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k3s-root

==========

NOTE: this repository has been recently (2020-11-18) moved out of the github.com/rancher org to github.com/k3s-io supporting the acceptance of K3s as a CNCF sandbox project.


k3s-root is based on https://github.com/buildroot/buildroot and provides the userspace binaries for rancher/k3s

Building

k3s-root is dapper powered, which means you should be able to simply make on your machine to compile. By default, make will compile for amd64. If you want to compile for other architectures, you can run commands like:

make ARCH=arm64

or alternatively, if you want to compile all architectures at once, you can run:

make all-build

If it is not the first time you build, delete the directories artifacts/ and dist/ to avoid problems when creating the symbolic link in the package step

sudo rm -r artifacts/ dist/

The default way of building this project is through container using dapper. If you want to tinker and have more control over the build process, it is more practical to use Vagrant with the existing Vagrantfile

Upgrading to new buildroot version

To upgrade to a new buildroot version, you must follow 4 steps:

1 - Modify the BUILDROOT_VERSION in scripts/download

2 - Check what is the busybox version in the new buildroot package. Then, upgrade the package/busybox.config by cloning the busybox project and then:

git checkout $busybox_version
cp $K3S_ROOT_PATH/package/busybox.config .config
make oldconfig
# Choose the new options
cp .config $K3S_ROOT_PATH/package/busybox.config

3 - Follow the same steps with the buildroot/ configurations. The command make oldconfig also works in the buildroot project

4 - Verify if the upgrade worked correctly by comparing the old tarball and the new one. If the same files are there, then you are set

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K3s agent user space binaries

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