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Sign InMinimal container image for running NodeJS apps
Chainguard Images are regularly-updated, minimal container images with low-to-zero CVEs.
This image is available on cgr.dev
:
Be sure to replace the ORGANIZATION
placeholder with the name used for your organization's private repository within the Chainguard registry.
This brief example is derived from our Getting Started with Node guide which is itself based on the Docker Node example. It involves setting up an example Node application, building the application into a container image using the Chainguard Node Image, and then testing the newly-built image.
You can set up our example Node application by cloning the node
directory from our edu-images-demos
repository.
Because the Node demo application code is stored in a repository with other examples, we don’t need to pull down every file from this repository. For this reason, this command includes the --sparse
option. This will initialize a sparse-checkout file, causing the working directory to contain only the files in the root of the repository until the sparse-checkout configuration is modified.
Navigate into the new directory.
To retrieve the files you need for this sample application, run the following git
command.
This modifies the sparse-checkout configuration initialized in the previous git clone
command so that the checkout only consists of the repo’s node
directory.
Navigate into the new node
directory.
From within this directory, run the following command to create a new package.json
file:
Next, install the application dependencies. Specifically, you'll need ronin-server
and ronin-mocks
. These will create a "mock" server that saves JSON data in memory and returns it in subsequent GET requests to the same endpoint.
After setting up the application, it can be built into a container image using the Dockerfile included in the example repository.
This Dockerfile will perform the following actions:
cgr.dev/chainguard/node:latest
image;/app
inside the container;/app
location in the container;npm install
to install production-only dependencies;node
), specifying which script to run.Build the application image with the following command:
Once the build is finished, run the image:
Although the application is running from within a container, this command will cause it to block your terminal we set up a port redirect to receive requests on localhost:8000
as the application waits for connections on port 8000
.
From a new terminal window, run the following command. This will make a POST request to your application sending a JSON payload:
If the connection is successful, you will receive output like this in the terminal where the application is running:
You can now query the same endpoint to receive the data that was stored in memory when you run the previous command:
When you're finished, you can close the application by pressing CTRL+C
(CMD+C
if you're using macOS).
If you have a Zendesk account (typically set up for you by your Customer Success Manager) you can reach out to Chainguard's Customer Success team through our Zendesk portal.
Chainguard Images are a collection of container images designed for security and minimalism.
Many Chainguard Images are distroless; they contain only an open-source application and its runtime dependencies. These images do not even contain a shell or package manager. Chainguard Images are built with Wolfi, our Linux undistro designed to produce container images that meet the requirements of a secure software supply chain.
The main features of Chainguard Images include:
-dev
VariantsAs mentioned previously, Chainguard’s distroless Images have no shell or package manager by default. This is great for security, but sometimes you need these things, especially in builder images. For those cases, most (but not all) Chainguard Images come paired with a -dev
variant which does include a shell and package manager.
Although the -dev
image variants have similar security features as their distroless versions, such as complete SBOMs and signatures, they feature additional software that is typically not necessary in production environments. The general recommendation is to use the -dev
variants only to build the application and then copy all application artifacts into a distroless image, which will result in a final container image that has a minimal attack surface and won’t allow package installations or logins.
That being said, it’s worth noting that -dev
variants of Chainguard Images are completely fine to run in production environments. After all, the -dev
variants are still more secure than many popular container images based on fully-featured operating systems such as Debian and Ubuntu since they carry less software, follow a more frequent patch cadence, and offer attestations for what they include.
To better understand how to work with Chainguard Images, we encourage you to visit Chainguard Academy, our documentation and education platform.
Chainguard Images contain software packages that are direct or transitive dependencies. The following licenses were found in the "latest" version of this image:
Apache-2.0
Artistic-2.0
BSD-2-Clause
GCC-exception-3.1
GPL-2.0-only
GPL-2.0-or-later
GPL-3.0-or-later
For a complete list of licenses, please refer to this Image's SBOM.
Software license agreementThis is a FIPS validated image for FedRAMP compliance.
This image is STIG hardened and scanned against the DISA General Purpose Operating System SRG with reports available.
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