# Kubernetes

<img src="https://github.com/kubernetes/kubernetes/raw/master/logo/logo.png" width="100">

----

Kubernetes without the features I don't care about.

Some of the removed features

* OpenAPI/Swagger
* cloud-controller-manager
* kube aggregation
* APIs (NOTE: most of these are old APIs that have been replaced)
  * admissionregistration/v1alpha1, authentication/v1beta1, authorization/v1beta1, certificates/v1beta1, events/v1beta1, imagepolicy/v1alpha1, rbac/v1alpha1, settings/v1alpha1, storage/v1alpha1,
* Authentication
  * bootstrap token, oidc
* Authorization
  * ABAC
* All alpha features
* Cloud Providers (all of them)
* Controllers
  * Bootstrap
  * Certificates
  * Cloud
  * Cloud based node IPAM
  * Route
* Credential Providers AWS/GCP/Azure/Rancher
* Kubelet
  * Device Plugin
  * Certificates
  * Checkpoint
  * Device Manager
  * Custom Metrics
  * Dockershim (IMPORTANT: No docker support, the only runtime that works in containerd)
  * GPU
  * Mount Pod
  * Network
    * Hairpin
    * Kubenet
  * rkt
* Volume Drivers
  * aws_ebs, azure_dd, azure_file, cephfs, cinder, fc, flocker, gce_pd, glusterfs, iscsi, photon_pd, portworx, quobyte, rbd, scaleio, storageos, vsphere_volume
* Admission Controllers
  * admin, alwayspullimages, antiaffinity, defaulttolerationseconds, deny, eventratelimit, exec, extendedresourcetoleration, gc, imagepolicy, initialreosurces, limitranger, namespace, noderestriction, persistentvolume, podnodeselector, podpreset, podtolerationrestriction, priority, resourcequota, security, securitycontext, storageobjectinuseprotection

What is left? A lot.  Basically all your normal pod/deployment/service stuff is there.  Most apps for kubernetes will run just fine.

Full Build
----------

    # Setup your GOPATH.  Note that this code should be at k8s.io/kubernetes in your GOPATH, not github.com/ibuildthecloud/k3s
    go build -o kubectl ./cmd/kubectl
    go build -o hyperkube ./cmd/hyperkube

Now just run hyperkube as you normally would.


Super Opinionated Approach that probably won't work for you
-----------------------------------------------------------

    # Setup your GOPATH.  Note that this code should be at k8s.io/kubernetes in your GOPATH, not github.com/ibuildthecloud/k3s
    go build -o k3s
    go build -o kubectl ./cmd/kubectl

Run
---

Run containerd

```bash
# Download and install containerd and runc
sudo curl -fL -o /usr/local/bin/runc https://github.com/opencontainers/runc/releases/download/v1.0.0-rc5/runc.amd64
sudo chmod +x /usr/local/bin/runc

curl -fsL https://github.com/containerd/containerd/releases/download/v1.1.1/containerd-1.1.1.linux-amd64.tar.gz | sudo tar xvf /usr/src/containerd.tgz -C /usr/local/bin bin/ --strip-components=1

# Some CNI
sudo mkdir -p /opt/cni/bin
curl -fsL https://github.com/containernetworking/plugins/releases/download/v0.7.1/cni-plugins-amd64-v0.7.1.tgz  | sudo tar xvzf - -C /opt/cni/bin ./loopback

sudo containerd &
```

Run Kubernetes

```bash
# Server
./k3s

# Agent (If doing this on another host copy the ./data folder)
sudo ./k3s agent

# Install Networking
export KUBECONFIG=./data/cred/kubeconfig.yaml
curl -s "https://cloud.weave.works/k8s/net?k8s-version=$(./kubectl version | base64 | tr -d '\n')" | ./kubectl apply -f -
```

Your kubeconfig file is in `./data/cred/kubeconfig.yaml`

Enjoy.