mirror of https://github.com/k3s-io/k3s
41 lines
1.6 KiB
Markdown
41 lines
1.6 KiB
Markdown
## Kubernetes-optimized images
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This directory contains manifests for building Kubernetes-optimized images for
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various clouds (currently just AWS). It is currently highly experimental, and
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these images are not used by default (though you can pass `AWS_IMAGE` to the
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AWS kube-up script if you're feeling brave).
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Advantages of an optimized image:
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* We can preinstall packages that would otherwise require a download. Great
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for speed, and also for reliability (in case the source repository is down)
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* We can make kernel configuration changes that might otherwise require a
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reboot, or even apply kernel patches if we really want to. For example,
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Debian requires a kernel boot parameter to enable the cgroup memory
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controller, which we require.
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* The more configuration we can do in advance, the easier it is for people that
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don't want to use kube-up to get a cluster up and running.
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Advantages of a harmonized image:
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* All the platforms can test with the same versions of software, rather than
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relying on whatever image happens to be optimal on that cloud.
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## bootstrap-vz
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Currently images are built using
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[bootstrap-vz](https://github.com/andsens/bootstrap-vz), because this is
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default builder for the official Debian images, and because it supports
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multiple clouds including AWS, Azure & GCE. It also supports KVM, which should
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support OpenStack.
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## Building an image
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A go program/script to build images in
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[in progress](https://github.com/kubernetes/contrib/pull/486), in the contrib
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project.
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[]()
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