K3s: Difference between revisions

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imported>Mic92
add firewall.
imported>Mic92
describe zfs setup
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After enabling you can access you cluster through <code>k3s kubectl</code> i.e. <code>k3s kubectl cluster-info</code>
After enabling you can access you cluster through <code>k3s kubectl</code> i.e. <code>k3s kubectl cluster-info</code>
== ZFS support ==
k3s's builtin containerd does not support the zfs snapshotter. However it is possible to configure it to use an external containerd:
<syntaxHighlight lang=nix>
  virtualisation.containerd.enable = true;
  # TODO describe how to enable zfs snapshotter in containerd
  services.k3s.extraFlags = toString [
    "--container-runtime-endpoint unix:///run/containerd/containerd.sock"
  ];
</syntaxHighlight>

Revision as of 20:55, 31 May 2021

K3s is a easier to use version of kubernetes. It bundles all components of a kubernetes cluster into one single binary.

Single node setup

{
  # This is required so that pod can reach the API server (running on port 6443 by default)
  networking.firewall.allowedTCPPorts = [ 6443 ];
  services.k3s.enable = true;
  services.k3s.role = "server";
  services.k3s.extraFlags = toString [
    "--flannel-backend=none"
  ];
}

After enabling you can access you cluster through k3s kubectl i.e. k3s kubectl cluster-info

ZFS support

k3s's builtin containerd does not support the zfs snapshotter. However it is possible to configure it to use an external containerd:

  virtualisation.containerd.enable = true;
  # TODO describe how to enable zfs snapshotter in containerd
  services.k3s.extraFlags = toString [
    "--container-runtime-endpoint unix:///run/containerd/containerd.sock"
  ];