Log invalid requests without blockingv3.16+
Run the Request Validator plugin in tap mode.
In tap mode, validation runs as normal, but failed requests aren’t blocked. Instead, Kong Gateway logs a warning with the validation details and proxies the request to the upstream service unchanged.
Configure the plugin to use the kong validator to check that the request body contains a name field with a string value, and set config.enforcement_mode to log_only so that requests failing validation are logged instead of blocked.
In this example, an empty body ({}) is proxied through unchanged with a 200 response. Kong Gateway logs:
``` [warn] request-validator: validation failed in log_only mode, validation_category=body_schema, {“message”:”required field missing: name”}
When config.verbose_response is enabled, the log names the specific field that failed.
When it’s disabled, it logs a generic validation-failure message instead.
Add this section to your kong.yaml configuration file:
_format_version: "3.0"
plugins:
- name: request-validator
config:
version: kong
body_schema: '[{"name":{"type":"string","required":true}}]'
enforcement_mode: log_only
verbose_response: trueMake the following request:
curl -i -X POST http://localhost:8001/plugins/ \
--header "Accept: application/json" \
--header "Content-Type: application/json" \
--data '
{
"name": "request-validator",
"config": {
"version": "kong",
"body_schema": "[{\"name\":{\"type\":\"string\",\"required\":true}}]",
"enforcement_mode": "log_only",
"verbose_response": true
}
}
'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 $KONNECT_TOKEN" \
--data '
{
"name": "request-validator",
"config": {
"version": "kong",
"body_schema": "[{\"name\":{\"type\":\"string\",\"required\":true}}]",
"enforcement_mode": "log_only",
"verbose_response": true
}
}
'Make sure to replace the following placeholders with your own values:
-
region: Geographic region where your Kong Konnect is hosted and operates. -
KONNECT_TOKEN: Your Personal Access Token (PAT) associated with your Konnect account. -
controlPlaneId: Theidof the control plane.
See the Konnect Control Planes Config API reference to learn about region-specific URLs and personal access tokens.
echo "
apiVersion: configuration.konghq.com/v1
kind: KongClusterPlugin
metadata:
name: request-validator
namespace: kong
annotations:
kubernetes.io/ingress.class: kong
labels:
global: 'true'
config:
version: kong
body_schema: '[{'name':{'type':'string','required':true}}]'
enforcement_mode: log_only
verbose_response: true
plugin: request-validator
" | kubectl apply -f -Prerequisite: Configure your Personal Access Token
terraform {
required_providers {
konnect = {
source = "kong/konnect"
}
}
}
provider "konnect" {
personal_access_token = "$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_request_validator" "my_request_validator" {
enabled = true
config = {
version = "kong"
body_schema = "[{\"name\":{\"type\":\"string\",\"required\":true}}]"
enforcement_mode = "log_only"
verbose_response = true
}
control_plane_id = konnect_gateway_control_plane.my_konnect_cp.id
}Add this section to your kong.yaml configuration file:
_format_version: "3.0"
plugins:
- name: request-validator
service: serviceName|Id
config:
version: kong
body_schema: '[{"name":{"type":"string","required":true}}]'
enforcement_mode: log_only
verbose_response: trueMake 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": "request-validator",
"config": {
"version": "kong",
"body_schema": "[{\"name\":{\"type\":\"string\",\"required\":true}}]",
"enforcement_mode": "log_only",
"verbose_response": true
}
}
'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 $KONNECT_TOKEN" \
--data '
{
"name": "request-validator",
"config": {
"version": "kong",
"body_schema": "[{\"name\":{\"type\":\"string\",\"required\":true}}]",
"enforcement_mode": "log_only",
"verbose_response": true
}
}
'Make sure to replace the following placeholders with your own values:
-
region: Geographic region where your Kong Konnect is hosted and operates. -
KONNECT_TOKEN: Your Personal Access Token (PAT) associated with your Konnect account. -
controlPlaneId: Theidof the control plane. -
serviceId: Theidof the service the plugin configuration will target.
See the Konnect Control Planes Config API reference to learn about region-specific URLs and personal access tokens.
