by_default": true,
"exclude_headers": [
"authorization",
"cookie"
],
"repeated_headers_behavior": "retain_duplicates"
}
},
"tags": []
}
'Make sure to replace the following placeholders with your own values:
-
consumerName|Id: Theidornameof the consumer the plugin configuration will target.
Make the following request:
curl -X POST https://{region}.api.konghq.com/v2/control-planes/{controlPlaneId}/core-entities/consumers/{consumerId}/plugins/ \
--header "accept: application/json" \
--header "Content-Type: application/json" \
--header "Authorization: Bearer $KONNECT_TOKEN" \
--data '
{
"name": "kafka-upstream",
"config": {
"topic": "'$KAFKA_TOPIC'",
"headers": {
"forward_http_headers_as_record_headers": true,
"forward_all_by_default": true,
"exclude_headers": [
"authorization",
"cookie"
],
"repeated_headers_behavior": "retain_duplicates"
}
},
"tags": []
}
'Make sure to replace the following placeholders with your own values:
-
region: Geographic region where your Kong Konnect is hosted and operates. -
KONNECT_TOKEN: Your Personal Access Token (PAT) associated with your Konnect account. -
controlPlaneId: Theidof the control plane. -
consumerId: Theidof the consumer the plugin configuration will target.
See the Konnect API reference to learn about region-specific URLs and personal access tokens.
echo "
apiVersion: configuration.konghq.com/v1
kind: KongPlugin
metadata:
name: kafka-upstream
namespace: kong
annotations:
kubernetes.io/ingress.class: kong
konghq.com/tags: ''
config:
topic: '$KAFKA_TOPIC'
headers:
forward_http_headers_as_record_headers: true
forward_all_by_default: true
exclude_headers:
- authorization
- cookie
repeated_headers_behavior: retain_duplicates
plugin: kafka-upstream
" | kubectl apply -f -Next, apply the KongPlugin resource by annotating the KongConsumer resource:
kubectl annotate -n kong kongconsumer CONSUMER_NAME konghq.com/plugins=kafka-upstreamPrerequisite: Configure your Personal Access Token
terraform {
required_providers {
konnect = {
source = "kong/konnect"
}
}
}
provider "konnect" {
personal_access_token = "$KONNECT_TOKEN"
server_url = "https://us.api.konghq.com/"
}Add the following to your Terraform configuration to create a Konnect Gateway Plugin:
resource "konnect_gateway_plugin_kafka_upstream" "my_kafka_upstream" {
enabled = true
config = {
topic = var.kafka_topic
headers = {
forward_http_headers_as_record_headers = true
forward_all_by_default = true
exclude_headers = ["authorization", "cookie"]
repeated_headers_behavior = "retain_duplicates"
}
}
tags = []
control_plane_id = konnect_gateway_control_plane.my_konnect_cp.id
consumer = {
id = konnect_gateway_consumer.my_consumer.id
}
}This example requires the following variables to be added to your manifest. You can specify values at runtime by setting TF_VAR_name=value.
variable "kafka_topic" {
type = string
}