Image Overview: karpenter

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Minimal image with Karpenter. EXPERIMENTAL

Get It!

The image is available on cgr.dev:

docker pull cgr.dev/chainguard/karpenter:latest

Using Karpenter

The Chainguard Karpenter image contains the karpenter controller and is a drop-in replacement for the upstream image.

To try it out, follow the official installation instructions but edit the Helm command to use the Chainguard image. To do this, you’ll first need to retrieve the digest of the Chainguard image, which you can do with crane or Docker:

$ DIGEST=$(crane digest --platform linux/amd64 cgr.dev/chainguard/karpenter:latest)
$ echo $DIGEST
sha256:8a178372c9e105300104d48065d61022fe1bd268737edaba4ac83e2c10159276

$ docker manifest inspect cgr.dev/chainguard/karpenter | \
  jq '.manifests[] | select(.platform.architecture == "amd64").digest'
$ echo $DIGEST
sha256:8a178372c9e105300104d48065d61022fe1bd268737edaba4ac83e2c10159276

Note that you need to specify the platform required to get the correct digest.

Finally, edit the helm upgrade command to include the following lines:

--set controller.image.repository=cgr.dev/chainguard/karpenter \
--set controller.image.digest=$DIGEST \