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kubernetes-bootstrap

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Makefile for bootstrapping kubernetes cluster with Calico CNI & private Docker Image Registry

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# Kubernetes Bootstrap

Kubernetes installation on Ubuntu 16+ with Calico CNI (with hostPort enabled)
and private Docker Image registry DaemonSet on each node.

Bootstrap provides:

* Kubernetes installation via `kubeadm`,
* Kubernetes initialization via `kubeadm` with pods CIDR 192.168.0.0/16 (Calico
  CNI),
* Calico CNI configuration with chained portmap plugin (requirement for
  hostPort);
* Docker Image Registry via DaemonSet on each node (`localhost:5000`),
  restricted to localhost for security (by Calico Policy Rules).

Main difference from other guides and tutorials is that provided installation
supports `hostPort` option in `ports` mapping for `containers` (using `portmap`
plugin), so it's possible to expose container's port to host system. Also,
Docker Image Registry is protected by Calico Network Policy rule to
exclude external access.

# Requirements

* Ubuntu 16+,
* 2 CPU, 2Gb RAM.

# Usage

Commands starting with `@@` requires root login (or sudo) at target host.

All required parameters should be specified as variables assignment in form
of `make <var>=<value>... <command>`

## `make @@install`

Installs kubeadm to target host.

Parameters:

* `host` — target host.

## `make @@init`

Initializes kubernetes master, Calico CNI and Docker Image Registry.

Copy join token from command output to join additional nodes.

Label one of your nodes with `role: image-registry` in order to allocate
Docker Image Register node.

Parameters:

* `host` — target host.

*NOTE*: to allocate image registry you need to label one of your nodes with
`node: image-registry`:

```
kubectl label nodes <your-registry-node> role=image-registry
```

## `make @@join`

Joins target host to kubernetes master.

Parameters:

* `host` — target host,
* `token` — token to join host to master,
* `master` — master server address (`<host>:<port>`).

## `make @@create-user`

Create user certificate and key, signs user certificate using server key and
downloads them back.

Parameters:

* `host` — target host,
* `username` — user name (`CN=` section in certtificate),
* `organization` — org name (`O=` section in certificate),
* `days` — certificate expiration time.

## `make @connect-registry`

Connects Docker Image Registry to local machine. Imaage Registry will be
available at address `localhost:5000`.

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