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| K3s is a easier to use version of kubernetes. It bundles all components of a kubernetes cluster into one single binary. | | [https://k3s.io/ K3s] is a simplified [[Kubernetes]] version that bundles Kubernetes cluster components into a few small binaries optimized for Edge and IoT devices. |
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| == Single node setup ==
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| <syntaxHighlight lang=nix>
| | NixOS's K3s documentation is available at: |
| {
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| # This is required so that pod can reach the API server (running on port 6443 by default)
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| networking.firewall.allowedTCPPorts = [ 6443 ];
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| services.k3s.enable = true;
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| services.k3s.role = "server";
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| services.k3s.extraFlags = toString [
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| # "--kubelet-arg=v=4" # Optionally add additional args to k3s
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| ];
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| }
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| </syntaxHighlight>
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| After enabling you can access you cluster through <code>k3s kubectl</code> i.e. <code>k3s kubectl cluster-info</code>, or by using the generated kubeconfig file in <code>/etc/rancher/k3s/k3s.yaml</code>
| | https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/networking/cluster/k3s/README.md |
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| == ZFS support ==
| | [[Category:Container]] |
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| k3s's builtin containerd does not support the zfs snapshotter. However it is possible to configure it to use an external containerd:
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| <syntaxHighlight lang=nix>
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| virtualisation.containerd.enable = true;
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| # TODO describe how to enable zfs snapshotter in containerd
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| services.k3s.extraFlags = toString [
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| "--container-runtime-endpoint unix:///run/containerd/containerd.sock"
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| ];
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| </syntaxHighlight>
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| [[Category:Applications]]
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| [[Category:Server]] | |