DIY Kubernetes

WARNING: These instructions must be run as root, and will expose all standard Kubernetes ports and a few non-standard ports to potential security attacks. Use at your own risk.

Running one Master and many Nodes on different hosts.

Create a Kubernetes clusters. Tested on Ubuntu baremetal and AWS EC2.

Requirements

• Ubuntu 18.04
• Docker

Run the Master

1. git clone https://github.com/mingfang/docker-kubernetes-master
2. cd docker-kubernetes-master
3. ./build
4. ./run

The Master is now running

Run the Nodes(one per host)

Note: Tested on Ubuntu 18.04. Newer versions should work but not tested.

1. git clone https://github.com/mingfang/docker-kubernetes-node
2. cd docker-kubernetes-node
3. ./build
4. On the Master, run docker exec kmaster /bootstrap-tokens.sh to generate the keys needed.
5. On the Node, run the command printed by #4. Should look something like this

KUBELET_TOKEN=s.oKCwIqfs7LGbIHJv666K9oFV PROXY_TOKEN=s.4TkiUcFsscWufhHUOzPjKgxn ./run <master-host>

The Node is now running. Repeat for every host that runs the Nodes.

Verify

1. alias kubectl='docker exec kmaster kubectl' on the Master host
2. kubectl get nodes
3. You should see all the Nodes running

NAME            LABELS                                            STATUS
192.168.1.160   host=minux,kubernetes.io/hostname=192.168.1.160   Ready
192.168.1.162   host=vm2,kubernetes.io/hostname=192.168.1.162     Ready
192.168.1.163   host=vm3,kubernetes.io/hostname=192.168.1.163     Ready
192.168.1.164   host=vm4,kubernetes.io/hostname=192.168.1.164     Ready
192.168.1.168   host=vm1,kubernetes.io/hostname=192.168.1.168     Ready

Master

docker-kubernetes-master

Node

docker-kubernetes-node

Terraform Plugin

terraform-provider-k8s