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Microk8s

Microk8s is a very useful tool for K8s development, it is lightweight, very easy to install, has support for multiple versions and is easy to reset.

QuickStart microk8s

  1. Install k8s using microk8s:

    snap install microk8s --classic --channel=1.14/stable

  2. Update the configuration of microk8s to allow for privileged mode: note for newer versions the allow-privileged flag is removed

    # kubelet config
# - add `--allow-privileged=true`
systemctl restart snap.microk8s.daemon-kubelet.service

#kube-apiserver config
# - add `--allow-privileged=true`
systemctl restart snap.microk8s.daemon-apiserver.service

  3. Verify the changes were successfully applied:

    ~snap services
Service                             Startup  Current  Notes
microk8s.daemon-apiserver           enabled  active   -
microk8s.daemon-apiserver-kicker    enabled  active   -
microk8s.daemon-containerd          enabled  active   -
microk8s.daemon-controller-manager  enabled  active   -
microk8s.daemon-etcd                enabled  active   -
microk8s.daemon-kubelet             enabled  active   -
microk8s.daemon-proxy               enabled  active   -
microk8s.daemon-scheduler           enabled  active   -

  4. If required make sure forwarding rules are enabled:

    sudo iptables -P FORWARD ACCEPT

  5. Make sure you update the arguments in the YAML file to point to the proper microk8s directories. For example:

    - name: registration-dir
  hostPath:
    path: /var/snap/microk8s/common/var/lib/kubelet/plugins_registry/
    type: Directory

Notice how the path now is prepended with /var/snap/microk8s/common/ compared to the original file. Depending on what distribution you are using, this might slightly differ.