Notice! This project is unmaintained. You can use https://openkruise.io/en-us/docs/imagepulljob.html as an alternative

Pull container images to your nodes so that they are already present when containers are launched.

This repo was created following this gist: https://gist.github.com/itaysk/7bc3e56d69c4d72a549286d98fd557dd from this blog post: http://blog.itaysk.com/2017/12/26/the-single-use-daemonset-pattern-and-prepulling-images-in-kubernetes.

Usage

With Helm

See the Helm chart readme for comperhansive information, here's an example:

git clone https://github.com/itaysk/kube-imagepuller
cd kube-imagepuller
helm install imagepuller --set src.image=docker://index.docker.io/from/this:tag --set dst.image=docker-daemon:to/that:tag

Without Helm

You can use imagepuller.yaml which is generated from the Helm chart using

helm template imagepuller > imagepuller.yaml

1. Download the rendered manifest:

curl -L -O https://raw.githubusercontent.com/itaysk/kube-imagepuller/master/imagepuller.yaml

2. Edit the important parameters, most importantly the source, and destination images at:

spec.template.spec.initContainers[0].command

3. Create in Kubernetes:

kubectl create -f imagepuller.yaml