isabella232 / snap-kubernetes-worker

A complete Kubernetes worker

Kubernetes worker Snap package

This is currently a work in progress.

Installing

Install via snap.

sudo snap install kubernetes-worker

This will install the latest version of Kubernetes. If you would like to use an older version, you can see the available options.

snap info kubernetes-worker

An example of installing an older version.

sudo snap install kubernetes-worker --channel 1.14/stable

After installation, we will need to connect the remaining interfaces.

sudo snap connect kubernetes-worker:kernel-module-control

Configuration

kubeconfig

We must feed in a kubeconfig file to allow the worker to enrol with the cluster.

Example:

sudo snap set kubernetes-worker kubeconfig="$(cat ~/.kube/config)"

cacert

We also need to feed in a ca.cert to allow Kubernetes to get data from the kubelet.

Example:

sudo snap set kubernetes-worker cacert="$(cat ~/ca.crt)"

Commands

ctr

Access the underlying containerd CLI. Must be used with sudo.

Example:

sudo kubernetes-worker.ctr --namespace=k8s.io containers ls

kubectl

Run the Kubernetes CLI within the context of the Snap.

Example:

kubernetes-worker.kubectl get all --all-namespaces

Developer Notes

When building with snapcraft, due to the snap using core18, the build will take place within a multipass container. We need to up the default memory for this container, otherwise the build will fail. We can do this with the following command.

SNAPCRAFT_BUILD_ENVIRONMENT_MEMORY=8G snapcraft

We can also add cores to make the build faster.

SNAPCRAFT_BUILD_ENVIRONMENT_MEMORY=8G SNAPCRAFT_BUILD_ENVIRONMENT_CPU=8 snapcraft

Install the built snap.

sudo snap install ./kubernetes-worker_*.snap --dangerous

Connect all the interfaces.

for i in docker-privileged k8s-kubelet dot-kube docker-support firewall-control hardware-observe kernel-module-control mount-observe network-control process-control system-observe opengl; do sudo snap connect kubernetes-worker:$i; done

Cloud Providers

We are adding support for different cloud providers. Supported providers are listed below.

EKS

For instructions on deploying to EKS, see the Using with EKS wiki page.