creating kubernetes pods without using any public/private docker registory

Question

with a new release of our product, we want to move to new technologies(kubernetes) so that we can take advantage of it services. we have a local kubernetes application running in our infra. we have made our applicatons dockerize and now we want to use the images to integrate it with kubernetes to make cluster --pods, but we are stuck with docker registry as our customer do not want to have any public/private docker repository(registry) where we can upload this images. we have try with (docker save and docker load) but no luck(error: portal-66d9f557bb-dc6kq 0/1 ImagePullBackOff) Is it at all possible to have some filesystem where from we can access this images or any other alternative is welcome if that solves our problems(no private/public repository/registry).

Answer 1

A Docker registry of some sort is all but a requirement to run Kubernetes. Paid Docker Hub supports private images; Google and Amazon both have hosted registry products (GCR and ECR respectively); there are third-party registries; or you can deploy the official registry image locally.

There's an alternative path where you docker save every private image you reference in any Kubernetes pod spec, then docker load it on every single node. This has obvious scale and maintenance problems (whenever anybody updates any image you need to redeploy it by hand to every node). But if you really need to try this, make sure your pod specs specify ImagePullPolicy: Never to avoid trying to fetch things from registries. (If something isn't present on a node the pod will just fail to start up.)

The registry is "just" an open-source (Go) HTTP REST service that implements the Docker registry API, if that helps your deployment story.