Set up App and API Protection for Nginx in Kubernetes

This product is not supported for your selected Datadog site. ().
このページは日本語には対応しておりません。随時翻訳に取り組んでいます。
翻訳に関してご質問やご意見ございましたら、お気軽にご連絡ください。

Your platform may be compatible with Datadog's Single Step Instrumentation, which automatically instruments your services at startup from the Datadog Agent.

Ingress-nginx support for Datadog

Ingress-nginx is a Kubernetes ingress controller that uses nginx as a reverse proxy and load balancer. In a Kubernetes cluster, external access is restricted by default for security reasons. An ingress controller uses rules to control how external traffic may reach your services.

The ingress-nginx controller is managed through Kubernetes resources, but customization of the underlying nginx configuration is typically limited beyond its intended use case. However, ingress-nginx allows the addition of extra nginx modules for extended functionality. To take advantage of this feature with nginx-datadog, we provide init containers.

How to enable nginx-datadog in ingress-nginx?

To integrate nginx-datadog with ingress-nginx, add a Datadog init container to your pod specification and configure nginx to load the nginx-datadog module.

The following Helm values demonstrate how to inject the nginx-datadog module into an ingress-nginx controller:

controller:
  config: 
    main-snippet: "load_module /modules_mount/ngx_http_datadog_module.so;"
  opentelemetry:
    enabled: false
  extraModules:
    - name: nginx-datadog
      image:
        registry: docker.io
        image: datadog/ingress-nginx-injection
        # The tag should match the version of the ingress-nginx controller
        # For example, this will inject the Datadog module for ingress v1.10.0
        # Check <https://hub.docker.com/repository/docker/datadog/ingress-nginx-injection/tags> 
        # for the list of all versions supported.
        tag: "v1.10.0"
        distroless: false

Check our details examples to help you set up ingress-nginx with nginx-datadog.

How does it work?

Init containers are special containers that run before the main container in a Kubernetes pod. In this case, the Datadog init container is responsible for copying the nginx-datadog module into a shared volume that will be accessible by the main ingress-nginx container.

When the main ingrees-nginx controller starts, the nginx configuration must be updated with the load_module directive, allowing it to load the Datadog module seamlessly.

We provide a specific init container **for each ingress-nginx controller version**, starting with v1.10.0. This is crucial because **each** init container must match the underlying nginx version. To ensure compatibility, ensure the version of the Datadog init container matches your ingress-nginx version.

Interaction with OpenTelemetry

By default, ingress-nginx includes an OpenTelemetry (oTel) module that can be enabled using the enable-opentelemetry: true setting in the ingress-nginx ConfigMap. However, if you are using nginx-datadog for tracing, we recommend disabling OpenTelemetry to prevent duplicate tracing data from both the oTel and Datadog modules.

To disable OpenTelemetry, set enable-opentelemetry: false.