echo "
apiVersion: configuration.konghq.com/v1
kind: KongPlugin
metadata:
name: request-validator
namespace: kong
annotations:
kubernetes.io/ingress.class: kong
config:
version: kong
body_schema: '[{'name':{'type':'string','required':true}}]'
enforcement_mode: log_only
verbose_response: true
plugin: request-validator
" | kubectl apply -f -Next, apply the KongPlugin resource by annotating the service resource:
kubectl annotate -n kong service SERVICE_NAME konghq.com/plugins=request-validatorPrerequisite: Configure your Personal Access Token
terraform {
required_providers {
konnect = {
source = "kong/konnect"
}
}
}
provider "konnect" {
personal_access_token = "$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_request_validator" "my_request_validator" {
enabled = true
config = {
version = "kong"
body_schema = "[{\"name\":{\"type\":\"string\",\"required\":true}}]"
enforcement_mode = "log_only"
verbose_response = true
}
control_plane_id = konnect_gateway_control_plane.my_konnect_cp.id
service = {
id = konnect_gateway_service.my_service.id
}
}Add this section to your kong.yaml configuration file:
_format_version: "3.0"
plugins:
- name: request-validator
route: routeName|Id
config:
version: kong
body_schema: '[{"name":{"type":"string","required":true}}]'
enforcement_mode: log_only
verbose_response: trueMake 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": "request-validator",
"config": {
"version": "kong",
"body_schema": "[{\"name\":{\"type\":\"string\",\"required\":true}}]",
"enforcement_mode": "log_only",
"verbose_response": true
}
}
'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 $KONNECT_TOKEN" \
--data '
{
"name": "request-validator",
"config": {
"version": "kong",
"body_schema": "[{\"name\":{\"type\":\"string\",\"required\":true}}]",
"enforcement_mode": "log_only",
"verbose_response": true
}
}
'Make sure to replace the following placeholders with your own values:
-
region: Geographic region where your Kong Konnect is hosted and operates. -
KONNECT_TOKEN: Your Personal Access Token (PAT) associated with your Konnect account. -
controlPlaneId: Theidof the control plane. -
routeId: Theidof the route the plugin configuration will target.
See the Konnect Control Planes Config API reference to learn about region-specific URLs and personal access tokens.
echo "
apiVersion: configuration.konghq.com/v1
kind: KongPlugin
metadata:
name: request-validator
namespace: kong
annotations:
kubernetes.io/ingress.class: kong
config:
version: kong
body_schema: '[{'name':{'type':'string','required':true}}]'
enforcement_mode: log_only
verbose_response: true
plugin: request-validator
" | kubectl apply -f -Next, apply the KongPlugin resource by annotating the httproute or ingress resource:
kubectl annotate -n kong httproute konghq.com/plugins=request-validatorkubectl annotate -n kong ingress konghq.com/plugins=request-validatorPrerequisite: Configure your Personal Access Token
terraform {
required_providers {
konnect = {
source = "kong/konnect"
}
}
}
provider "konnect" {
personal_access_token = "$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_request_validator" "my_request_validator" {
enabled = true
config = {
version = "kong"
body_schema = "[{\"name\":{\"type\":\"string\",\"required\":true}}]"
enforcement_mode = "log_only"
verbose_response = true
}
control_plane_id = konnect_gateway_control_plane.my_konnect_cp.id
route = {
id = konnect_gateway_route.my_route.id
}
}Add this section to your kong.yaml configuration file:
_format_version: "3.0"
plugins:
- name: request-validator
consumer: consumerName|Id
config:
version: kong
body_schema: '[{"name":{"type":"string","required":true}}]'
enforcement_mode: log_only
verbose_response: trueMake 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": "request-validator",
"config": {
"version": "kong",
"body_schema": "[{\"name\":{\"type\":\"string\",\"required\":true}}]",
"enforcement_mode": "log_only",
"verbose_response": true
}
}
'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 $KONNECT_TOKEN" \
--data '
{
"name": "request-validator",
"config": {
"version": "kong",
"body_schema": "[{\"name\":{\"type\":\"string\",\"required\":true}}]",
"enforcement_mode": "log_only",
"verbose_response": true
}
}
'Make sure to replace the following placeholders with your own values:
-
region: Geographic region where your Kong Konnect is hosted and operates. -
KONNECT_TOKEN: Your Personal Access Token (PAT) associated with your Konnect account. -
controlPlaneId: Theidof the control plane. -
consumerId: Theidof the consumer the plugin configuration will target.
See the Konnect Control Planes Config API reference to learn about region-specific URLs and personal access tokens.
echo "
apiVersion: configuration.konghq.com/v1
kind: KongPlugin
metadata:
name: request-validator
namespace: kong
annotations:
kubernetes.io/ingress.class: kong
config:
version: kong
body_schema: '[{'name':{'type':'string','required':true}}]'
enforcement_mode: log_only
verbose_response: true
plugin: request-validator
" | kubectl apply -f -Next, apply the KongPlugin resource by annotating the KongConsumer resource:
kubectl annotate -n kong kongconsumer CONSUMER_NAME konghq.com/plugins=request-validatorPrerequisite: Configure your Personal Access Token
terraform {
required_providers {
konnect = {
source = "kong/konnect"
}
}
}
provider "konnect" {
personal_access_token = "$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_request_validator" "my_request_validator" {
enabled = true
config = {
version = "kong"
body_schema = "[{\"name\":{\"type\":\"string\",\"required\":true}}]"
enforcement_mode = "log_only"
verbose_response = true
}
control_plane_id = konnect_gateway_control_plane.my_konnect_cp.id
consumer = {
id = konnect_gateway_consumer.my_consumer.id
}
}