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nats-server-config-reloader

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Chainguard Container for nats-server-config-reloader

Monitors NATS configuration files and triggers reloads without restarting the server.

Chainguard Containers are regularly-updated, secure-by-default container images.

Download this Container Image

For those with access, this container image is available on cgr.dev:

docker pull cgr.dev/ORGANIZATION/nats-server-config-reloader:latest

Be sure to replace the ORGANIZATION placeholder with the name used for your organization's private repository within the Chainguard Registry.

Compatibility Notes

This image provides a secure, minimal environment for hot-reloading NATS server configurations. It maintains functional parity with the upstream nats-server-config-reloader image and is compatible with NATS Server. Switching to the Chainguard image should not require changes to your existing Kubernetes setup, provided the config and PID file paths are correctly mounted.

Getting Started

The easiest way to deploy this image is with the NATS Helm Chart.

You can override the image by setting the following values in a values.yaml file.

 reloader:
  enabled: true
  image:
    registry: cgr.dev
    repository: ORGANIZATION/nats-server-config-reloader
    tag: latest
    pullPolicy: IfNotPresent

Be sure to replace the ORGANIZATION placeholder with the name used for your organization's private repository within the Chainguard registry.

Then, deploy the nats with reloader enabled

helm install nats nats/nats -f values.yaml --namespace default

Check that the pods are running

kubectl get pods -n default
NAME                        READY   STATUS    RESTARTS   AGE
nats-0                      2/2     Running   0          2m
nats-box-xxx-yyy            1/1     Running   0          2m

Also you can check the logs of container

kubectl logs nats-0 -c reloader
2025/03/14 06:41:44 Starting NATS Server Reloader v
2025/03/14 06:41:44 Watching file: /etc/nats-config/nats.conf
2025/03/14 06:41:44 Live, ready to kick pid 7 on config changes (files=1)

Documentation and Resources:

For more information, please refer to the official documentation for nats project.

What are Chainguard Containers?

Chainguard Containers are minimal container images that are secure by default.

In many cases, the Chainguard Containers tagged as :latest contain only an open-source application and its runtime dependencies. These minimal container images typically do not contain a shell or package manager. Chainguard Containers are built with Wolfi, our Linux undistro designed to produce container images that meet the requirements of a more secure software supply chain.

The main features of Chainguard Containers include:

For cases where you need container images with shells and package managers to build or debug, most Chainguard Containers come paired with a -dev variant.

Although the -dev container image variants have similar security features as their more minimal versions, they feature additional software that is typically not necessary in production environments. We recommend using multi-stage builds to leverage the -dev variants, copying application artifacts into a final minimal container that offers a reduced attack surface that won’t allow package installations or logins.

Learn More

To better understand how to work with Chainguard Containers, please visit Chainguard Academy and Chainguard Courses.

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Trademarks

This software listing is packaged by Chainguard. The trademarks set forth in this offering are owned by their respective companies, and use of them does not imply any affiliation, sponsorship, or endorsement by such companies.

Licenses

Chainguard container images contain software packages that are direct or transitive dependencies. The following licenses were found in the "latest" tag of this image:

  • Apache-2.0

  • BSD-3-Clause

  • GCC-exception-3.1

  • GPL-2.0-or-later

  • GPL-3.0-or-later

  • LGPL-2.1-or-later

  • MIT

For a complete list of licenses, please refer to this Image's SBOM.

Software license agreement

Compliance

A FIPS validated version of this image is available for FedRAMP compliance. STIG is included with FIPS image.


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